Hint Resolve closed_wrt_cmp_ptr closed_wrtl_cmp_ptr: closed.

(* Specifications: *)
Lemma closed_wrt_eval_id: forall S i,
~ S i -> closed_wrt_vars S (eval_id i).
Lemma closed_wrtl_eval_id: forall S i,
closed_wrt_lvars S (eval_id i).