Lemma hmac256drbgabs_generateWF I s n l K V RC el PR rsi (N:n>=0) (HI: Zlength (hmac256drbgabs_value I) = 32 /\ 0 <= hmac256drbgabs_reseed_counter I < Int.max_signed) (HRSI: 0 <= rsi +1< Int.max_signed) (G: hmac256drbgabs_generate I s n l = HMAC256DRBGabs K V RC el PR rsi): Zlength V = 32 /\ 0 <= RC < Int.max_signed.