proposition: Lemma Zlt_Zmin: forall x y, x < y -> Z.min x y = x.
proof: Proof. intros. rewrite Zmin_spec. destruct (zlt x y); lia. Qed.
imports: VST.floyd.proofauto CertiGraph.lib.EquivDec_ext CertiGraph.lib.List_ext CertiGraph.lib.find_lemmas CertiGraph.graph.graph_model CertiGraph.graph.graph_gen CertiGraph.graph.graph_relation CertiGraph.graph.undirected_graph CertiGraph.graph.MathAdjMatGraph