(* This file used to test the `romega` tactics. In Coq 8.9 (end of 2018), these tactics are deprecated. The tests in this file remain but now call the `lia` tactic. *)
(* Submitted by Xavier Urbain 18 Jan 2002 *)

Lemma lem1 :
forall x y : Z, (-5 < x < 5)%Z -> (-5 < y)%Z -> (-5 < x + y + 5)%Z.