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Proof step 1 from proof ubifs-log-nodups-add4 (conclusion)

⊦ ubifs-cons(fs, ri, ro, fi, fo, log) ∧ ¬ adr0 ∈ fs ∧ ¬ adr1 ∈ fs ∧ ¬ adr2 ∈ fs ∧ ¬ adr3 ∈ fs ∧ adr0 ≠ adr1 ∧ adr0 ≠ adr2 ∧ adr1 ≠ adr2 ∧ adr0 ≠ adr3 ∧ adr1 ≠ adr3 ∧ adr2 ≠ adr3 → ¬ dups(log + adr0 ' + adr1 ' + adr2 ' + adr3 ')

System applied rule normalize

And obtained the following new goals

Proof step 2:
dups(log + adr0 ' + adr1 ' + adr2 ' + adr3 '), ubifs-cons(fs, ri, ro, fi, fo, log) ⊦ adr0 = adr3, adr0 = adr2, adr0 = adr1, adr1 = adr3, adr1 = adr2, adr2 = adr3, adr3 ∈ fs, adr2 ∈ fs, adr1 ∈ fs, adr0 ∈ fs

Proof step 1 from proof ubifs-log-nodups-add4 (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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