proposition: Lemma eq_as_set_spec: forall {A} (l1 l2: list A), (forall x, In x l1 <-> In x l2) -> l1 ~= l2.
proof: Proof. intros. split; intro x; intros; specialize (H x); tauto. 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