(* $Id: orderings.ml 9869 2009-06-11 22:52:38Z denes $ *)
-let debug s = prerr_endline s ;;
+let debug s = prerr_endline (Lazy.force s) ;;
let debug _ = ();;
let monster = 100;;
-module Paramod (B : Terms.Blob) = struct
+module type Paramod =
+ sig
+ type t
+ type szsontology =
+ | Unsatisfiable of (t Terms.bag * int * int list) list
+ | GaveUp
+ | Error of string
+ | Timeout of int * t Terms.bag
+ val paramod :
+ useage:bool ->
+ max_steps:int ->
+ print_problem:bool ->
+ ?timeout:float ->
+ t Terms.foterm * (t Terms.foterm list * t Terms.foterm list) ->
+ (t Terms.foterm * (t Terms.foterm list * t Terms.foterm list)) list -> szsontology
+ end
+
+module Paramod (B : Orderings.Blob) = struct
+ type t = B.t
type szsontology =
| Unsatisfiable of (B.t Terms.bag * int * int list) list
| GaveUp
exception Stop of szsontology
type bag = B.t Terms.bag * int
module Pp = Pp.Pp (B)
- module FU = FoUnif.Founif(B)
+ module FU = FoUnif.FoUnif(B)
module IDX = Index.Index(B)
module Sup = Superposition.Superposition(B)
module Utils = FoUtils.Utils(B)
- module Order = Orderings.Orderings(B)
+ module Order = B
+ module Clauses = Clauses.Clauses(B)
module WeightOrderedPassives =
struct
type t = B.t Terms.passive_clause
- let compare = Utils.compare_passive_clauses_weight
+ let compare = Clauses.compare_passive_clauses_weight
end
module AgeOrderedPassives =
struct
type t = B.t Terms.passive_clause
- let compare = Utils.compare_passive_clauses_age
+ let compare = Clauses.compare_passive_clauses_age
end
module WeightPassiveSet = Set.Make(WeightOrderedPassives)
let add_passive_clause ?(no_weight=false) (passives_w,passives_a) cl =
let cl = if no_weight then (0,cl)
- else Utils.mk_passive_clause cl in
+ else Clauses.mk_passive_clause cl in
WeightPassiveSet.add cl passives_w, AgePassiveSet.add cl passives_a
;;
let add_passive_goal ?(no_weight=false) (passives_w,passives_a) g =
let g = if no_weight then (0,g)
- else Utils.mk_passive_goal g in
+ else Clauses.mk_passive_goal g in
WeightPassiveSet.add g passives_w, AgePassiveSet.add g passives_a
;;
else WeightPassiveSet.min_elt passives_w
;;
- let mk_clause bag maxvar (t,ty) =
- let (proof,ty) = B.saturate t ty in
- let c, maxvar = Utils.mk_unit_clause maxvar ty proof in
- let bag, c = Terms.add_to_bag c bag in
- (bag, maxvar), c
- ;;
-
- let mk_passive (bag,maxvar) = mk_clause bag maxvar;;
- let mk_goal (bag,maxvar) = mk_clause bag maxvar;;
-
(* TODO : global age over facts and goals (without comparing weights) *)
let select ~use_age passives g_passives =
if is_passive_set_empty passives then begin
(false,cl,remove_passive_clause passives cl,g_passives)
else
let g_cl = pick_min_passive ~use_age:use_age g_passives in
- let (id1,_,_,_),(id2,_,_,_) = snd cl, snd g_cl in
+ let (id1,_,_,_,_),(id2,_,_,_,_) = snd cl, snd g_cl in
let cmp = if use_age then id1 <= id2
else fst cl <= fst g_cl
in
let backward_infer_step bag maxvar actives passives
g_actives g_passives g_current iterno =
(* superposition left, simplifications on goals *)
- debug "infer_left step...";
+ debug (lazy "infer_left step...");
let bag, maxvar, new_goals =
Sup.infer_left bag maxvar g_current actives
in
- debug "Performed infer_left step";
+ debug (lazy "Performed infer_left step");
let bag = Terms.replace_in_bag (g_current,false,iterno) bag in
bag, maxvar, actives, passives, g_current::g_actives,
(add_passive_goals g_passives new_goals)
* new = supright e'' A'' *
* new'= demod A'' new *
* P' = P + new' *)
- debug "Forward infer step...";
+ debug (lazy "Forward infer step...");
+ debug (lazy("Number of actives : " ^ (string_of_int (List.length (fst actives)))));
let bag, maxvar, actives, new_clauses =
Sup.infer_right bag maxvar current actives
in
- debug "Demodulating goals with actives...";
+ debug (lazy "Demodulating goals with actives...");
(* keep goals demodulated w.r.t. actives and check if solved *)
let bag, g_actives =
List.fold_left
| Some (bag,c1) -> bag,if c==c1 then c::acc else c::c1::acc)
(bag,[]) g_actives
in
- let ctable = IDX.index_unit_clause IDX.DT.empty current in
+ let ctable = IDX.index_clause IDX.DT.empty current in
let bag, maxvar, new_goals =
List.fold_left
(fun (bag,m,acc) g ->
add_passive_goals g_passives new_goals
;;
- let rec given_clause ~noinfer
+ let rec given_clause ~useage ~noinfer
bag maxvar iterno weight_picks max_steps timeout
actives passives g_actives g_passives
=
if noinfer then
begin
debug
- ("Last chance: all is indexed " ^ string_of_float
- (Unix.gettimeofday()));
+ (lazy("Last chance: all is indexed " ^ string_of_float
+ (Unix.gettimeofday())));
let maxgoals = 100 in
ignore(List.fold_left
(fun (acc,i) x ->
end
else if false then (* activates last chance strategy *)
begin
- debug("Last chance: "^string_of_float (Unix.gettimeofday()));
- given_clause ~noinfer:true bag maxvar iterno weight_picks max_steps
+ debug (lazy("Last chance: "^string_of_float (Unix.gettimeofday())));
+ given_clause ~useage ~noinfer:true bag maxvar iterno weight_picks max_steps
(Some (Unix.gettimeofday () +. 20.))
actives passives g_actives g_passives;
raise (Stop (Timeout (maxvar,bag)));
end
else raise (Stop (Timeout (maxvar,bag)));
- let use_age = weight_picks = (iterno / 10 + 1) in
+ let use_age = useage && (weight_picks = (iterno / 6 + 1)) in
let weight_picks = if use_age then 0 else weight_picks+1
in
else
let bag = Terms.replace_in_bag (current,false,iterno) bag in
if backward then
- let _ = debug ("Selected goal : " ^ Pp.pp_unit_clause current) in
+ let _ = debug (lazy("Selected goal : " ^ Pp.pp_clause current)) in
match
if noinfer then
if weight > monster then None else Some (bag,current)
backward_infer_step bag maxvar actives passives
g_actives g_passives g_current iterno
else
- let _ = debug ("Selected fact : " ^ Pp.pp_unit_clause current) in
+ let _ = debug (lazy("Selected fact : " ^ Pp.pp_clause current)) in
(*let is_orphan = Sup.orphan_murder bag (fst actives) current in*)
match
if noinfer then
if weight > monster then bag,None
else bag, Some (current,actives)
else if Sup.orphan_murder bag (fst actives) current then
- let _ = debug "Orphan murdered" in
+ let _ = debug (lazy "Orphan murdered") in
let bag = Terms.replace_in_bag (current,true,iterno) bag in
bag, None
else Sup.keep_simplified current actives bag maxvar
if noinfer then
let actives =
current::fst actives,
- IDX.index_unit_clause (snd actives) current
+ IDX.index_clause (snd actives) current
in
bag,maxvar,actives,passives,g_actives,g_passives
else
(*prerr_endline "Active table :";
(List.iter (fun x -> prerr_endline (Pp.pp_unit_clause x))
(fst actives)); *)
-
let bag,maxvar,actives,passives,g_actives,g_passives =
aux_select bag passives g_passives
in
debug
- (Printf.sprintf "Number of active goals : %d"
- (List.length g_actives));
+ (lazy(Printf.sprintf "Number of active goals : %d"
+ (List.length g_actives)));
debug
- (Printf.sprintf "Number of passive goals : %d"
- (passive_set_cardinal g_passives));
+ (lazy(Printf.sprintf "Number of passive goals : %d"
+ (passive_set_cardinal g_passives)));
debug
- (Printf.sprintf "Number of actives : %d" (List.length (fst actives)));
+ (lazy(Printf.sprintf "Number of actives : %d" (List.length (fst actives))));
debug
- (Printf.sprintf "Number of passives : %d"
- (passive_set_cardinal passives));
- given_clause ~noinfer
+ (lazy(Printf.sprintf "Number of passives : %d"
+ (passive_set_cardinal passives)));
+ given_clause ~useage ~noinfer
bag maxvar iterno weight_picks max_steps timeout
actives passives g_actives g_passives
;;
- let paramod ~max_steps ?timeout (bag,maxvar) ~g_passives ~passives =
+ let paramod ~useage ~max_steps ~print_problem ?timeout goal hypotheses =
let initial_timestamp = Unix.gettimeofday () in
+ let bag = Terms.empty_bag in
+ let maxvar = 0 in
+ let build_clause (bag,maxvar,l) (t,(nlit,plit)) =
+ let c,maxvar = Clauses.mk_clause maxvar nlit plit t in
+ let bag,c = Terms.add_to_bag c bag in
+ (bag,maxvar,c::l)
+ in
+ let bag,maxvar,hypotheses = List.fold_left build_clause (bag,maxvar,[]) hypotheses in
+ let bag,maxvar,goals = build_clause (bag,maxvar,[]) goal in
+ let goal = match goals with | [g] -> g | _ -> assert false in
let passives =
- add_passive_clauses ~no_weight:true passive_empty_set passives
+ add_passive_clauses ~no_weight:true passive_empty_set hypotheses
in
let g_passives =
- add_passive_goals ~no_weight:true passive_empty_set g_passives
+ add_passive_goal ~no_weight:true passive_empty_set goal
in
let g_actives = [] in
let actives = [], IDX.DT.empty in
+ if print_problem then begin
+ prerr_endline "Facts:";
+ List.iter (fun x -> prerr_endline (" " ^ Pp.pp_clause x)) hypotheses;
+ prerr_endline "Goal:";
+ prerr_endline (" " ^ Pp.pp_clause goal);
+ end;
try
- given_clause ~noinfer:false
+ given_clause ~useage ~noinfer:false
bag maxvar 0 0 max_steps timeout actives passives g_actives g_passives
with
- | Sup.Success (bag, _, (i,_,_,_)) ->
+ | Sup.Success (bag, _, (i,_,_,_,_)) ->
let l =
let rec traverse ongoal (accg,acce) i =
match Terms.get_from_bag i bag with
- | (id,_,_,Terms.Exact _),_,_ ->
+ | (id,_,_,_,Terms.Exact _),_,_ ->
if ongoal then [i],acce else
if (List.mem i acce) then accg,acce else accg,acce@[i]
- | (_,_,_,Terms.Step (_,i1,i2,_,_,_)),_,_ ->
+ | (_,_,_,_,Terms.Step (_,i1,i2,_,_,_)),_,_ ->
if (not ongoal) && (List.mem i acce) then accg,acce
else
let accg,acce =
in
let max_w = List.fold_left (fun acc i ->
let (cl,_,_) = Terms.get_from_bag i bag in
- max acc (Order.compute_unit_clause_weight cl)) 0 l in
+ max acc (Order.compute_clause_weight cl)) 0 l in
prerr_endline "Statistics :";
prerr_endline ("Max weight : " ^ (string_of_int max_w));
(* List.iter (fun id -> let ((_,lit,_,proof as cl),d,it) =
projects / helm.git / blobdiff