| key0 < key1, key < key0 ⊦ key < key1 |
key = inodekey(ino), key < key0, key0 < key1 ⊦ key < key1
key = datakey(ino, ino0), key < key0, key0 < key1 ⊦ key < key1
key = dentrykey(ino, str), key < key0, key0 < key1 ⊦ key < key1
Used simplifier rules: key freely generated by inodekey, datakey, dentrykey;;