proposition: Lemma Forall_tails_app {A P} (ls ls' : list A) (H : Forall_tails P (ls ++ ls')) : Forall_tails P ls'.
proof: Proof. induction ls; simpl in *; trivial. destruct H; auto. Defined.
imports: Fiat.Common.Coq__8_4__8_5__Compat Coq.ZArith.ZArith Coq.Lists.List Coq.Lists.SetoidList Coq.Bool.Bool Fiat.Common Fiat.Common.List.Operations Fiat.Common.Equality Fiat.Common.List.FlattenList Fiat.Common.LogicFacts