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Proof step 4 from proof disk-layout-size-vol-orphans (previous step)

(5 + 2 * lptlebs(# lpt, LEB_SIZE)) + # lpt ≤ m3, m2 = 1 ∧ m3 = 3 ∧ m5 = 5 ∨ m2 = 2 ∧ m3 = 4 ∧ m5 = 5 + lptlebs(# lpt, LEB_SIZE) ⊦

User applied rule case distinction

And closed the goal!

Rule argument

pos: left 2

Additional information

Used simplifier rules: n0 < n ⊦ ¬ m + (* n) ≤ (* n0); (s)%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic%c: ⊦ m + n = n + m; from specification nat-basic