proposition: Lemma gpaco6_step_gen clo r rg: gf (gpaco6 clo (rg \6/ r) (rg \6/ r)) <6= gpaco6 clo r rg.
proof: Proof. intros. econstructor. apply rclo6_base. left. pstep. eapply gf_mon. apply PR. intros. destruct PR0. eapply rclo6_mon. apply IN. intros. destruct PR0. - left. eapply paco6_mon. apply H. intros. destruct PR0; apply H0. - right. apply H. Qed.
imports: Program.Basics Paco(paco6 pacotac)