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Proof step 4 from proof in-put-keys-02 (conclusion)

str ≠ str0 ⊦ r0 -- mkfs(class, ty, ((* str)) .field) ' ∈ st[r -- (sks + mkfs(class0, ty0, ((* str0)) .field) ' '), val] ↔ r0 -- mkfs(class, ty, str .field) ' ∈ st

Special step normalize

And obtained the following new goals

Proof step 3:
str ≠ str0 ⊦ r0 -- mkfs(class, ty, str .field) ' ∈ st[r -- (sks + mkfs(class0, ty0, str0 .field) ' '), val] ↔ r0 -- mkfs(class, ty, str .field) ' ∈ st