diff --git a/baselanguage/languages/jetbrains.mps.baseLanguageExt/models/controlflow.mps b/baselanguage/languages/jetbrains.mps.baseLanguageExt/models/controlflow.mps
index 8e725946..1b40effd 100644
--- a/baselanguage/languages/jetbrains.mps.baseLanguageExt/models/controlflow.mps
+++ b/baselanguage/languages/jetbrains.mps.baseLanguageExt/models/controlflow.mps
@@ -2,14 +2,18 @@
 <model ref="r:6a71ba3e-550e-4491-a65a-abcddca431cd(jetbrains.mps.baseLanguageExt.controlflow)">
   <persistence version="9" />
   <languages>
-    <use id="2e120f68-abfb-4980-bb1c-bc70159b1f95" name="jetbrains.mps.lang.controlflow" version="0" />
     <use id="c4803b19-6d89-4a3b-bf82-390769514add" name="jetbrains.mps.lang.coderules" version="14" />
+    <use id="35320f26-77cb-4c55-be9f-a97a27770af1" name="jetbrains.mps.logic" version="2" />
     <devkit ref="fbc25dd2-5da4-483a-8b19-70928e1b62d7(jetbrains.mps.devkit.general-purpose)" />
   </languages>
   <imports>
     <import index="fjx4" ref="r:5cb7c45c-18d8-4304-8c38-29c80242b908(jetbrains.mps.controlflow.service)" />
     <import index="tpee" ref="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" />
-    <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" implicit="true" />
+    <import index="i348" ref="r:42a15dec-83a9-4fe1-80d6-3bf898c512bd(jetbrains.mps.lang.coderules.template)" />
+    <import index="bj13" ref="bbf5c548-7111-4a53-a117-cdefc664cf34/java:jetbrains.mps.logic.reactor.logical(jetbrains.mps.logic.reactor/)" />
+    <import index="wyt6" ref="6354ebe7-c22a-4a0f-ac54-50b52ab9b065/java:java.lang(JDK/)" />
+    <import index="w7la" ref="bbf5c548-7111-4a53-a117-cdefc664cf34/java:jetbrains.mps.logic.reactor.evaluation(jetbrains.mps.logic.reactor/)" />
+    <import index="cxk7" ref="r:daa544a7-0a5c-49c0-a54c-4c2a5b4868aa(jetbrains.mps.logic.builtin.predicate)" />
   </imports>
   <registry>
     <language id="f3061a53-9226-4cc5-a443-f952ceaf5816" name="jetbrains.mps.baseLanguage">
@@ -22,6 +26,7 @@
       </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="1154032098014" name="jetbrains.mps.baseLanguage.structure.AbstractLoopStatement" flags="nn" index="2LF5Ji">
         <child id="1154032183016" name="body" index="2LFqv$" />
       </concept>
@@ -35,20 +40,29 @@
       <concept id="1070475926800" name="jetbrains.mps.baseLanguage.structure.StringLiteral" flags="nn" index="Xl_RD">
         <property id="1070475926801" name="value" index="Xl_RC" />
       </concept>
+      <concept id="1081236700938" name="jetbrains.mps.baseLanguage.structure.StaticMethodDeclaration" flags="ig" index="2YIFZL" />
       <concept id="1070533707846" name="jetbrains.mps.baseLanguage.structure.StaticFieldReference" flags="nn" index="10M0yZ">
         <reference id="1144433057691" name="classifier" index="1PxDUh" />
       </concept>
       <concept id="1070534058343" name="jetbrains.mps.baseLanguage.structure.NullLiteral" flags="nn" index="10Nm6u" />
+      <concept id="1070534644030" name="jetbrains.mps.baseLanguage.structure.BooleanType" flags="in" index="10P_77" />
+      <concept id="1068390468198" name="jetbrains.mps.baseLanguage.structure.ClassConcept" flags="ig" index="312cEu" />
       <concept id="1068431474542" name="jetbrains.mps.baseLanguage.structure.VariableDeclaration" flags="ng" index="33uBYm">
         <child id="1068431790190" name="initializer" index="33vP2m" />
       </concept>
       <concept id="1068498886296" name="jetbrains.mps.baseLanguage.structure.VariableReference" flags="nn" index="37vLTw">
         <reference id="1068581517664" name="variableDeclaration" index="3cqZAo" />
       </concept>
+      <concept id="1068498886292" name="jetbrains.mps.baseLanguage.structure.ParameterDeclaration" flags="ir" index="37vLTG" />
       <concept id="1068498886294" name="jetbrains.mps.baseLanguage.structure.AssignmentExpression" flags="nn" index="37vLTI" />
       <concept id="4972933694980447171" name="jetbrains.mps.baseLanguage.structure.BaseVariableDeclaration" flags="ng" index="19Szcq">
         <child id="5680397130376446158" name="type" index="1tU5fm" />
       </concept>
+      <concept id="1068580123132" name="jetbrains.mps.baseLanguage.structure.BaseMethodDeclaration" flags="ng" index="3clF44">
+        <child id="1068580123133" name="returnType" index="3clF45" />
+        <child id="1068580123134" name="parameter" index="3clF46" />
+        <child id="1068580123135" name="body" index="3clF47" />
+      </concept>
       <concept id="1068580123155" name="jetbrains.mps.baseLanguage.structure.ExpressionStatement" flags="nn" index="3clFbF">
         <child id="1068580123156" name="expression" index="3clFbG" />
       </concept>
@@ -68,6 +82,7 @@
       <concept id="1068580320020" name="jetbrains.mps.baseLanguage.structure.IntegerConstant" flags="nn" index="3cmrfG">
         <property id="1068580320021" name="value" index="3cmrfH" />
       </concept>
+      <concept id="1068581242875" name="jetbrains.mps.baseLanguage.structure.PlusExpression" flags="nn" index="3cpWs3" />
       <concept id="1068581242864" name="jetbrains.mps.baseLanguage.structure.LocalVariableDeclarationStatement" flags="nn" index="3cpWs8">
         <child id="1068581242865" name="localVariableDeclaration" index="3cpWs9" />
       </concept>
@@ -80,10 +95,21 @@
         <reference id="1068499141037" name="baseMethodDeclaration" index="37wK5l" />
         <child id="1068499141038" name="actualArgument" index="37wK5m" />
       </concept>
+      <concept id="1107461130800" name="jetbrains.mps.baseLanguage.structure.Classifier" flags="ng" index="3pOWGL">
+        <child id="5375687026011219971" name="member" index="jymVt" unordered="true" />
+      </concept>
+      <concept id="1107535904670" name="jetbrains.mps.baseLanguage.structure.ClassifierType" flags="in" index="3uibUv">
+        <reference id="1107535924139" name="classifier" index="3uigEE" />
+        <child id="1109201940907" name="parameter" index="11_B2D" />
+      </concept>
       <concept id="1081773326031" name="jetbrains.mps.baseLanguage.structure.BinaryOperation" flags="nn" index="3uHJSO">
         <child id="1081773367579" name="rightExpression" index="3uHU7w" />
         <child id="1081773367580" name="leftExpression" index="3uHU7B" />
       </concept>
+      <concept id="1178549954367" name="jetbrains.mps.baseLanguage.structure.IVisible" flags="ng" index="1B3ioH">
+        <child id="1178549979242" name="visibility" index="1B3o_S" />
+      </concept>
+      <concept id="1146644602865" name="jetbrains.mps.baseLanguage.structure.PublicVisibility" flags="nn" index="3Tm1VV" />
       <concept id="1080120340718" name="jetbrains.mps.baseLanguage.structure.AndExpression" flags="nn" index="1Wc70l" />
     </language>
     <language id="fd392034-7849-419d-9071-12563d152375" name="jetbrains.mps.baseLanguage.closures">
@@ -99,6 +125,9 @@
       <concept id="8829335963593820278" name="jetbrains.mps.logic.structure.LogicalVariable" flags="ng" index="a7P8L">
         <reference id="8829335963593822893" name="declaration" index="a7OzE" />
       </concept>
+      <concept id="8829335963591530299" name="jetbrains.mps.logic.structure.ExpressionLogicalVariable" flags="ng" index="aZ4PW">
+        <child id="8829335963591530990" name="expression" index="aZ4eD" />
+      </concept>
       <concept id="8829335963591572611" name="jetbrains.mps.logic.structure.LogicalVariableDeclaration" flags="ng" index="aZer4" />
     </language>
     <language id="7866978e-a0f0-4cc7-81bc-4d213d9375e1" name="jetbrains.mps.lang.smodel">
@@ -168,6 +197,10 @@
         <child id="7871500063866331596" name="queryStage" index="92CTm" />
         <child id="3026409000513569515" name="queryKind" index="2_lZgo" />
       </concept>
+      <concept id="6928531011217292466" name="jetbrains.mps.lang.coderules.structure.IsfreeVariableConstraint" flags="ng" index="2aLmEc" />
+      <concept id="6928531011217258898" name="jetbrains.mps.lang.coderules.structure.LogicVariableConstraint" flags="ng" index="2aLIYG">
+        <child id="6928531011217290187" name="variable" index="2aLmnP" />
+      </concept>
       <concept id="9035818301008609703" name="jetbrains.mps.lang.coderules.structure.QueryTemplate" flags="ng" index="2bWyPT">
         <child id="7871500063838282362" name="code" index="fHCRw" />
       </concept>
@@ -186,8 +219,12 @@
         <child id="1980609059185345194" name="constraint" index="8PkJo" />
         <child id="3575255234175157601" name="template" index="1nK1Vg" />
       </concept>
+      <concept id="6856711987714624232" name="jetbrains.mps.lang.coderules.structure.ExpressionItem" flags="ng" index="HKQnh">
+        <child id="6856711987714624233" name="code" index="HKQng" />
+      </concept>
       <concept id="3575255234174969639" name="jetbrains.mps.lang.coderules.structure.ConstraintRule" flags="ng" index="1nLNMm">
         <child id="8456919074565751439" name="parameter" index="0UC6o" />
+        <child id="3575255234174969659" name="guard" index="1nLNMa" />
         <child id="3575255234174969658" name="head" index="1nLNMb" />
         <child id="3575255234174969660" name="body" index="1nLNMd" />
       </concept>
@@ -208,12 +245,17 @@
       <concept id="7368070394769139970" name="jetbrains.mps.lang.coderules.structure.RuleInputReference" flags="ng" index="3A2sRY">
         <reference id="7368070394769213644" name="declaration" index="3A2yKK" />
       </concept>
+      <concept id="7368070394770780974" name="jetbrains.mps.lang.coderules.structure.UnifiesConstraint" flags="ng" index="3A8Hvi">
+        <child id="7368070394770793930" name="value" index="3A8w4Q" />
+        <child id="7368070394770793388" name="assignee" index="3A8wtg" />
+      </concept>
       <concept id="7368070394766963750" name="jetbrains.mps.lang.coderules.structure.Head" flags="ng" index="3Aq93q">
         <property id="7368070394767443940" name="keep" index="3ArMco" />
       </concept>
       <concept id="7368070394766963523" name="jetbrains.mps.lang.coderules.structure.RuleComponent" flags="ng" index="3Aq9uZ">
         <child id="2316688792939037645" name="logic" index="3Ip0Jz" />
       </concept>
+      <concept id="7368070394766966158" name="jetbrains.mps.lang.coderules.structure.Guard" flags="ng" index="3Aq9_M" />
       <concept id="7368070394766966388" name="jetbrains.mps.lang.coderules.structure.Body" flags="ng" index="3Aq9E8" />
       <concept id="7368070394766978092" name="jetbrains.mps.lang.coderules.structure.EmitConstraintStatement" flags="ng" index="3Aqczg">
         <child id="7368070394767031348" name="constraint" index="3Aqpz8" />
@@ -262,11 +304,6 @@
                     <ref role="3AqCNq" node="AoTMCCYnN1" resolve="trace_rw" />
                   </node>
                 </node>
-                <node concept="3I6s7M" id="78H58oeAof1" role="3I6sU7">
-                  <node concept="3Aqt3T" id="78H58oeAofi" role="3I6s78">
-                    <ref role="3AqCNq" node="78H58oeAof4" resolve="checkAll" />
-                  </node>
-                </node>
               </node>
             </node>
           </node>
@@ -289,9 +326,6 @@
             <node concept="3clFbH" id="6Yb9hAqKKd2" role="3cqZAp" />
             <node concept="1nLNNL" id="6Yb9hAqKu6d" role="3cqZAp">
               <node concept="1nLNMm" id="6Yb9hAqKu6e" role="1nLNNK">
-                <node concept="3Aq9E8" id="xaaVXuQdb2" role="1nLNMd">
-                  <node concept="3I6sU6" id="xaaVXuQdb3" role="3Ip0Jz" />
-                </node>
                 <node concept="3Aq9E8" id="6Yb9hAqKu7x" role="1nLNMd">
                   <node concept="3I6sU6" id="6Yb9hAqKu7y" role="3Ip0Jz">
                     <node concept="3I6s7M" id="6Yb9hAqKu7A" role="3I6sU7">
@@ -1255,168 +1289,6 @@
         </node>
       </node>
     </node>
-    <node concept="1nLNMY" id="6F9w2VbPMWV" role="1nK1Vg">
-      <property role="TrG5h" value="assignmentExpression_used" />
-      <node concept="3clFbS" id="6F9w2VbPMWW" role="1nLNMH">
-        <node concept="1nLNNL" id="6F9w2VbPMWX" role="3cqZAp">
-          <node concept="1nLNMm" id="6F9w2VbPMWY" role="1nLNNK">
-            <node concept="3Aq93q" id="6F9w2VbPMX2" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="6F9w2VbPMX3" role="3Ip0Jz">
-                <node concept="3I6s7M" id="6F9w2VbPMX4" role="3I6sU7">
-                  <node concept="3Aqt3T" id="6F9w2VbPMX5" role="3I6s78">
-                    <ref role="3AqCNq" node="78H58oeAof4" resolve="checkAll" />
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq9E8" id="6F9w2VbPMX6" role="1nLNMd">
-              <node concept="3I6sU6" id="6F9w2VbPMX7" role="3Ip0Jz">
-                <node concept="3I6s7M" id="6F9w2VbPMX8" role="3I6sU7">
-                  <node concept="3Aqt3T" id="6F9w2VbPMX9" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqOFjy" resolve="unusedAssignment" />
-                    <node concept="3BlFb$" id="6F9w2VbPMXa" role="3AunhB">
-                      <node concept="3A2sRY" id="6F9w2VbPMXb" role="3BlFb_">
-                        <ref role="3A2yKK" node="6F9w2VbPMXN" resolve="ae" />
-                      </node>
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="3clFbH" id="6F9w2VbPMXc" role="3cqZAp" />
-        <node concept="1nLNNL" id="5YmBCzQJ2UJ" role="3cqZAp">
-          <node concept="1nLNMm" id="5YmBCzQJ2UK" role="1nLNNK">
-            <node concept="3Aq93q" id="5YmBCzQJ2UL" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="5YmBCzQJ2UM" role="3Ip0Jz">
-                <node concept="3I6s7M" id="5YmBCzQJ2UN" role="3I6sU7">
-                  <node concept="3Aqt3T" id="5YmBCzQJ2UO" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqNHxU" resolve="read" />
-                    <node concept="a7P8L" id="5YmBCzQL7U7" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQL7TW" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="5YmBCzQPHby" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQNaC4" resolve="RSite" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="5YmBCzQMzuZ" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="5YmBCzQMzv0" role="3Ip0Jz">
-                <node concept="3I6s7M" id="5YmBCzQMzvk" role="3I6sU7">
-                  <node concept="3Aqt3T" id="5YmBCzQMzvj" role="3I6s78">
-                    <ref role="3AqCNq" node="5YmBCzQERxT" resolve="tr_readOk" />
-                    <node concept="a7P8L" id="5YmBCzQMzvv" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQL7TW" resolve="Loc" />
-                    </node>
-                    <node concept="3BlFb$" id="5YmBCzQKLOT" role="3AunhB">
-                      <node concept="2OqwBi" id="5YmBCzQKLOU" role="3BlFb_">
-                        <node concept="3A2sRY" id="5YmBCzQKLOV" role="2Oq$k0">
-                          <ref role="3A2yKK" node="6F9w2VbPMXN" resolve="ae" />
-                        </node>
-                        <node concept="3TrEf2" id="5YmBCzQKLOW" role="2OqNvi">
-                          <ref role="3Tt5mk" to="tpee:fz7vLUn" resolve="lValue" />
-                        </node>
-                      </node>
-                    </node>
-                    <node concept="a7P8L" id="5YmBCzQPHbM" role="3AunhB">
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-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="5YmBCzQJ2V1" role="1nLNMb">
-              <property role="3ArMco" value="false" />
-              <node concept="3I6sU6" id="5YmBCzQJ2V2" role="3Ip0Jz">
-                <node concept="3I6s7M" id="5YmBCzQJ2V3" role="3I6sU7">
-                  <node concept="3Aqt3T" id="5YmBCzQJ2V4" role="3I6s78">
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-            <node concept="0eUR_" id="5YmBCzQJ2V7" role="0UC6o">
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-                <node concept="aZer4" id="5YmBCzQL7TW" role="3XD1gS">
-                  <property role="TrG5h" value="Loc" />
-                </node>
-                <node concept="aZer4" id="5YmBCzQLuQs" role="3XD1gS">
-                  <property role="TrG5h" value="Via" />
-                </node>
-                <node concept="aZer4" id="5YmBCzQNaC4" role="3XD1gS">
-                  <property role="TrG5h" value="RSite" />
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="3clFbH" id="xaaVXuTW__" role="3cqZAp" />
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-            <node concept="3Aq93q" id="6F9w2VbPMX$" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="6F9w2VbPMX_" role="3Ip0Jz">
-                <node concept="3I6s7M" id="6F9w2VbPMXA" role="3I6sU7">
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-                    <ref role="3AqCNq" node="6Yb9hAqOFjy" resolve="unusedAssignment" />
-                    <node concept="3BlFb$" id="6F9w2VbPMXC" role="3AunhB">
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-                      </node>
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-              </node>
-            </node>
-            <node concept="3Aq9E8" id="6F9w2VbPMXE" role="1nLNMd">
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-                <node concept="3I6s7M" id="6F9w2VbPMXG" role="3I6sU7">
-                  <node concept="3wWvb2" id="6F9w2VbPMXH" role="3I6s78">
-                    <node concept="2OqwBi" id="6F9w2VbPMXI" role="3wWo3s">
-                      <node concept="3A2sRY" id="6F9w2VbPMXJ" role="2Oq$k0">
-                        <ref role="3A2yKK" node="6F9w2VbPMXN" resolve="ae" />
-                      </node>
-                      <node concept="2s7oft" id="6F9w2VbPMXK" role="2OqNvi">
-                        <property role="2s7ueQ" value="error" />
-                        <node concept="Xl_RD" id="6F9w2VbPMXL" role="2s7u9n">
-                          <property role="Xl_RC" value="unused assignment" />
-                        </node>
-                      </node>
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
-      </node>
-      <node concept="2t___k" id="6F9w2VbPMXM" role="1nLNMg">
-        <ref role="2t_S0q" to="tpee:fz7vLUm" resolve="AssignmentExpression" />
-        <node concept="3A20r5" id="6F9w2VbPMXN" role="2t_VXX">
-          <property role="TrG5h" value="ae" />
-        </node>
-      </node>
-      <node concept="cBwPQ" id="5YmBCzQNckT" role="1nLFYo">
-        <node concept="3clFbS" id="5YmBCzQNckU" role="16YjZG">
-          <node concept="3clFbF" id="5YmBCzQNckY" role="3cqZAp">
-            <node concept="3clFbT" id="5YmBCzQNckX" role="3clFbG">
-              <property role="3clFbU" value="false" />
-            </node>
-          </node>
-        </node>
-      </node>
-    </node>
     <node concept="3AqmO8" id="78H58oeAof4" role="8PkJo">
       <property role="TrG5h" value="checkAll" />
     </node>
@@ -5028,287 +4900,125 @@
   <node concept="AVZre" id="6Yb9hAqNTWV">
     <property role="TrG5h" value="ReadWrite" />
     <ref role="2YbDB9" node="78H58oerI5G" resolve="Reachability" />
-    <node concept="1nLNMY" id="5YmBCzQLucU" role="1nK1Vg">
-      <property role="TrG5h" value="writeOk" />
-      <node concept="3clFbS" id="5YmBCzQLucV" role="1nLNMH">
-        <node concept="1nLNNL" id="5YmBCzQLuju" role="3cqZAp">
-          <node concept="1nLNMm" id="5YmBCzQLujw" role="1nLNNK">
-            <node concept="3Aq9E8" id="5YmBCzQLul6" role="1nLNMd">
-              <node concept="3I6sU6" id="5YmBCzQLul7" role="3Ip0Jz">
-                <node concept="3I6s7M" id="5YmBCzQLulb" role="3I6sU7">
-                  <node concept="3Aqt3T" id="5YmBCzQLula" role="3I6s78">
-                    <ref role="3AqCNq" node="5YmBCzQERyp" resolve="tr_writeOk" />
-                    <node concept="a7P8L" id="5YmBCzQLulg" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLukx" resolve="Loc" />
+    <node concept="1nLNMY" id="22$xxOvW8oO" role="1nK1Vg">
+      <property role="TrG5h" value="visitMethodDeclaration" />
+      <property role="1nmhW7" value="true" />
+      <node concept="3clFbS" id="22$xxOvW8oP" role="1nLNMH">
+        <node concept="3clFbJ" id="22$xxOvW8oQ" role="3cqZAp">
+          <node concept="3clFbS" id="22$xxOvW8oR" role="3clFbx">
+            <node concept="1nLNNL" id="22$xxOvW8oT" role="3cqZAp">
+              <node concept="1nLNMm" id="22$xxOvW8oU" role="1nLNNK">
+                <node concept="3Aq9E8" id="22$xxOvW8oV" role="1nLNMd">
+                  <node concept="3I6sU6" id="22$xxOvW8oW" role="3Ip0Jz">
+                    <node concept="3I6s7M" id="22$xxOvW8Iv" role="3I6sU7">
+                      <node concept="3Aqt3T" id="22$xxOvW8It" role="3I6s78">
+                        <ref role="3AqCNq" node="22$xxOvW8Hm" resolve="visit" />
+                        <node concept="3BlFb$" id="22$xxOvW8IY" role="3AunhB">
+                          <node concept="3A2sRY" id="22$xxOvW8IZ" role="3BlFb_">
+                            <ref role="3A2yKK" node="22$xxOvW8p_" resolve="bmd" />
+                          </node>
+                        </node>
+                      </node>
                     </node>
-                    <node concept="a7P8L" id="5YmBCzQLupk" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLujL" resolve="Succ" />
+                  </node>
+                </node>
+                <node concept="3Aq93q" id="22$xxOvW8pp" role="1nLNMb">
+                  <property role="3ArMco" value="true" />
+                  <node concept="3I6sU6" id="22$xxOvW8pq" role="3Ip0Jz">
+                    <node concept="3I6s7M" id="22$xxOvW8pr" role="3I6sU7">
+                      <node concept="3Aqt3T" id="22$xxOvW8HY" role="3I6s78">
+                        <ref role="3AqCNq" node="AoTMCCYnN1" resolve="trace_rw" />
+                      </node>
                     </node>
                   </node>
                 </node>
               </node>
             </node>
-            <node concept="3Aq93q" id="FAZzzisEmK" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="FAZzzisEmL" role="3Ip0Jz">
-                <node concept="3I6s7M" id="FAZzzisEnf" role="3I6sU7">
-                  <node concept="3Aqt3T" id="FAZzzisEne" role="3I6s78">
-                    <ref role="3AqCNq" node="AoTMCCYnN1" resolve="trace_rw" />
+          </node>
+          <node concept="2OqwBi" id="22$xxOvW8pt" role="3clFbw">
+            <node concept="2OqwBi" id="22$xxOvW8pu" role="2Oq$k0">
+              <node concept="2OqwBi" id="22$xxOvW8pv" role="2Oq$k0">
+                <node concept="3A2sRY" id="22$xxOvW8pw" role="2Oq$k0">
+                  <ref role="3A2yKK" node="22$xxOvW8p_" resolve="bmd" />
+                </node>
+                <node concept="3TrEf2" id="22$xxOvW8px" role="2OqNvi">
+                  <ref role="3Tt5mk" to="tpee:fzclF7Z" resolve="body" />
+                </node>
+              </node>
+              <node concept="3Tsc0h" id="22$xxOvW8py" role="2OqNvi">
+                <ref role="3TtcxE" to="tpee:fzcqZ_x" resolve="statement" />
+              </node>
+            </node>
+            <node concept="3GX2aA" id="22$xxOvW8pz" role="2OqNvi" />
+          </node>
+        </node>
+      </node>
+      <node concept="2t___k" id="22$xxOvW8p$" role="1nLNMg">
+        <ref role="2t_S0q" to="tpee:fzclF7W" resolve="BaseMethodDeclaration" />
+        <node concept="3A20r5" id="22$xxOvW8p_" role="2t_VXX">
+          <property role="TrG5h" value="bmd" />
+        </node>
+      </node>
+    </node>
+    <node concept="1nLNMY" id="22$xxOvW87c" role="1nK1Vg">
+      <property role="TrG5h" value="visit" />
+      <node concept="3clFbS" id="22$xxOvW87d" role="1nLNMH">
+        <node concept="1nLNNL" id="22$xxOvZhBm" role="3cqZAp">
+          <node concept="1nLNMm" id="22$xxOvZhBo" role="1nLNNK">
+            <node concept="3Aq93q" id="22$xxOvZhC2" role="1nLNMb">
+              <property role="3ArMco" value="false" />
+              <node concept="3I6sU6" id="22$xxOvZhC3" role="3Ip0Jz">
+                <node concept="3I6s7M" id="22$xxOvZhC7" role="3I6sU7">
+                  <node concept="3Aqt3T" id="22$xxOvZhC6" role="3I6s78">
+                    <ref role="3AqCNq" node="22$xxOvW8Hm" resolve="visit" />
+                    <node concept="a7P8L" id="22$xxOvZhCv" role="3AunhB">
+                      <ref role="a7OzE" node="22$xxOvZhCq" resolve="Pred" />
+                    </node>
                   </node>
                 </node>
               </node>
             </node>
-            <node concept="3Aq93q" id="5YmBCzQLuj_" role="1nLNMb">
+            <node concept="3Aq93q" id="7pxta7vl1gD" role="1nLNMb">
               <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="5YmBCzQLujA" role="3Ip0Jz">
-                <node concept="3I6s7M" id="5YmBCzQLujE" role="3I6sU7">
-                  <node concept="3Aqt3T" id="5YmBCzQLujD" role="3I6s78">
+              <node concept="3I6sU6" id="7pxta7vl1gE" role="3Ip0Jz">
+                <node concept="3I6s7M" id="7pxta7vl1hz" role="3I6sU7">
+                  <node concept="3Aqt3T" id="7pxta7vl1hy" role="3I6s78">
                     <ref role="3AqCNq" node="6Yb9hAqKKfy" resolve="follow" />
-                    <node concept="a7P8L" id="5YmBCzQLujZ" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLujO" resolve="RSite" />
+                    <node concept="a7P8L" id="7pxta7vl1j8" role="3AunhB">
+                      <ref role="a7OzE" node="22$xxOvZhCq" resolve="Pred" />
                     </node>
-                    <node concept="a7P8L" id="5YmBCzQLujT" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLujL" resolve="Succ" />
+                    <node concept="a7P8L" id="7pxta7vl1jY" role="3AunhB">
+                      <ref role="a7OzE" node="7pxta7vl1bV" resolve="Succ" />
                     </node>
                   </node>
                 </node>
               </node>
             </node>
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-              <property role="3ArMco" value="true" />
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-                    <ref role="3AqCNq" node="6Yb9hAqNHxU" resolve="read" />
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-                      <ref role="a7OzE" node="5YmBCzQLujO" resolve="RSite" />
-                    </node>
-                  </node>
+            <node concept="0eUR_" id="22$xxOvZhCn" role="0UC6o">
+              <node concept="3NuqgR" id="22$xxOvZhCp" role="0eVf_">
+                <node concept="aZer4" id="22$xxOvZhCq" role="3XD1gS">
+                  <property role="TrG5h" value="Pred" />
                 </node>
-              </node>
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-            <node concept="0eUR_" id="5YmBCzQLujI" role="0UC6o">
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-                  <property role="TrG5h" value="RSite" />
-                </node>
-                <node concept="aZer4" id="5YmBCzQLujL" role="3XD1gS">
+                <node concept="aZer4" id="7pxta7vl1bV" role="3XD1gS">
                   <property role="TrG5h" value="Succ" />
                 </node>
               </node>
             </node>
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-                    <node concept="a7P8L" id="5YmBCzQRDI9" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLujL" resolve="Succ" />
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+              <node concept="3I6sU6" id="22$xxOvZhC$" role="3Ip0Jz">
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-                  <node concept="3Aqt3T" id="FAZzzip$XV" role="3I6s78">
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-                    <node concept="a7P8L" id="FAZzzip$XW" role="3AunhB">
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-                      <ref role="a7OzE" node="5YmBCzQLujL" resolve="Succ" />
-                    </node>
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-            <node concept="3Aq93q" id="FAZzzip$XY" role="1nLNMb">
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-              <node concept="3I6sU6" id="FAZzzip$XZ" role="3Ip0Jz">
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-                  <node concept="3Aqt3T" id="FAZzzip$Y1" role="3I6s78">
-                    <ref role="3AqCNq" node="5YmBCzQERyp" resolve="tr_writeOk" />
-                    <node concept="a7P8L" id="FAZzzip$Y2" role="3AunhB">
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-                    </node>
-                    <node concept="a7P8L" id="FAZzzip$Y3" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuDE" resolve="Pred" />
+                <node concept="3I6s7M" id="22$xxOw8LE8" role="3I6sU7">
+                  <node concept="3Aqt3T" id="22$xxOw8LE6" role="3I6s78">
+                    <ref role="3AqCNq" node="22$xxOvZhmm" resolve="visit_read" />
+                    <node concept="a7P8L" id="7pxta7vl1kM" role="3AunhB">
+                      <ref role="a7OzE" node="7pxta7vl1bV" resolve="Succ" />
                     </node>
                   </node>
                 </node>
@@ -5318,324 +5028,95 @@
         </node>
       </node>
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-    <node concept="1nLNMY" id="5YmBCzQR0fm" role="1nK1Vg">
-      <property role="TrG5h" value="readFoul" />
-      <node concept="3clFbS" id="5YmBCzQR0fn" role="1nLNMH">
-        <node concept="3clFbH" id="FAZzzit0nm" role="3cqZAp" />
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-          <node concept="1nLNMm" id="FAZzzit0no" role="1nLNNK">
-            <node concept="3Aq93q" id="FAZzzit0np" role="1nLNMb">
+    <node concept="1nLNMY" id="22$xxOvZhn8" role="1nK1Vg">
+      <property role="TrG5h" value="visit_write" />
+      <node concept="3clFbS" id="22$xxOvZhn9" role="1nLNMH">
+        <node concept="1nLNNL" id="22$xxOw7RN4" role="3cqZAp">
+          <node concept="1nLNMm" id="22$xxOw7RN6" role="1nLNNK">
+            <node concept="3Aq93q" id="22$xxOw7RN_" role="1nLNMb">
               <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="FAZzzit0nq" role="3Ip0Jz">
-                <node concept="3I6s7M" id="FAZzzit0nr" role="3I6sU7">
-                  <node concept="3Aqt3T" id="FAZzzit0ns" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqNHxU" resolve="read" />
-                    <node concept="a7P8L" id="FAZzzit0nt" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQR0uB" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="FAZzzit0nu" role="3AunhB">
-                      <ref role="a7OzE" node="FAZzzit0nC" resolve="RSite" />
+              <node concept="3I6sU6" id="22$xxOw7RNA" role="3Ip0Jz">
+                <node concept="3I6s7M" id="22$xxOw7RNE" role="3I6sU7">
+                  <node concept="3Aqt3T" id="22$xxOw7RND" role="3I6s78">
+                    <ref role="3AqCNq" node="22$xxOw7RKD" resolve="visited_write" />
+                    <node concept="a7P8L" id="22$xxOw7RNQ" role="3AunhB">
+                      <ref role="a7OzE" node="22$xxOw7RNL" resolve="Node" />
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               </node>
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-                  <node concept="3Aqt3T" id="FAZzzit0ny" role="3I6s78">
-                    <ref role="3AqCNq" node="5YmBCzQERyW" resolve="tr_readBad" />
-                    <node concept="a7P8L" id="FAZzzit0nz" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQR0uB" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="FAZzzit0pq" role="3AunhB">
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-                <node concept="aZer4" id="5YmBCzQR0uB" role="3XD1gS">
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-              <node concept="3I6sU6" id="FAZzzit0nE" role="3Ip0Jz">
-                <node concept="3I6s7M" id="FAZzzit0nF" role="3I6sU7">
-                  <node concept="3Aqt3T" id="FAZzzit0nG" role="3I6s78">
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-                    <node concept="a7P8L" id="FAZzzit0sW" role="3AunhB">
-                      <ref role="a7OzE" node="FAZzzit0nC" resolve="RSite" />
-                    </node>
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-                  <node concept="3Aqt3T" id="FAZzzit0td" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqNHxU" resolve="read" />
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-            <node concept="3Aq93q" id="5YmBCzQR0xu" role="1nLNMb">
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               <property role="3ArMco" value="false" />
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-                      <ref role="a7OzE" node="5YmBCzQR0uE" resolve="Pred" />
+              <node concept="3I6sU6" id="22$xxOw7ROi" role="3Ip0Jz">
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+                  <node concept="3Aqt3T" id="22$xxOw7ROq" role="3I6s78">
+                    <ref role="3AqCNq" node="22$xxOvZhlA" resolve="visit_write" />
+                    <node concept="a7P8L" id="22$xxOw7ROw" role="3AunhB">
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+            <node concept="0eUR_" id="22$xxOw7RNI" role="0UC6o">
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+                <node concept="aZer4" id="22$xxOw7RNL" role="3XD1gS">
+                  <property role="TrG5h" value="Node" />
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+              <property role="3ArMco" value="true" />
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                   <property role="TrG5h" value="Pred" />
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-                    <node concept="a7P8L" id="FAZzzip_2k" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQR0yt" resolve="Succ" />
+            <node concept="3Aq9E8" id="22$xxOvZhnr" role="1nLNMd">
+              <node concept="3I6sU6" id="22$xxOvZhns" role="3Ip0Jz">
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+                  <node concept="3Aqt3T" id="22$xxOvZhnu" role="3I6s78">
+                    <ref role="3AqCNq" node="22$xxOvZhlA" resolve="visit_write" />
+                    <node concept="a7P8L" id="22$xxOvZhnv" role="3AunhB">
+                      <ref role="a7OzE" node="22$xxOvZhnq" resolve="Succ" />
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@@ -5645,149 +5126,788 @@
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-                      <ref role="a7OzE" node="5YmBCzQLuxU" resolve="Succ" />
+    <node concept="1nLNMY" id="22$xxOvW8Xi" role="1nK1Vg">
+      <property role="TrG5h" value="write_live" />
+      <node concept="3clFbS" id="22$xxOvW8Xj" role="1nLNMH">
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+                  <node concept="3Aqt3T" id="22$xxOvWa3A" role="3I6s78">
+                    <ref role="3AqCNq" node="22$xxOvZhlA" resolve="visit_write" />
+                    <node concept="a7P8L" id="22$xxOvWa3B" role="3AunhB">
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               <property role="3ArMco" value="true" />
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+              <node concept="3I6sU6" id="22$xxOvW9kL" role="3Ip0Jz">
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-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
+                    <node concept="a7P8L" id="22$xxOvW9mT" role="3AunhB">
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+                    <node concept="a7P8L" id="22$xxOvW9n1" role="3AunhB">
+                      <ref role="a7OzE" node="22$xxOvW9lq" resolve="RSite" />
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+            <node concept="3Aq93q" id="22$xxOvW9kP" role="1nLNMb">
+              <property role="3ArMco" value="true" />
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-                    <node concept="a7P8L" id="FAZzzit0t4" role="3AunhB">
-                      <ref role="a7OzE" node="FAZzzit06D" resolve="RSite" />
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-                    <node concept="a7P8L" id="FAZzziuIRB" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
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+                      <ref role="a7OzE" node="22$xxOvW9lu" resolve="WSite" />
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@@ -5795,217 +5915,69 @@
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+                      <ref role="a7OzE" node="22$xxOvW9xt" resolve="FreeRSite" />
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+                <node concept="aZer4" id="22$xxOvW9xe" role="3XD1gS">
+                  <property role="TrG5h" value="Node" />
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+                <node concept="aZer4" id="22$xxOvW9xt" role="3XD1gS">
+                  <property role="TrG5h" value="FreeRSite" />
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+              </node>
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+              <node concept="3I6sU6" id="22$xxOvW9xD" role="3Ip0Jz">
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@@ -6013,55 +5985,73 @@
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+        <node concept="3clFbH" id="22$xxOvW9zL" role="3cqZAp" />
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-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
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+                    <ref role="3AqCNq" node="22$xxOvW84F" resolve="live" />
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+                      <ref role="a7OzE" node="22$xxOvW9lu" resolve="WSite" />
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@@ -6069,328 +6059,12 @@
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-                  <property role="TrG5h" value="Succ2" />
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="3clFbH" id="FAZzzip_4D" role="3cqZAp" />
-        <node concept="1nLNNL" id="79EwspgNdcN" role="3cqZAp">
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-                  <node concept="3Aqt3T" id="79EwspgNdcS" role="3I6s78">
-                    <ref role="3AqCNq" node="79EwspgMi9T" resolve="tr_loop_readOk" />
-                    <node concept="a7P8L" id="79EwspgNdcT" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxS" resolve="Loc" />
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-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
-                    </node>
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-                      <ref role="a7OzE" node="5YmBCzQLuxU" resolve="Succ" />
-                    </node>
-                  </node>
-                </node>
-                <node concept="3I6s7M" id="79EwspgNdcW" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNdcX" role="3I6s78">
-                    <ref role="3AqCNq" node="79EwspgMi9T" resolve="tr_loop_readOk" />
-                    <node concept="a7P8L" id="79EwspgNdcY" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxS" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNdcZ" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNdi4" role="3AunhB">
-                      <ref role="a7OzE" node="FAZzzip_6F" resolve="Succ2" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="79EwspgNdd1" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="79EwspgNdd2" role="3Ip0Jz">
-                <node concept="3I6s7M" id="79EwspgNdd3" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNdd4" role="3I6s78">
-                    <ref role="3AqCNq" node="FAZzzinzPp" resolve="split" />
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-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="79EwspgNdd6" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="79EwspgNdd7" role="3Ip0Jz">
-                <node concept="3I6s7M" id="79EwspgNdd8" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNdd9" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqKKfy" resolve="follow" />
-                    <node concept="a7P8L" id="79EwspgNdda" role="3AunhB">
-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNddb" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxU" resolve="Succ" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="79EwspgNddc" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="79EwspgNddd" role="3Ip0Jz">
-                <node concept="3I6s7M" id="79EwspgNdde" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNddf" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqKKfy" resolve="follow" />
-                    <node concept="a7P8L" id="79EwspgNddg" role="3AunhB">
-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNdi9" role="3AunhB">
-                      <ref role="a7OzE" node="FAZzzip_6F" resolve="Succ2" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="79EwspgNddi" role="1nLNMb">
-              <property role="3ArMco" value="false" />
-              <node concept="3I6sU6" id="79EwspgNddj" role="3Ip0Jz">
-                <node concept="3I6s7M" id="79EwspgNddk" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNddl" role="3I6s78">
-                    <ref role="3AqCNq" node="79EwspgMi9T" resolve="tr_loop_readOk" />
-                    <node concept="a7P8L" id="79EwspgNddm" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxS" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNddn" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNddo" role="3AunhB">
-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="3clFbH" id="79EwspgNdcM" role="3cqZAp" />
-        <node concept="1nLNNL" id="FAZzzip_4g" role="3cqZAp">
-          <node concept="1nLNMm" id="FAZzzip_4h" role="1nLNNK">
-            <node concept="3Aq9E8" id="FAZzzip_4i" role="1nLNMd">
-              <node concept="3I6sU6" id="FAZzzip_4j" role="3Ip0Jz">
-                <node concept="3I6s7M" id="FAZzzip_4k" role="3I6sU7">
-                  <node concept="3Aqt3T" id="FAZzzip_4l" role="3I6s78">
-                    <ref role="3AqCNq" node="5YmBCzQERxT" resolve="tr_readOk" />
-                    <node concept="a7P8L" id="FAZzzip_4m" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxS" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="FAZzzip_4n" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
-                    </node>
-                    <node concept="a7P8L" id="FAZzzip_4o" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxU" resolve="Succ" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="FAZzzip_4p" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="FAZzzip_4q" role="3Ip0Jz">
-                <node concept="3I6s7M" id="FAZzzip_4r" role="3I6sU7">
-                  <node concept="3Aqt3T" id="FAZzzip_4s" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqKKfy" resolve="follow" />
-                    <node concept="a7P8L" id="79EwspgMKc5" role="3AunhB">
-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                    <node concept="a7P8L" id="FAZzzip_4u" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxU" resolve="Succ" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="FAZzzip_4v" role="1nLNMb">
-              <property role="3ArMco" value="false" />
-              <node concept="3I6sU6" id="FAZzzip_4w" role="3Ip0Jz">
-                <node concept="3I6s7M" id="FAZzzip_4x" role="3I6sU7">
-                  <node concept="3Aqt3T" id="FAZzzip_4y" role="3I6s78">
-                    <ref role="3AqCNq" node="5YmBCzQERxT" resolve="tr_readOk" />
-                    <node concept="a7P8L" id="FAZzzip_4z" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxS" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="FAZzzip_4$" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgMKc9" role="3AunhB">
-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-          </node>
-        </node>
-        <node concept="3clFbH" id="79EwspgNd8N" role="3cqZAp" />
-        <node concept="1nLNNL" id="79EwspgNd8t" role="3cqZAp">
-          <node concept="1nLNMm" id="79EwspgNd8u" role="1nLNNK">
-            <node concept="3Aq9E8" id="79EwspgNd8v" role="1nLNMd">
-              <node concept="3I6sU6" id="79EwspgNd8w" role="3Ip0Jz">
-                <node concept="3I6s7M" id="79EwspgNd8x" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNd8y" role="3I6s78">
-                    <ref role="3AqCNq" node="79EwspgMi9T" resolve="tr_loop_readOk" />
-                    <node concept="a7P8L" id="79EwspgNd8z" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxS" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNd8$" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNd8_" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxU" resolve="Succ" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="79EwspgNd8A" role="1nLNMb">
-              <property role="3ArMco" value="true" />
-              <node concept="3I6sU6" id="79EwspgNd8B" role="3Ip0Jz">
-                <node concept="3I6s7M" id="79EwspgNd8C" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNd8D" role="3I6s78">
-                    <ref role="3AqCNq" node="6Yb9hAqKKfy" resolve="follow" />
-                    <node concept="a7P8L" id="79EwspgNd8E" role="3AunhB">
-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNd8F" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxU" resolve="Succ" />
-                    </node>
-                  </node>
-                </node>
-              </node>
-            </node>
-            <node concept="3Aq93q" id="79EwspgNd8G" role="1nLNMb">
-              <property role="3ArMco" value="false" />
-              <node concept="3I6sU6" id="79EwspgNd8H" role="3Ip0Jz">
-                <node concept="3I6s7M" id="79EwspgNd8I" role="3I6sU7">
-                  <node concept="3Aqt3T" id="79EwspgNd8J" role="3I6s78">
-                    <ref role="3AqCNq" node="79EwspgMi9T" resolve="tr_loop_readOk" />
-                    <node concept="a7P8L" id="79EwspgNd8K" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxS" resolve="Loc" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNd8L" role="3AunhB">
-                      <ref role="a7OzE" node="5YmBCzQLuxT" resolve="WSite" />
-                    </node>
-                    <node concept="a7P8L" id="79EwspgNd8M" role="3AunhB">
-                      <ref role="a7OzE" node="79EwspgMiaG" resolve="Pred" />
-                    </node>
-                  </node>
-                </node>
-              </node>
+      </node>
+      <node concept="cBwPQ" id="22$xxOw2s_y" role="1nLFYo">
+        <node concept="3clFbS" id="22$xxOw2s_z" role="16YjZG">
+          <node concept="3clFbF" id="22$xxOw2s_B" role="3cqZAp">
+            <node concept="3clFbT" id="22$xxOw2s_A" role="3clFbG">
+              <property role="3clFbU" value="false" />
             </node>
           </node>
         </node>
@@ -6414,6 +6088,99 @@
         <property role="TrG5h" value="site" />
       </node>
     </node>
+    <node concept="3AqmO8" id="22$xxOvW8Hm" role="8PkJo">
+      <property role="TrG5h" value="visit" />
+      <node concept="1zAUYm" id="22$xxOvW8HW" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOw7RKD" role="8PkJo">
+      <property role="TrG5h" value="visited_write" />
+      <node concept="1zAUYm" id="22$xxOw7RLs" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOvZhlA" role="8PkJo">
+      <property role="TrG5h" value="visit_write" />
+      <node concept="1zAUYm" id="22$xxOvZhlB" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOw9eEw" role="8PkJo">
+      <property role="TrG5h" value="leaf_write" />
+      <node concept="1zAUYm" id="22$xxOw9eFn" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOvZhmm" role="8PkJo">
+      <property role="TrG5h" value="visit_read" />
+      <node concept="1zAUYm" id="22$xxOvZhmn" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOw8LBJ" role="8PkJo">
+      <property role="TrG5h" value="visited_read" />
+      <node concept="1zAUYm" id="22$xxOw8LBK" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOvW84F" role="8PkJo">
+      <property role="TrG5h" value="live" />
+      <node concept="1zAUYm" id="22$xxOvW858" role="1zAUyy">
+        <property role="TrG5h" value="loc" />
+      </node>
+      <node concept="1zAUYm" id="22$xxOvW9lz" role="1zAUyy">
+        <property role="TrG5h" value="wsite" />
+      </node>
+      <node concept="1zAUYm" id="22$xxOvW85a" role="1zAUyy">
+        <property role="TrG5h" value="rsite" />
+      </node>
+      <node concept="1zAUYm" id="22$xxOvW85d" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOvYnTA" role="8PkJo">
+      <property role="TrG5h" value="read_backtrack" />
+      <node concept="1zAUYm" id="22$xxOvYnUh" role="1zAUyy">
+        <property role="TrG5h" value="loc" />
+      </node>
+      <node concept="1zAUYm" id="22$xxOvYnUj" role="1zAUyy">
+        <property role="TrG5h" value="rsite" />
+      </node>
+      <node concept="1zAUYm" id="22$xxOw4fG6" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOwa8TQ" role="8PkJo">
+      <property role="TrG5h" value="visited_read_backtrack" />
+      <node concept="1zAUYm" id="22$xxOwa8UO" role="1zAUyy">
+        <property role="TrG5h" value="rsite" />
+      </node>
+      <node concept="1zAUYm" id="22$xxOwa8UJ" role="1zAUyy">
+        <property role="TrG5h" value="node" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOvW85h" role="8PkJo">
+      <property role="TrG5h" value="unused" />
+      <node concept="1zAUYm" id="22$xxOvW85M" role="1zAUyy">
+        <property role="TrG5h" value="wsite" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOvWa_L" role="8PkJo">
+      <property role="TrG5h" value="foul" />
+      <node concept="1zAUYm" id="22$xxOvWaAq" role="1zAUyy">
+        <property role="TrG5h" value="rsite" />
+      </node>
+    </node>
+    <node concept="3AqmO8" id="22$xxOvW85O" role="8PkJo">
+      <property role="TrG5h" value="rw" />
+      <node concept="1zAUYm" id="22$xxOvW877" role="1zAUyy">
+        <property role="TrG5h" value="wsite" />
+      </node>
+      <node concept="1zAUYm" id="22$xxOvW879" role="1zAUyy">
+        <property role="TrG5h" value="rsite" />
+      </node>
+    </node>
     <node concept="3AqmO8" id="AoTMCCYnN1" role="8PkJo">
       <property role="TrG5h" value="trace_rw" />
     </node>
@@ -6521,32 +6288,32 @@
             </node>
             <node concept="3x8VRR" id="FAZzzisEq8" role="2OqNvi" />
           </node>
-          <node concept="9aQIb" id="FAZzzisEqX" role="9aQIa">
-            <node concept="3clFbS" id="FAZzzisEqY" role="9aQI4">
-              <node concept="1nLNNL" id="FAZzzisEr1" role="3cqZAp">
-                <node concept="1nLNMm" id="FAZzzisEr2" role="1nLNNK">
-                  <node concept="3Aq93q" id="FAZzzisEr5" role="1nLNMb">
+          <node concept="3eNFk2" id="22$xxOvWaJ5" role="3eNLev">
+            <node concept="3clFbS" id="22$xxOvWaJ6" role="3eOfB_">
+              <node concept="1nLNNL" id="22$xxOvWaJ7" role="3cqZAp">
+                <node concept="1nLNMm" id="22$xxOvWaJ8" role="1nLNNK">
+                  <node concept="3Aq93q" id="22$xxOvWaJ9" role="1nLNMb">
                     <property role="3ArMco" value="true" />
-                    <node concept="3I6sU6" id="FAZzzisEr6" role="3Ip0Jz">
-                      <node concept="3I6s7M" id="FAZzzisEra" role="3I6sU7">
-                        <node concept="3Aqt3T" id="FAZzzisEr9" role="3I6s78">
+                    <node concept="3I6sU6" id="22$xxOvWaJa" role="3Ip0Jz">
+                      <node concept="3I6s7M" id="22$xxOvWaJb" role="3I6sU7">
+                        <node concept="3Aqt3T" id="22$xxOvWaJc" role="3I6s78">
                           <ref role="3AqCNq" node="AoTMCCYnN1" resolve="trace_rw" />
                         </node>
                       </node>
                     </node>
                   </node>
-                  <node concept="3Aq9E8" id="FAZzzisErd" role="1nLNMd">
-                    <node concept="3I6sU6" id="FAZzzisEre" role="3Ip0Jz">
-                      <node concept="3I6s7M" id="FAZzzisEri" role="3I6sU7">
-                        <node concept="3Aqt3T" id="FAZzzisErh" role="3I6s78">
+                  <node concept="3Aq9E8" id="22$xxOvWaJd" role="1nLNMd">
+                    <node concept="3I6sU6" id="22$xxOvWaJe" role="3Ip0Jz">
+                      <node concept="3I6s7M" id="22$xxOvWaJf" role="3I6sU7">
+                        <node concept="3Aqt3T" id="22$xxOvWaJg" role="3I6s78">
                           <ref role="3AqCNq" node="5YmBCzQERyW" resolve="tr_readBad" />
-                          <node concept="3BlFb$" id="FAZzzisErn" role="3AunhB">
-                            <node concept="3A2sRY" id="FAZzzisErt" role="3BlFb_">
+                          <node concept="3BlFb$" id="22$xxOvWaJh" role="3AunhB">
+                            <node concept="3A2sRY" id="22$xxOvWaJi" role="3BlFb_">
                               <ref role="3A2yKK" node="6Yb9hAqNWuH" resolve="lvd" />
                             </node>
                           </node>
-                          <node concept="3BlFb$" id="FAZzzisEr$" role="3AunhB">
-                            <node concept="3A2sRY" id="FAZzzisErG" role="3BlFb_">
+                          <node concept="3BlFb$" id="22$xxOvWaJj" role="3AunhB">
+                            <node concept="3A2sRY" id="22$xxOvWaJk" role="3BlFb_">
                               <ref role="3A2yKK" node="6Yb9hAqNWuH" resolve="lvd" />
                             </node>
                           </node>
@@ -6557,6 +6324,9 @@
                 </node>
               </node>
             </node>
+            <node concept="3clFbT" id="22$xxOvWaJ_" role="3eO9$A">
+              <property role="3clFbU" value="false" />
+            </node>
           </node>
         </node>
       </node>
@@ -6576,16 +6346,6 @@
               <node concept="3I6sU6" id="6Yb9hAqRrMY" role="3Ip0Jz">
                 <node concept="3IrJb3" id="6Yb9hAqRrPA" role="3I6sU7">
                   <node concept="3clFbS" id="6Yb9hAqRrPB" role="3IrJb0">
-                    <node concept="3Aqczg" id="FAZzzioz$j" role="3cqZAp">
-                      <node concept="3Aqt3T" id="FAZzzioz$h" role="3Aqpz8">
-                        <ref role="3AqCNq" node="FAZzzinz_q" resolve="rwsite" />
-                        <node concept="3BlFb$" id="FAZzzioz$N" role="3AunhB">
-                          <node concept="3A2sRY" id="FAZzzioz$T" role="3BlFb_">
-                            <ref role="3A2yKK" node="6Yb9hAqNAzu" resolve="varref" />
-                          </node>
-                        </node>
-                      </node>
-                    </node>
                     <node concept="3clFbJ" id="6Yb9hAqR8ky" role="3cqZAp">
                       <node concept="3clFbS" id="6Yb9hAqR8k$" role="3clFbx">
                         <node concept="3Aqczg" id="6Yb9hAqRsjI" role="3cqZAp">
@@ -6686,5 +6446,72 @@
       </node>
     </node>
   </node>
+  <node concept="312cEu" id="7pxta7vc_Jb">
+    <property role="TrG5h" value="Util" />
+    <node concept="2tJIrI" id="7pxta7vc_Lt" role="jymVt" />
+    <node concept="2YIFZL" id="7pxta7vc_Mm" role="jymVt">
+      <property role="TrG5h" value="inc" />
+      <node concept="37vLTG" id="7pxta7vcD9v" role="3clF46">
+        <property role="TrG5h" value="res" />
+        <node concept="3uibUv" id="7pxta7veuuQ" role="1tU5fm">
+          <ref role="3uigEE" to="bj13:~Logical" resolve="Logical" />
+          <node concept="3uibUv" id="7pxta7veuvI" role="11_B2D">
+            <ref role="3uigEE" to="wyt6:~Integer" resolve="Integer" />
+          </node>
+        </node>
+      </node>
+      <node concept="37vLTG" id="7pxta7vcDbT" role="3clF46">
+        <property role="TrG5h" value="val" />
+        <node concept="3uibUv" id="7pxta7veuwy" role="1tU5fm">
+          <ref role="3uigEE" to="bj13:~Logical" resolve="Logical" />
+          <node concept="3uibUv" id="7pxta7veuxq" role="11_B2D">
+            <ref role="3uigEE" to="wyt6:~Integer" resolve="Integer" />
+          </node>
+        </node>
+      </node>
+      <node concept="10P_77" id="7pxta7vfnAR" role="3clF45" />
+      <node concept="3Tm1VV" id="7pxta7vc_Mp" role="1B3o_S" />
+      <node concept="3clFbS" id="7pxta7vc_Mq" role="3clF47">
+        <node concept="3clFbH" id="7pxta7vfODd" role="3cqZAp" />
+        <node concept="3clFbH" id="7pxta7vfODt" role="3cqZAp" />
+        <node concept="3clFbH" id="7pxta7vfODI" role="3cqZAp" />
+        <node concept="3Aqczg" id="7pxta7vd2fY" role="3cqZAp">
+          <node concept="3A8Hvi" id="7pxta7vd2fS" role="3Aqpz8">
+            <node concept="aZ4PW" id="7pxta7vd2hg" role="3A8wtg">
+              <node concept="37vLTw" id="7pxta7vd2iR" role="aZ4eD">
+                <ref role="3cqZAo" node="7pxta7vcD9v" resolve="res" />
+              </node>
+            </node>
+            <node concept="HKQnh" id="7pxta7vd2jE" role="3A8w4Q">
+              <node concept="3cpWs3" id="7pxta7vd4gl" role="HKQng">
+                <node concept="3cmrfG" id="7pxta7vd4h9" role="3uHU7w">
+                  <property role="3cmrfH" value="1" />
+                </node>
+                <node concept="2OqwBi" id="7pxta7veuyX" role="3uHU7B">
+                  <node concept="2OqwBi" id="7pxta7veuyY" role="2Oq$k0">
+                    <node concept="37vLTw" id="7pxta7veuyZ" role="2Oq$k0">
+                      <ref role="3cqZAo" node="7pxta7vcDbT" resolve="val" />
+                    </node>
+                    <node concept="liA8E" id="7pxta7veuz0" role="2OqNvi">
+                      <ref role="37wK5l" to="bj13:~Logical.findRoot():jetbrains.mps.logic.reactor.logical.Logical" resolve="findRoot" />
+                    </node>
+                  </node>
+                  <node concept="liA8E" id="7pxta7veuz1" role="2OqNvi">
+                    <ref role="37wK5l" to="bj13:~Logical.value():java.lang.Object" resolve="value" />
+                  </node>
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+        <node concept="3clFbF" id="7pxta7vfnCR" role="3cqZAp">
+          <node concept="3clFbT" id="7pxta7vfnCQ" role="3clFbG">
+            <property role="3clFbU" value="true" />
+          </node>
+        </node>
+      </node>
+    </node>
+    <node concept="3Tm1VV" id="7pxta7vc_Jc" role="1B3o_S" />
+  </node>
 </model>