proposition: Lemma even_odd b1 b2 x1 x2: (ifb b1 (ifb b2 (2*x1+1 =? 2*x2+1) (2*x1+1 =? 2*x2)) (ifb b2 (2*x1 =? 2*x2+1) (2*x1 =? 2*x2))) -> ((implb b1 b2) && (implb b2 b1) && (x1 =? x2)).
proof: Proof. Proof using. verit. Qed.
imports: SMTCoq Bool PArray Int63 List ZArith