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Proof step 5 from proof inv-link (previous step)

p = p1, p0 = p2, afs-cons(dirs, files), of-cons(of, dirs, files) ⊦ ⟪choose old_dent, new_dent, inode, new_inode, c_inode with true in if p0 = ε ∨ p = ε then err := EISDIR else {let ino = ROOT_INO, dent = negdentry(p0.last), p0 = parent(p0) in {vfs_walk#(p0, user, dirs, files, asynced; ino, err); if err = ESUCCESS then vfs_may_link#(ino, user, dirs, files, asynced; inode, dent, err); c_inode := inode; old_dent := dent}; if err = ESUCCESS then let ino = ROOT_INO, dent = negdentry(p.last), p0 = parent(p) in {vfs_walk#(p0, user, dirs, files, asynced; ino, err); if err = ESUCCESS then vfs_may_create#(ino, dent, user, dirs, files, asynced; inode, err); new_inode := inode, new_dent := dent}; if err = ESUCCESS then afs_check_commit#(dirs, files; err; asynced); if err = ESUCCESS then afs_link#(old_dent; new_inode, c_inode, new_dent, err, dirs, files; asynced)}⟫ (of-cons(of, dirs, files) ∧ afs-cons(dirs, files))

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

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