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Proof step 2 from proof data-ubifs-cons (previous step)

ubifs-cons(fs, ri, ro, fi, fo, log), datakey(ino, n) ∈ ri, ri[datakey(ino, n)] ∈ fs ⊦ fs[ri[datakey(ino, n)]].data?

Heuristic simplifier applied rule simplifier

And obtained the following new goals

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

Rule argument

Additional information

Used simplifier rules: ubifs-file-in: ⊦ datakey(ino, n) ∈ ri ∧ ubifs-cons(fs, ri, ro, fi, fo, log) → inodekey(ino) ∈ ri; (forward) from specification aubifs-inv%ubifs-file-notdir: ⊦ datakey(ino, n) ∈ ri ∧ ubifs-cons(fs, ri, ro, fi, fo, log) → ¬ fs[ri[inodekey(ino)]].directory; (forward) from specification aubifs-inv