| reachable-n(H, m, r0, r0), reachable-n(H, 2 ^ n - 1, r, r0), m ≤ 2 ^ n ⊦ m = 0, cyclic(r, H) |
2 ^ n = m0 + 1 ∧ 2 ^ n ≠ 0, reachable-n(H, m, r0, r0), reachable-n(H, m0, r, r0), m ≤ 2 ^ n ⊦ m = 0, cyclic(r, H)
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ 2 ^ n ≠ 0], [CSIMPELIM : n ≠ 0 ⊦ m = n - 1 ↔ n = m + 1])], [EXTRATERMS : (2 ^ n, m0)]]