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Proof step 63 from proof inv-unlink (previous step)

isdir ↔ false, isrename ↔ false, isdir1 ↔ isrename0, isdir0 ↔ isdir1, dent = negdentry(str), err = EACCESS, err0 = ESUCCESS, err1 = ESUCCESS, ino = ino1, inode = getinode(ino, dirs, files), ¬ isrename0, inode.directory, dom of < ino0, afs-cons(dirs, files), ispath(q, ROOT_INO, ino1, dirs, files), of-cons(of, dirs, files), pre-iget(ino, dirs, files), px-parent(user, q, ROOT_INO, dirs, files), ¬ px(user, inode.meta) ∨ ¬ pw(user, inode.meta) ⊦ ⟪skip⟫ (of-cons(of, dirs, files) ∧ afs-cons(dirs, files)), ¬ isdir ∧ isdir0

Heuristic symbolic execution applied rule skip right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ pre-iget(ino, dirs, files) ↔ valid-ino(ino, dirs, files); (s)% ⊦ valid-ino(ino, dirs, files) ↔ ino ∈ dirs ∨ ino ∈ files; (s)%⊦ getinode(ino, dirs, files) = (ino ∈ dirs ⊃ mkinode (ino, dirs[ino].meta, true, dirs[ino].nlink, dirs[ino].nsubdirs, dirs[ino].size) ;mkinode (ino, files[ino].meta, false, files[ino].nlink, 0, files[ino].size) ); (s)