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Proof step 20 from proof max-append (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 21:
∀ x0. max(x1 + x0) = max(x1) ∨ max(x1 + x0) = max(x0) ∨ x1 + x0 = [] ⊦ max(x1 + x0) = max(x1), x1 + x0 = [], max(x1 + x0) = max(x0), x1 = [], max(x1 + x0) < a, max(x1) < a

Proof step 20 from proof max-append (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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