law bit_zero_div
import lawful-words@0.1.0.0/proof_bytes.bend as ProofBytesimport Base
import lawful-words@0.1.0.0/defs.bend as D
73# A word below 2^k has bit k clear.
74law bit_zero_div:
75 for +b: U32
76 for +k: Nat
77 for +h: {Nat.is_lt(U32.to_nat(b), Nat.pow(2n, k)) == True{} : Bool}
78 {D.bit(b, k) == False{} : Bool}