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Proof step 2 from proof datanode-pagesize (previous step)

ubifs-cons(fs, ri, ro, fi, fo, log), datakey(m, n) ∈ ri ⊦ # fs[ri[datakey(m, n)]].data = VFS_PAGE_SIZE

Heuristic simplifier applied rule simplifier

And obtained the following new goals

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

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;%ubifs-file-in: ⊦ datakey(ino, n) ∈ ri ∧ ubifs-cons(fs, ri, ro, fi, fo, log) → inodekey(ino) ∈ ri;