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34e49164 C |
1 | (* ********************************************************************** |
2 | * | |
3 | * Wrapping for FUNCTORS and MODULES | |
4 | * | |
5 | * | |
6 | * $Id: wrapper_ctl.ml,v 1.67 2007/11/20 12:57:25 julia Exp $ | |
7 | * | |
8 | * **********************************************************************) | |
9 | ||
10 | type info = int | |
11 | ||
12 | type ('pred, 'mvar) wrapped_ctl = | |
13 | ('pred * 'mvar Ast_ctl.modif, 'mvar, info) Ast_ctl.generic_ctl | |
14 | ||
15 | type ('value, 'pred) wrapped_binding = | |
16 | | ClassicVal of 'value | |
17 | | PredVal of 'pred Ast_ctl.modif | |
18 | ||
19 | type ('pred,'state,'mvar,'value) labelfunc = | |
20 | 'pred -> | |
21 | ('state * ('pred * ('mvar, 'value) Ast_ctl.generic_substitution)) list | |
22 | ||
23 | (* pad: what is 'wit ? *) | |
24 | type ('pred,'state,'mvar,'value,'wit) wrapped_labelfunc = | |
25 | ('pred * 'mvar Ast_ctl.modif) -> | |
26 | ('state * | |
27 | ('mvar,('value,'pred) wrapped_binding) Ast_ctl.generic_substitution * | |
28 | 'wit | |
29 | ) list | |
30 | ||
31 | (* ********************************************************************** *) | |
32 | (* Module type: CTL_ENGINE_BIS (wrapper for CTL_ENGINE) *) | |
33 | (* ********************************************************************** *) | |
34 | ||
35 | (* This module must convert the labelling function passed as parameter, by | |
36 | using convert_label. Then create a SUBST2 module handling the | |
37 | wrapped_binding. Then it can instantiates the generic CTL_ENGINE | |
38 | module. Call sat. And then process the witness tree to remove all that | |
39 | is not revelevant for the transformation phase. | |
40 | *) | |
41 | ||
42 | module CTL_ENGINE_BIS = | |
43 | functor (SUB : Ctl_engine.SUBST) -> | |
44 | functor (G : Ctl_engine.GRAPH) -> | |
45 | functor(P : Ctl_engine.PREDICATE) -> | |
46 | struct | |
47 | ||
48 | exception TODO_CTL of string (* implementation still not quite done so... *) | |
49 | exception NEVER_CTL of string (* Some things should never happen *) | |
50 | ||
51 | module A = Ast_ctl | |
52 | ||
53 | type predicate = P.t | |
54 | module WRAPPER_ENV = | |
55 | struct | |
56 | type mvar = SUB.mvar | |
57 | type value = (SUB.value,predicate) wrapped_binding | |
58 | let eq_mvar = SUB.eq_mvar | |
59 | let eq_val wv1 wv2 = | |
60 | match (wv1,wv2) with | |
61 | | (ClassicVal(v1),ClassicVal(v2)) -> SUB.eq_val v1 v2 | |
62 | | (PredVal(v1),PredVal(v2)) -> v1 = v2 (* FIX ME: ok? *) | |
63 | | _ -> false | |
64 | let merge_val wv1 wv2 = | |
65 | match (wv1,wv2) with | |
66 | | (ClassicVal(v1),ClassicVal(v2)) -> ClassicVal(SUB.merge_val v1 v2) | |
67 | | _ -> wv1 (* FIX ME: ok? *) | |
68 | ||
69 | ||
70 | let print_mvar x = SUB.print_mvar x | |
71 | let print_value x = | |
72 | match x with | |
73 | ClassicVal v -> SUB.print_value v | |
74 | | PredVal(A.Modif v) -> P.print_predicate v | |
75 | | PredVal(A.UnModif v) -> P.print_predicate v | |
76 | | PredVal(A.Control) -> Format.print_string "no value" | |
77 | end | |
78 | ||
79 | module WRAPPER_PRED = | |
80 | struct | |
81 | type t = P.t * SUB.mvar Ast_ctl.modif | |
82 | let print_predicate (pred, modif) = | |
83 | begin | |
84 | P.print_predicate pred; | |
85 | (match modif with | |
86 | Ast_ctl.Modif x | Ast_ctl.UnModif x -> | |
87 | Format.print_string " with <modifTODO>" | |
88 | | Ast_ctl.Control -> ()) | |
89 | end | |
90 | end | |
91 | ||
92 | (* Instantiate a wrapped version of CTL_ENGINE *) | |
93 | module WRAPPER_ENGINE = | |
94 | Ctl_engine.CTL_ENGINE (WRAPPER_ENV) (G) (WRAPPER_PRED) | |
95 | ||
96 | (* Wrap a label function *) | |
97 | let (wrap_label: ('pred,'state,'mvar,'value) labelfunc -> | |
98 | ('pred,'state,'mvar,'value,'wit) wrapped_labelfunc) = | |
99 | fun oldlabelfunc -> | |
100 | fun (p, predvar) -> | |
101 | ||
102 | let penv p' = | |
103 | match predvar with | |
104 | | A.Modif(x) -> [A.Subst(x,PredVal(A.Modif(p')))] | |
105 | | A.UnModif(x) -> [A.Subst(x,PredVal(A.UnModif(p')))] | |
106 | | A.Control -> [] in | |
107 | ||
108 | let conv_sub sub = | |
109 | match sub with | |
110 | | A.Subst(x,v) -> A.Subst(x,ClassicVal(v)) | |
111 | | A.NegSubst(x,v) -> A.NegSubst(x,ClassicVal(v)) in | |
112 | ||
113 | let conv_trip (s,(p',env)) = | |
114 | (s,penv p' @ (List.map conv_sub env),[](*pad: ?*)) | |
115 | in | |
116 | List.map conv_trip (oldlabelfunc p) | |
117 | ||
118 | (* ---------------------------------------------------------------- *) | |
119 | ||
120 | (* FIX ME: what about negative witnesses and negative substitutions *) | |
121 | let unwrap_wits modifonly wits = | |
122 | let mkth th = | |
123 | Common.map_filter | |
124 | (function A.Subst(x,ClassicVal(v)) -> Some (x,v) | _ -> None) | |
125 | th in | |
126 | let rec loop neg acc = function | |
127 | A.Wit(st,[A.Subst(x,PredVal(A.Modif(v)))],anno,wit) -> | |
128 | (match wit with | |
129 | [] -> [(st,acc,v)] | |
130 | | _ -> raise (NEVER_CTL "predvar tree should have no children")) | |
131 | | A.Wit(st,[A.Subst(x,PredVal(A.UnModif(v)))],anno,wit) | |
132 | when not modifonly or !Flag.track_iso_usage -> | |
133 | (match wit with | |
134 | [] -> [(st,acc,v)] | |
135 | | _ -> raise (NEVER_CTL "predvar tree should have no children")) | |
136 | | A.Wit(st,th,anno,wit) -> | |
137 | List.concat (List.map (loop neg ((mkth th) @ acc)) wit) | |
138 | | A.NegWit(_) -> [] (* why not failure? *) in | |
139 | List.concat (List.map (function wit -> loop false [] wit) wits) | |
140 | ;; | |
141 | ||
142 | (* | |
143 | (* a match can return many trees, but within each tree, there has to be | |
144 | at most one value for each variable that is in the used_after list *) | |
145 | let collect_used_after used_after envs = | |
146 | let print_var var = SUB.print_mvar var; Format.print_flush() in | |
147 | List.concat | |
148 | (List.map | |
149 | (function used_after_var -> | |
150 | let vl = | |
151 | List.fold_left | |
152 | (function rest -> | |
153 | function env -> | |
154 | try | |
155 | let vl = List.assoc used_after_var env in | |
156 | match rest with | |
157 | None -> Some vl | |
158 | | Some old_vl when SUB.eq_val vl old_vl -> rest | |
159 | | Some old_vl -> print_var used_after_var; | |
160 | Format.print_newline(); | |
161 | SUB.print_value old_vl; | |
162 | Format.print_newline(); | |
163 | SUB.print_value vl; | |
164 | Format.print_newline(); | |
165 | failwith "incompatible values" | |
166 | with Not_found -> rest) | |
167 | None envs in | |
168 | match vl with | |
169 | None -> [] | |
170 | | Some vl -> [(used_after_var, vl)]) | |
171 | used_after) | |
172 | *) | |
173 | ||
174 | (* a match can return many trees, but within each tree, there has to be | |
175 | at most one value for each variable that is in the used_after list *) | |
176 | (* actually, this should always be the case, because these variables | |
177 | should be quantified at the top level. so the more complicated | |
178 | definition above should not be needed. *) | |
179 | let collect_used_after used_after envs = | |
180 | List.concat | |
181 | (List.map | |
182 | (function used_after_var -> | |
183 | let vl = | |
184 | List.fold_left | |
185 | (function rest -> | |
186 | function env -> | |
187 | try | |
188 | let vl = List.assoc used_after_var env in | |
189 | if List.exists (function x -> SUB.eq_val x vl) rest | |
190 | then rest | |
191 | else vl::rest | |
192 | with Not_found -> rest) | |
193 | [] envs in | |
194 | List.map (function x -> (used_after_var, x)) vl) | |
195 | used_after) | |
196 | ||
197 | (* ----------------------------------------------------- *) | |
198 | ||
199 | (* The wrapper for sat from the CTL_ENGINE *) | |
200 | let satbis_noclean (grp,lab,states) (phi,reqopt) : | |
201 | ('pred,'anno) WRAPPER_ENGINE.triples = | |
202 | WRAPPER_ENGINE.sat (grp,wrap_label lab,states) phi reqopt | |
203 | ||
204 | (* Returns the "cleaned up" result from satbis_noclean *) | |
205 | let (satbis : | |
206 | G.cfg * | |
207 | (predicate,G.node,SUB.mvar,SUB.value) labelfunc * | |
208 | G.node list -> | |
209 | ((predicate,SUB.mvar) wrapped_ctl * | |
210 | (WRAPPER_PRED.t list list)) -> | |
211 | (WRAPPER_ENV.mvar list * (SUB.mvar * SUB.value) list) -> | |
212 | ((WRAPPER_PRED.t, 'a) WRAPPER_ENGINE.triples * | |
213 | ((G.node * (SUB.mvar * SUB.value) list * predicate) | |
214 | list list * | |
215 | bool * | |
216 | (WRAPPER_ENV.mvar * SUB.value) list list))) = | |
217 | fun m phi (used_after, binding) -> | |
218 | let noclean = satbis_noclean m phi in | |
219 | let witness_trees = List.map (fun (_,_,w) -> w) noclean in | |
220 | let res = List.map (unwrap_wits true) witness_trees in | |
221 | let new_bindings = | |
222 | List.map | |
223 | (function bindings_per_witness_tree -> | |
224 | (List.map (function (_,env,_) -> env) bindings_per_witness_tree)) | |
225 | (List.map (unwrap_wits false) witness_trees) in | |
226 | (noclean, | |
227 | (res,not(noclean = []), | |
228 | (* throw in the old binding. By construction it doesn't conflict | |
229 | with any of the new things, and it is useful if there are no new | |
230 | things. *) | |
231 | (List.map (collect_used_after used_after) new_bindings))) | |
232 | ||
233 | let print_bench _ = WRAPPER_ENGINE.print_bench() | |
234 | ||
235 | (* END OF MODULE: CTL_ENGINE_BIS *) | |
236 | end |