Use parameter instead of lookup for count

Author: romainbrenguier

src/goto-symex/symex_goto.cpp

@@ -412,8 +412,7 @@ void goto_symext::phi_function(
       if(obj_identifier==guard_identifier)
         return; // just a guard, don't bother
 
-      if(goto_state.level2_current_count(l1_identifier)==
-         dest_state.level2.current_count(l1_identifier))
+      if(goto_count == dest_count)
         return; // not at all changed
 
       // changed!
@@ -445,8 +444,7 @@ void goto_symext::phi_function(
         if(p_it != goto_state.propagation.end())
           goto_state_rhs=p_it->second;
         else
-          to_ssa_expr(goto_state_rhs).set_level_2(
-            goto_state.level2_current_count(l1_identifier));
+          to_ssa_expr(goto_state_rhs).set_level_2(goto_count);
       }
 
       {
@@ -455,8 +453,7 @@ void goto_symext::phi_function(
         if(p_it != dest_state.propagation.end())
           dest_state_rhs=p_it->second;
         else
-          to_ssa_expr(dest_state_rhs).set_level_2(
-            dest_state.level2.current_count(l1_identifier));
+          to_ssa_expr(dest_state_rhs).set_level_2(dest_count);
       }
 
       exprt rhs;