proposition: Lemma gpaco1_gen_guard clo r rg: gpaco1 clo r (rg \1/ r) <1= gpaco1 clo r rg.
proof: Proof. intros. destruct PR. econstructor. eapply rclo1_mon. apply IN. intros. destruct PR; [|right; apply H]. left. eapply paco1_mon_gen; intros. apply H. apply PR. destruct PR. apply H0. right. apply H0. Qed.
imports: Program.Basics Paco(paco1 pacotac)