proposition: Lemma gpaco0_step_gen clo r rg: gf (gpaco0 clo (rg \0/ r) (rg \0/ r)) <0= gpaco0 clo r rg.
proof: Proof. intros. econstructor. apply rclo0_base. left. pstep. eapply gf_mon. apply PR. intros. destruct PR0. eapply rclo0_mon. apply IN. intros. destruct PR0. - left. eapply paco0_mon. apply H. intros. destruct PR0; apply H0. - right. apply H. Qed.
imports: Program.Basics Paco(paco0 pacotac)