~128 ≤ i, i ≤ 127 ⊦ b2i(i2b((* i))) = i
¬(~128 ≤ i % b2i(by1) ∧ i % b2i(by1) ≤ 127) ⊦ b2i(by1) = 0, i % b2i(by1) = b2i(i2b(i % b2i(by1)))
Used terms: i % b2i(by1)