Dolmen_model.Bitv************************************************************************
val mk : int -> Z.t -> Value.tmk n z Bitvector of size n, and bits z creation.
val builtins : Env.builtinsbuiltins for bitvectors
val ubitv : int -> Value.t -> Z.tExtract the value as an unsigned integer
val sbitv : int -> Value.t -> Z.tExtract the value as a signed integer