Replace use of get_l1_object by remove_level_2

Author: romainbrenguier

src/goto-symex/symex_goto.cpp

@@ -100,8 +100,10 @@ static optionalt<renamedt<exprt, L2>> try_evaluate_pointer_comparison(
   const ssa_exprt *ssa_symbol_expr =
     expr_try_dynamic_cast<ssa_exprt>(symbol_expr);
 
+  ssa_exprt l1_expr{*ssa_symbol_expr};
+  l1_expr.remove_level_2();
   const std::vector<exprt> value_set_elements = value_set.get_value_set(
-    ssa_symbol_expr->get_l1_object(), ns);
+    l1_expr, ns);
 
   bool constant_found = false;
 

src/util/ssa_expr.h

@@ -42,6 +42,7 @@ class ssa_exprt:public symbol_exprt
 
   irep_idt get_object_name() const;
 
+  /// TODO: this is not correct for array field sensitivity
   const ssa_exprt get_l1_object() const;
 
   const irep_idt get_l1_object_identifier() const;