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Proof step 3 from proof add-at-other-index (previous step)

n→i(# vals) ≤ i, 0 ≤ i ⊦ (addarray(r, ty, vals, st)[r -- i ']) = st[r -- i ']

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ n→i(# vals) ≤ i → (addarray(r, ty, vals, st)[r -- i ']) = st[r -- i ']

Rule argument

[crewrite-arg: add-at-gr , F , [i, st, vals, ty, r] → [i, st, vals, ty, r] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (i, st, vals, ty, r)]]