(**************************************************************************)
(*     Sail                                                               *)
(*                                                                        *)
(*  Copyright (c) 2013-2017                                               *)
(*    Kathyrn Gray                                                        *)
(*    Shaked Flur                                                         *)
(*    Stephen Kell                                                        *)
(*    Gabriel Kerneis                                                     *)
(*    Robert Norton-Wright                                                *)
(*    Christopher Pulte                                                   *)
(*    Peter Sewell                                                        *)
(*    Alasdair Armstrong                                                  *)
(*    Brian Campbell                                                      *)
(*    Thomas Bauereiss                                                    *)
(*    Anthony Fox                                                         *)
(*    Jon French                                                          *)
(*    Dominic Mulligan                                                    *)
(*    Stephen Kell                                                        *)
(*    Mark Wassell                                                        *)
(*                                                                        *)
(*  All rights reserved.                                                  *)
(*                                                                        *)
(*  This software was developed by the University of Cambridge Computer   *)
(*  Laboratory as part of the Rigorous Engineering of Mainstream Systems  *)
(*  (REMS) project, funded by EPSRC grant EP/K008528/1.                   *)
(*                                                                        *)
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(*  are met:                                                              *)
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(*     notice, this list of conditions and the following disclaimer in    *)
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(*     distribution.                                                      *)
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(*  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''    *)
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(*  SUCH DAMAGE.                                                          *)
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module Big_int = Nat_big_num
open Ast
open Ast_util

val opt_smt_verbose : bool ref

val set_solver : string -> unit

type smt_result = Unknown | Sat | Unsat

val load_digests : unit -> unit
val save_digests : unit -> unit

val call_smt : l -> n_constraint -> smt_result

val solve_smt : l -> n_constraint -> kid -> Big_int.num option

val solve_all_smt : l -> n_constraint -> kid -> Big_int.num list option

val solve_unique_smt : l -> n_constraint -> kid -> Big_int.num option