| r -- i ' ∈ addarray(r, ty, 1 + i0, st), 0 ≤ i0, i < 0 ∨ i0 < i ⊦ i = 0, r -- i ' ∈ st |
⊦ is_fskey(sk) ∧ sk ≠ _length ∧ sk ≠ _type → (r -- sk ∈ addarray(r, ty, i, st) ↔ r -- sk ∈ st)
¬ (is_fskey(i ') ∧ i ' ≠ _length ∧ i ' ≠ _type), r -- i ' ∈ addarray(r, ty, 1 + i0, st), 0 ≤ i0, i < 0 ∨ i0 < i ⊦ i = 0, r -- i ' ∈ st
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, 1 + i0, ty, i ', r)]]