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Proof step 23 from proof eq-io-lookup (previous step)

dirs1[pageno] = mkdir(m, md, m0, m1, entries), pageno ∈ dirs1, links(pageno, dirs1) ≠ ∅ ∨ pageno = ROOT_INO ⊦ ⟨err := ENOENT⟩ (negdentry(dent.name) = negdentry(dent.name) ∧ err = ENOENT), ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ (dent = negdentry(dent.name) ∧ err = ENOENT), dent.name ∈ entries

Heuristic symbolic execution applied rule assign right

And closed the goal!

Rule argument

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