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Proof step 368 from proof inv-truncate-buff-none-cached (
previous step
)
⊦ key.data? ∧ key ∈ pcache ∧ (key.part * VFS_PAGE_SIZE < size ∨ ino ≠ key.ino) → truncate(ino, size, pcache)[key] = pcache[key]
A spec-lemma