proposition: Lemma gpaco2_gen_guard clo r rg: gpaco2 clo r (rg \2/ r) <2= gpaco2 clo r rg.
proof: Proof. intros. destruct PR. econstructor. eapply rclo2_mon. apply IN. intros. destruct PR; [|right; apply H]. left. eapply paco2_mon_gen; intros. apply H. apply PR. destruct PR. apply H0. right. apply H0. Qed.
imports: Program.Basics Paco(paco2 pacotac)