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Proof step 58 from proof inv-close (previous step)

err0 = err, root.dir?, fids-cons(root, fs, ofh) ⊦ ∃ err. pre-close(fd, err, user, root, fs, ofh)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 59:
root.dir?, fids-cons(root, fs, ofh) ⊦ ∃ err. pre-close(fd, err, user, root, fs, ofh)

Rule argument

Additional information