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Proof step 2 from proof add-at-04 (previous step)

is_fskey(sk) ⊦ sk = _length, sk = _type, (addarray(r, ty, vals, st)[r0 -- sk]) = st[r0 -- sk]

User applied rule structural induction

And obtained the following new goals

Proof step 1:
fs ' ≠ _type, fs ' ≠ _length ⊦ (addarray(r0, ty, vals, st)[r -- fs ']) = st[r -- fs ']

Rule argument

[VARWITHVARSEQSARG : sk, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : storekey generated by ', ';], [CSIMPSEQ : ⊦ _length ≠ i '], [CSIMPSEQ : ⊦ _type ≠ i '], [CSIMPSEQ : ⊦ ¬ is_fskey(i ')])]]