From ecc6c4aed2d7d7353e31d3f96c142c3645aca769 Mon Sep 17 00:00:00 2001
From: "grigorii.kirgizov" <grigorii.kirgizov@jetbrains.com>
Date: Mon, 21 Jan 2019 13:21:06 +0300
Subject: [PATCH] lc: Add Constraint check for unified terms. Few fixes for
 typeclasses. Add typecheck deps for typeclasses. Some tests.

Some Constraints checks are not covered by 'subsumed', so, need top rule for discharging those.
Fix Constraint set production in 'types', use new set for each type var. Fix 'instance' constraint.
---
 .../samples.lambdacalc/models/types.mps       |  776 +++++++----
 .../models/samples.lambdacalc.demo.mps        | 1219 ++++++++++++++++-
 2 files changed, 1741 insertions(+), 254 deletions(-)

diff --git a/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps b/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps
index 248266e0..b1405bca 100644
--- a/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps
+++ b/samples/lambdacalc/languages/samples.lambdacalc/models/types.mps
@@ -38,6 +38,7 @@
         <child id="1068498886297" name="rValue" index="37vLTx" />
         <child id="1068498886295" name="lValue" index="37vLTJ" />
       </concept>
+      <concept id="4836112446988635817" name="jetbrains.mps.baseLanguage.structure.UndefinedType" flags="in" index="2jxLKc" />
       <concept id="1202948039474" name="jetbrains.mps.baseLanguage.structure.InstanceMethodCallOperation" flags="nn" index="liA8E" />
       <concept id="1465982738277781862" name="jetbrains.mps.baseLanguage.structure.PlaceholderMember" flags="ng" index="2tJIrI" />
       <concept id="1239709250944" name="jetbrains.mps.baseLanguage.structure.PrefixIncrementExpression" flags="nn" index="2$rviw" />
@@ -99,6 +100,7 @@
         <child id="1068580123135" name="body" index="3clF47" />
       </concept>
       <concept id="1068580123165" name="jetbrains.mps.baseLanguage.structure.InstanceMethodDeclaration" flags="ig" index="3clFb_" />
+      <concept id="1068580123152" name="jetbrains.mps.baseLanguage.structure.EqualsExpression" flags="nn" index="3clFbC" />
       <concept id="1068580123155" name="jetbrains.mps.baseLanguage.structure.ExpressionStatement" flags="nn" index="3clFbF">
         <child id="1068580123156" name="expression" index="3clFbG" />
       </concept>
@@ -182,6 +184,7 @@
     </language>
     <language id="fd392034-7849-419d-9071-12563d152375" name="jetbrains.mps.baseLanguage.closures">
       <concept id="1199569711397" name="jetbrains.mps.baseLanguage.closures.structure.ClosureLiteral" flags="nn" index="1bVj0M">
+        <child id="1199569906740" name="parameter" index="1bW2Oz" />
         <child id="1199569916463" name="body" index="1bW5cS" />
       </concept>
     </language>
@@ -210,7 +213,6 @@
         <reference id="8829335963593822893" name="declaration" index="a7OzE" />
         <child id="6036655413806858011" name="indexExpr" index="3gCZO6" />
       </concept>
-      <concept id="8829335963591332101" name="jetbrains.mps.logic.structure.LogicalItem" flags="ng" index="aYkH2" />
       <concept id="8829335963591530299" name="jetbrains.mps.logic.structure.ExpressionLogicalVariable" flags="ng" index="aZ4PW">
         <child id="8829335963591530990" name="expression" index="aZ4eD" />
       </concept>
@@ -276,6 +278,7 @@
       <concept id="1145383075378" name="jetbrains.mps.lang.smodel.structure.SNodeListType" flags="in" index="2I9FWS">
         <reference id="1145383142433" name="elementConcept" index="2I9WkF" />
       </concept>
+      <concept id="1171305280644" name="jetbrains.mps.lang.smodel.structure.Node_GetDescendantsOperation" flags="nn" index="2Rf3mk" />
       <concept id="1145567426890" name="jetbrains.mps.lang.smodel.structure.SNodeListCreator" flags="nn" index="2T8Vx0">
         <child id="1145567471833" name="createdType" index="2T96Bj" />
       </concept>
@@ -358,12 +361,16 @@
       <concept id="4774429934441520217" name="samples.lambdacalc.structure.BoolType" flags="ng" index="3P8Jbz" />
     </language>
     <language id="83888646-71ce-4f1c-9c53-c54016f6ad4f" name="jetbrains.mps.baseLanguage.collections">
+      <concept id="1204796164442" name="jetbrains.mps.baseLanguage.collections.structure.InternalSequenceOperation" flags="nn" index="23sCx2">
+        <child id="1204796294226" name="closure" index="23t8la" />
+      </concept>
       <concept id="540871147943773365" name="jetbrains.mps.baseLanguage.collections.structure.SingleArgumentSequenceOperation" flags="nn" index="25WWJ4">
         <child id="540871147943773366" name="argument" index="25WWJ7" />
       </concept>
       <concept id="1201306600024" name="jetbrains.mps.baseLanguage.collections.structure.ContainsKeyOperation" flags="nn" index="2Nt0df">
         <child id="1201654602639" name="key" index="38cxEo" />
       </concept>
+      <concept id="1203518072036" name="jetbrains.mps.baseLanguage.collections.structure.SmartClosureParameterDeclaration" flags="ig" index="Rh6nW" />
       <concept id="1160612413312" name="jetbrains.mps.baseLanguage.collections.structure.AddElementOperation" flags="nn" index="TSZUe" />
       <concept id="1162935959151" name="jetbrains.mps.baseLanguage.collections.structure.GetSizeOperation" flags="nn" index="34oBXx" />
       <concept id="1197683403723" name="jetbrains.mps.baseLanguage.collections.structure.MapType" flags="in" index="3rvAFt">
@@ -378,6 +385,7 @@
         <child id="1225711182005" name="list" index="1y566C" />
         <child id="1225711191269" name="index" index="1y58nS" />
       </concept>
+      <concept id="1202120902084" name="jetbrains.mps.baseLanguage.collections.structure.WhereOperation" flags="nn" index="3zZkjj" />
       <concept id="1197932370469" name="jetbrains.mps.baseLanguage.collections.structure.MapElement" flags="nn" index="3EllGN">
         <child id="1197932505799" name="map" index="3ElQJh" />
         <child id="1197932525128" name="key" index="3ElVtu" />
@@ -1038,7 +1046,10 @@
                       </node>
                     </node>
                     <node concept="a7P8L" id="47tET_WaO8U" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_WaO6n" resolve="EmptySet" />
+                      <ref role="a7OzE" node="47tET_WJODj" resolve="NewSet" />
+                      <node concept="37vLTw" id="47tET_WI9bS" role="3gCZO6">
+                        <ref role="3cqZAo" node="3vXKzDNGBmM" resolve="i" />
+                      </node>
                     </node>
                   </node>
                 </node>
@@ -1168,7 +1179,10 @@
                     </node>
                   </node>
                   <node concept="a7P8L" id="47tET_WaO7m" role="3AunhB">
-                    <ref role="a7OzE" node="47tET_WaO6n" resolve="EmptySet" />
+                    <ref role="a7OzE" node="47tET_WJODj" resolve="NewSet" />
+                    <node concept="37vLTw" id="47tET_WI9c8" role="3gCZO6">
+                      <ref role="3cqZAo" node="3vXKzDNU1kh" resolve="i" />
+                    </node>
                   </node>
                 </node>
               </node>
@@ -1459,6 +1473,15 @@
               <node concept="34oBXx" id="3vXKzDNGQDM" role="2OqNvi" />
             </node>
           </node>
+          <node concept="aZer4" id="47tET_WJODj" role="3XD1gS">
+            <property role="TrG5h" value="NewSet" />
+            <node concept="2OqwBi" id="47tET_WJQcv" role="3gj$pD">
+              <node concept="3tDTZT" id="47tET_WJOEh" role="2Oq$k0">
+                <ref role="3tDTNw" node="3vXKzDNGwTQ" resolve="tvs" />
+              </node>
+              <node concept="34oBXx" id="47tET_WJUv4" role="2OqNvi" />
+            </node>
+          </node>
           <node concept="aZer4" id="47tET_W4Xjp" role="3XD1gS">
             <property role="TrG5h" value="TmpCts" />
             <node concept="2OqwBi" id="47tET_W4YQj" role="3gj$pD">
@@ -1509,9 +1532,6 @@
               </node>
             </node>
           </node>
-          <node concept="aZer4" id="47tET_WaO6n" role="3XD1gS">
-            <property role="TrG5h" value="EmptySet" />
-          </node>
         </node>
       </node>
       <node concept="3eYOCq" id="2mKpIXwNDzt" role="3eYTkm">
@@ -1564,7 +1584,7 @@
                 <ref role="ns1xF" node="3vXKzDNDVgC" resolve="Constraint" />
                 <node concept="nsMwS" id="47tET_W4Toq" role="ns1xD">
                   <ref role="nsMwP" node="47tET_W4Sc3" resolve="typeclass" />
-                  <node concept="3tDTZT" id="47tET_W4UFx" role="nsMwV">
+                  <node concept="3tDTZT" id="47tET_WyR$j" role="nsMwV">
                     <ref role="3tDTNw" node="47tET_W4R$U" resolve="tcPtr" />
                   </node>
                 </node>
@@ -4405,7 +4425,7 @@
         <property role="TrG5h" value="constraintsNlist" />
       </node>
       <node concept="1zAUYm" id="48ZGLP7rIKj" role="1zAUyy">
-        <property role="TrG5h" value="nlist" />
+        <property role="TrG5h" value="typeVarsNlist" />
       </node>
       <node concept="1zAUYm" id="48ZGLP7rIKl" role="1zAUyy">
         <property role="TrG5h" value="varNames" />
@@ -4414,6 +4434,39 @@
         <property role="TrG5h" value="typeVars" />
       </node>
     </node>
+    <node concept="3AqmO8" id="47tET_WiT7i" role="8PkJo">
+      <property role="TrG5h" value="toRecoverConstraints" />
+      <node concept="1zAUYm" id="47tET_WiT9_" role="1zAUyy">
+        <property role="TrG5h" value="typeVar" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WiT9B" role="1zAUyy">
+        <property role="TrG5h" value="constraintsSet" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_WheG$" role="8PkJo">
+      <property role="TrG5h" value="recoverConstraints" />
+      <node concept="1zAUYm" id="47tET_WheIF" role="1zAUyy">
+        <property role="TrG5h" value="nlist" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WheIH" role="1zAUyy">
+        <property role="TrG5h" value="typeVar" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WiOIe" role="1zAUyy">
+        <property role="TrG5h" value="typeVarNode" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_Whfh$" role="8PkJo">
+      <property role="TrG5h" value="recoverConstraintList" />
+      <node concept="1zAUYm" id="47tET_WhhV4" role="1zAUyy">
+        <property role="TrG5h" value="nlist" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WiOEx" role="1zAUyy">
+        <property role="TrG5h" value="typeVarNode" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WhhV6" role="1zAUyy">
+        <property role="TrG5h" value="consList" />
+      </node>
+    </node>
     <node concept="1nLNMY" id="47tET_WlKbY" role="1nK1Vg">
       <property role="TrG5h" value="reproduceTypeConstraints_start" />
       <node concept="3clFbS" id="47tET_WlKbZ" role="1nLNMH">
@@ -5688,10 +5741,10 @@
                 <node concept="aZer4" id="48ZGLP7rHRI" role="3XD1gS">
                   <property role="TrG5h" value="TVNodes" />
                 </node>
-                <node concept="2I9FWS" id="48ZGLP7rHS1" role="3vLBG7" />
                 <node concept="aZer4" id="47tET_WiRqd" role="3XD1gS">
                   <property role="TrG5h" value="CtsNodes" />
                 </node>
+                <node concept="2I9FWS" id="48ZGLP7rHS1" role="3vLBG7" />
               </node>
               <node concept="3NuqgR" id="6EwjVjWszQ6" role="0eVf_">
                 <node concept="aZer4" id="6EwjVjWszQ7" role="3XD1gS">
@@ -6058,39 +6111,6 @@
         </node>
       </node>
     </node>
-    <node concept="3AqmO8" id="47tET_WiT7i" role="8PkJo">
-      <property role="TrG5h" value="toRecoverConstraints" />
-      <node concept="1zAUYm" id="47tET_WiT9_" role="1zAUyy">
-        <property role="TrG5h" value="typeVar" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WiT9B" role="1zAUyy">
-        <property role="TrG5h" value="constraintsSet" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_WheG$" role="8PkJo">
-      <property role="TrG5h" value="recoverConstraints" />
-      <node concept="1zAUYm" id="47tET_WheIF" role="1zAUyy">
-        <property role="TrG5h" value="nlist" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WheIH" role="1zAUyy">
-        <property role="TrG5h" value="typeVar" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WiOIe" role="1zAUyy">
-        <property role="TrG5h" value="typeVarNode" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_Whfh$" role="8PkJo">
-      <property role="TrG5h" value="recoverConstraintList" />
-      <node concept="1zAUYm" id="47tET_WhhV4" role="1zAUyy">
-        <property role="TrG5h" value="nlist" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WiOEx" role="1zAUyy">
-        <property role="TrG5h" value="typeVarNode" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WhhV6" role="1zAUyy">
-        <property role="TrG5h" value="consList" />
-      </node>
-    </node>
     <node concept="1nLNMY" id="47tET_WheYl" role="1nK1Vg">
       <property role="TrG5h" value="recoverConstraints" />
       <node concept="3clFbS" id="47tET_WheYm" role="1nLNMH">
@@ -8473,7 +8493,7 @@
                 </node>
                 <node concept="3I6s7M" id="47tET_WuRco" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_WuRcm" role="3I6s78">
-                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkAllConstraints" />
+                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkConstraints" />
                     <node concept="a7P8L" id="47tET_WuRcE" role="3AunhB">
                       <ref role="a7OzE" node="48ZGLP8pH7l" resolve="ITVs" />
                     </node>
@@ -8595,7 +8615,7 @@
                 </node>
                 <node concept="3I6s7M" id="47tET_WuRd9" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_WuRd7" role="3I6s78">
-                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkAllConstraints" />
+                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkConstraints" />
                     <node concept="a7P8L" id="47tET_WuRdr" role="3AunhB">
                       <ref role="a7OzE" node="48ZGLP8pI8i" resolve="ITVs" />
                     </node>
@@ -9942,6 +9962,29 @@
     <node concept="1nLNMY" id="47tET_W4WNF" role="1nK1Vg">
       <property role="TrG5h" value="getType_Typeclass" />
       <node concept="3clFbS" id="47tET_W4WNG" role="1nLNMH">
+        <node concept="Oftf1" id="47tET_WBVgq" role="3cqZAp">
+          <node concept="2OqwBi" id="47tET_WBVgs" role="Oftjs">
+            <node concept="1PxgMI" id="47tET_WBWhA" role="2Oq$k0">
+              <node concept="chp4Y" id="47tET_WBWln" role="3oSUPX">
+                <ref role="cht4Q" to="8tt8:7_8aRkgDGQC" resolve="Doc" />
+              </node>
+              <node concept="2OqwBi" id="47tET_WBVgt" role="1m5AlR">
+                <node concept="3A2sRY" id="47tET_WBVgu" role="2Oq$k0">
+                  <ref role="3A2yKK" node="47tET_W4WOD" resolve="tc" />
+                </node>
+                <node concept="1mfA1w" id="47tET_WBVgv" role="2OqNvi" />
+              </node>
+            </node>
+            <node concept="2Rf3mk" id="47tET_WBVgw" role="2OqNvi">
+              <node concept="3gmYPX" id="47tET_WD50G" role="1xVPHs">
+                <node concept="3gn64h" id="47tET_WD50H" role="3gmYPZ">
+                  <ref role="3gnhBz" to="8tt8:2O9ahh6mHnO" resolve="Instance" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbH" id="47tET_WD54$" role="3cqZAp" />
         <node concept="3SKdUt" id="47tET_W4Xct" role="3cqZAp">
           <node concept="3SKdUq" id="47tET_W4Xcv" role="3SKWNk">
             <property role="3SKdUp" value="Make a Constraint for typevar with this Typeclass" />
@@ -10049,6 +10092,54 @@
             </node>
           </node>
         </node>
+        <node concept="1X3_iC" id="47tET_WBVt3" role="lGtFl">
+          <property role="3V$3am" value="statement" />
+          <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
+          <node concept="Oftf1" id="47tET_WAuhA" role="8Wnug">
+            <node concept="2OqwBi" id="47tET_WAvQg" role="Oftjs">
+              <node concept="2OqwBi" id="47tET_WAhNZ" role="2Oq$k0">
+                <node concept="2OqwBi" id="47tET_WAcJf" role="2Oq$k0">
+                  <node concept="3A2sRY" id="47tET_WAcAF" role="2Oq$k0">
+                    <ref role="3A2yKK" node="47tET_W4WOD" resolve="tc" />
+                  </node>
+                  <node concept="1mfA1w" id="47tET_WAdcE" role="2OqNvi" />
+                </node>
+                <node concept="2Rf3mk" id="47tET_WAsBB" role="2OqNvi">
+                  <node concept="1xMEDy" id="47tET_WAsBD" role="1xVPHs">
+                    <node concept="chp4Y" id="47tET_WAsPs" role="ri$Ld">
+                      <ref role="cht4Q" to="8tt8:2O9ahh6mHnO" resolve="Instance" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="3zZkjj" id="47tET_WADDI" role="2OqNvi">
+                <node concept="1bVj0M" id="47tET_WADDK" role="23t8la">
+                  <node concept="3clFbS" id="47tET_WADDL" role="1bW5cS">
+                    <node concept="3clFbF" id="47tET_WADHG" role="3cqZAp">
+                      <node concept="3clFbC" id="47tET_WAMoz" role="3clFbG">
+                        <node concept="3A2sRY" id="47tET_WAM$C" role="3uHU7w">
+                          <ref role="3A2yKK" node="47tET_W4WOD" resolve="tc" />
+                        </node>
+                        <node concept="2OqwBi" id="47tET_WADUo" role="3uHU7B">
+                          <node concept="37vLTw" id="47tET_WADHF" role="2Oq$k0">
+                            <ref role="3cqZAo" node="47tET_WADDM" resolve="it" />
+                          </node>
+                          <node concept="3TrEf2" id="47tET_WAHHN" role="2OqNvi">
+                            <ref role="3Tt5mk" to="8tt8:2O9ahh6mHo2" resolve="typeclass" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                  </node>
+                  <node concept="Rh6nW" id="47tET_WADDM" role="1bW2Oz">
+                    <property role="TrG5h" value="it" />
+                    <node concept="2jxLKc" id="47tET_WADDN" role="1tU5fm" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
       </node>
       <node concept="2t___k" id="47tET_W4WOC" role="1nLNMg">
         <ref role="2t_S0q" to="8tt8:2O9ahh6mHnA" resolve="Typeclass" />
@@ -10060,6 +10151,16 @@
     <node concept="1nLNMY" id="47tET_W4O_Z" role="1nK1Vg">
       <property role="TrG5h" value="getType_Instance" />
       <node concept="3clFbS" id="47tET_W4OA0" role="1nLNMH">
+        <node concept="1mebxG" id="47tET_WAbZ6" role="3cqZAp">
+          <node concept="2OqwBi" id="47tET_WAc7L" role="1mebXD">
+            <node concept="3A2sRY" id="47tET_WAbZT" role="2Oq$k0">
+              <ref role="3A2yKK" node="47tET_W4OB4" resolve="inst" />
+            </node>
+            <node concept="3TrEf2" id="47tET_WAcyW" role="2OqNvi">
+              <ref role="3Tt5mk" to="8tt8:2O9ahh6mHo2" resolve="typeclass" />
+            </node>
+          </node>
+        </node>
         <node concept="3cpWs8" id="47tET_WsEYJ" role="3cqZAp">
           <node concept="3cpWsn" id="47tET_WsEYM" role="3cpWs9">
             <property role="TrG5h" value="tcPtr" />
@@ -10116,9 +10217,13 @@
                     <node concept="3Aqczg" id="47tET_WsGKC" role="3cqZAp">
                       <node concept="3Aqt3T" id="47tET_WsEY3" role="3Aqpz8">
                         <ref role="3AqCNq" node="47tET_WsEA7" resolve="instance" />
-                        <node concept="HKQnh" id="47tET_WsGBi" role="3AunhB">
-                          <node concept="37vLTw" id="47tET_WsGBn" role="HKQng">
-                            <ref role="3cqZAo" node="47tET_WsEYM" resolve="tcPtr" />
+                        <node concept="ns1u0" id="47tET_W_5pi" role="3AunhB">
+                          <ref role="ns1xF" node="3vXKzDNDVgC" resolve="Constraint" />
+                          <node concept="nsMwS" id="47tET_W_5pl" role="ns1xD">
+                            <ref role="nsMwP" node="47tET_W4Sc3" resolve="typeclass" />
+                            <node concept="37vLTw" id="47tET_W_5pp" role="nsMwV">
+                              <ref role="3cqZAo" node="47tET_WsEYM" resolve="tcPtr" />
+                            </node>
                           </node>
                         </node>
                         <node concept="a7P8L" id="47tET_WsGKu" role="3AunhB">
@@ -10150,6 +10255,24 @@
             </node>
           </node>
         </node>
+        <node concept="1X3_iC" id="47tET_WE8Dp" role="lGtFl">
+          <property role="3V$3am" value="statement" />
+          <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
+          <node concept="Oftf1" id="47tET_WDA$B" role="8Wnug">
+            <node concept="2OqwBi" id="47tET_WDAJg" role="Oftjs">
+              <node concept="3A2sRY" id="47tET_WDA_G" role="2Oq$k0">
+                <ref role="3A2yKK" node="47tET_W4OB4" resolve="inst" />
+              </node>
+              <node concept="2Rf3mk" id="47tET_WDBmM" role="2OqNvi">
+                <node concept="1xMEDy" id="47tET_WDBmO" role="1xVPHs">
+                  <node concept="chp4Y" id="47tET_WDBnv" role="ri$Ld">
+                    <ref role="cht4Q" to="8tt8:2O9ahh6mHnU" resolve="PrototypeImpl" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
       </node>
       <node concept="2t___k" id="47tET_W4OB3" role="1nLNMg">
         <ref role="2t_S0q" to="8tt8:2O9ahh6mHnO" resolve="Instance" />
@@ -10363,11 +10486,6 @@
             </node>
           </node>
         </node>
-        <node concept="1mebxG" id="47tET_W7Kcf" role="3cqZAp">
-          <node concept="37vLTw" id="47tET_W7N$Y" role="1mebXD">
-            <ref role="3cqZAo" node="47tET_W7Mhc" resolve="inst" />
-          </node>
-        </node>
         <node concept="1mebxG" id="47tET_W7LGn" role="3cqZAp">
           <node concept="2OqwBi" id="47tET_W7LOA" role="1mebXD">
             <node concept="3A2sRY" id="47tET_W7LGG" role="2Oq$k0">
@@ -10694,6 +10812,15 @@
             </node>
           </node>
         </node>
+        <node concept="1X3_iC" id="47tET_WDAxE" role="lGtFl">
+          <property role="3V$3am" value="statement" />
+          <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
+          <node concept="1mebxG" id="47tET_W7Kcf" role="8Wnug">
+            <node concept="37vLTw" id="47tET_W7N$Y" role="1mebXD">
+              <ref role="3cqZAo" node="47tET_W7Mhc" resolve="inst" />
+            </node>
+          </node>
+        </node>
       </node>
       <node concept="2t___k" id="47tET_W7KbU" role="1nLNMg">
         <ref role="2t_S0q" to="8tt8:2O9ahh6mHnU" resolve="PrototypeImpl" />
@@ -10915,57 +11042,6 @@
         </node>
       </node>
     </node>
-    <node concept="3AqmO8" id="47tET_W4MQo" role="8PkJo">
-      <property role="TrG5h" value="set" />
-      <node concept="1zAUYm" id="47tET_W4MQq" role="1zAUyy">
-        <property role="TrG5h" value="handle" />
-      </node>
-      <node concept="1zAUYm" id="47tET_W4MQs" role="1zAUyy">
-        <property role="TrG5h" value="elem" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_Wrvyw" role="8PkJo">
-      <property role="TrG5h" value="setCopy" />
-      <node concept="1zAUYm" id="47tET_WrvyI" role="1zAUyy">
-        <property role="TrG5h" value="handle" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WrvyK" role="1zAUyy">
-        <property role="TrG5h" value="newHandle" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_WsDrE" role="8PkJo">
-      <property role="TrG5h" value="isSubset" />
-      <node concept="1zAUYm" id="47tET_WsDrX" role="1zAUyy">
-        <property role="TrG5h" value="subset" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WsDrZ" role="1zAUyy">
-        <property role="TrG5h" value="set" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WsDvc" role="1zAUyy">
-        <property role="TrG5h" value="result" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_WsDRa" role="8PkJo">
-      <property role="TrG5h" value="isSubsetHelper" />
-      <node concept="1zAUYm" id="47tET_WsDRx" role="1zAUyy">
-        <property role="TrG5h" value="subset" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WsDRz" role="1zAUyy">
-        <property role="TrG5h" value="set" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WsDRA" role="1zAUyy">
-        <property role="TrG5h" value="result" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_W4NQw" role="8PkJo">
-      <property role="TrG5h" value="setToCons" />
-      <node concept="1zAUYm" id="47tET_W4NQ_" role="1zAUyy">
-        <property role="TrG5h" value="setHandle" />
-      </node>
-      <node concept="1zAUYm" id="47tET_W4NQB" role="1zAUyy">
-        <property role="TrG5h" value="consList" />
-      </node>
-    </node>
     <node concept="1nLNMY" id="47tET_WrvuV" role="1nK1Vg">
       <property role="TrG5h" value="setCopy" />
       <node concept="3clFbS" id="47tET_WrvuW" role="1nLNMH">
@@ -11290,6 +11366,57 @@
         </node>
       </node>
     </node>
+    <node concept="3AqmO8" id="47tET_W4MQo" role="8PkJo">
+      <property role="TrG5h" value="set" />
+      <node concept="1zAUYm" id="47tET_W4MQq" role="1zAUyy">
+        <property role="TrG5h" value="handle" />
+      </node>
+      <node concept="1zAUYm" id="47tET_W4MQs" role="1zAUyy">
+        <property role="TrG5h" value="elem" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_Wrvyw" role="8PkJo">
+      <property role="TrG5h" value="setCopy" />
+      <node concept="1zAUYm" id="47tET_WrvyI" role="1zAUyy">
+        <property role="TrG5h" value="handle" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WrvyK" role="1zAUyy">
+        <property role="TrG5h" value="newHandle" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_WsDrE" role="8PkJo">
+      <property role="TrG5h" value="isSubset" />
+      <node concept="1zAUYm" id="47tET_WsDrX" role="1zAUyy">
+        <property role="TrG5h" value="subset" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WsDrZ" role="1zAUyy">
+        <property role="TrG5h" value="set" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WsDvc" role="1zAUyy">
+        <property role="TrG5h" value="result" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_WsDRa" role="8PkJo">
+      <property role="TrG5h" value="isSubsetHelper" />
+      <node concept="1zAUYm" id="47tET_WsDRx" role="1zAUyy">
+        <property role="TrG5h" value="subset" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WsDRz" role="1zAUyy">
+        <property role="TrG5h" value="set" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WsDRA" role="1zAUyy">
+        <property role="TrG5h" value="result" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_W4NQw" role="8PkJo">
+      <property role="TrG5h" value="setToCons" />
+      <node concept="1zAUYm" id="47tET_W4NQ_" role="1zAUyy">
+        <property role="TrG5h" value="setHandle" />
+      </node>
+      <node concept="1zAUYm" id="47tET_W4NQB" role="1zAUyy">
+        <property role="TrG5h" value="consList" />
+      </node>
+    </node>
   </node>
   <node concept="AVZre" id="47tET_W6GBd">
     <property role="TrG5h" value="typeConstraints" />
@@ -11308,6 +11435,9 @@
         <property role="TrG5h" value="typeVars" />
       </node>
     </node>
+    <node concept="3AqmO8" id="47tET_WlK9C" role="8PkJo">
+      <property role="TrG5h" value="reproduceTypeConstraints" />
+    </node>
     <node concept="1nLNMY" id="47tET_W4RYO" role="1nK1Vg">
       <property role="TrG5h" value="typeConstraints_mergeSets" />
       <node concept="3clFbS" id="47tET_W4RYP" role="1nLNMH">
@@ -11394,6 +11524,72 @@
         </node>
       </node>
     </node>
+    <node concept="1nLNMY" id="47tET_WwVxG" role="1nK1Vg">
+      <property role="TrG5h" value="typeConstraints_disharge" />
+      <node concept="3clFbS" id="47tET_WwVxH" role="1nLNMH">
+        <node concept="3SKdUt" id="47tET_WwVLX" role="3cqZAp">
+          <node concept="3SKdUq" id="47tET_WwVLZ" role="3SKWNk">
+            <property role="3SKdUp" value="Discharges Constraints when they're satisfied" />
+          </node>
+        </node>
+        <node concept="1nLNNL" id="47tET_WGoXa" role="3cqZAp">
+          <node concept="1nLNMm" id="47tET_WGoXb" role="1nLNNK">
+            <node concept="3Aq93q" id="47tET_WGoXc" role="1nLNMb">
+              <property role="3ArMco" value="true" />
+              <node concept="3I6sU6" id="47tET_WGoXd" role="3Ip0Jz">
+                <node concept="3I6s7M" id="47tET_WGoXe" role="3I6sU7">
+                  <node concept="3Aqt3T" id="47tET_WGoXf" role="3I6s78">
+                    <ref role="3AqCNq" node="47tET_W4MQg" resolve="typeConstraints" />
+                    <node concept="a7P8L" id="47tET_WGp9x" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WGp90" resolve="Type" />
+                    </node>
+                    <node concept="a7P8L" id="47tET_WGp9r" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WGp99" resolve="CtrSetToSat" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9E8" id="47tET_WGoXi" role="1nLNMd">
+              <node concept="3I6sU6" id="47tET_WGoXj" role="3Ip0Jz">
+                <node concept="3I6s7M" id="47tET_WGoXk" role="3I6sU7">
+                  <node concept="3Aqt3T" id="47tET_WGp8R" role="3I6s78">
+                    <ref role="3AqCNq" node="47tET_Wgb9$" resolve="checkVarConstraints" />
+                    <node concept="a7P8L" id="47tET_WGpde" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WGp90" resolve="Type" />
+                    </node>
+                    <node concept="a7P8L" id="47tET_WGpdq" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WGp99" resolve="CtrSetToSat" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="0eUR_" id="47tET_WGp8X" role="0UC6o">
+              <node concept="3NuqgR" id="47tET_WGp8Z" role="0eVf_">
+                <node concept="aZer4" id="47tET_WGp90" role="3XD1gS">
+                  <property role="TrG5h" value="Type" />
+                </node>
+                <node concept="aZer4" id="47tET_WGp99" role="3XD1gS">
+                  <property role="TrG5h" value="CtrSetToSat" />
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9_M" id="47tET_WHvtc" role="1nLNMa">
+              <node concept="3I6sU6" id="47tET_WHvtd" role="3Ip0Jz">
+                <node concept="3I6s7M" id="47tET_WHvth" role="3I6sU7">
+                  <node concept="2aM9Np" id="47tET_WHvtg" role="3I6s78">
+                    <node concept="a7P8L" id="47tET_WHvtk" role="2aLmnP">
+                      <ref role="a7OzE" node="47tET_WGp90" resolve="Type" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
     <node concept="1nLNMY" id="47tET_W6FC8" role="1nK1Vg">
       <property role="TrG5h" value="produceTypeConstraints" />
       <node concept="3clFbS" id="47tET_W6FC9" role="1nLNMH">
@@ -11707,78 +11903,6 @@
         </node>
       </node>
     </node>
-    <node concept="3AqmO8" id="47tET_WlK9C" role="8PkJo">
-      <property role="TrG5h" value="reproduceTypeConstraints" />
-    </node>
-    <node concept="3AqmO8" id="47tET_WgaZR" role="8PkJo">
-      <property role="TrG5h" value="checkAllConstraints" />
-      <node concept="1zAUYm" id="47tET_WgaZY" role="1zAUyy">
-        <property role="TrG5h" value="typeVars" />
-      </node>
-      <node concept="1zAUYm" id="47tET_Wgb00" role="1zAUyy">
-        <property role="TrG5h" value="originalTypeVars" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_Wgb9$" role="8PkJo">
-      <property role="TrG5h" value="checkVarConstraints" />
-      <node concept="1zAUYm" id="47tET_Wgb9I" role="1zAUyy">
-        <property role="TrG5h" value="typeVar" />
-      </node>
-      <node concept="1zAUYm" id="47tET_Wgb9S" role="1zAUyy">
-        <property role="TrG5h" value="typeVarConstraintsSet" />
-      </node>
-      <node concept="1zAUYm" id="47tET_Wgb9V" role="1zAUyy">
-        <property role="TrG5h" value="type" />
-      </node>
-      <node concept="1zAUYm" id="47tET_Wgb9Z" role="1zAUyy">
-        <property role="TrG5h" value="typeConstraintsSet" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_Wh9Mr" role="8PkJo">
-      <property role="TrG5h" value="strengthCheck" />
-      <node concept="1zAUYm" id="47tET_Wh9MH" role="1zAUyy">
-        <property role="TrG5h" value="weakerSet" />
-      </node>
-      <node concept="1zAUYm" id="47tET_Wh9MJ" role="1zAUyy">
-        <property role="TrG5h" value="strongerSet" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_Wh6jP" role="8PkJo">
-      <property role="TrG5h" value="instanceCheck" />
-      <node concept="1zAUYm" id="47tET_Wh6k4" role="1zAUyy">
-        <property role="TrG5h" value="type" />
-      </node>
-      <node concept="1zAUYm" id="47tET_Wh6k6" role="1zAUyy">
-        <property role="TrG5h" value="typeConstraintSet" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_WsEug" role="8PkJo">
-      <property role="TrG5h" value="instanceCheckHelper" />
-      <node concept="1zAUYm" id="47tET_WsEuA" role="1zAUyy">
-        <property role="TrG5h" value="type" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WsEuC" role="1zAUyy">
-        <property role="TrG5h" value="typeConstraintList" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_WsED9" role="8PkJo">
-      <property role="TrG5h" value="checkSingleInstance" />
-      <node concept="1zAUYm" id="47tET_WsED_" role="1zAUyy">
-        <property role="TrG5h" value="type" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WsEDB" role="1zAUyy">
-        <property role="TrG5h" value="typeConstraint" />
-      </node>
-    </node>
-    <node concept="3AqmO8" id="47tET_WsEA7" role="8PkJo">
-      <property role="TrG5h" value="instance" />
-      <node concept="1zAUYm" id="47tET_WsEAw" role="1zAUyy">
-        <property role="TrG5h" value="typeclassPtr" />
-      </node>
-      <node concept="1zAUYm" id="47tET_WsEAy" role="1zAUyy">
-        <property role="TrG5h" value="instanceTypeScheme" />
-      </node>
-    </node>
     <node concept="1nLNMY" id="47tET_WlKzX" role="1nK1Vg">
       <property role="TrG5h" value="reproduceTypeConstraints" />
       <node concept="3clFbS" id="47tET_WlKzY" role="1nLNMH">
@@ -11844,6 +11968,78 @@
         </node>
       </node>
     </node>
+    <node concept="3AqmO8" id="47tET_WgaZR" role="8PkJo">
+      <property role="TrG5h" value="checkAllConstraints" />
+      <node concept="1zAUYm" id="47tET_WgaZY" role="1zAUyy">
+        <property role="TrG5h" value="typeVars" />
+      </node>
+      <node concept="1zAUYm" id="47tET_Wgb00" role="1zAUyy">
+        <property role="TrG5h" value="originalTypeVars" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_Wgb9$" role="8PkJo">
+      <property role="TrG5h" value="checkVarConstraints" />
+      <node concept="1zAUYm" id="47tET_Wgb9V" role="1zAUyy">
+        <property role="TrG5h" value="type" />
+      </node>
+      <node concept="1zAUYm" id="47tET_Wgb9Z" role="1zAUyy">
+        <property role="TrG5h" value="typeConstraintsSet" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_Wh9Mr" role="8PkJo">
+      <property role="TrG5h" value="strengthCheck" />
+      <node concept="1zAUYm" id="47tET_Wh9MH" role="1zAUyy">
+        <property role="TrG5h" value="weakerSet" />
+      </node>
+      <node concept="1zAUYm" id="47tET_Wh9MJ" role="1zAUyy">
+        <property role="TrG5h" value="strongerSet" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_Wh6jP" role="8PkJo">
+      <property role="TrG5h" value="instanceCheck" />
+      <node concept="1zAUYm" id="47tET_Wh6k4" role="1zAUyy">
+        <property role="TrG5h" value="type" />
+      </node>
+      <node concept="1zAUYm" id="47tET_Wh6k6" role="1zAUyy">
+        <property role="TrG5h" value="typeConstraintSet" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_WsEug" role="8PkJo">
+      <property role="TrG5h" value="instanceCheckHelper" />
+      <node concept="1zAUYm" id="47tET_WsEuA" role="1zAUyy">
+        <property role="TrG5h" value="type" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WsEuC" role="1zAUyy">
+        <property role="TrG5h" value="typeConstraintList" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_WsED9" role="8PkJo">
+      <property role="TrG5h" value="checkSingleInstance" />
+      <node concept="1zAUYm" id="47tET_WsED_" role="1zAUyy">
+        <property role="TrG5h" value="type" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WsEDB" role="1zAUyy">
+        <property role="TrG5h" value="typeConstraint" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_WFhSG" role="8PkJo">
+      <property role="TrG5h" value="discardIfInstanceFound" />
+      <node concept="1zAUYm" id="47tET_WFhTd" role="1zAUyy">
+        <property role="TrG5h" value="type" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WFhTb" role="1zAUyy">
+        <property role="TrG5h" value="instantiatedTypeScheme" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="47tET_WsEA7" role="8PkJo">
+      <property role="TrG5h" value="instance" />
+      <node concept="1zAUYm" id="47tET_WsEAw" role="1zAUyy">
+        <property role="TrG5h" value="typeclassPtr" />
+      </node>
+      <node concept="1zAUYm" id="47tET_WsEAy" role="1zAUyy">
+        <property role="TrG5h" value="instanceTypeScheme" />
+      </node>
+    </node>
     <node concept="1nLNMY" id="47tET_WgaXg" role="1nK1Vg">
       <property role="TrG5h" value="checkConstraints" />
       <node concept="3clFbS" id="47tET_WgaXh" role="1nLNMH">
@@ -11895,7 +12091,7 @@
               <node concept="3I6sU6" id="47tET_Wgb2a" role="3Ip0Jz">
                 <node concept="3I6s7M" id="47tET_Wgb2b" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_Wgb2c" role="3I6s78">
-                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkAllConstraints" />
+                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkConstraints" />
                     <node concept="1HFMs5" id="47tET_Wgb2d" role="3AunhB">
                       <node concept="a7P8L" id="47tET_Wgb2e" role="1uarlU">
                         <ref role="a7OzE" node="47tET_Wgb0b" resolve="ITVs" />
@@ -11985,12 +12181,6 @@
                 <node concept="3I6s7M" id="47tET_Wgba5" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_Wgba4" role="3I6s78">
                     <ref role="3AqCNq" node="47tET_Wgb9$" resolve="checkVarConstraints" />
-                    <node concept="a7P8L" id="47tET_Wgbad" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_Wgb0B" resolve="TV" />
-                    </node>
-                    <node concept="a7P8L" id="47tET_Wgbaj" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_Wgb5w" resolve="S" />
-                    </node>
                     <node concept="a7P8L" id="47tET_Wgbay" role="3AunhB">
                       <ref role="a7OzE" node="47tET_Wgb0K" resolve="ITV" />
                     </node>
@@ -12001,7 +12191,7 @@
                 </node>
                 <node concept="3I6s7M" id="47tET_WgbaW" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_WgbaU" role="3I6s78">
-                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkAllConstraints" />
+                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkConstraints" />
                     <node concept="a7P8L" id="47tET_Wgbb7" role="3AunhB">
                       <ref role="a7OzE" node="47tET_Wgb1c" resolve="ITVsTail" />
                     </node>
@@ -12045,7 +12235,7 @@
               <node concept="3I6sU6" id="47tET_Wgbf0" role="3Ip0Jz">
                 <node concept="3I6s7M" id="47tET_Wgbf4" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_Wgbf3" role="3I6s78">
-                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkAllConstraints" />
+                    <ref role="3AqCNq" node="47tET_WgaZR" resolve="checkConstraints" />
                     <node concept="ns1u0" id="47tET_Wgbf9" role="3AunhB">
                       <ref role="ns1xF" node="48ZGLP7pl6N" resolve="Nil" />
                     </node>
@@ -12059,11 +12249,6 @@
           </node>
         </node>
         <node concept="3clFbH" id="47tET_Wgbn6" role="3cqZAp" />
-        <node concept="3SKdUt" id="47tET_Wh602" role="3cqZAp">
-          <node concept="3SKdUq" id="47tET_Wh604" role="3SKWNk">
-            <property role="3SKdUp" value="Free variable potentially gathered additional Constraints during type inference" />
-          </node>
-        </node>
         <node concept="1X3_iC" id="47tET_WsCXk" role="lGtFl">
           <property role="3V$3am" value="statement" />
           <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
@@ -12091,14 +12276,7 @@
                 </node>
               </node>
               <node concept="3Aq9E8" id="47tET_WgbrY" role="1nLNMd">
-                <node concept="3I6sU6" id="47tET_WgbrZ" role="3Ip0Jz">
-                  <node concept="3I6s7M" id="47tET_WsCIX" role="3I6sU7">
-                    <node concept="3Aqt3T" id="47tET_WsCIW" role="3I6s78">
-                      <ref role="3AqCNq" node="47tET_Wh9Mr" resolve="strengthCheck" />
-                      <node concept="aYkH2" id="47tET_WsCJ7" role="3AunhB" />
-                    </node>
-                  </node>
-                </node>
+                <node concept="3I6sU6" id="47tET_WgbrZ" role="3Ip0Jz" />
               </node>
               <node concept="3Aq9_M" id="47tET_Wgbs4" role="1nLNMa">
                 <node concept="3I6sU6" id="47tET_Wgbs5" role="3Ip0Jz">
@@ -12132,12 +12310,6 @@
                 <node concept="3I6s7M" id="47tET_Wh5pc" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_Wh5pd" role="3I6s78">
                     <ref role="3AqCNq" node="47tET_Wgb9$" resolve="checkVarConstraints" />
-                    <node concept="a7P8L" id="47tET_Wh5pe" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_Wgb0B" resolve="TV" />
-                    </node>
-                    <node concept="a7P8L" id="47tET_Wh5pf" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_Wgb5w" resolve="S" />
-                    </node>
                     <node concept="1HFMs5" id="47tET_Wh5sg" role="3AunhB">
                       <node concept="a7P8L" id="47tET_Wh5pg" role="1uarlU">
                         <ref role="a7OzE" node="47tET_Wgb0K" resolve="ITV" />
@@ -12239,12 +12411,6 @@
                 <node concept="3I6s7M" id="47tET_Wh5yY" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_Wh5yZ" role="3I6s78">
                     <ref role="3AqCNq" node="47tET_Wgb9$" resolve="checkVarConstraints" />
-                    <node concept="a7P8L" id="47tET_Wh5z0" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_Wgb0B" resolve="TV" />
-                    </node>
-                    <node concept="a7P8L" id="47tET_Wh5z1" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_Wgb5w" resolve="S" />
-                    </node>
                     <node concept="a7P8L" id="47tET_Wh5z2" role="3AunhB">
                       <ref role="a7OzE" node="47tET_Wgb0K" resolve="ITV" />
                     </node>
@@ -12367,6 +12533,11 @@
     <node concept="1nLNMY" id="47tET_WsElx" role="1nK1Vg">
       <property role="TrG5h" value="instanceCheck" />
       <node concept="3clFbS" id="47tET_WsEly" role="1nLNMH">
+        <node concept="3SKdUt" id="47tET_WwVJN" role="3cqZAp">
+          <node concept="3SKdUq" id="47tET_WwVJP" role="3SKWNk">
+            <property role="3SKdUp" value="Note: setToCons removes the set -- discharges satisfied constraints" />
+          </node>
+        </node>
         <node concept="1nLNNL" id="47tET_WsErN" role="3cqZAp">
           <node concept="1nLNMm" id="47tET_WsErO" role="1nLNNK">
             <node concept="0eUR_" id="47tET_WsErS" role="0UC6o">
@@ -12470,32 +12641,14 @@
               <node concept="3I6sU6" id="47tET_WsEyj" role="3Ip0Jz">
                 <node concept="3IrJb3" id="47tET_WsEJB" role="3I6sU7">
                   <node concept="3clFbS" id="47tET_WsEJC" role="3IrJb0">
-                    <node concept="3Aqczg" id="47tET_WsEJD" role="3cqZAp">
-                      <node concept="3A8Hvi" id="47tET_WsEHq" role="3Aqpz8">
-                        <node concept="a7P8L" id="47tET_WsEOB" role="3A8wtg">
-                          <ref role="a7OzE" node="47tET_WsENT" resolve="Ctr" />
-                        </node>
-                        <node concept="ns1u0" id="47tET_WsEHI" role="3A8w4Q">
-                          <ref role="ns1xF" node="3vXKzDNDVgC" resolve="Constraint" />
-                          <node concept="nsMwS" id="47tET_WsEHK" role="ns1xD">
-                            <ref role="nsMwP" node="47tET_W4Sc3" resolve="typeclass" />
-                            <node concept="1nq8_$" id="47tET_WsEHQ" role="nsMwV">
-                              <node concept="a7P8L" id="47tET_WsEHO" role="1nq8_t">
-                                <ref role="a7OzE" node="47tET_WsEB1" resolve="TcPtr" />
-                              </node>
-                            </node>
-                          </node>
-                        </node>
-                      </node>
-                    </node>
-                    <node concept="3Aqczg" id="47tET_WsEJE" role="3cqZAp">
-                      <node concept="3Aqt3T" id="47tET_WsEIy" role="3Aqpz8">
+                    <node concept="3Aqczg" id="47tET_W_5$i" role="3cqZAp">
+                      <node concept="3Aqt3T" id="47tET_W_5$j" role="3Aqpz8">
                         <ref role="3AqCNq" node="47tET_WsED9" resolve="checkSingleInstance" />
-                        <node concept="a7P8L" id="47tET_WsEJ0" role="3AunhB">
+                        <node concept="a7P8L" id="47tET_W_5$k" role="3AunhB">
                           <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
                         </node>
-                        <node concept="a7P8L" id="47tET_WsEJu" role="3AunhB">
-                          <ref role="a7OzE" node="47tET_WsEB1" resolve="TcPtr" />
+                        <node concept="a7P8L" id="47tET_W_5_O" role="3AunhB">
+                          <ref role="a7OzE" node="47tET_WsENT" resolve="Ctr" />
                         </node>
                       </node>
                     </node>
@@ -12510,6 +12663,43 @@
                         </node>
                       </node>
                     </node>
+                    <node concept="1X3_iC" id="47tET_W_5tK" role="lGtFl">
+                      <property role="3V$3am" value="statement" />
+                      <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
+                      <node concept="3Aqczg" id="47tET_WsEJD" role="8Wnug">
+                        <node concept="3A8Hvi" id="47tET_WsEHq" role="3Aqpz8">
+                          <node concept="a7P8L" id="47tET_WsEOB" role="3A8wtg">
+                            <ref role="a7OzE" node="47tET_WsENT" resolve="Ctr" />
+                          </node>
+                          <node concept="ns1u0" id="47tET_WsEHI" role="3A8w4Q">
+                            <ref role="ns1xF" node="3vXKzDNDVgC" resolve="Constraint" />
+                            <node concept="nsMwS" id="47tET_WsEHK" role="ns1xD">
+                              <ref role="nsMwP" node="47tET_W4Sc3" resolve="typeclass" />
+                              <node concept="1nq8_$" id="47tET_WsEHQ" role="nsMwV">
+                                <node concept="a7P8L" id="47tET_WsEHO" role="1nq8_t">
+                                  <ref role="a7OzE" node="47tET_WsEB1" resolve="TcPtr" />
+                                </node>
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="1X3_iC" id="47tET_W_5uL" role="lGtFl">
+                      <property role="3V$3am" value="statement" />
+                      <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
+                      <node concept="3Aqczg" id="47tET_WsEJE" role="8Wnug">
+                        <node concept="3Aqt3T" id="47tET_WsEIy" role="3Aqpz8">
+                          <ref role="3AqCNq" node="47tET_WsED9" resolve="checkSingleInstance" />
+                          <node concept="a7P8L" id="47tET_WsEJ0" role="3AunhB">
+                            <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
+                          </node>
+                          <node concept="a7P8L" id="47tET_WsEJu" role="3AunhB">
+                            <ref role="a7OzE" node="47tET_WsEB1" resolve="TcPtr" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
                   </node>
                 </node>
               </node>
@@ -12548,8 +12738,8 @@
                     <node concept="a7P8L" id="47tET_WsELS" role="3AunhB">
                       <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
                     </node>
-                    <node concept="a7P8L" id="47tET_WsEM0" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_WsEB1" resolve="TcPtr" />
+                    <node concept="a7P8L" id="47tET_W_5B5" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WsENT" resolve="Ctr" />
                     </node>
                   </node>
                 </node>
@@ -12561,8 +12751,8 @@
                 <node concept="3I6s7M" id="47tET_WsEAS" role="3I6sU7">
                   <node concept="3Aqt3T" id="47tET_WsEAR" role="3I6s78">
                     <ref role="3AqCNq" node="47tET_WsEA7" resolve="instance" />
-                    <node concept="a7P8L" id="47tET_WsEBP" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_WsEB1" resolve="TcPtr" />
+                    <node concept="a7P8L" id="47tET_W_5Bn" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WsENT" resolve="Ctr" />
                     </node>
                     <node concept="a7P8L" id="47tET_WsEBX" role="3AunhB">
                       <ref role="a7OzE" node="47tET_WsEBd" resolve="InstTypeScheme" />
@@ -12576,18 +12766,38 @@
                 <node concept="aZer4" id="47tET_WsEBd" role="3XD1gS">
                   <property role="TrG5h" value="InstTypeScheme" />
                 </node>
+                <node concept="aZer4" id="47tET_WE8Qa" role="3XD1gS">
+                  <property role="TrG5h" value="I" />
+                </node>
+                <node concept="aZer4" id="47tET_WE9ff" role="3XD1gS">
+                  <property role="TrG5h" value="ITVs" />
+                </node>
               </node>
             </node>
             <node concept="3Aq9E8" id="47tET_WsEMl" role="1nLNMd">
               <node concept="3I6sU6" id="47tET_WsEMm" role="3Ip0Jz">
-                <node concept="3I6s7M" id="47tET_WsEMq" role="3I6sU7">
-                  <node concept="3Aqt3T" id="47tET_WsEMp" role="3I6s78">
-                    <ref role="3AqCNq" node="48ZGLP8pG4u" resolve="subsumed" />
-                    <node concept="a7P8L" id="47tET_WsEMv" role="3AunhB">
+                <node concept="3I6s7M" id="47tET_WE8VX" role="3I6sU7">
+                  <node concept="3Aqt3T" id="47tET_WE8VW" role="3I6s78">
+                    <ref role="3AqCNq" node="12dHl3ZCEx3" resolve="inst" />
+                    <node concept="a7P8L" id="47tET_WE9f2" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WE8Qa" resolve="I" />
+                    </node>
+                    <node concept="a7P8L" id="47tET_WE9f8" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WsEBd" resolve="InstTypeScheme" />
+                    </node>
+                    <node concept="a7P8L" id="47tET_WE9fJ" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WE9ff" resolve="ITVs" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="3I6s7M" id="47tET_WE9g3" role="3I6sU7">
+                  <node concept="3Aqt3T" id="47tET_WFhTg" role="3I6s78">
+                    <ref role="3AqCNq" node="47tET_WFhSG" resolve="discardIfInstanceFound" />
+                    <node concept="a7P8L" id="47tET_WFhTl" role="3AunhB">
                       <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
                     </node>
-                    <node concept="a7P8L" id="47tET_WsEMB" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_WsEBd" resolve="InstTypeScheme" />
+                    <node concept="a7P8L" id="47tET_WFhTt" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WE8Qa" resolve="I" />
                     </node>
                   </node>
                 </node>
@@ -12596,6 +12806,61 @@
           </node>
         </node>
         <node concept="3clFbH" id="47tET_WsEP0" role="3cqZAp" />
+        <node concept="1nLNNL" id="47tET_WFhPa" role="3cqZAp">
+          <node concept="1nLNMm" id="47tET_WFhPc" role="1nLNNK">
+            <node concept="3Aq93q" id="47tET_WFhRe" role="1nLNMb">
+              <node concept="3I6sU6" id="47tET_WFhRf" role="3Ip0Jz">
+                <node concept="3I6s7M" id="47tET_WFhRj" role="3I6sU7">
+                  <node concept="3Aqt3T" id="47tET_WFhRi" role="3I6s78">
+                    <ref role="3AqCNq" node="47tET_WsED9" resolve="checkSingleInstance" />
+                    <node concept="a7P8L" id="47tET_WFhRo" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
+                    </node>
+                    <node concept="a7P8L" id="47tET_WFhRw" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WsENT" resolve="Ctr" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq93q" id="47tET_WFhTz" role="1nLNMb">
+              <node concept="3I6sU6" id="47tET_WFhT$" role="3Ip0Jz">
+                <node concept="3I6s7M" id="47tET_WFhTI" role="3I6sU7">
+                  <node concept="3Aqt3T" id="47tET_WFhTH" role="3I6s78">
+                    <ref role="3AqCNq" node="47tET_WFhSG" resolve="discardIfInstanceFound" />
+                    <node concept="a7P8L" id="47tET_WFhTN" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
+                    </node>
+                    <node concept="a7P8L" id="47tET_WFhTV" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WE8Qa" resolve="I" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3Aq9_M" id="47tET_WFhRX" role="1nLNMa">
+              <node concept="3I6sU6" id="47tET_WFhRY" role="3Ip0Jz">
+                <node concept="3I6s7M" id="47tET_WFhS4" role="3I6sU7">
+                  <node concept="3A8Hvi" id="47tET_WFhS1" role="3I6s78">
+                    <node concept="a7P8L" id="47tET_WFhS9" role="3A8wtg">
+                      <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
+                    </node>
+                    <node concept="a7P8L" id="47tET_WFhU1" role="3A8w4Q">
+                      <ref role="a7OzE" node="47tET_WE8Qa" resolve="I" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbH" id="47tET_WGovI" role="3cqZAp" />
+        <node concept="3clFbH" id="47tET_WGoos" role="3cqZAp" />
+        <node concept="3SKdUt" id="47tET_WE8NB" role="3cqZAp">
+          <node concept="3SKdUq" id="47tET_WE8ND" role="3SKWNk">
+            <property role="3SKdUp" value="No instance candidates left -- fail" />
+          </node>
+        </node>
         <node concept="1nLNNL" id="47tET_WsES3" role="3cqZAp">
           <node concept="1nLNMm" id="47tET_WsES5" role="1nLNNK">
             <node concept="3Aq93q" id="47tET_WsETD" role="1nLNMb">
@@ -12606,8 +12871,8 @@
                     <node concept="a7P8L" id="47tET_WsETN" role="3AunhB">
                       <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
                     </node>
-                    <node concept="a7P8L" id="47tET_WsETV" role="3AunhB">
-                      <ref role="a7OzE" node="47tET_WsEB1" resolve="TcPtr" />
+                    <node concept="a7P8L" id="47tET_W_5AI" role="3AunhB">
+                      <ref role="a7OzE" node="47tET_WsENT" resolve="Ctr" />
                     </node>
                   </node>
                 </node>
@@ -12624,6 +12889,29 @@
             </node>
           </node>
         </node>
+        <node concept="1X3_iC" id="47tET_WGoyR" role="lGtFl">
+          <property role="3V$3am" value="statement" />
+          <property role="3V$3ak" value="f3061a53-9226-4cc5-a443-f952ceaf5816/1068580123136/1068581517665" />
+          <node concept="1nLNNL" id="47tET_WGolG" role="8Wnug">
+            <node concept="1nLNMm" id="47tET_WGolI" role="1nLNNK">
+              <node concept="3Aq93q" id="47tET_WGoo3" role="1nLNMb">
+                <node concept="3I6sU6" id="47tET_WGoo4" role="3Ip0Jz">
+                  <node concept="3I6s7M" id="47tET_WGoo8" role="3I6sU7">
+                    <node concept="3Aqt3T" id="47tET_WGoo7" role="3I6s78">
+                      <ref role="3AqCNq" node="47tET_WFhSG" resolve="discardIfInstanceFound" />
+                      <node concept="a7P8L" id="47tET_WGood" role="3AunhB">
+                        <ref role="a7OzE" node="47tET_WsErV" resolve="Type" />
+                      </node>
+                      <node concept="a7P8L" id="47tET_WGool" role="3AunhB">
+                        <ref role="a7OzE" node="47tET_WE8Qa" resolve="I" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
       </node>
     </node>
   </node>
diff --git a/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps b/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps
index aadb41b4..d80f68cc 100644
--- a/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps
+++ b/samples/lambdacalc/solutions/samples.lambdacalc.demo/models/samples.lambdacalc.demo.mps
@@ -90,7 +90,7 @@
       </concept>
       <concept id="3245170173553595892" name="samples.lambdacalc.structure.Instance" flags="ng" index="1FkZNw">
         <reference id="3245170173553595906" name="typeclass" index="1FkZWm" />
-        <child id="3245170173553595893" name="type" index="1FkZNx" />
+        <child id="3245170173553595893" name="typeScheme" index="1FkZNx" />
         <child id="3245170173553595895" name="impls" index="1FkZNz" />
       </concept>
       <concept id="3245170173553595898" name="samples.lambdacalc.structure.PrototypeImpl" flags="ng" index="1FkZNI">
@@ -3848,13 +3848,158 @@
         </node>
       </node>
     </node>
+    <node concept="1DVJbV" id="47tET_Whar6" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_Whar7" role="j9CMd">
+        <node concept="1DVIrU" id="47tET_Whar8" role="1DVIrD">
+          <node concept="1DVIrB" id="47tET_Whar9" role="1DVIr_">
+            <node concept="1DVIoH" id="47tET_Whara" role="1DVIrA">
+              <property role="TrG5h" value="x" />
+            </node>
+          </node>
+          <node concept="1DVIrU" id="47tET_Wharb" role="1DVIrw">
+            <node concept="1DVIrB" id="47tET_Wharc" role="1DVIr_">
+              <node concept="3TPQf" id="47tET_Whard" role="1DVIrA">
+                <node concept="1DVIoH" id="47tET_Whare" role="3TPQ0">
+                  <property role="TrG5h" value="g" />
+                </node>
+                <node concept="3JbUGG" id="47tET_Wharf" role="3TPQk">
+                  <node concept="1jz_ff" id="47tET_Wharg" role="3JbKvY">
+                    <node concept="3EVAj" id="47tET_Wharh" role="1jz_f_">
+                      <node concept="aFS0r" id="47tET_Whari" role="3EVAi">
+                        <ref role="aFS0e" node="47tET_Wharl" resolve="b" />
+                      </node>
+                      <node concept="aFS0r" id="47tET_WhaFh" role="3EVAk">
+                        <ref role="aFS0e" node="47tET_WhaFc" resolve="c" />
+                      </node>
+                    </node>
+                    <node concept="aFS0r" id="47tET_Whark" role="1jz_fp">
+                      <ref role="aFS0e" node="47tET_Wharl" resolve="b" />
+                    </node>
+                  </node>
+                  <node concept="2BbKIm" id="47tET_Wharl" role="5lUUh">
+                    <property role="TrG5h" value="b" />
+                  </node>
+                  <node concept="2BbKIm" id="47tET_WhaFc" role="5lUUh">
+                    <property role="TrG5h" value="c" />
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="3EUms" id="47tET_Wharm" role="1DVIrw">
+              <node concept="1DVIo5" id="47tET_Wharn" role="3EUmv">
+                <node concept="3P8L2H" id="47tET_Wharp" role="1DVIo8" />
+                <node concept="3TPRf" id="47tET_WhaFm" role="1DVIo4">
+                  <node concept="t0$VC" id="47tET_WhaFn" role="3TPR0">
+                    <ref role="t0$VJ" node="47tET_Whard" resolve="g" />
+                  </node>
+                  <node concept="3JbUGG" id="47tET_WhaFo" role="3TPQk">
+                    <node concept="1jz_ff" id="47tET_WhaFp" role="3JbKvY">
+                      <node concept="aFS0r" id="47tET_WhaFq" role="1jz_fp">
+                        <ref role="aFS0e" node="47tET_WhaFu" resolve="d" />
+                      </node>
+                      <node concept="3EVAj" id="47tET_WhaFr" role="1jz_f_">
+                        <node concept="aFS0r" id="47tET_WhaFs" role="3EVAi">
+                          <ref role="aFS0e" node="47tET_WhaFu" resolve="d" />
+                        </node>
+                        <node concept="aFS0r" id="47tET_WhaFE" role="3EVAk">
+                          <ref role="aFS0e" node="47tET_WharP" resolve="a" />
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="2BbKIm" id="47tET_WhaFu" role="5lUUh">
+                      <property role="TrG5h" value="d" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1DVIo5" id="47tET_Wharq" role="3EUmh">
+                <node concept="t0$VC" id="47tET_Wharr" role="1DVIo4">
+                  <ref role="t0$VJ" node="47tET_Whard" resolve="g" />
+                </node>
+                <node concept="3EUms" id="47tET_Whars" role="1DVIo8">
+                  <node concept="3P8MHP" id="47tET_Whart" role="3EUmv" />
+                  <node concept="3P8MHP" id="47tET_Wharu" role="3EUmh" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3TPQf" id="47tET_Wharv" role="1DVIrJ">
+          <node concept="1DVIoH" id="47tET_Wharw" role="3TPQ0">
+            <property role="TrG5h" value="qq_lb4" />
+          </node>
+          <node concept="3JbUGG" id="47tET_Wharx" role="3TPQk">
+            <node concept="1jz_ff" id="47tET_Whary" role="3JbKvY">
+              <node concept="aFS0r" id="47tET_Wharz" role="1jz_fp">
+                <ref role="aFS0e" node="47tET_WharP" resolve="a" />
+              </node>
+              <node concept="1jz_ff" id="47tET_Whar$" role="1jz_f_">
+                <node concept="3EVAj" id="47tET_Whar_" role="1jz_f_">
+                  <node concept="3EVAj" id="47tET_WharA" role="3EVAk">
+                    <node concept="aFS0r" id="47tET_WharB" role="3EVAk">
+                      <ref role="aFS0e" node="47tET_WharP" resolve="a" />
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+                    <node concept="3P8Jbz" id="47tET_WharC" role="3EVAi" />
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+                  <node concept="3EVAj" id="47tET_WharD" role="3EVAi">
+                    <node concept="aFS0r" id="47tET_WharE" role="3EVAk">
+                      <ref role="aFS0e" node="47tET_WharP" resolve="a" />
+                    </node>
+                    <node concept="3EVAj" id="47tET_WharF" role="3EVAi">
+                      <node concept="3P8Jbz" id="47tET_WharG" role="3EVAk" />
+                      <node concept="3P8Jbz" id="47tET_WharH" role="3EVAi" />
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+                </node>
+                <node concept="3JbUGG" id="47tET_WharI" role="1jz_fp">
+                  <node concept="2BbKIm" id="47tET_WharJ" role="5lUUh">
+                    <property role="TrG5h" value="b" />
+                  </node>
+                  <node concept="2BbKIm" id="47tET_WhaOj" role="5lUUh">
+                    <property role="TrG5h" value="c" />
+                  </node>
+                  <node concept="1jz_ff" id="47tET_WharK" role="3JbKvY">
+                    <node concept="aFS0r" id="47tET_WharL" role="1jz_fp">
+                      <ref role="aFS0e" node="47tET_WharJ" resolve="b" />
+                    </node>
+                    <node concept="3EVAj" id="47tET_WharM" role="1jz_f_">
+                      <node concept="aFS0r" id="47tET_WharO" role="3EVAi">
+                        <ref role="aFS0e" node="47tET_WharJ" resolve="b" />
+                      </node>
+                      <node concept="aFS0r" id="47tET_WhaOo" role="3EVAk">
+                        <ref role="aFS0e" node="47tET_WhaOj" resolve="c" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="2BbKIm" id="47tET_WharP" role="5lUUh">
+              <property role="TrG5h" value="a" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
   </node>
   <node concept="1DVIrt" id="2O9ahh6x9Cb">
-    <property role="TrG5h" value="Typeclasses" />
+    <property role="TrG5h" value="DemoConstraints" />
+    <node concept="1FkZNM" id="47tET_Wha9b" role="1DVIru">
+      <property role="TrG5h" value="C1" />
+      <node concept="2BbKIm" id="47tET_Wha9d" role="1FkZN_">
+        <property role="TrG5h" value="c1" />
+      </node>
+    </node>
+    <node concept="1FkZNM" id="47tET_Whae3" role="1DVIru">
+      <property role="TrG5h" value="C2" />
+      <node concept="2BbKIm" id="47tET_Whae5" role="1FkZN_">
+        <property role="TrG5h" value="c2" />
+      </node>
+    </node>
     <node concept="1FkZNM" id="2O9ahh6x9Cg" role="1DVIru">
       <property role="TrG5h" value="Monoid" />
       <node concept="2BbKIm" id="2O9ahh6x9Ch" role="1FkZN_">
-        <property role="TrG5h" value="a" />
+        <property role="TrG5h" value="z" />
       </node>
       <node concept="1FkZNY" id="2O9ahh6x9CE" role="1FkZNV">
         <node concept="3TPQf" id="2O9ahh6x9CF" role="1FkZNT">
@@ -3862,7 +4007,7 @@
             <property role="TrG5h" value="mempty" />
           </node>
           <node concept="aFS0r" id="2O9ahh6x9D0" role="3TPQk">
-            <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="a" />
+            <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="z" />
           </node>
         </node>
       </node>
@@ -3873,20 +4018,668 @@
           </node>
           <node concept="1jz_ff" id="2O9ahh6x9D3" role="3TPQk">
             <node concept="aFS0r" id="2O9ahh6x9D5" role="1jz_fp">
-              <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="a" />
+              <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="z" />
             </node>
             <node concept="1jz_ff" id="2O9ahh6x9D7" role="1jz_f_">
               <node concept="aFS0r" id="2O9ahh6x9Db" role="1jz_f_">
-                <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="a" />
+                <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="z" />
               </node>
               <node concept="aFS0r" id="2O9ahh6Eviq" role="1jz_fp">
-                <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="a" />
+                <ref role="aFS0e" node="2O9ahh6x9Ch" resolve="z" />
               </node>
             </node>
           </node>
         </node>
       </node>
     </node>
+    <node concept="1DVJbV" id="47tET_WhdQY" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_WhdR0" role="j9CMd">
+        <node concept="1DVIoH" id="47tET_WhdR2" role="1DVIrJ">
+          <property role="TrG5h" value="cc1" />
+        </node>
+        <node concept="1DVIrU" id="47tET_WhdSP" role="1DVIrD">
+          <node concept="1DVIrB" id="47tET_WhdSQ" role="1DVIr_">
+            <node concept="1DVIoH" id="47tET_WhdSR" role="1DVIrA">
+              <property role="TrG5h" value="x" />
+            </node>
+          </node>
+          <node concept="1DVIo5" id="47tET_WhdTl" role="1DVIrw">
+            <node concept="1DVIo5" id="47tET_WhdTp" role="1DVIo4">
+              <node concept="t0$VC" id="47tET_WhdTt" role="1DVIo4">
+                <ref role="t0$VJ" node="2O9ahh6x9Cr" resolve="mappend" />
+              </node>
+              <node concept="t0$VC" id="47tET_WhdU2" role="1DVIo8">
+                <ref role="t0$VJ" node="47tET_WhdSR" resolve="x" />
+              </node>
+            </node>
+            <node concept="t0$VC" id="47tET_WhdTX" role="1DVIo8">
+              <ref role="t0$VJ" node="47tET_WhdSR" resolve="x" />
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+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="47tET_WsCzY" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_WsCzZ" role="j9CMd">
+        <node concept="1DVIoH" id="47tET_WsC$0" role="1DVIrJ">
+          <property role="TrG5h" value="cc1a_bad" />
+        </node>
+        <node concept="3TPRf" id="47tET_WsC$1" role="1DVIrD">
+          <node concept="1DVIrU" id="47tET_WsC$2" role="3TPR0">
+            <node concept="1DVIrB" id="47tET_WsC$3" role="1DVIr_">
+              <node concept="1DVIoH" id="47tET_WsC$4" role="1DVIrA">
+                <property role="TrG5h" value="x" />
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+            </node>
+            <node concept="1DVIo5" id="47tET_WsC$5" role="1DVIrw">
+              <node concept="1DVIo5" id="47tET_WsC$6" role="1DVIo4">
+                <node concept="t0$VC" id="47tET_WsC$7" role="1DVIo4">
+                  <ref role="t0$VJ" node="2O9ahh6x9Cr" resolve="mappend" />
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+            <node concept="1FkZV4" id="47tET_WsC$b" role="1FkZ4g">
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+              <ref role="1FkZV7" node="47tET_Wha9b" resolve="C1" />
+            </node>
+            <node concept="2BbKIm" id="47tET_WsC$c" role="5lUUh">
+              <property role="TrG5h" value="a" />
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+            <node concept="1jz_ff" id="47tET_WsC$d" role="3JbKvY">
+              <node concept="aFS0r" id="47tET_WsC$e" role="1jz_fp">
+                <ref role="aFS0e" node="47tET_WsC$c" resolve="a" />
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+              <node concept="aFS0r" id="47tET_WsC$f" role="1jz_f_">
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+          </node>
+          <node concept="1U20sH" id="47tET_WwUvE" role="lGtFl">
+            <property role="1U20sK" value="error" />
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+        <node concept="1DVIoH" id="47tET_WsB1q" role="1DVIrJ">
+          <property role="TrG5h" value="cc1a" />
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+              <node concept="1DVIoH" id="47tET_WsB1u" role="1DVIrA">
+                <property role="TrG5h" value="x" />
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+              <node concept="1DVIo5" id="47tET_WsB1w" role="1DVIo4">
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+                <node concept="t0$VC" id="47tET_WsB1y" role="1DVIo8">
+                  <ref role="t0$VJ" node="47tET_WsB1u" resolve="x" />
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+              <node concept="t0$VC" id="47tET_WsB1z" role="1DVIo8">
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+          <node concept="3JbUGG" id="47tET_WsB1$" role="3TPQk">
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+              <ref role="1FkZV7" node="47tET_Wha9b" resolve="C1" />
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+            <node concept="1FkZV4" id="47tET_WsB3J" role="1FkZ4g">
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+            <node concept="2BbKIm" id="47tET_WsB1A" role="5lUUh">
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+              <node concept="aFS0r" id="47tET_WsB1C" role="1jz_fp">
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+        <node concept="1DVIrH" id="47tET_WsCR1" role="1DVIrD">
+          <node concept="1DVIrG" id="47tET_WsCR5" role="1DVIrE">
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+              <node concept="1DVIoH" id="47tET_WsCR7" role="3TPQ0">
+                <property role="TrG5h" value="x" />
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+              <node concept="3JbUGG" id="47tET_WsCR8" role="3TPQk">
+                <node concept="2BbKIm" id="47tET_WsCUa" role="5lUUh">
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+                <node concept="1jz_ff" id="47tET_WsCVf" role="3JbKvY">
+                  <node concept="aFS0r" id="47tET_WsCVh" role="1jz_fp">
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+                  <property role="TrG5h" value="xx" />
+                </node>
+              </node>
+              <node concept="3P8MHP" id="47tET_WsCVr" role="1DVIrw" />
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+          <node concept="1DVIo5" id="47tET_WsCUt" role="1DVIrk">
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+              <node concept="t0$VC" id="47tET_WsCUv" role="1DVIo4">
+                <ref role="t0$VJ" node="2O9ahh6x9Cr" resolve="mappend" />
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+              <node concept="t0$VC" id="47tET_WsCUE" role="1DVIo8">
+                <ref role="t0$VJ" node="47tET_WsCR6" resolve="x" />
+              </node>
+            </node>
+            <node concept="t0$VC" id="47tET_WsCUB" role="1DVIo8">
+              <ref role="t0$VJ" node="47tET_WsCR6" resolve="x" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="47tET_Wha2g" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_Wha2h" role="j9CMd">
+        <node concept="1DVIoH" id="47tET_Wha2i" role="1DVIrJ">
+          <property role="TrG5h" value="cc3" />
+        </node>
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+                    <node concept="2BbKIm" id="47tET_WhdiE" role="5lUUh">
+                      <property role="TrG5h" value="d" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+              <node concept="1DVIo5" id="47tET_WhdiF" role="3EUmh">
+                <node concept="t0$VC" id="47tET_WhdiG" role="1DVIo4">
+                  <ref role="t0$VJ" node="47tET_Whdik" resolve="g" />
+                </node>
+                <node concept="3EUms" id="47tET_WhdiH" role="1DVIo8">
+                  <node concept="3P8MHP" id="47tET_WhdiI" role="3EUmv" />
+                  <node concept="3P8MHP" id="47tET_WhdiJ" role="3EUmh" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3TPQf" id="47tET_WhdiK" role="1DVIrJ">
+          <node concept="1DVIoH" id="47tET_WhdiL" role="3TPQ0">
+            <property role="TrG5h" value="qq_lb4" />
+          </node>
+          <node concept="3JbUGG" id="47tET_WhdiM" role="3TPQk">
+            <node concept="1FkZV4" id="47tET_WhdiN" role="1FkZ4g">
+              <ref role="1FvTW1" node="47tET_Whdj8" resolve="a" />
+              <ref role="1FkZV7" node="47tET_Wha9b" resolve="C1" />
+            </node>
+            <node concept="1jz_ff" id="47tET_WhdiO" role="3JbKvY">
+              <node concept="aFS0r" id="47tET_WhdiP" role="1jz_fp">
+                <ref role="aFS0e" node="47tET_Whdj8" resolve="a" />
+              </node>
+              <node concept="1jz_ff" id="47tET_WhdiQ" role="1jz_f_">
+                <node concept="3EVAj" id="47tET_WhdiR" role="1jz_f_">
+                  <node concept="3EVAj" id="47tET_WhdiS" role="3EVAk">
+                    <node concept="aFS0r" id="47tET_WhdiT" role="3EVAk">
+                      <ref role="aFS0e" node="47tET_Whdj8" resolve="a" />
+                    </node>
+                    <node concept="3P8Jbz" id="47tET_WhdiU" role="3EVAi" />
+                  </node>
+                  <node concept="3EVAj" id="47tET_WhdiV" role="3EVAi">
+                    <node concept="aFS0r" id="47tET_WhdiW" role="3EVAk">
+                      <ref role="aFS0e" node="47tET_Whdj8" resolve="a" />
+                    </node>
+                    <node concept="3EVAj" id="47tET_WhdiX" role="3EVAi">
+                      <node concept="3P8Jbz" id="47tET_WhdiY" role="3EVAk" />
+                      <node concept="3P8Jbz" id="47tET_WhdiZ" role="3EVAi" />
+                    </node>
+                  </node>
+                </node>
+                <node concept="3JbUGG" id="47tET_Whdj0" role="1jz_fp">
+                  <node concept="2BbKIm" id="47tET_Whdj1" role="5lUUh">
+                    <property role="TrG5h" value="b" />
+                  </node>
+                  <node concept="2BbKIm" id="47tET_Whdj2" role="5lUUh">
+                    <property role="TrG5h" value="c" />
+                  </node>
+                  <node concept="1jz_ff" id="47tET_Whdj3" role="3JbKvY">
+                    <node concept="aFS0r" id="47tET_Whdj4" role="1jz_fp">
+                      <ref role="aFS0e" node="47tET_Whdj1" resolve="b" />
+                    </node>
+                    <node concept="3EVAj" id="47tET_Whdj5" role="1jz_f_">
+                      <node concept="aFS0r" id="47tET_Whdj6" role="3EVAi">
+                        <ref role="aFS0e" node="47tET_Whdj1" resolve="b" />
+                      </node>
+                      <node concept="aFS0r" id="47tET_Whdj7" role="3EVAk">
+                        <ref role="aFS0e" node="47tET_Whdj2" resolve="c" />
+                      </node>
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="2BbKIm" id="47tET_Whdj8" role="5lUUh">
+              <property role="TrG5h" value="a" />
+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
     <node concept="1FkZNw" id="2O9ahh6znzy" role="1DVIru">
       <ref role="1FkZWm" node="2O9ahh6x9Cg" resolve="Monoid" />
       <node concept="1FkZNI" id="2O9ahh6Et5O" role="1FkZNz">
@@ -3953,7 +4746,7 @@
       </node>
       <node concept="1FkZNI" id="2O9ahh6Et5S" role="1FkZNz">
         <ref role="1FkZND" node="2O9ahh6x9CE" resolve="mempty" />
-        <node concept="3P8L2H" id="2O9ahh6Evjw" role="1FkZNF" />
+        <node concept="3P8L2H" id="47tET_WAbJL" role="1FkZNF" />
       </node>
       <node concept="3JbUGG" id="2O9ahh6znz$" role="1FkZNx">
         <node concept="3P8Jbz" id="2O9ahh6$Ael" role="3JbKvY" />
@@ -4058,12 +4851,12 @@
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       <node concept="3JbUGG" id="2O9ahh6H2xJ" role="1FkZNx">
         <node concept="1FkZV4" id="47tET_W69wT" role="1FkZ4g">
-          <ref role="1FkZV7" node="2O9ahh6x9Cg" resolve="Monoid" />
           <ref role="1FvTW1" node="2O9ahh6H2yQ" resolve="b" />
+          <ref role="1FkZV7" node="2O9ahh6x9Cg" resolve="Monoid" />
         </node>
         <node concept="1FkZV4" id="2O9ahh6H2yZ" role="1FkZ4g">
-          <ref role="1FkZV7" node="2O9ahh6x9Cg" resolve="Monoid" />
           <ref role="1FvTW1" node="2O9ahh6H2yQ" resolve="b" />
+          <ref role="1FkZV7" node="2O9ahh6x9Cg" resolve="Monoid" />
         </node>
         <node concept="2BbKIm" id="2O9ahh6H2yO" role="5lUUh">
           <property role="TrG5h" value="a" />
@@ -4081,6 +4874,412 @@
         </node>
       </node>
     </node>
+    <node concept="1DVJbV" id="47tET_WwUC8" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_WwUCa" role="j9CMd">
+        <node concept="1DVIoH" id="47tET_WwUCc" role="1DVIrJ">
+          <property role="TrG5h" value="ii1" />
+        </node>
+        <node concept="1DVIo5" id="47tET_WwUI3" role="1DVIrD">
+          <node concept="3P8MHP" id="47tET_WwUId" role="1DVIo8" />
+          <node concept="1DVIo5" id="47tET_WwUIi" role="1DVIo4">
+            <node concept="t0$VC" id="47tET_WwUHW" role="1DVIo4">
+              <ref role="t0$VJ" node="2O9ahh6x9Cr" resolve="mappend" />
+            </node>
+            <node concept="3P8MHP" id="47tET_WwVcg" role="1DVIo8" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="47tET_WwVlm" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_WwVln" role="j9CMd">
+        <node concept="1DVIoH" id="47tET_WwVlo" role="1DVIrJ">
+          <property role="TrG5h" value="ii1_bad" />
+        </node>
+        <node concept="1DVIo5" id="47tET_WwVlp" role="1DVIrD">
+          <node concept="1DVIo5" id="47tET_WwVlq" role="1DVIo4">
+            <node concept="t0$VC" id="47tET_WwVlr" role="1DVIo4">
+              <ref role="t0$VJ" node="2O9ahh6x9Cr" resolve="mappend" />
+            </node>
+            <node concept="3EUms" id="47tET_WwVs8" role="1DVIo8">
+              <node concept="3P8L2H" id="47tET_WwVsa" role="3EUmv" />
+              <node concept="3P8L2H" id="47tET_WwVsc" role="3EUmh" />
+            </node>
+          </node>
+          <node concept="3EUms" id="47tET_WwVs0" role="1DVIo8">
+            <node concept="3P8L2H" id="47tET_WwVs2" role="3EUmv" />
+            <node concept="3P8L2H" id="47tET_WwVs4" role="3EUmh" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="47tET_WwVeW" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_WwVeX" role="j9CMd">
+        <node concept="1DVIoH" id="47tET_WwVeY" role="1DVIrJ">
+          <property role="TrG5h" value="ii2" />
+        </node>
+        <node concept="1DVIo5" id="47tET_WwVeZ" role="1DVIrD">
+          <node concept="1DVIo5" id="47tET_WwVf0" role="1DVIo4">
+            <node concept="t0$VC" id="47tET_WwVf1" role="1DVIo4">
+              <ref role="t0$VJ" node="2O9ahh6x9Cr" resolve="mappend" />
+            </node>
+            <node concept="1DVIrU" id="47tET_WwVf2" role="1DVIo8">
+              <node concept="1DVIrB" id="47tET_WwVf3" role="1DVIr_">
+                <node concept="1DVIoH" id="47tET_WwVf4" role="1DVIrA">
+                  <property role="TrG5h" value="x" />
+                </node>
+              </node>
+              <node concept="3P8MHP" id="47tET_WwVtI" role="1DVIrw" />
+            </node>
+          </node>
+          <node concept="1DVIrU" id="47tET_WwVf6" role="1DVIo8">
+            <node concept="1DVIrB" id="47tET_WwVf7" role="1DVIr_">
+              <node concept="1DVIoH" id="47tET_WwVf8" role="1DVIrA">
+                <property role="TrG5h" value="y" />
+              </node>
+            </node>
+            <node concept="3P8MHP" id="47tET_WwVtN" role="1DVIrw" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1DVJbV" id="47tET_WwV6e" role="1DVIru">
+      <node concept="1DVIrG" id="47tET_WwV6f" role="j9CMd">
+        <node concept="1DVIoH" id="47tET_WwV6g" role="1DVIrJ">
+          <property role="TrG5h" value="ii2_bad" />
+        </node>
+        <node concept="1DVIo5" id="47tET_WwV6h" role="1DVIrD">
+          <node concept="1DVIo5" id="47tET_WwV6j" role="1DVIo4">
+            <node concept="t0$VC" id="47tET_WwV6k" role="1DVIo4">
+              <ref role="t0$VJ" node="2O9ahh6x9Cr" resolve="mappend" />
+            </node>
+            <node concept="1DVIrU" id="47tET_WwVd8" role="1DVIo8">
+              <node concept="1DVIrB" id="47tET_WwVd9" role="1DVIr_">
+                <node concept="1DVIoH" id="47tET_WwVda" role="1DVIrA">
+                  <property role="TrG5h" value="x" />
+                </node>
+              </node>
+              <node concept="t0$VC" id="47tET_WwVde" role="1DVIrw">
+                <ref role="t0$VJ" node="47tET_WwVda" resolve="x" />
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+            </node>
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+          <node concept="1DVIrU" id="47tET_WwVdg" role="1DVIo8">
+            <node concept="1DVIrB" id="47tET_WwVdh" role="1DVIr_">
+              <node concept="1DVIoH" id="47tET_WwVdi" role="1DVIrA">
+                <property role="TrG5h" value="y" />
+              </node>
+            </node>
+            <node concept="t0$VC" id="47tET_WwVdm" role="1DVIrw">
+              <ref role="t0$VJ" node="47tET_WwVdi" resolve="y" />
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+          </node>
+        </node>
+      </node>
+    </node>
+  </node>
+  <node concept="1DVIrt" id="47tET_WGoBb">
+    <property role="TrG5h" value="Typeclasses" />
+    <node concept="1FkZNM" id="47tET_WGoBc" role="1DVIru">
+      <property role="TrG5h" value="Monoid1" />
+      <node concept="2BbKIm" id="47tET_WGoBd" role="1FkZN_">
+        <property role="TrG5h" value="z" />
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+      <node concept="1FkZNY" id="47tET_WGoBe" role="1FkZNV">
+        <node concept="3TPQf" id="47tET_WGoBf" role="1FkZNT">
+          <node concept="1DVIoH" id="47tET_WGoBg" role="3TPQ0">
+            <property role="TrG5h" value="mempty" />
+          </node>
+          <node concept="aFS0r" id="47tET_WGoBh" role="3TPQk">
+            <ref role="aFS0e" node="47tET_WGoBd" resolve="z" />
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+      <node concept="1FkZNY" id="47tET_WGoBi" role="1FkZNV">
+        <node concept="3TPQf" id="47tET_WGoBj" role="1FkZNT">
+          <node concept="1DVIoH" id="47tET_WGoBk" role="3TPQ0">
+            <property role="TrG5h" value="mappend" />
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+          <node concept="1jz_ff" id="47tET_WGoBl" role="3TPQk">
+            <node concept="aFS0r" id="47tET_WGoBm" role="1jz_fp">
+              <ref role="aFS0e" node="47tET_WGoBd" resolve="z" />
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+            <node concept="1jz_ff" id="47tET_WGoBn" role="1jz_f_">
+              <node concept="aFS0r" id="47tET_WGoBo" role="1jz_f_">
+                <ref role="aFS0e" node="47tET_WGoBd" resolve="z" />
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+              <node concept="aFS0r" id="47tET_WGoBp" role="1jz_fp">
+                <ref role="aFS0e" node="47tET_WGoBd" resolve="z" />
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+            </node>
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1FkZNw" id="47tET_WGoBC" role="1DVIru">
+      <ref role="1FkZWm" node="47tET_WGoBc" resolve="Monoid1" />
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+        <ref role="1FkZND" node="47tET_WGoBi" resolve="mappend" />
+        <node concept="1DVIrU" id="47tET_WGoBE" role="1FkZNF">
+          <node concept="1DVIrB" id="47tET_WGoBF" role="1DVIr_">
+            <node concept="1DVIoH" id="47tET_WGoBG" role="1DVIrA">
+              <property role="TrG5h" value="a" />
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+          <node concept="1DVIrU" id="47tET_WGoBH" role="1DVIrw">
+            <node concept="1DVIrB" id="47tET_WGoBI" role="1DVIr_">
+              <node concept="1DVIoH" id="47tET_WGoBJ" role="1DVIrA">
+                <property role="TrG5h" value="b" />
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+            </node>
+            <node concept="1DVIrH" id="47tET_WGoBK" role="1DVIrw">
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+                <node concept="t0$VC" id="47tET_WGoBM" role="1DVIo8">
+                  <ref role="t0$VJ" node="47tET_WGoBJ" resolve="b" />
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+                <node concept="1DVIo5" id="47tET_WGoBN" role="1DVIo4">
+                  <node concept="t0$VC" id="47tET_WGoBO" role="1DVIo8">
+                    <ref role="t0$VJ" node="47tET_WGoBG" resolve="a" />
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+                  <node concept="t0$VC" id="47tET_WGoBP" role="1DVIo4">
+                    <ref role="t0$VJ" node="47tET_WGoBR" resolve="and" />
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+              </node>
+              <node concept="1DVIrG" id="47tET_WGoBQ" role="1DVIrE">
+                <node concept="1DVIoH" id="47tET_WGoBR" role="1DVIrJ">
+                  <property role="TrG5h" value="and" />
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+                        <property role="TrG5h" value="b" />
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+                    <node concept="FlqVS" id="47tET_WGoBY" role="1DVIrw">
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+          <node concept="t0$VC" id="47tET_WGoIz" role="3EUmh">
+            <ref role="t0$VJ" node="47tET_WGoBf" resolve="mempty" />
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+          <ref role="1FkZV7" node="47tET_WGoBc" resolve="Monoid1" />
+          <ref role="1FvTW1" node="47tET_WGoIb" resolve="a1" />
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+        <node concept="2BbKIm" id="47tET_WGoIb" role="5lUUh">
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+        <node concept="2BbKIm" id="47tET_WGoId" role="5lUUh">
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+        <node concept="3EVAj" id="47tET_WGoIl" role="3JbKvY">
+          <node concept="aFS0r" id="47tET_WGoIn" role="3EVAk">
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+          <node concept="aFS0r" id="47tET_WGoIp" role="3EVAi">
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+      <ref role="1FkZWm" node="47tET_WGoBc" resolve="Monoid1" />
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+          <node concept="t0$VC" id="47tET_WJNts" role="3EUmv">
+            <ref role="t0$VJ" node="47tET_WGoBf" resolve="mempty" />
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+          <node concept="t0$VC" id="47tET_WJNtt" role="3EUmh">
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+          <ref role="1FkZV7" node="47tET_WGoBc" resolve="Monoid1" />
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+        <node concept="1FkZV4" id="47tET_WJNvo" role="1FkZ4g">
+          <ref role="1FkZV7" node="47tET_WGoBc" resolve="Monoid1" />
+          <ref role="1FvTW1" node="47tET_WJNtx" resolve="b2" />
+        </node>
+        <node concept="2BbKIm" id="47tET_WJNtw" role="5lUUh">
+          <property role="TrG5h" value="a2" />
+        </node>
+        <node concept="2BbKIm" id="47tET_WJNtx" role="5lUUh">
+          <property role="TrG5h" value="b2" />
+        </node>
+        <node concept="3EVAj" id="47tET_WJNty" role="3JbKvY">
+          <node concept="aFS0r" id="47tET_WJNtz" role="3EVAk">
+            <ref role="aFS0e" node="47tET_WJNtw" resolve="a2" />
+          </node>
+          <node concept="aFS0r" id="47tET_WJNt$" role="3EVAi">
+            <ref role="aFS0e" node="47tET_WJNtx" resolve="b2" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="1FkZNw" id="47tET_WGoC6" role="1DVIru">
+      <ref role="1FkZWm" node="47tET_WGoBc" resolve="Monoid1" />
+      <node concept="1FkZNI" id="47tET_WGoC7" role="1FkZNz">
+        <ref role="1FkZND" node="47tET_WGoBe" resolve="mempty" />
+        <node concept="1DVIrU" id="47tET_WGoC8" role="1FkZNF">
+          <node concept="1DVIrB" id="47tET_WGoC9" role="1DVIr_">
+            <node concept="3TPQf" id="47tET_WGoCa" role="1DVIrA">
+              <node concept="1DVIoH" id="47tET_WGoCb" role="3TPQ0">
+                <property role="TrG5h" value="x" />
+              </node>
+              <node concept="aFS0r" id="47tET_WGoCc" role="3TPQk">
+                <ref role="aFS0e" node="47tET_WGoCK" resolve="a" />
+              </node>
+            </node>
+          </node>
+          <node concept="3TPRf" id="47tET_WGoCd" role="1DVIrw">
+            <node concept="aFS0r" id="47tET_WGoCe" role="3TPQk">
+              <ref role="aFS0e" node="47tET_WGoCL" resolve="b" />
+            </node>
+            <node concept="t0$VC" id="47tET_WGoCf" role="3TPR0">
+              <ref role="t0$VJ" node="47tET_WGoBf" resolve="mempty" />
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="1FkZNI" id="47tET_WGoCg" role="1FkZNz">
+        <ref role="1FkZND" node="47tET_WGoBi" resolve="mappend" />
+        <node concept="1DVIrU" id="47tET_WGoCh" role="1FkZNF">
+          <node concept="1DVIrB" id="47tET_WGoCi" role="1DVIr_">
+            <node concept="3TPQf" id="47tET_WGoCj" role="1DVIrA">
+              <node concept="1DVIoH" id="47tET_WGoCk" role="3TPQ0">
+                <property role="TrG5h" value="f" />
+              </node>
+              <node concept="1jz_ff" id="47tET_WGoCl" role="3TPQk">
+                <node concept="aFS0r" id="47tET_WGoCm" role="1jz_fp">
+                  <ref role="aFS0e" node="47tET_WGoCK" resolve="a" />
+                </node>
+                <node concept="aFS0r" id="47tET_WGoCn" role="1jz_f_">
+                  <ref role="aFS0e" node="47tET_WGoCL" resolve="b" />
+                </node>
+              </node>
+            </node>
+          </node>
+          <node concept="1DVIrU" id="47tET_WGoCo" role="1DVIrw">
+            <node concept="1DVIrB" id="47tET_WGoCp" role="1DVIr_">
+              <node concept="3TPQf" id="47tET_WGoCq" role="1DVIrA">
+                <node concept="1DVIoH" id="47tET_WGoCr" role="3TPQ0">
+                  <property role="TrG5h" value="g" />
+                </node>
+                <node concept="1jz_ff" id="47tET_WGoCs" role="3TPQk">
+                  <node concept="aFS0r" id="47tET_WGoCt" role="1jz_fp">
+                    <ref role="aFS0e" node="47tET_WGoCK" resolve="a" />
+                  </node>
+                  <node concept="aFS0r" id="47tET_WGoCu" role="1jz_f_">
+                    <ref role="aFS0e" node="47tET_WGoCL" resolve="b" />
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node concept="1DVIrU" id="47tET_WGoCv" role="1DVIrw">
+              <node concept="1DVIrB" id="47tET_WGoCw" role="1DVIr_">
+                <node concept="3TPQf" id="47tET_WGoCx" role="1DVIrA">
+                  <node concept="1DVIoH" id="47tET_WGoCy" role="3TPQ0">
+                    <property role="TrG5h" value="a" />
+                  </node>
+                  <node concept="aFS0r" id="47tET_WGoCz" role="3TPQk">
+                    <ref role="aFS0e" node="47tET_WGoCK" resolve="a" />
+                  </node>
+                </node>
+              </node>
+              <node concept="1DVIo5" id="47tET_WGoC$" role="1DVIrw">
+                <node concept="1DVIo5" id="47tET_WGoC_" role="1DVIo8">
+                  <node concept="t0$VC" id="47tET_WGoCA" role="1DVIo8">
+                    <ref role="t0$VJ" node="47tET_WGoCx" resolve="a" />
+                  </node>
+                  <node concept="t0$VC" id="47tET_WGoCB" role="1DVIo4">
+                    <ref role="t0$VJ" node="47tET_WGoCq" resolve="g" />
+                  </node>
+                </node>
+                <node concept="1DVIo5" id="47tET_WGoCC" role="1DVIo4">
+                  <node concept="1DVIo5" id="47tET_WGoCD" role="1DVIo8">
+                    <node concept="t0$VC" id="47tET_WGoCE" role="1DVIo8">
+                      <ref role="t0$VJ" node="47tET_WGoCx" resolve="a" />
+                    </node>
+                    <node concept="t0$VC" id="47tET_WGoCF" role="1DVIo4">
+                      <ref role="t0$VJ" node="47tET_WGoCj" resolve="f" />
+                    </node>
+                  </node>
+                  <node concept="t0$VC" id="47tET_WGoCG" role="1DVIo4">
+                    <ref role="t0$VJ" node="47tET_WGoBj" resolve="mappend" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node concept="3JbUGG" id="47tET_WGoCH" role="1FkZNx">
+        <node concept="1FkZV4" id="47tET_WGoCI" role="1FkZ4g">
+          <ref role="1FvTW1" node="47tET_WGoCL" resolve="b" />
+          <ref role="1FkZV7" node="47tET_WGoBc" resolve="Monoid1" />
+        </node>
+        <node concept="2BbKIm" id="47tET_WGoCK" role="5lUUh">
+          <property role="TrG5h" value="a" />
+        </node>
+        <node concept="2BbKIm" id="47tET_WGoCL" role="5lUUh">
+          <property role="TrG5h" value="b" />
+        </node>
+        <node concept="1jz_ff" id="47tET_WGoCM" role="3JbKvY">
+          <node concept="aFS0r" id="47tET_WGoCN" role="1jz_fp">
+            <ref role="aFS0e" node="47tET_WGoCK" resolve="a" />
+          </node>
+          <node concept="aFS0r" id="47tET_WGoCO" role="1jz_f_">
+            <ref role="aFS0e" node="47tET_WGoCL" resolve="b" />
+          </node>
+        </node>
+      </node>
+    </node>
   </node>
 </model>