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Proof step 2 from proof ubifs-file-in (previous step)

ubifs-cons(fs, ri, ro, fi, fo, log), datakey(ino, n) ∈ ri ⊦ inodekey(ino) ∈ ri

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
ubifs-cons(fs, ri, ro, fi, fo, log), datakey(ino, n) ∈ ri ⊦ fs[(∅)[inodekey(ino)]].directory, inodekey(ino) ∈ ri

Rule argument

Additional information

Used simplifier rules: ubifs-file-notdir: ⊦ datakey(ino, n) ∈ ri ∧ ubifs-cons(fs, ri, ro, fi, fo, log) → ¬ fs[ri[inodekey(ino)]].directory;% ⊦ ¬ key ∈ ri → ri[key] = (∅)[key]; (s)