proposition: Lemma Subpath_refl: forall g p, Subpath g p p.
proof: Proof. intros. destruct p as [v p]. split. + apply incl_refl. + left; auto. Qed.
imports: Coq.Logic.ProofIrrelevance Coq.micromega.Lia CertiGraph.lib.Coqlib CertiGraph.lib.EnumEnsembles CertiGraph.lib.List_ext CertiGraph.lib.EquivDec_ext CertiGraph.graph.graph_model Coq.Lists.List Coq.Lists.ListDec