proposition: Lemma exec_eff_app: forall h1 h2, exec_eff_hist (h1 ++ h2) = (exec_eff_hist h1) ++ (exec_eff_hist h2).
proof: Proof. intros. unfold exec_eff_hist. apply map_app. Qed.
imports: Coq(FunctionalExtensionality Arith Lia) Coq(Arith.Peano_dec Arith.Compare_dec) Coq(Relations.Relation_Operators) Coq(List) Chapar(Predefs)