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Proof step 1 from proof inv-rmdir (conclusion)

root.dir?, fids-cons(root, fs, ofh) ⊦ ⟪posix_rmdir#(path, user, fs, ofh; err, root; psynced)⟫ (root.dir? ∧ fids-cons(root, fs, ofh))

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 2:
⊦
Proof step 3:
err0 = err, root.dir?, fids-cons(root, fs, ofh) ⊦ ⟪choose err with pre-rmdir(path, err, user, root, fs, ofh) in err0 := err; if err0 = ESUCCESS then root := root -- path; psynced := ?⟫ (root.dir? ∧ fids-cons(root, fs, ofh))

Rule argument

pos: right 1

Additional information

Used simplifier rules: rmdir: ⊦ ;