sig
module Lit = BBox.Lit
exception UndecidedLit
type clause = Lit.t list
val add_clause : proof:Sat_solver_intf.proof_step -> Lit.t list -> unit
val add_clauses :
proof:Sat_solver_intf.proof_step -> Lit.t list list -> unit
val add_clause_seq :
proof:Sat_solver_intf.proof_step -> Lit.t list Sequence.t -> unit
val check : unit -> Sat_solver_intf.result
val last_result : unit -> Sat_solver_intf.result
val valuation : Lit.t -> bool
val valuation_level : Lit.t -> bool * int
val proved_at_0 : Lit.t -> bool option
val set_printer : Lit.t CCFormat.printer -> unit
val get_proof : unit -> Sat_solver_intf.proof
val get_proof_of_lit : Lit.t -> Sat_solver_intf.proof
val setup : unit -> unit
type save_level
val root_save_level : Sat_solver_intf.S.save_level
val save : unit -> Sat_solver_intf.S.save_level
val restore : Sat_solver_intf.S.save_level -> unit
end