proposition: Lemma guarded_si_weaken: forall (PV1 PV2: V -> Prop) (PE1 PE2: E -> Prop), Included PV2 PV1 -> Included PE2 PE1 -> inclusion PGraph (guarded_structurally_identical PV1 PE1) (guarded_structurally_identical PV2 PE2).
proof: Proof. intros. hnf; intros. rewrite guarded_si_spec in H1 |- *. unfold Included, Ensembles.In in H, H0. firstorder. Qed.
imports: Coq.Logic.ProofIrrelevance Coq.Sets.Ensembles Coq.Sets.Finite_sets Coq.Classes.Morphisms CertiGraph.lib.Coqlib CertiGraph.lib.Ensembles_ext CertiGraph.lib.relation_list CertiGraph.lib.List_ext CertiGraph.lib.Equivalence_ext CertiGraph.lib.EquivDec_ext VST.msl.Coqlib2 Coq.Lists.List CertiGraph.graph.graph_model CertiGraph.graph.path_lemmas CertiGraph.graph.reachable_ind CertiGraph.graph.graph_gen