| ⊦ ubifs-cons(fs, ri, ro, fi, fo, log) ∧ dentrykey(ino, str) ∈ ri ∧ fs[ri[dentrykey(ino, str)]] = dentrynode(key, m) → ¬ inodekey(m) ∈ ro |
fs[ri[dentrykey(ino, str)]] = dentrynode(key, m), ubifs-cons(fs, ri, ro, fi, fo, log), inodekey(m) ∈ ro, dentrykey(ino, str) ∈ ri ⊦