Theorem Lem12 : forall d : D, seq (ia Frame c2 (Tuple e0 d)) (alt (seq (ia one int i) (seq (ia Frame c3 (Tuple e0 d)) (seq (ia D s4 d) (X2 d)))) (seq (ia one int i) (seq (ia Frame c3 lce) (seq (ia frame c5 (tuple e1)) (seq (alt (seq (ia one int i) (ia frame c6 (tuple e1))) (seq (ia one int i) (ia frame c6 sce))) (X1 d)))))) = X1 d.