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: nCic.ml 9058 2008-10-13 17:42:30Z tassi $ *)
16 open DisambiguateTypes
18 module Ast = NotationPt
19 module NRef = NReference
21 let debug_print s = prerr_endline (Lazy.force s);;
22 let debug_print _ = ();;
24 let cic_name_of_name = function
25 | Ast.Ident (n, None) -> n
29 let rec mk_rels howmany from =
32 | _ -> (NCic.Rel (howmany + from)) :: (mk_rels (howmany-1) from)
35 let refine_term (status: #NCicCoercion.status) metasenv subst context uri ~use_coercions term expty _
39 debug_print (lazy (sprintf "TEST_INTERPRETATION: %s"
40 (status#ppterm ~metasenv ~subst ~context term)));
43 try NCicUntrusted.NCicHash.find localization_tbl t
45 prerr_endline ("NOT LOCALISED" ^ status#ppterm ~metasenv ~subst ~context t);
46 (*assert false*) HExtlib.dummy_floc
48 let metasenv, subst, term, _ =
51 (if use_coercions then status#coerc_db else NCicCoercion.empty_db))
52 metasenv subst context term expty ~localise
54 Disambiguate.Ok (term, metasenv, subst, ())
56 | NCicRefiner.Uncertain loc_msg ->
57 debug_print (lazy ("UNCERTAIN: [" ^ snd (Lazy.force loc_msg) ^ "] " ^
58 status#ppterm ~metasenv ~subst ~context term)) ;
59 Disambiguate.Uncertain loc_msg
60 | NCicRefiner.RefineFailure loc_msg ->
61 debug_print (lazy (sprintf "PRUNED:\nterm%s\nmessage:%s"
62 (status#ppterm ~metasenv ~subst ~context term) (snd(Lazy.force loc_msg))));
63 Disambiguate.Ko loc_msg
66 let refine_obj status metasenv subst _context _uri ~use_coercions obj _ _ugraph
69 (*prerr_endline ((sprintf "TEST_INTERPRETATION: %s" (status#ppobj obj)));*)
73 try NCicUntrusted.NCicHash.find localization_tbl t
75 (*assert false*)HExtlib.dummy_floc
79 NCicRefiner.typeof_obj
81 (if use_coercions then status#coerc_db
82 else NCicCoercion.empty_db))
85 Disambiguate.Ok (obj, [], [], ())
87 | NCicRefiner.Uncertain loc_msg ->
88 debug_print (lazy ("UNCERTAIN: [" ^ snd (Lazy.force loc_msg) ^ "] " ^
90 Disambiguate.Uncertain loc_msg
91 | NCicRefiner.RefineFailure loc_msg ->
92 debug_print (lazy (sprintf "PRUNED:\nobj: %s\nmessage: %s"
93 (status#ppobj obj) (snd(Lazy.force loc_msg))));
94 Disambiguate.Ko loc_msg
98 (* TODO move it to Cic *)
99 let find_in_context name context =
100 let rec aux acc = function
101 | [] -> raise Not_found
102 | hd :: _ when hd = name -> acc
103 | _ :: tl -> aux (acc + 1) tl
107 let interpretate_term_and_interpretate_term_option (status: #NCic.status)
108 ?(create_dummy_ids=false) ~obj_context ~mk_choice ~env ~uri ~is_path
111 (* create_dummy_ids shouldbe used only for interpretating patterns *)
114 let rec aux ~localize loc context = function
115 | NotationPt.AttributedTerm (`Loc loc, term) ->
116 let res = aux ~localize loc context term in
118 NCicUntrusted.NCicHash.add localization_tbl res loc;
120 | NotationPt.AttributedTerm (_, term) -> aux ~localize loc context term
122 (NotationPt.AttributedTerm (att, inner)::args)->
123 aux ~localize loc context
124 (NotationPt.AttributedTerm (att,NotationPt.Appl (inner :: args)))
125 | NotationPt.Appl (NotationPt.Appl inner :: args) ->
126 aux ~localize loc context (NotationPt.Appl (inner @ args))
127 | NotationPt.Appl (NotationPt.Symbol (symb, i) :: args) ->
128 let cic_args = List.map (aux ~localize loc context) args in
129 Disambiguate.resolve ~mk_choice ~env (Symbol (symb, i)) (`Args cic_args)
130 | NotationPt.Appl terms ->
131 NCic.Appl (List.map (aux ~localize loc context) terms)
132 | NotationPt.Binder (binder_kind, (var, typ), body) ->
133 let cic_type = aux_option ~localize loc context `Type typ in
134 let cic_name = cic_name_of_name var in
135 let cic_body = aux ~localize loc (cic_name :: context) body in
136 (match binder_kind with
137 | `Lambda -> NCic.Lambda (cic_name, cic_type, cic_body)
139 | `Forall -> NCic.Prod (cic_name, cic_type, cic_body)
141 Disambiguate.resolve ~env ~mk_choice (Symbol ("exists", 0))
142 (`Args [ cic_type; NCic.Lambda (cic_name, cic_type, cic_body) ]))
143 | NotationPt.Case (term, indty_ident, outtype, branches) ->
144 let cic_term = aux ~localize loc context term in
145 let cic_outtype = aux_option ~localize loc context `Term outtype in
146 let do_branch ((_, _, args), term) =
147 let rec do_branch' context = function
148 | [] -> aux ~localize loc context term
149 | (name, typ) :: tl ->
150 let cic_name = cic_name_of_name name in
151 let cic_body = do_branch' (cic_name :: context) tl in
154 | None -> NCic.Implicit `Type
155 | Some typ -> aux ~localize loc context typ
157 NCic.Lambda (cic_name, typ, cic_body)
159 do_branch' context args
161 if create_dummy_ids then
165 Ast.Wildcard,term -> ("wildcard",None,[]), term
167 raise (DisambiguateTypes.Invalid_choice
168 (lazy (loc, "Syntax error: the left hand side of a "^
169 "branch pattern must be \"_\"")))
172 NReference.reference_of_string "cic:/fake_indty.ind(0,0,0)"
174 NCic.Match (indtype_ref, cic_outtype, cic_term,
175 (List.map do_branch branches))
178 match indty_ident with
179 | Some (indty_ident, _) ->
180 (match Disambiguate.resolve ~env ~mk_choice
181 (Id indty_ident) (`Args []) with
182 | NCic.Const (NReference.Ref (_,NReference.Ind _) as r) -> r
184 raise (Disambiguate.Try_again
185 (lazy "The type of the term to be matched is still unknown"))
187 raise (DisambiguateTypes.Invalid_choice
188 (lazy (loc,"The type of the term to be matched "^
189 "is not (co)inductive: " ^ status#ppterm
190 ~metasenv:[] ~subst:[] ~context:[] t))))
192 let rec fst_constructor =
194 (Ast.Pattern (head, _, _), _) :: _ -> head
195 | (Ast.Wildcard, _) :: tl -> fst_constructor tl
196 | [] -> raise (Invalid_choice (lazy (loc,"The type "^
197 "of the term to be matched cannot be determined "^
198 "because it is an inductive type without constructors "^
199 "or because all patterns use wildcards")))
202 DisambiguateTypes.Environment.iter
205 (DisambiguateTypes.string_of_domain_item k ^ " => " ^
206 description_of_alias v)) env;
208 (match Disambiguate.resolve ~env ~mk_choice
209 (Id (fst_constructor branches)) (`Args []) with
210 | NCic.Const (NReference.Ref (_,NReference.Con _) as r) ->
211 let b,_,_,_,_= NCicEnvironment.get_checked_indtys status r in
212 NReference.mk_indty b r
214 raise (Disambiguate.Try_again
215 (lazy "The type of the term to be matched is still unknown"))
217 raise (DisambiguateTypes.Invalid_choice
219 "The type of the term to be matched is not (co)inductive: "
220 ^ status#ppterm ~metasenv:[] ~subst:[] ~context:[] t))))
222 let _,leftsno,itl,_,indtyp_no =
223 NCicEnvironment.get_checked_indtys status indtype_ref in
226 List.nth itl indtyp_no
227 with _ -> assert false in
228 let rec count_prod t =
229 match NCicReduction.whd status ~subst:[] [] t with
230 NCic.Prod (_, _, t) -> 1 + (count_prod t)
233 let rec sort branches cl =
236 let rec analyze unused unrecognized useless =
239 if unrecognized != [] then
240 raise (DisambiguateTypes.Invalid_choice
242 (loc,"Unrecognized constructors: " ^
243 String.concat " " unrecognized)))
244 else if useless > 0 then
245 raise (DisambiguateTypes.Invalid_choice
247 (loc,"The last " ^ string_of_int useless ^
248 "case" ^ if useless > 1 then "s are" else " is" ^
252 | (Ast.Wildcard,_)::tl when not unused ->
253 analyze true unrecognized useless tl
254 | (Ast.Pattern (head,_,_),_)::tl when not unused ->
255 analyze unused (head::unrecognized) useless tl
256 | _::tl -> analyze unused unrecognized (useless + 1) tl
258 analyze false [] 0 branches
259 | (_,name,ty)::cltl ->
260 let rec find_and_remove =
264 (DisambiguateTypes.Invalid_choice
265 (lazy (loc, "Missing case: " ^ name)))
266 | ((Ast.Wildcard, _) as branch :: _) as branches ->
268 | (Ast.Pattern (name',_,_),_) as branch :: tl
272 let found,rest = find_and_remove tl in
275 let branch,tl = find_and_remove branches in
277 Ast.Pattern (name,y,args),term ->
278 if List.length args = count_prod ty - leftsno then
279 ((name,y,args),term)::sort tl cltl
282 (DisambiguateTypes.Invalid_choice
283 (lazy (loc,"Wrong number of arguments for " ^ name)))
284 | Ast.Wildcard,term ->
290 (`Lambda, (NotationPt.Ident ("_", None), None),
293 (("wildcard",None,[]),
294 mk_lambdas (count_prod ty - leftsno)) :: sort tl cltl
296 let branches = sort branches cl in
297 NCic.Match (indtype_ref, cic_outtype, cic_term,
298 (List.map do_branch branches))
299 | NotationPt.Cast (t1, t2) ->
300 let cic_t1 = aux ~localize loc context t1 in
301 let cic_t2 = aux ~localize loc context t2 in
302 NCic.LetIn ("_",cic_t2,cic_t1, NCic.Rel 1)
303 | NotationPt.LetIn ((name, typ), def, body) ->
304 let cic_def = aux ~localize loc context def in
305 let cic_name = cic_name_of_name name in
308 | None -> NCic.Implicit `Type
309 | Some t -> aux ~localize loc context t
311 let cic_body = aux ~localize loc (cic_name :: context) body in
312 NCic.LetIn (cic_name, cic_typ, cic_def, cic_body)
313 | NotationPt.LetRec (_kind, _defs, _body) -> NCic.Implicit `Term
316 | NotationPt.NRef _ when is_path -> raise Disambiguate.PathNotWellFormed
317 | NotationPt.Ident (name, subst) ->
318 assert (subst = None);
320 NCic.Rel (find_in_context name context)
322 try NCic.Const (List.assoc name obj_context)
324 Disambiguate.resolve ~env ~mk_choice (Id name) (`Args []))
325 | NotationPt.Uri (uri, subst) ->
326 assert (subst = None);
328 NCic.Const (NReference.reference_of_string uri)
329 with NRef.IllFormedReference _ ->
330 NotationPt.fail loc "Ill formed reference")
331 | NotationPt.NRef nref -> NCic.Const nref
332 | NotationPt.NCic t -> t
333 | NotationPt.Implicit `Vector -> NCic.Implicit `Vector
334 | NotationPt.Implicit `JustOne -> NCic.Implicit `Term
335 | NotationPt.Implicit (`Tagged s) -> NCic.Implicit (`Tagged s)
336 | NotationPt.UserInput -> NCic.Implicit `Hole
337 | NotationPt.Num (num, i) ->
338 Disambiguate.resolve ~env ~mk_choice (Num i) (`Num_arg num)
339 | NotationPt.Meta (index, subst) ->
342 (function None -> assert false| Some t -> aux ~localize loc context t)
345 NCic.Meta (index, (0, NCic.Ctx cic_subst))
346 | NotationPt.Sort `Prop -> NCic.Sort NCic.Prop
347 | NotationPt.Sort `Set -> NCic.Sort (NCic.Type
348 [`Type,NUri.uri_of_string "cic:/matita/pts/Type.univ"])
349 | NotationPt.Sort (`NType s) -> NCic.Sort (NCic.Type
350 [`Type,NUri.uri_of_string ("cic:/matita/pts/Type" ^ s ^ ".univ")])
351 | NotationPt.Sort (`NCProp s) -> NCic.Sort (NCic.Type
352 [`CProp,NUri.uri_of_string ("cic:/matita/pts/Type" ^ s ^ ".univ")])
353 | NotationPt.Symbol (symbol, instance) ->
354 Disambiguate.resolve ~env ~mk_choice
355 (Symbol (symbol, instance)) (`Args [])
356 | NotationPt.Variable _
358 | NotationPt.Layout _
359 | NotationPt.Literal _ -> assert false (* god bless Bologna *)
360 and aux_option ~localize loc context annotation = function
361 | None -> NCic.Implicit annotation
362 | Some (NotationPt.AttributedTerm (`Loc loc, term)) ->
363 let res = aux_option ~localize loc context annotation (Some term) in
365 NCicUntrusted.NCicHash.add localization_tbl res loc;
367 | Some (NotationPt.AttributedTerm (_, term)) ->
368 aux_option ~localize loc context annotation (Some term)
369 | Some NotationPt.Implicit `JustOne -> NCic.Implicit annotation
370 | Some NotationPt.Implicit `Vector -> NCic.Implicit `Vector
371 | Some term -> aux ~localize loc context term
373 (fun ~context -> aux ~localize:true HExtlib.dummy_floc context),
374 (fun ~context -> aux_option ~localize:true HExtlib.dummy_floc context)
377 let interpretate_term status ?(create_dummy_ids=false) ~context ~env ~uri
378 ~is_path ast ~obj_context ~localization_tbl ~mk_choice
380 let context = List.map fst context in
382 (interpretate_term_and_interpretate_term_option status
383 ~obj_context ~mk_choice ~create_dummy_ids ~env ~uri ~is_path
388 let interpretate_term_option status ?(create_dummy_ids=false) ~context ~env ~uri
389 ~is_path ~localization_tbl ~mk_choice ~obj_context
391 let context = List.map fst context in
393 (interpretate_term_and_interpretate_term_option status
394 ~obj_context ~mk_choice ~create_dummy_ids ~env ~uri ~is_path
399 let disambiguate_path status path =
400 let localization_tbl = NCicUntrusted.NCicHash.create 23 in
402 (interpretate_term_and_interpretate_term_option status
403 ~obj_context:[] ~mk_choice:(fun _ -> assert false)
404 ~create_dummy_ids:true ~env:DisambiguateTypes.Environment.empty
405 ~uri:None ~is_path:true ~localization_tbl) ~context:[] path
408 let ncic_name_of_ident = function
409 | Ast.Ident (name, None) -> name
413 let interpretate_obj status
414 (* ?(create_dummy_ids=false) *)
415 ~context ~env ~uri ~is_path obj ~localization_tbl ~mk_choice
417 assert (context = []);
418 assert (is_path = false);
419 let interpretate_term ~obj_context =
420 interpretate_term ~mk_choice ~localization_tbl ~obj_context in
421 let interpretate_term_option ~obj_context =
422 interpretate_term_option ~mk_choice ~localization_tbl ~obj_context in
423 let uri = match uri with | None -> assert false | Some u -> u in
425 | NotationPt.Theorem (flavour, name, ty, bo, pragma) ->
427 interpretate_term status
428 ~obj_context:[] ~context:[] ~env ~uri:None ~is_path:false ty
430 let height = (* XXX calculate *) 0 in
432 (match bo,flavour with
434 let attrs = `Provided, flavour, pragma in
435 NCic.Constant ([],name,None,ty',attrs)
436 | Some _,`Axiom -> assert false
438 let attrs = `Provided, flavour, pragma in
439 NCic.Constant ([],name,Some (NCic.Implicit `Term),ty',attrs)
442 | NotationPt.LetRec (kind, defs, _) ->
443 let inductive = kind = `Inductive in
446 (fun (i,acc) (_,(name,_),_,k) ->
448 (ncic_name_of_ident name, NReference.reference_of_spec uri
449 (if inductive then NReference.Fix (i,k,0)
450 else NReference.CoFix i)) :: acc))
455 (fun (params, (name, typ), body, decr_idx) ->
456 let add_binders kind t =
459 NotationPt.Binder (kind, var, t)) params t
462 interpretate_term status
463 ~obj_context ~context ~env ~uri:None ~is_path:false
464 (add_binders `Lambda body)
467 interpretate_term_option status
469 ~context ~env ~uri:None ~is_path:false `Type
470 (HExtlib.map_option (add_binders `Pi) typ)
472 ([],ncic_name_of_ident name, decr_idx, cic_type, cic_body))
475 let attrs = `Provided, flavour, pragma in
476 NCic.Fixpoint (inductive,inductiveFuns,attrs)
479 interpretate_term status
480 ~obj_context:[] ~context:[] ~env ~uri:None ~is_path:false bo
482 let attrs = `Provided, flavour, pragma in
483 NCic.Constant ([],name,Some bo,ty',attrs)))
484 | NotationPt.Inductive (params,tyl) ->
488 (fun (context,res) (name,t) ->
491 None -> NotationPt.Implicit `JustOne
493 let name = cic_name_of_name name in
495 interpretate_term status ~obj_context:[] ~context ~env ~uri:None
498 (name,NCic.Decl t)::context,(name,t)::res
501 context,List.rev res in
503 List.fold_right (fun (name,ty) t -> NCic.Prod (name,ty,t)) params in
504 let leftno = List.length params in
505 let _,inductive,_,_ = try List.hd tyl with Failure _ -> assert false in
509 (fun (i,res) (name,_,_,_) ->
511 NReference.reference_of_spec uri (NReference.Ind (inductive,i,leftno))
513 i+1,(name,nref)::res)
517 (fun (name,_,ty,cl) ->
520 (interpretate_term status ~obj_context:[] ~context ~env ~uri:None
521 ~is_path:false ty) in
527 (interpretate_term status ~obj_context ~context ~env ~uri:None
528 ~is_path:false ty) in
529 let relevance = [] in
532 let relevance = [] in
533 relevance,name,ty',cl'
536 let height = (* XXX calculate *) 0 in
537 let attrs = `Provided, `Regular in
539 NCic.Inductive (inductive,leftno,tyl,attrs)
540 | NotationPt.Record (params,name,ty,fields) ->
544 (fun (context,res) (name,t) ->
547 None -> NotationPt.Implicit `JustOne
549 let name = cic_name_of_name name in
551 interpretate_term status ~obj_context:[] ~context ~env ~uri:None
554 (name,NCic.Decl t)::context,(name,t)::res
557 context,List.rev res in
559 List.fold_right (fun (name,ty) t -> NCic.Prod (name,ty,t)) params in
560 let leftno = List.length params in
563 (interpretate_term status ~obj_context:[] ~context ~env ~uri:None
564 ~is_path:false ty) in
566 NReference.reference_of_spec uri (NReference.Ind (true,0,leftno)) in
567 let obj_context = [name,nref] in
571 (fun (context,res) (name,ty,_coercion,_arity) ->
573 interpretate_term status ~obj_context ~context ~env ~uri:None
575 let context' = (name,NCic.Decl ty)::context in
576 context',(name,ty)::res
577 ) (context,[]) fields) in
579 let mutind = NCic.Const nref in
580 if params = [] then mutind
583 (mutind::mk_rels (List.length params) (List.length fields)) in
585 List.fold_left (fun t (name,ty) -> NCic.Prod (name,ty,t)) concl fields' in
586 let con' = add_params con in
587 let relevance = [] in
588 let tyl = [relevance,name,ty',[relevance,"mk_" ^ name,con']] in
589 let field_names = List.map (fun (x,_,y,z) -> x,y,z) fields in
590 let height = (* XXX calculate *) 0 in
591 let attrs = `Provided, `Record field_names in
593 NCic.Inductive (true,leftno,tyl,attrs)
596 let disambiguate_term (status: #NCicCoercion.status) ~context ~metasenv ~subst
597 ~expty ~mk_implicit ~description_of_alias ~fix_instance ~mk_choice
598 ~aliases ~universe ~lookup_in_library (text,prefix_len,term)
600 let mk_localization_tbl x = NCicUntrusted.NCicHash.create x in
602 MultiPassDisambiguator.disambiguate_thing
603 ~freshen_thing:NotationUtil.freshen_term
604 ~context ~metasenv ~initial_ugraph:() ~aliases
605 ~mk_implicit ~description_of_alias ~fix_instance
606 ~string_context_of_context:(List.map (fun (x,_) -> Some x))
607 ~universe ~uri:None ~pp_thing:(NotationPp.pp_term status)
608 ~passes:(MultiPassDisambiguator.passes ())
609 ~lookup_in_library ~domain_of_thing:Disambiguate.domain_of_term
610 ~interpretate_thing:(interpretate_term status ~obj_context:[] ~mk_choice (?create_dummy_ids:None))
611 ~refine_thing:(refine_term status) (text,prefix_len,term)
612 ~mk_localization_tbl ~expty ~subst
614 List.map (function (a,b,c,d,_) -> a,b,c,d) res, b
617 let disambiguate_obj (status: #NCicCoercion.status)
618 ~mk_implicit ~description_of_alias ~fix_instance ~mk_choice
619 ~aliases ~universe ~lookup_in_library ~uri (text,prefix_len,obj)
621 let mk_localization_tbl x = NCicUntrusted.NCicHash.create x in
623 MultiPassDisambiguator.disambiguate_thing
624 ~freshen_thing:NotationUtil.freshen_obj
625 ~context:[] ~metasenv:[] ~subst:[] ~initial_ugraph:() ~aliases
626 ~mk_implicit ~description_of_alias ~fix_instance
627 ~string_context_of_context:(List.map (fun (x,_) -> Some x))
630 ~pp_thing:(NotationPp.pp_obj (NotationPp.pp_term status))
631 ~passes:(MultiPassDisambiguator.passes ())
632 ~lookup_in_library ~domain_of_thing:Disambiguate.domain_of_obj
633 ~interpretate_thing:(interpretate_obj status ~mk_choice)
634 ~refine_thing:(refine_obj status)
635 (text,prefix_len,obj)
636 ~mk_localization_tbl ~expty:None
638 List.map (function (a,b,c,d,_) -> a,b,c,d) res, b
644 [false, NUri.uri_of_string ("cic:/matita/pts/Type.univ")]
646 [false, NUri.uri_of_string ("cic:/matita/pts/Type"^string_of_int n^".univ")]
650 [false, NUri.uri_of_string ("cic:/matita/pts/CProp.univ")]
652 [false, NUri.uri_of_string ("cic:/matita/pts/CProp"^string_of_int n^".univ")]
654 NCicEnvironment.add_constraint true (mk_type 0) (mk_type 1);
655 NCicEnvironment.add_constraint true (mk_cprop 0) (mk_cprop 1);
656 NCicEnvironment.add_constraint true (mk_cprop 0) (mk_type 1);
657 NCicEnvironment.add_constraint true (mk_type 0) (mk_cprop 1);
658 NCicEnvironment.add_constraint false (mk_cprop 0) (mk_type 0);
659 NCicEnvironment.add_constraint false (mk_type 0) (mk_cprop 0);
661 NCicEnvironment.add_constraint true (mk_type 1) (mk_type 2);
662 NCicEnvironment.add_constraint true (mk_cprop 1) (mk_cprop 2);
663 NCicEnvironment.add_constraint true (mk_cprop 1) (mk_type 2);
664 NCicEnvironment.add_constraint true (mk_type 1) (mk_cprop 2);
665 NCicEnvironment.add_constraint false (mk_cprop 1) (mk_type 1);
666 NCicEnvironment.add_constraint false (mk_type 1) (mk_cprop 1);
668 NCicEnvironment.add_constraint true (mk_type 2) (mk_type 3);
669 NCicEnvironment.add_constraint true (mk_cprop 2) (mk_cprop 3);
670 NCicEnvironment.add_constraint true (mk_cprop 2) (mk_type 3);
671 NCicEnvironment.add_constraint true (mk_type 2) (mk_cprop 3);
672 NCicEnvironment.add_constraint false (mk_cprop 2) (mk_type 2);
673 NCicEnvironment.add_constraint false (mk_type 2) (mk_cprop 2);
675 NCicEnvironment.add_constraint false (mk_cprop 3) (mk_type 3);
676 NCicEnvironment.add_constraint false (mk_type 3) (mk_cprop 3);