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Proof step 19 from proof inv-flashsize-append (previous step)

# x = # lax, m0 = a.flashsize, ∀ n. n < # lax → lax[n].size = x[n].flashsize ⊦ ∀ n. ¬ # lax < n → (lax + @(m, m0) ')[n].size = (x + a ')[n].flashsize

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
# x = # lax, n ≤ # lax, ∀ n. n < # lax → lax[n].size = x[n].flashsize ⊦ (lax + @(m, a.flashsize) ')[n].size = (x + a ')[n].flashsize

Rule argument

Additional information

Used simplifier rules: ⊦ m < n ↔ ¬ n ≤ m; (ss)