| (path∃(str, r, r0, st) ↔ path∃(str, r, r0, st1)) ∧ (path∃(str, r, r0, st) → unchangedNorec(r0, st, st1)) ⊦ (path∃(str, r, r0, st1) ↔ path∃(str, r, r0, st)) ∧ (path∃(str, r, r0, st1) → unchangedNorec(r0, st1, st)) |
path∃(str, r, r0, st1), path∃(str, r, r0, st), unchangedNorec(r0, st, st1) ⊦ unchangedNorec(r0, st1, st)
[[CONCRETESIMPRULES : ()]]