⊦ (a[r =>_] * R)[rs, f, g] ∧ a ≠ a0 → (¬ rely(a0, rs, f, g, rs, f(r ; o), g) ↔ false)
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (R, a, o0, r, g, f, rs, a0)]]