| ⊦ sk ≠ _type ∧ sk ≠ _length ∧ r -- sk ∈ st0 → (onlyModified(r, st, st0[r -- sk, val]) ↔ onlyModified(r, st, st0)) |
r -- sk ∈ st0, r ∈ st0 ⊦ onlyModified(r, st, st0[r -- sk, val]) ↔ onlyModified(r, st, st0), sk = _length, sk = _type
[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st])]]