⊦ i2b(i) = i2b(j) ↔ b2i(i2b(i)) = b2i(i2b(j))
i % 256 < ~128, i < 0, i < ~128 ⊦ b2i(i2b(~ i)) = b2i(i2b(~(i % 256))), i % 256 = 0
Used terms: ~(i % 256), ~ i