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Proof step 21 from proof inv-check-commit (previous step)

fs[ri[key]].key = key, as ∩ range ri = ∅, fo.inodes?, ro.inodes?, file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, ro), replay-cons-strong(fs, ri, ro, fi, fo, log), ri-inj(fi), ri-inj(ri), ubifs-cons(fs, ri, ro, fi, fo, log), ri[inodekey(key.ino)] ∈ as, key ∈ ri, ri[key] ∈ fs, key.inode? → fs[ri[key]].inode? ∧ key.ino ≠ 0, key.dentry? → fs[ri[key]].dentry? ∧ inodekey(key.ino) ∈ ri ∧ inodekey(fs[ri[key]].ino) ∈ ri ∧ ¬ inodekey(key.ino) ∈ ro ∧ ¬ inodekey(fs[ri[key]].ino) ∈ ro ∧ fs[ri[inodekey(key.ino)]].directory, key.data? → fs[ri[key]].data? ∧ inodekey(key.ino) ∈ ri ∧ ¬ fs[ri[inodekey(key.ino)]].directory ∧ # fs[ri[key]].data = VFS_PAGE_SIZE ⊦ # as = 0, as = ∅, inodekey(key.ino) ∈ ri, (fs \ as)[ri[key]].key = key ∧ (key.inode? → (fs \ as)[ri[key]].inode? ∧ key.ino ≠ 0) ∧ ( key.dentry? → (fs \ as)[ri[key]].dentry? ∧ inodekey(key.ino) ∈ ri ∧ inodekey((fs \ as)[ri[key]].ino) ∈ ri ∧ ¬ inodekey(key.ino) ∈ ro ∧ ¬ inodekey((fs \ as)[ri[key]].ino) ∈ ro ∧ (∅)[ri[inodekey(key.ino)]].directory) ∧ ( key.data? → (fs \ as)[ri[key]].data? ∧ inodekey(key.ino) ∈ ri ∧ ¬ (∅)[ri[inodekey(key.ino)]].directory ∧ # (fs \ as)[ri[key]].data = VFS_PAGE_SIZE)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: ⊦ ¬ key ∈ ri → ri[key] = (∅)[key]; (s)