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Proof step 1 from proof abs-nlinks-h (conclusion)

∀ ino. ¬ ino ∈ files ∨ ¬ ino ∈ dirs, ∀ ino. ⌜ino⌝ ∈ tree.fids → ino ∈ files, abs(tree, ino0)(dirs), ino1 ∈ files, ino0 ∈ dirs ⊦ ⌜ino1⌝ ∈ tree.fids ↔ links(ino1, dirs) ≠ ∅

System applied rule normalize

And obtained the following new goals

Proof step 2:
abs(tree, ino0)(dirs), ino0 ∈ dirs, ino1 ∈ files, ∀ ino. ⌜ino⌝ ∈ tree.fids → ino ∈ files, ∀ ino. ¬ ino ∈ files ∨ ¬ ino ∈ dirs ⊦ ⌜ino1⌝ ∈ tree.fids ↔ links(ino1, dirs) ≠ ∅

Proof step 1 from proof abs-nlinks-h (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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