def ctr_stream_exact_length
import qasim-bend-kit@0.1.0.2/proof/AES_ZipLengthProof.bend as AESZipLengthProofimport Base
import qasim-bend-kit@0.1.0.2/libs/AES256GCMCore.bend as Core
172def ctr_stream_exact_length(+fuel: Nat, +words: List<&2, U32>,
173 +start: List<&2, U32>) ->
174 {List.length(&2, U32,
175 Core.gcm_ctr_stream_exact(fuel, words, start)) == fuel : Nat}:
176 ctr_stream_exact_go_length(fuel, words, start, Nil{})