proposition: Lemma LocSetExistsEquals: forall x, exists y, x [=] y.
proof: Proof. intros. exists x. split;trivial. Qed.
imports: Coq(List) JML(Stack) Coq(ListSet) Coq(Bool) Coq(ZArith) Coq(Relation_Operators) JML(ListHelpers) Coq(Classical)