diff --git a/examples/mutualExclusionToken/selfstab-ring/why3session.xml b/examples/mutualExclusionToken/selfstab-ring/why3session.xml
index fc65260..79299a0 100644
--- a/examples/mutualExclusionToken/selfstab-ring/why3session.xml
+++ b/examples/mutualExclusionToken/selfstab-ring/why3session.xml
@@ -1,68 +1,55 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE why3session PUBLIC "-//Why3//proof session v5//EN"
-"http://why3.lri.fr/why3session.dtd">
+"https://www.why3.org/why3session.dtd">
 <why3session shape_version="6">
-<prover id="0" name="Z3" version="4.11.2" timelimit="5" steplimit="0" memlimit="1000"/>
+<prover id="0" name="Z3" version="4.11.2" timelimit="1" steplimit="0" memlimit="1000"/>
 <prover id="1" name="Alt-Ergo" version="2.4.2" timelimit="5" steplimit="0" memlimit="1000"/>
 <file format="whyml" proved="true">
 <path name=".."/><path name="selfstab-ring.mlw"/>
 <theory name="SelfStab_Ring" proved="true">
  <goal name="incre&#39;vc" expl="VC for incre" proved="true">
- <proof prover="1"><result status="valid" time="0.00" steps="4"/></proof>
+ <proof prover="1"><result status="valid" time="0.000000" steps="4"/></proof>
  </goal>
  <goal name="first_last_fl&#39;vc" expl="VC for first_last_fl" proved="true">
- <proof prover="1"><result status="valid" time="0.01" steps="63"/></proof>
+ <proof prover="1"><result status="valid" time="0.010000" steps="63"/></proof>
  </goal>
  <goal name="trans&#39;vc" expl="VC for trans" proved="true">
- <transf name="unfold" proved="true" arg1="inv">
-  <goal name="trans&#39;vc.0" expl="VC for trans" proved="true">
-  <transf name="split_all_full" proved="true" >
-   <goal name="trans&#39;vc.0.0" expl="postcondition" proved="true">
-   <proof prover="1"><result status="valid" time="1.20" steps="31957"/></proof>
-   </goal>
-   <goal name="trans&#39;vc.0.1" expl="postcondition" proved="true">
-   <proof prover="1"><result status="valid" time="0.01" steps="7"/></proof>
-   </goal>
-   <goal name="trans&#39;vc.0.2" expl="postcondition" proved="true">
-   <transf name="split_vc" proved="true" >
-    <goal name="trans&#39;vc.0.2.0" expl="postcondition" proved="true">
-    <proof prover="0" timelimit="300"><result status="valid" time="27.94" steps="125263123"/></proof>
-    </goal>
-   </transf>
-   </goal>
-   <goal name="trans&#39;vc.0.3" expl="postcondition" proved="true">
-   <proof prover="1"><result status="valid" time="0.35" steps="5731"/></proof>
-   </goal>
-   <goal name="trans&#39;vc.0.4" expl="postcondition" proved="true">
-   <proof prover="0"><result status="valid" time="0.05" steps="93192"/></proof>
-   </goal>
-   <goal name="trans&#39;vc.0.5" expl="postcondition" proved="true">
-   <proof prover="0"><result status="valid" time="0.10" steps="233571"/></proof>
-   </goal>
-   <goal name="trans&#39;vc.0.6" expl="postcondition" proved="true">
-   <proof prover="0"><result status="valid" time="1.69" steps="10123015"/></proof>
+ <transf name="split_vc" proved="true" >
+  <goal name="trans&#39;vc.0" expl="postcondition" proved="true">
+  <proof prover="0"><result status="valid" time="0.021446" steps="92842"/></proof>
+  </goal>
+  <goal name="trans&#39;vc.1" expl="postcondition" proved="true">
+  <proof prover="0"><result status="valid" time="0.058045" steps="341458"/></proof>
+  </goal>
+  <goal name="trans&#39;vc.2" expl="postcondition" proved="true">
+  <transf name="split_vc" proved="true" >
+   <goal name="trans&#39;vc.2.0" expl="postcondition" proved="true">
+   <proof prover="0"><result status="valid" time="0.079543" steps="653987"/></proof>
    </goal>
-   <goal name="trans&#39;vc.0.7" expl="postcondition" proved="true">
-   <proof prover="1"><result status="valid" time="1.62" steps="20200"/></proof>
+   <goal name="trans&#39;vc.2.1" expl="postcondition" proved="true">
+   <proof prover="0" timelimit="5" memlimit="2000"><result status="valid" time="2.140096" steps="21941721"/></proof>
    </goal>
   </transf>
   </goal>
+  <goal name="trans&#39;vc.3" expl="postcondition" proved="true">
+  <proof prover="1" timelimit="1"><result status="valid" time="0.053541" steps="1378"/></proof>
+  </goal>
  </transf>
  </goal>
  <goal name="Refinement.initWorldA&#39;refn&#39;vc" expl="VC for initWorldA&#39;refn" proved="true">
- <proof prover="1"><result status="valid" time="0.02" steps="146"/></proof>
+ <proof prover="1"><result status="valid" time="0.020000" steps="146"/></proof>
  </goal>
  <goal name="Refinement.initWorldC&#39;refn&#39;vc" expl="VC for initWorldC&#39;refn" proved="true">
- <proof prover="1"><result status="valid" time="0.10" steps="1196"/></proof>
+ <proof prover="1"><result status="valid" time="0.100000" steps="1225"/></proof>
  </goal>
  <goal name="Refinement.stepA&#39;refn&#39;vc" expl="VC for stepA&#39;refn" proved="true">
- <proof prover="1"><result status="valid" time="0.01" steps="27"/></proof>
+ <proof prover="1"><result status="valid" time="0.010000" steps="27"/></proof>
  </goal>
  <goal name="Refinement.stepC&#39;refn&#39;vc" expl="VC for stepC&#39;refn" proved="true">
- <proof prover="1"><result status="valid" time="0.01" steps="72"/></proof>
+ <proof prover="1"><result status="valid" time="0.010000" steps="72"/></proof>
  </goal>
  <goal name="oneToken" proved="true">
- <proof prover="1"><result status="valid" time="0.01" steps="23"/></proof>
+ <proof prover="1"><result status="valid" time="0.010000" steps="23"/></proof>
  </goal>
 </theory>
 </file>
diff --git a/examples/mutualExclusionToken/selfstab-ring/why3shapes.gz b/examples/mutualExclusionToken/selfstab-ring/why3shapes.gz
index 44bcb91..af6e291 100644
Binary files a/examples/mutualExclusionToken/selfstab-ring/why3shapes.gz and b/examples/mutualExclusionToken/selfstab-ring/why3shapes.gz differ