| sk ∈ fis, sk ∈ fis, ∀ r, fis, class, st. update(r, fis, addobj(r, class, fis1, st)) = addobj(r, class, fis + fis1, st) ⊦ update(r, fis, addobj(r, class, fis1, st)) = addobj(r, class, fis + fis1, st) |
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r, fis, class, st)]]