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Proof step 1 from proof dir-not-open (conclusion)

⊦ of-cons(of, dirs, files) ∧ afs-cons(dirs, files) ∧ ino ∈ dirs → ¬ is-open(ino, of)

System applied rule normalize

And obtained the following new goals

Proof step 2:
afs-cons(dirs, files), is-open(ino, of), of-cons(of, dirs, files), ino ∈ dirs ⊦

Rule argument

Additional information