make sure chained facts appear in Isar proofs generated by Sledgehammer -- otherwise the proof won't work
1 (* Title: HOL/Tools/Sledgehammer/sledgehammer_isar.ML
2 Author: Jasmin Blanchette, TU Muenchen
4 Adds "sledgehammer" and related commands to Isabelle/Isar's outer syntax.
7 signature SLEDGEHAMMER_ISAR =
9 type params = ATP_Manager.params
11 val atps: string Unsynchronized.ref
12 val timeout: int Unsynchronized.ref
13 val full_types: bool Unsynchronized.ref
14 val default_params : theory -> (string * string) list -> params
15 val setup: theory -> theory
18 structure Sledgehammer_Isar : SLEDGEHAMMER_ISAR =
21 open Sledgehammer_Util
22 open Sledgehammer_Fact_Preprocessor
25 open Sledgehammer_Fact_Minimizer
27 (** Proof method used in Isar proofs **)
29 val neg_clausify_setup =
30 Method.setup @{binding neg_clausify}
31 (Scan.succeed (SIMPLE_METHOD' o neg_clausify_tac))
32 "conversion of goal to negated conjecture clauses"
34 (** Attribute for converting a theorem into clauses **)
36 val parse_clausify_attribute : attribute context_parser =
38 >> (fn i => Thm.rule_attribute (fn context => fn th =>
39 let val thy = Context.theory_of context in
40 Meson.make_meta_clause (nth (cnf_axiom thy th) i)
44 Attrib.setup @{binding clausify} parse_clausify_attribute
45 "conversion of theorem to clauses"
47 (** Sledgehammer commands **)
49 fun add_to_relevance_override ns : relevance_override =
50 {add = ns, del = [], only = false}
51 fun del_from_relevance_override ns : relevance_override =
52 {add = [], del = ns, only = false}
53 fun only_relevance_override ns : relevance_override =
54 {add = ns, del = [], only = true}
55 val no_relevance_override = add_to_relevance_override []
56 fun merge_relevance_override_pairwise (r1 : relevance_override)
57 (r2 : relevance_override) =
58 {add = #add r1 @ #add r2, del = #del r1 @ #del r2,
59 only = #only r1 andalso #only r2}
60 fun merge_relevance_overrides rs =
61 fold merge_relevance_override_pairwise rs (only_relevance_override [])
65 val atps = Unsynchronized.ref ""
66 val timeout = Unsynchronized.ref 60
67 val full_types = Unsynchronized.ref false
70 ProofGeneralPgip.add_preference Preferences.category_proof
71 (Preferences.string_pref atps
73 "Default automatic provers (separated by whitespace)")
76 ProofGeneralPgip.add_preference Preferences.category_proof
77 (Preferences.int_pref timeout
78 "Sledgehammer: Time Limit"
79 "ATPs will be interrupted after this time (in seconds)")
82 ProofGeneralPgip.add_preference Preferences.category_proof
83 (Preferences.bool_pref full_types
84 "Sledgehammer: Full Types" "ATPs will use full type information")
86 type raw_param = string * string list
88 val default_default_params =
91 ("overlord", "false"),
92 ("explicit_apply", "false"),
93 ("respect_no_atp", "true"),
94 ("relevance_threshold", "50"),
95 ("relevance_convergence", "320"),
96 ("theory_relevant", "smart"),
97 ("defs_relevant", "false"),
98 ("isar_proof", "false"),
99 ("isar_shrink_factor", "1"),
100 ("minimize_timeout", "5 s")]
104 val negated_alias_params =
105 [("no_debug", "debug"),
106 ("quiet", "verbose"),
107 ("no_overlord", "overlord"),
108 ("partial_types", "full_types"),
109 ("implicit_apply", "explicit_apply"),
110 ("ignore_no_atp", "respect_no_atp"),
111 ("theory_irrelevant", "theory_relevant"),
112 ("defs_irrelevant", "defs_relevant"),
113 ("no_isar_proof", "isar_proof")]
115 val params_for_minimize =
116 ["debug", "verbose", "overlord", "full_types", "explicit_apply",
117 "isar_proof", "isar_shrink_factor", "minimize_timeout"]
119 val property_dependent_params = ["atps", "full_types", "timeout"]
121 fun is_known_raw_param s =
122 AList.defined (op =) default_default_params s orelse
123 AList.defined (op =) alias_params s orelse
124 AList.defined (op =) negated_alias_params s orelse
125 member (op =) property_dependent_params s
127 fun check_raw_param (s, _) =
128 if is_known_raw_param s then ()
129 else error ("Unknown parameter: " ^ quote s ^ ".")
131 fun unalias_raw_param (name, value) =
132 case AList.lookup (op =) alias_params name of
133 SOME name' => (name', value)
135 case AList.lookup (op =) negated_alias_params name of
136 SOME name' => (name', case value of
137 ["false"] => ["true"]
138 | ["true"] => ["false"]
141 | NONE => (name, value)
143 structure Data = Theory_Data(
144 type T = raw_param list
145 val empty = default_default_params |> map (apsnd single)
147 fun merge p : T = AList.merge (op =) (K true) p)
149 val set_default_raw_param = Data.map o AList.update (op =) o unalias_raw_param
150 fun default_raw_params thy =
152 |> fold (AList.default (op =))
153 [("atps", [case !atps of "" => default_atps_param_value () | s => s]),
154 ("full_types", [if !full_types then "true" else "false"]),
155 ("timeout", let val timeout = !timeout in
156 [if timeout <= 0 then "none"
157 else string_of_int timeout ^ " s"]
160 val infinity_time_in_secs = 60 * 60 * 24 * 365
161 val the_timeout = the_default (Time.fromSeconds infinity_time_in_secs)
163 fun extract_params thy default_params override_params =
165 val override_params = map unalias_raw_param override_params
166 val raw_params = rev override_params @ rev default_params
167 val lookup = Option.map (space_implode " ") o AList.lookup (op =) raw_params
168 val lookup_string = the_default "" o lookup
169 fun general_lookup_bool option default_value name =
171 SOME s => parse_bool_option option name s
172 | NONE => default_value
173 val lookup_bool = the o general_lookup_bool false (SOME false)
174 val lookup_bool_option = general_lookup_bool true NONE
175 fun lookup_time name =
176 the_timeout (case lookup name of
178 | SOME s => parse_time_option name s)
179 fun lookup_int name =
182 | SOME s => case Int.fromString s of
184 | NONE => error ("Parameter " ^ quote name ^
185 " must be assigned an integer value.")
186 val debug = lookup_bool "debug"
187 val verbose = debug orelse lookup_bool "verbose"
188 val overlord = lookup_bool "overlord"
189 val atps = lookup_string "atps" |> space_explode " "
190 val full_types = lookup_bool "full_types"
191 val explicit_apply = lookup_bool "explicit_apply"
192 val respect_no_atp = lookup_bool "respect_no_atp"
193 val relevance_threshold =
194 0.01 * Real.fromInt (lookup_int "relevance_threshold")
195 val relevance_convergence =
196 0.01 * Real.fromInt (lookup_int "relevance_convergence")
197 val theory_relevant = lookup_bool_option "theory_relevant"
198 val defs_relevant = lookup_bool "defs_relevant"
199 val isar_proof = lookup_bool "isar_proof"
200 val isar_shrink_factor = Int.max (1, lookup_int "isar_shrink_factor")
201 val timeout = lookup_time "timeout"
202 val minimize_timeout = lookup_time "minimize_timeout"
204 {debug = debug, verbose = verbose, overlord = overlord, atps = atps,
205 full_types = full_types, explicit_apply = explicit_apply,
206 respect_no_atp = respect_no_atp, relevance_threshold = relevance_threshold,
207 relevance_convergence = relevance_convergence,
208 theory_relevant = theory_relevant, defs_relevant = defs_relevant,
209 isar_proof = isar_proof, isar_shrink_factor = isar_shrink_factor,
210 timeout = timeout, minimize_timeout = minimize_timeout}
213 fun get_params thy = extract_params thy (default_raw_params thy)
214 fun default_params thy = get_params thy o map (apsnd single)
216 val subgoal_count = Logic.count_prems o prop_of o #goal o Proof.goal
218 (* Sledgehammer the given subgoal *)
220 fun run {atps = [], ...} _ _ _ _ = error "No ATP is set."
221 | run (params as {atps, timeout, ...}) i relevance_override minimize_command
223 case subgoal_count state of
224 0 => priority "No subgoal!"
227 val birth_time = Time.now ()
228 val death_time = Time.+ (birth_time, timeout)
229 val _ = kill_atps () (* race w.r.t. other Sledgehammer invocations *)
230 val _ = priority "Sledgehammering..."
231 val _ = app (start_prover_thread params birth_time death_time i n
232 relevance_override minimize_command
236 fun minimize override_params i frefs state =
238 val thy = Proof.theory_of state
239 val ctxt = Proof.context_of state
240 val chained_ths = #facts (Proof.goal state)
241 fun theorems_from_ref ctxt fref =
243 val ths = ProofContext.get_fact ctxt fref
244 val name = Facts.string_of_ref fref
245 |> forall (member Thm.eq_thm chained_ths) ths
246 ? prefix chained_prefix
248 val name_thms_pairs = map (theorems_from_ref ctxt) frefs
250 case subgoal_count state of
251 0 => priority "No subgoal!"
252 | n => priority (#2 (minimize_theorems (get_params thy override_params) i n
253 state name_thms_pairs))
256 val sledgehammerN = "sledgehammer"
257 val sledgehammer_paramsN = "sledgehammer_params"
260 val minimizeN = "minimize"
261 val messagesN = "messages"
262 val available_atpsN = "available_atps"
263 val running_atpsN = "running_atps"
264 val kill_atpsN = "kill_atps"
265 val refresh_tptpN = "refresh_tptp"
268 fun minimizize_raw_param_name "timeout" = "minimize_timeout"
269 | minimizize_raw_param_name name = name
271 val is_raw_param_relevant_for_minimize =
272 member (op =) params_for_minimize o fst o unalias_raw_param
273 fun string_for_raw_param (key, values) =
274 key ^ (case space_implode " " values of "" => "" | value => " = " ^ value)
276 fun minimize_command override_params i atp_name fact_names =
277 sledgehammerN ^ " " ^ minimizeN ^ " [atp = " ^ atp_name ^
278 (override_params |> filter is_raw_param_relevant_for_minimize
279 |> implode o map (prefix ", " o string_for_raw_param)) ^
280 "] (" ^ space_implode " " fact_names ^ ")" ^
281 (if i = 1 then "" else " " ^ string_of_int i)
283 fun hammer_away override_params subcommand opt_i relevance_override state =
285 val thy = Proof.theory_of state
286 val _ = app check_raw_param override_params
288 if subcommand = runN then
289 let val i = the_default 1 opt_i in
290 run (get_params thy override_params) i relevance_override
291 (minimize_command override_params i) state
293 else if subcommand = minimizeN then
294 minimize (map (apfst minimizize_raw_param_name) override_params)
295 (the_default 1 opt_i) (#add relevance_override) state
296 else if subcommand = messagesN then
298 else if subcommand = available_atpsN then
300 else if subcommand = running_atpsN then
302 else if subcommand = kill_atpsN then
304 else if subcommand = refresh_tptpN then
305 refresh_systems_on_tptp ()
307 error ("Unknown subcommand: " ^ quote subcommand ^ ".")
310 fun sledgehammer_trans (((subcommand, params), relevance_override), opt_i) =
311 Toplevel.keep (hammer_away params subcommand opt_i relevance_override
314 fun string_for_raw_param (name, value) = name ^ " = " ^ space_implode " " value
316 fun sledgehammer_params_trans params =
318 (fold set_default_raw_param params
320 writeln ("Default parameters for Sledgehammer:\n" ^
321 (case rev (default_raw_params thy) of
324 (map check_raw_param params;
325 params |> map string_for_raw_param
326 |> sort_strings |> cat_lines)))))
328 val parse_key = Scan.repeat1 Parse.typ_group >> space_implode " "
329 val parse_value = Scan.repeat1 Parse.xname
330 val parse_param = parse_key -- Scan.optional (Parse.$$$ "=" |-- parse_value) []
331 val parse_params = Scan.optional (Args.bracks (Parse.list parse_param)) []
332 val parse_fact_refs =
333 Scan.repeat1 (Scan.unless (Parse.name -- Args.colon)
334 (Parse.xname -- Scan.option Attrib.thm_sel)
335 >> (fn (name, interval) =>
336 Facts.Named ((name, Position.none), interval)))
337 val parse_relevance_chunk =
338 (Args.add |-- Args.colon |-- parse_fact_refs >> add_to_relevance_override)
339 || (Args.del |-- Args.colon |-- parse_fact_refs
340 >> del_from_relevance_override)
341 || (parse_fact_refs >> only_relevance_override)
342 val parse_relevance_override =
343 Scan.optional (Args.parens (Scan.repeat parse_relevance_chunk
344 >> merge_relevance_overrides))
345 (add_to_relevance_override [])
346 val parse_sledgehammer_command =
347 (Scan.optional Parse.short_ident runN -- parse_params -- parse_relevance_override
348 -- Scan.option Parse.nat) #>> sledgehammer_trans
349 val parse_sledgehammer_params_command =
350 parse_params #>> sledgehammer_params_trans
353 Outer_Syntax.improper_command sledgehammerN
354 "search for first-order proof using automatic theorem provers" Keyword.diag
355 parse_sledgehammer_command
357 Outer_Syntax.command sledgehammer_paramsN
358 "set and display the default parameters for Sledgehammer" Keyword.thy_decl
359 parse_sledgehammer_params_command