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Proof step 23 from proof putBar-rew (previous step)

¬ is_fskey(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])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 22:
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])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_fskey(sk) ↔ is_indexkey(sk)])]]