proposition: Lemma gpaco2_step_gen clo r rg: gf (gpaco2 clo (rg \2/ r) (rg \2/ r)) <2= gpaco2 clo r rg.
proof: Proof. intros. econstructor. apply rclo2_base. left. pstep. eapply gf_mon. apply PR. intros. destruct PR0. eapply rclo2_mon. apply IN. intros. destruct PR0. - left. eapply paco2_mon. apply H. intros. destruct PR0; apply H0. - right. apply H. Qed.
imports: Program.Basics Paco(paco2 pacotac)