proposition: Lemma nat_inc_list_length: forall n, length (nat_inc_list n) = n.
proof: Proof. induction n; simpl; auto. rewrite app_length. simpl. rewrite IHn. lia. Qed.
imports: Coq.Lists.List Coq.micromega.Lia Coq.Sorting.Permutation Coq.ZArith.ZArith_base Coq.ZArith.Zcomplements Coq.Logic.FunctionalExtensionality CertiGraph.lib.Coqlib CertiGraph.lib.EquivDec_ext VST.zlist.sublist VST.zlist.list_solver