proposition: Corollary length_ByteString_push_word : forall n (bs_front : word n) (bs' : ByteString), length_ByteString (ByteString_push_word bs_front bs') = n + length_ByteString bs'.
proof: Proof. induction n; simpl; intros; eauto. rewrite length_ByteString_push, IHn; eauto. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat Bedrock.Word Coq.ZArith.ZArith Coq.NArith.NArith Coq.Arith.Arith Coq.Numbers.Natural.Peano.NPeano Coq.Logic.Eqdep_dec Fiat.Narcissus.Common.Specs