Definition check_gvars_spec (GV: option globals) (GV': option globals) : Prop :=
  match GV' with Some _ => GV = GV' | _ => True end.Definition strong_cast (t1 t2: type) (v: val) : val :=
 force_val (sem_cast t1 t2 v).

Lemma ve_of_make_args: forall i fl vl rho , length fl = length vl -> Map.get (ve_of (make_args fl vl rho)) i = None.