renamed local variable to be distinct from global variable

Author: shazqadeer

Source/Model/Model.cs

@@ -874,7 +874,7 @@ public Element TryGet(string varname)
       public void AddBinding(string varname, Element value)
       {
         vars.Add(varname);
-        valuations.Add(varname, value);
+        valuations.Add(varname, value); // SQ: exception occurs if a global variable and a local variable have the same name
       }
 
       // Change name of the state

Test/civl/regression-tests/left-mover.bpl

@@ -1,6 +1,5 @@
 // RUN: %parallel-boogie "%s" > "%t"
 // RUN: %diff "%s.expect" "%t"
-// UNSUPPORTED: batch_mode
 
 var {:layer 0,2} x : int;
 
@@ -33,7 +32,7 @@ asserts {:add_to_pool "A", i+1} true;
   assume j > i;
 }
 
-pure action intro (x:int)
+pure action intro (k: int)
 {
-  assume x == 0;
+  assume k == 0;
 }