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Proof step 22 from proof putBar-rew (previous step)

is_indexkey(sk), j < i ∨ i + n→i(# bytes) ≤ j ⊦ sk = j ', (putByteArray(bytes, r, i, st)[r -- sk]) = (putByteArray(bytes, r, i, st[r -- j ', val])[r -- sk])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 9:
⊦ is_indexkey(sk) ↔ (∃ i. sk = i ')
Proof step 21:
∃ i. sk = i ', j < i ∨ i + n→i(# bytes) ≤ j ⊦ sk = j ', (putByteArray(bytes, r, i, st)[r -- sk]) = (putByteArray(bytes, r, i, st[r -- j ', val])[r -- sk])

Rule argument

[speclemmaarg: ,is_indexkey(sk) ↔ (∃ i. sk = i ') ,[sk] → [sk] ,F ,storekey , ,ex-04 ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (sk)]]