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Proof step 53 from proof inv-read (previous step)

err = ESUCCESS, dom of < ino, afs-cons(dirs, files), of-cons(of, dirs, files), fd ∈ of, n ≤ # buf ⊦ fd ∈ of ∧ (of[fd].mode ≠ MODE_R → fd ∈ of)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ ¬ fd ∈ of → of[fd] = (∅)[fd]; (s)