| ino = LEB_SIZE ⊦ ⟪vfs_format#(n, isdir0, ino, md; dirs, files, asynced; of, ino0, err)⟫ ( ( err = ESUCCESS → ⟨posix_format#(n, isdir0, ino, md; ; root, fs0, ofh0, psynced, err0)⟩ ((ofh0 = abs-of(of) ∧ fs0 = abs-files(files) ∧ abs(root, ROOT_INO)(dirs) ∧ (psynced → asynced)) ∧ err = err0)) ∧ ( err ≠ ESUCCESS → (∀ tree, fs, ofh, isdir. ⟨posix_format#(n, isdir0, ino, md; ; root, fs0, ofh0, psynced, err0)⟩ (tree = root ∧ fs = fs0 ∧ ofh = ofh0 ∧ (isdir ↔ psynced) ∧ err = err0)))) |