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Proof step 30 from proof recovery (
previous step
)
∀ ino. ¬ ino ∈ files ∨ ¬ ino ∈ dirs, ∀ ino. ⌜ino⌝ ∈ tree.fids → ino ∈ files, abs(tree, ROOT_INO)(dirs) ⊦ dirs \ orphans(dirs, files) = dirs
A spec-lemma