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Proof step 21 from proof max-append (previous step)

∀ x0. x1 + x0 = [] ∨ max(x1 + x0) = max(x0) ∨ max(x1 + x0) = max(x1) ⊦ x1 + x0 = [], max(x1 + x0) = max(x0), max(x1 + x0) = max(x1), x1 = [], max(x1 + x0) < a, max(x1) < a

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 22:
∀ x0. x1 + x0 = [] ∨ max(x1 + x0) = max(x0) ∨ max(x1 + x0) = max(x1) ⊦ x1 + x0 = [], max(x1 + x0) = max(x1), max(x1 + x0) = max(x0), x1 = [], max(x1) < a, max(x1 + x0) < a

Proof step 21 from proof max-append (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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