| ∀ i. i ∈ ints → i ≤ max(ints), i = i ∨ i ∈ ints → i ≤ max(i ' + ints), ∀ i0. i0 ∈ ints → i0 ≤ max(i ' + ints) ⊦ ints = [], max(i ' + ints) = max(i, max(ints)) |
i ≤ max(i ' + ints), ∀ i0. i0 ∈ ints → i0 ≤ max(i ' + ints), ∀ i. i ∈ ints → i ≤ max(ints) ⊦ ints = [], max(i ' + ints) = max(i, max(ints))