| reachable-n(H, m, r, r0), reachable-n(H, m + n * n0, r, r0) ⊦ n0 = 0, ∃ r0. reachable-n(H, n, r, r0) |
reachable-n(H, n, r, r0), m < n ⊦ ∃ r1. reachable-n(H, m, r, r1) ∧ reachable-n(H, n - m, r1, r0)
reachable-n(H, m, r, r0), reachable-n(H, m + n * n0, r, r0) ⊦ n < m + n * n0, n0 = 0, ∃ r0. reachable-n(H, n, r, r0)
∃ r1. reachable-n(H, n, r, r1) ∧ reachable-n(H, m + n * n0 - n, r1, r0), reachable-n(H, m, r, r0), reachable-n(H, m + n * n0, r, r0) ⊦ n0 = 0, ∃ r0. reachable-n(H, n, r, r0)
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (H, m + n * n0, r, r0, n)]]