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Proof step 1 from proof disk-layout-avol-le-5 (conclusion)

m < 5, # avol = sb.main + mainareasize ⊦ disk-layout(sb, mainareasize) → (# avol ≤ (* m) ↔ false)

System applied rule normalize

And obtained the following new goals

Proof step 2:
# avol = sb.main + mainareasize, m < 5, disk-layout(sb, mainareasize) ⊦ # avol ≤ m ↔ false

Rule argument

Additional information