i % 256 < ~128, i < 0, i % 256 < 0 ⊦ b2i(i2b(i)) = i % 256 + 256
Used simplifier rules: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward)% ⊦ i < (* j) ∧ j < 0 → i < 0; (forward)