proposition: Lemma weqb_correct {sz} : forall w1 w2: word sz, Word.weqb w1 w2 = false -> w1 <> w2.
proof: Proof. red; intros ??? Heq. rewrite <- weqb_true_iff in Heq. 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