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Proof step 2 from proof abs-delorphans (previous step)

abs(tree, ROOT_INO)(dirs), ∀ ino. ⌜ino⌝ ∈ tree.fids → ino ∈ files, ∀ ino. ¬ ino ∈ files ∨ ¬ ino ∈ dirs ⊦ dirs \ orphans(dirs, files) = dirs

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information