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Proof step 1 from proof rename-root (conclusion)

root.dir? ⊦ [posix_rename#(path, path', user, ofh; err, root, fs; psynced)] root.dir?

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 2:
⊦
Proof step 3:
err0 = err, root.dir? ⊦ [choose err with pre-renam(path, path', err, user, root, fs, ofh) in err0 := err; if err0 = ESUCCESS then let tree0 = root[path], psynced0 = path' ∈ root, tree = root[path'] in {root := (root -- path)[path', tree0]; if psynced0 ∧ ¬ tree.dir? ∧ ¬ tree.fid ∈ ofh.fids ∧ ¬ tree.fid ∈ root.fids then fs := fs -- tree.fid}; psynced := ?] root.dir?

Rule argument

pos: right 1

Additional information

Used simplifier rules: renam: ⊦ ;