| reachable-n(H, 2 * m + 2 * n1, r, r1), m * n = n1 + m, reachable-n(H, m0 * n, r1, r1), reachable-n(H, n, r2, r2), reachable-n(H, n + m, r, r2), reachable-n(H, n1 + m, r, r1), reachable-n(H, m, r, r2), ∀ n0. reachable-n(H, m + n0 * n, r, r2) ⊦ n = 0, m = 0, reachable-n(H, 2 * (n1 + m), r, r1) |
⊦ m0 * m + m0 * n = m0 * (m + n)
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ m + n = n + m], [CSIMPSEQ : ⊦ m * n = n * m])], [EXTRATERMS : (n1, m, 2)]]