Lemma HMAC256_DRBG_generate_algorithmWF a v k rc n l bytes V K RC (N:n >=0)
(A: 0<= a +1< Int.max_signed) (Rc: 0<=rc)
(H: DRBG_functions.generate_algorithm_success bytes (V, K, RC) =
HMAC256_DRBG_functional_prog.HMAC256_DRBG_generate_algorithm a (v,k,rc) n l):
Zlength V = 32 /\ 0 <= RC < Int.max_signed.