def cnt.d81
import bend-osdev-acpi@0.1.1.0/PROOF.bend as PROOFimport Base
import bend-osdev-bytes@0.1.1.0/bytes.bend as B
1399def cnt.d81(+k: Nat, +lt: {Nat.is_lt(Nat.add(81n, k), 256n) == True{} : Bool}) -> {U32.to_nat(B.byte(U32.from_nat(Nat.add(81n, k)))) == Nat.add(81n, k) : Nat}:
1400 match k:
1401 case 0n:
1402 {==}
1403 case 1n+p:
1404 cnt.d82(p, lt)