~128 ≤ i, i % 256 < ~128, i < 0, i % 256 < 0 ⊦ i = i % 256 + 256
Used simplifier rules: ⊦ j ≤ i ∧ i < 0 → j < 0; (forward)% ⊦ i < 0 ∧ 0 ≤ j → i ≤ j;