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Proof step 4 from proof getbar-put (previous step)

is_fskey(sk) ⊦ getbytearray(r, i, j, st[r -- sk, val]) = getbytearray(r, i, j, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ is_fskey(sk) ↔ (∃ fs. sk = fs ')
Proof step 3:
⊦ getbytearray(r, i, j, st[r0 -- fs ', val]) = getbytearray(r, i, j, st)

Rule argument

[speclemmaarg: ,is_fskey(sk) ↔ (∃ fs. sk = fs ') ,[sk] → [sk] ,F ,storekey , ,ex-03 ]

Additional information

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