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Proof step 4 from proof isarrayref-put (conclusion)

⊦ is_fskey(rk .key) → (is_arrayref(r, i, st[rk, val]) ↔ is_arrayref(r, i, st))

User applied rule structural induction

And obtained the following new goals

Proof step 3:
⊦ is_fskey((r0 -- sk) .key) → (is_arrayref(r, i, st[r0 -- sk, val]) ↔ is_arrayref(r, i, st))

Rule argument

[VARWITHVARSEQSARG : rk, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : refkey generated by --;])]]