proposition: Lemma split2_wzero: forall sz sz' : nat, split2 sz sz' (wzero (sz + sz')) = wzero sz'.
proof: Proof. intros; rewrite <- !wzero'_def. induction sz. - reflexivity. - simpl; f_equal; congruence. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat List Bedrock.Word Coq.ZArith.ZArith Coq.micromega.Psatz NArith NArithRing ZArith ZArithRing Program Coq.micromega.Psatz AlignedByteString Permutation