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Proof step 2 from proof at-put-keys-04 (previous step)

⊦ str = str0, (st[r -- (sk ' + mkfs(class, ty, str .field) ' '), val][r0 -- mkfs(class0, ty0, str0 .field) ']) = st[r0 -- mkfs(class0, ty0, str0 .field) ']

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
str ≠ str0 ⊦ (st[r -- (sks + mkfs(class, ty, ((* str)) .field) ' '), val][r0 -- mkfs(class0, ty0, ((* str0)) .field) ']) = st[r0 -- mkfs(class0, ty0, str0 .field) ']

Rule argument

[crewrite-arg: at-put-keys , F , [str0, ty0, class0, r0, val, str, ty, class, sks, r, st] → [str0, ty0, class0, r0, val, str, ty, class, sk ', r, st] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (str0, ty0, class0, r0, val, str, ty, class, sk ', r, st)]]