2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
12 (* $Id: orderings.ml 9869 2009-06-11 22:52:38Z denes $ *)
14 NCicBlob.set_default_eqP()
16 NCicProof.set_default_sig()
20 let print s = prerr_endline (Lazy.force s);;
23 module B(C : NCicBlob.NCicContext): Orderings.Blob
24 with type t = NCic.term and type input = NCic.term
25 = Orderings.LPO(NCicBlob.NCicBlob(C))
27 module NCicParamod(C : NCicBlob.NCicContext) = Paramod.Paramod(B(C))
29 let readback status ?(demod=false) metasenv subst context (bag,i,fo_subst,l) =
32 print_endline (Pp.pp_unit_clause ~margin:max_int
33 (fst(Terms.M.find x bag)))) l;
35 (* let stamp = Unix.gettimeofday () in *)
36 let proofterm,prooftype = NCicProof.mk_proof status ~demod bag i fo_subst l in
37 (* debug (lazy (Printf.sprintf "Got proof term in %fs"
38 (Unix.gettimeofday() -. stamp))); *)
40 let metasenv, proofterm =
41 let rec aux k metasenv = function
42 | NCic.Meta _ as t -> metasenv, t
44 let metasenv, i, _, _ =
45 NCicMetaSubst.mk_meta metasenv context `IsTerm
47 metasenv, NCic.Meta (i,(k,NCic.Irl (List.length context)))
48 | t -> NCicUntrusted.map_term_fold_a
49 (fun _ k -> k+1) k aux metasenv t
51 aux 0 metasenv proofterm
53 debug (lazy (status#ppterm ~metasenv ~subst ~context proofterm));
55 let stamp = Unix.gettimeofday () in
56 let metasenv, subst, proofterm, _prooftype =
58 (status#set_coerc_db NCicCoercion.empty_db)
59 metasenv subst context proofterm None
61 print (lazy (Printf.sprintf "Refined in %fs"
62 (Unix.gettimeofday() -. stamp)));
64 proofterm, prooftype, metasenv, subst
66 let nparamod status metasenv subst context t table =
69 let metasenv = metasenv
74 let module B = B(C) in
75 let module P = NCicParamod(C) in
76 let module Pp = Pp.Pp(B) in
77 let bag, maxvar = Terms.empty_bag, 0 in
78 let (bag,maxvar), goals =
79 HExtlib.list_mapi_acc (fun x _ a -> P.mk_goal a x) (bag,maxvar) [t]
81 let (bag,maxvar), passives =
82 HExtlib.list_mapi_acc (fun x _ a -> P.mk_passive a x) (bag,maxvar) table
85 P.paramod ~useage:true ~max_steps:max_int ~timeout:(Unix.gettimeofday () +. 300.0)
86 ~g_passives:goals ~passives (bag,maxvar)
88 | P.Error _ | P.GaveUp | P.Timeout _ -> []
89 | P.Unsatisfiable solutions ->
90 List.map (readback status metasenv subst context) solutions
100 module CB = NCicBlob.NCicBlob(EmptyC)
101 module P = NCicParamod(EmptyC)
104 let empty_state = P.empty_state
106 exception NotEmbeddable
108 let not_embeddable status subst context ty =
109 let rec aux = function
114 | NCic.Appl l -> List.iter aux l
116 (* cannot embed a blob term containing metas *)
117 if (NCicUntrusted.metas_of_term status subst context t = [])
119 else raise NotEmbeddable
121 try aux ty; noprint (lazy ("Embeddable")); false
122 with NotEmbeddable -> debug (lazy ("Not embeddable")); true
125 let tooflex (_,l,_,_) =
127 | Terms.Equation (l,r,_,o) ->
129 | (Terms.Var _ | Terms.Node (Terms.Var _::_)), _, (Terms.Incomparable | Terms.Invertible) -> true
130 | _, (Terms.Var _ | Terms.Node (Terms.Var _::_)),(Terms.Incomparable | Terms.Invertible) -> true
135 let forward_infer_step0 status metasenv subst context s t ty =
136 let bag = P.bag_of_state s in
139 NCicMetaSubst.saturate status ~delta:0 metasenv subst context ty 0 in
140 not_embeddable status subst context sty in
141 if not_embed then (debug (lazy "theorem not embeddable"); s,None)
143 let bag,clause = P.mk_passive bag (t,ty) in
144 if Terms.is_eq_clause clause then
145 if tooflex clause then (debug (lazy "pruning tooflex"); s,None)
147 P.forward_infer_step (P.replace_bag s bag) clause 0, Some clause
148 else (debug (lazy "not eq"); s,None)
151 let forward_infer_step status metasenv subst context s t ty =
152 fst (forward_infer_step0 status metasenv subst context s t ty)
155 let index_obj status s uri =
156 let obj = NCicEnvironment.get_checked_obj status uri in
157 debug (lazy ("indexing : " ^ (NUri.string_of_uri uri)));
158 debug (lazy ("no : " ^ (string_of_int (fst (Obj.magic uri)))));
160 | (_,_,[],[],NCic.Constant(_,_,None,ty,_)) ->
161 let nref = NReference.reference_of_spec uri NReference.Decl in
162 forward_infer_step0 status [] [] [] s (NCic.Const nref) ty
163 | (_,d,[],[],NCic.Constant(_,_,Some(_),ty,_)) ->
164 let nref = NReference.reference_of_spec uri (NReference.Def d) in
165 forward_infer_step0 status [] [] [] s (NCic.Const nref) ty
169 let demod status metasenv subst context s goal =
170 if not_embeddable status subst context (snd goal) then [] else
171 (* let stamp = Unix.gettimeofday () in *)
172 match P.demod s goal with
173 | P.Error _ | P.GaveUp | P.Timeout _ -> []
174 | P.Unsatisfiable solutions ->
175 (* print (lazy (Printf.sprintf "Got solutions in %fs"
176 (Unix.gettimeofday() -. stamp))); *)
177 List.map (readback ~demod:true status metasenv subst context) solutions
180 let paramod status metasenv subst context s goal =
181 if not_embeddable status subst context (snd goal) then [] else
182 (* let stamp = Unix.gettimeofday () in *)
183 match P.nparamod ~useage:true ~max_steps:max_int
184 ~timeout:(Unix.gettimeofday () +. 300.0) s goal with
185 | P.Error _ | P.GaveUp | P.Timeout _ -> []
186 | P.Unsatisfiable solutions ->
187 (* print (lazy (Printf.sprintf "Got solutions in %fs"
188 (Unix.gettimeofday() -. stamp))); *)
189 List.map (readback status metasenv subst context) solutions
192 let fast_eq_check status metasenv subst context s goal =
193 if not_embeddable status subst context (snd goal) then [] else
194 (* let stamp = Unix.gettimeofday () in *)
195 match P.fast_eq_check s goal with
196 | P.Error _ | P.GaveUp | P.Timeout _ -> []
197 | P.Unsatisfiable solutions ->
198 (* print (lazy (Printf.sprintf "Got solutions in %fs"
199 (Unix.gettimeofday() -. stamp))); *)
200 List.map (readback status metasenv subst context) solutions
203 let is_equation status metasenv subst context ty =
205 NCicMetaSubst.saturate status ~delta:0 metasenv subst context
208 | NCic.Appl (eq ::tl) when eq = CB.eqP -> true
213 let demodulate status metasenv subst context s goal =
214 (* let stamp = Unix.gettimeofday () in *)
215 match P.fast_eq_check s goal with
216 | P.Error _ | P.GaveUp | P.Timeout _ -> []
217 | P.Unsatisfiable solutions ->
218 (* print (lazy (Printf.sprintf "Got solutions in %fs"
219 (Unix.gettimeofday() -. stamp))); *)
220 List.map (readback status metasenv subst context) solutions