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Proof step 2 from proof okarrays-put-03 (previous step)

is_fskey(rk .key) ⊦ rk .key = _type, rk .key = _length, okarrays(r, fis, st[rk, val]) ↔ okarrays(r, fis, st), rk .key ∈ fis

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 1:
⊦ ¬ sk ∈ fis ∧ sk ≠ _type ∧ sk ≠ _length ∧ is_fskey(sk) → (okarrays(r, fis, st[r0 -- sk, val]) ↔ okarrays(r, fis, st))

Rule argument

[speclemmaarg: ,r = rk .ref ∧ sk = rk .key ↔ rk = r -- sk ,[rk, r, sk] → [rk, r0, sk] ,T ,refkey , ,elim ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ r = rk .ref ∧ sk = rk .key ↔ rk = r -- sk])], [EXTRATERMS : (rk, r0, sk)]]