1 (* Title: HOL/Tools/Sledgehammer/sledgehammer_mash.ML
2 Author: Jasmin Blanchette, TU Muenchen
4 Sledgehammer's machine-learning-based relevance filter (MaSh).
7 signature SLEDGEHAMMER_MASH =
9 type stature = ATP_Problem_Generate.stature
10 type fact = Sledgehammer_Fact.fact
11 type fact_override = Sledgehammer_Fact.fact_override
12 type params = Sledgehammer_Provers.params
13 type relevance_fudge = Sledgehammer_Provers.relevance_fudge
14 type prover_result = Sledgehammer_Provers.prover_result
16 val trace : bool Config.T
22 val learn_isarN : string
23 val learn_atpN : string
24 val relearn_isarN : string
25 val relearn_atpN : string
26 val fact_filters : string list
27 val escape_meta : string -> string
28 val escape_metas : string list -> string
29 val unescape_meta : string -> string
30 val unescape_metas : string -> string list
31 val extract_query : string -> string * (string * real) list
32 val nickname_of : thm -> string
34 (string * 'a) list -> ('b * thm) list -> (('b * thm) * 'a) list
36 int -> ((('a * thm) * real) list * ('a * thm) list) list -> ('a * thm) list
37 val theory_ord : theory * theory -> order
38 val thm_ord : thm * thm -> order
39 val goal_of_thm : theory -> thm -> thm
40 val run_prover_for_mash :
41 Proof.context -> params -> string -> fact list -> thm -> prover_result
43 Proof.context -> string -> theory -> stature -> term list -> string list
44 val isar_dependencies_of : unit Symtab.table -> thm -> string list option
45 val atp_dependencies_of :
46 Proof.context -> params -> string -> int -> fact list -> unit Symtab.table
47 -> thm -> string list option
48 val mash_CLEAR : Proof.context -> unit
51 -> (string * string list * string list * string list) list -> unit
53 Proof.context -> bool -> (string * string list) list -> unit
55 Proof.context -> bool -> int -> string list * string list
56 -> (string * real) list
57 val mash_unlearn : Proof.context -> unit
58 val mash_could_suggest_facts : unit -> bool
59 val mash_can_suggest_facts : Proof.context -> bool
60 val mash_suggested_facts :
61 Proof.context -> params -> string -> int -> term list -> term
62 -> ('a * thm) list -> (('a * thm) * real) list * ('a * thm) list
63 val mash_learn_proof :
64 Proof.context -> params -> string -> term -> ('a * thm) list -> thm list
67 Proof.context -> params -> fact_override -> thm list -> bool -> unit
69 Proof.context -> params -> string -> int -> fact_override -> term list
70 -> term -> fact list -> fact list
71 val kill_learners : unit -> unit
72 val running_learners : unit -> unit
75 structure Sledgehammer_MaSh : SLEDGEHAMMER_MASH =
79 open ATP_Problem_Generate
80 open Sledgehammer_Util
81 open Sledgehammer_Fact
82 open Sledgehammer_Provers
83 open Sledgehammer_Minimize
84 open Sledgehammer_MePo
87 Attrib.setup_config_bool @{binding sledgehammer_mash_trace} (K false)
88 fun trace_msg ctxt msg = if Config.get ctxt trace then tracing (msg ()) else ()
96 val fact_filters = [meshN, mepoN, mashN]
98 val unlearnN = "unlearn"
99 val learn_isarN = "learn_isar"
100 val learn_atpN = "learn_atp"
101 val relearn_isarN = "relearn_isar"
102 val relearn_atpN = "relearn_atp"
104 fun mash_home () = getenv "MASH_HOME"
105 fun mash_model_dir () =
106 getenv "ISABELLE_HOME_USER" ^ "/mash"
107 |> tap (Isabelle_System.mkdir o Path.explode)
108 val mash_state_dir = mash_model_dir
109 fun mash_state_path () = mash_state_dir () ^ "/state" |> Path.explode
112 (*** Isabelle helpers ***)
115 if Char.isAlphaNum c orelse c = #"_" orelse c = #"." orelse c = #"(" orelse
116 c = #")" orelse c = #"," then
119 (* fixed width, in case more digits follow *)
120 "%" ^ stringN_of_int 3 (Char.ord c)
122 fun unmeta_chars accum [] = String.implode (rev accum)
123 | unmeta_chars accum (#"%" :: d1 :: d2 :: d3 :: cs) =
124 (case Int.fromString (String.implode [d1, d2, d3]) of
125 SOME n => unmeta_chars (Char.chr n :: accum) cs
126 | NONE => "" (* error *))
127 | unmeta_chars _ (#"%" :: _) = "" (* error *)
128 | unmeta_chars accum (c :: cs) = unmeta_chars (c :: accum) cs
130 val escape_meta = String.translate meta_char
131 val escape_metas = map escape_meta #> space_implode " "
132 val unescape_meta = String.explode #> unmeta_chars []
134 space_explode " " #> filter_out (curry (op =) "") #> map unescape_meta
136 fun extract_node line =
137 case space_explode ":" line of
138 [name, parents] => (unescape_meta name, unescape_metas parents)
141 fun extract_suggestion sugg =
142 case space_explode "=" sugg of
144 SOME (unescape_meta name, Real.fromString weight |> the_default 0.0)
147 fun extract_query line =
148 case space_explode ":" line of
151 map_filter extract_suggestion (space_explode " " suggs))
154 fun parent_of_local_thm th =
156 val thy = th |> Thm.theory_of_thm
157 val facts = thy |> Global_Theory.facts_of
158 val space = facts |> Facts.space_of
159 fun id_of s = #id (Name_Space.the_entry space s)
160 fun max_id (s', _) (s, id) =
161 let val id' = id_of s' in if id > id' then (s, id) else (s', id') end
162 in ("", ~1) |> Facts.fold_static max_id facts |> fst end
164 val local_prefix = "local" ^ Long_Name.separator
167 if Thm.has_name_hint th then
168 let val hint = Thm.get_name_hint th in
169 (* FIXME: There must be a better way to detect local facts. *)
170 case try (unprefix local_prefix) hint of
172 parent_of_local_thm th ^ Long_Name.separator ^ Long_Name.separator ^ suf
178 fun suggested_facts suggs facts =
180 fun add_fact (fact as (_, th)) = Symtab.default (nickname_of th, fact)
181 val tab = Symtab.empty |> fold add_fact facts
182 fun find_sugg (name, weight) =
183 Symtab.lookup tab name |> Option.map (rpair weight)
184 in map_filter find_sugg suggs end
188 Real.ceil (100000000.0 * fold (curry (op +)) xs 0.0) div length xs
190 fun normalize_scores [] = []
191 | normalize_scores ((fact, score) :: tail) =
192 (fact, 1.0) :: map (apsnd (curry Real.* (1.0 / score))) tail
194 fun mesh_facts max_facts [(sels, unks)] =
195 map fst (take max_facts sels) @ take (max_facts - length sels) unks
196 | mesh_facts max_facts mess =
198 val mess = mess |> map (apfst (normalize_scores #> `length))
199 val fact_eq = Thm.eq_thm o pairself snd
200 fun score_at sels = try (nth sels) #> Option.map snd
201 fun score_in fact ((sel_len, sels), unks) =
202 case find_index (curry fact_eq fact o fst) sels of
203 ~1 => (case find_index (curry fact_eq fact) unks of
204 ~1 => score_at sels sel_len
206 | rank => score_at sels rank
207 fun weight_of fact = mess |> map_filter (score_in fact) |> sum_avg
209 fold (union fact_eq o map fst o take max_facts o snd o fst) mess []
211 facts |> map (`weight_of) |> sort (int_ord o swap o pairself fst)
212 |> map snd |> take max_facts
215 val thy_feature_name_of = prefix "y"
216 val const_name_of = prefix "c"
217 val type_name_of = prefix "t"
218 val class_name_of = prefix "s"
221 if Theory.eq_thy p then
223 else if Theory.subthy p then
225 else if Theory.subthy (swap p) then
227 else case int_ord (pairself (length o Theory.ancestors_of) p) of
228 EQUAL => string_ord (pairself Context.theory_name p)
231 val thm_ord = theory_ord o pairself theory_of_thm
233 val freezeT = Type.legacy_freeze_type
235 fun freeze (t $ u) = freeze t $ freeze u
236 | freeze (Abs (s, T, t)) = Abs (s, freezeT T, freeze t)
237 | freeze (Var ((s, _), T)) = Free (s, freezeT T)
238 | freeze (Const (s, T)) = Const (s, freezeT T)
239 | freeze (Free (s, T)) = Free (s, freezeT T)
242 fun goal_of_thm thy = prop_of #> freeze #> cterm_of thy #> Goal.init
244 fun run_prover_for_mash ctxt params prover facts goal =
247 {state = Proof.init ctxt, goal = goal, subgoal = 1, subgoal_count = 1,
248 facts = facts |> map (apfst (apfst (fn name => name ())))
249 |> map Untranslated_Fact}
251 get_minimizing_prover ctxt MaSh (K (K ())) prover params (K (K (K "")))
255 val bad_types = [@{type_name prop}, @{type_name bool}, @{type_name fun}]
258 [@{const_name prop}, @{const_name Pure.conjunction}] @ atp_logical_consts
260 fun interesting_terms_types_and_classes ctxt prover term_max_depth
263 fun is_bad_const (x as (s, _)) args =
264 member (op =) logical_consts s orelse
265 fst (is_built_in_const_for_prover ctxt prover x args)
266 fun add_classes @{sort type} = I
267 | add_classes S = union (op =) (map class_name_of S)
268 fun do_add_type (Type (s, Ts)) =
269 (not (member (op =) bad_types s) ? insert (op =) (type_name_of s))
270 #> fold do_add_type Ts
271 | do_add_type (TFree (_, S)) = add_classes S
272 | do_add_type (TVar (_, S)) = add_classes S
273 fun add_type T = type_max_depth >= 0 ? do_add_type T
275 if member (op <>) args "" then s ^ "(" ^ space_implode "," args ^ ")"
277 fun patternify ~1 _ = ""
278 | patternify depth t =
280 (Const (x as (s, _)), args) =>
281 if is_bad_const x args then ""
282 else mk_app (const_name_of s) (map (patternify (depth - 1)) args)
284 fun add_pattern depth t =
285 case patternify depth t of "" => I | s => insert (op =) s
286 fun add_term_patterns ~1 _ = I
287 | add_term_patterns depth t =
288 add_pattern depth t #> add_term_patterns (depth - 1) t
289 val add_term = add_term_patterns term_max_depth
291 let val (head, args) = strip_comb t in
293 Const (_, T) => add_term t #> add_type T
294 | Free (_, T) => add_type T
295 | Var (_, T) => add_type T
296 | Abs (_, T, body) => add_type T #> add_patterns body
298 #> fold add_patterns args
300 in [] |> fold add_patterns ts end
302 fun is_exists (s, _) = (s = @{const_name Ex} orelse s = @{const_name Ex1})
304 val term_max_depth = 1
305 val type_max_depth = 1
307 (* TODO: Generate type classes for types? *)
308 fun features_of ctxt prover thy (scope, status) ts =
309 thy_feature_name_of (Context.theory_name thy) ::
310 interesting_terms_types_and_classes ctxt prover term_max_depth type_max_depth
312 |> forall is_lambda_free ts ? cons "no_lams"
313 |> forall (not o exists_Const is_exists) ts ? cons "no_skos"
314 |> scope <> Global ? cons "local"
317 | Induction => cons "induction"
318 | Intro => cons "intro"
319 | Inductive => cons "inductive"
320 | Elim => cons "elim"
321 | Simp => cons "simp"
324 (* Too many dependencies is a sign that a decision procedure is at work. There
325 isn't much too learn from such proofs. *)
326 val max_dependencies = 10
327 val atp_dependency_default_max_fact = 50
329 fun trim_dependencies deps =
330 if length deps <= max_dependencies then SOME deps else NONE
332 fun isar_dependencies_of all_names =
333 thms_in_proof (SOME all_names) #> trim_dependencies
335 fun atp_dependencies_of ctxt (params as {verbose, max_facts, ...}) prover
336 auto_level facts all_names th =
337 case isar_dependencies_of all_names th of
341 val thy = Proof_Context.theory_of ctxt
342 val goal = goal_of_thm thy th
343 val (_, hyp_ts, concl_t) = ATP_Util.strip_subgoal ctxt goal 1
344 val facts = facts |> filter (fn (_, th') => thm_ord (th', th) = LESS)
345 fun fix_name ((_, stature), th) = ((fn () => nickname_of th, stature), th)
346 fun is_dep dep (_, th) = nickname_of th = dep
347 fun add_isar_dep facts dep accum =
348 if exists (is_dep dep) accum then
350 else case find_first (is_dep dep) facts of
351 SOME ((name, status), th) => accum @ [((name, status), th)]
352 | NONE => accum (* shouldn't happen *)
354 facts |> mepo_suggested_facts ctxt params prover
355 (max_facts |> the_default atp_dependency_default_max_fact)
357 |> fold (add_isar_dep facts) (these isar_deps)
360 if verbose andalso auto_level = 0 then
361 let val num_facts = length facts in
362 "MaSh: " ^ quote prover ^ " on " ^ quote (nickname_of th) ^
363 " with " ^ string_of_int num_facts ^ " fact" ^ plural_s num_facts ^
365 |> Output.urgent_message
369 case run_prover_for_mash ctxt params prover facts goal of
370 {outcome = NONE, used_facts, ...} =>
371 (if verbose andalso auto_level = 0 then
372 let val num_facts = length used_facts in
373 "Found proof with " ^ string_of_int num_facts ^ " fact" ^
374 plural_s num_facts ^ "."
375 |> Output.urgent_message
379 used_facts |> map fst |> trim_dependencies)
384 (*** Low-level communication with MaSh ***)
386 (* more friendly than "try o File.rm" for those who keep the files open in their
388 fun wipe_out file = File.write file ""
390 fun write_file (xs, f) file =
391 let val path = Path.explode file in
394 |> List.app (File.append path o space_implode "" o map f)
397 fun run_mash_tool ctxt overlord save max_suggs write_cmds read_suggs =
399 val (temp_dir, serial) =
400 if overlord then (getenv "ISABELLE_HOME_USER", "")
401 else (getenv "ISABELLE_TMP", serial_string ())
402 val log_file = if overlord then temp_dir ^ "/mash_log" else "/dev/null"
403 val err_file = temp_dir ^ "/mash_err" ^ serial
404 val sugg_file = temp_dir ^ "/mash_suggs" ^ serial
405 val cmd_file = temp_dir ^ "/mash_commands" ^ serial
407 "--inputFile " ^ cmd_file ^ " --predictions " ^ sugg_file ^
408 " --numberOfPredictions " ^ string_of_int max_suggs ^
409 (if save then " --saveModel" else "")
411 mash_home () ^ "/mash --quiet --outputDir " ^ mash_model_dir () ^
412 " --log " ^ log_file ^ " " ^ core ^ " >& " ^ err_file
414 write_file ([], K "") sugg_file;
415 write_file write_cmds cmd_file;
416 trace_msg ctxt (fn () => "Running " ^ command);
417 Isabelle_System.bash command;
418 read_suggs (fn () => try File.read_lines (Path.explode sugg_file) |> these)
419 |> tap (fn _ => trace_msg ctxt (fn () =>
420 case try File.read (Path.explode err_file) of
423 | SOME s => "Error: " ^ elide_string 1000 s))
425 ? tap (fn _ => List.app (wipe_out o Path.explode)
426 [err_file, sugg_file, cmd_file])
429 fun str_of_add (name, parents, feats, deps) =
430 "! " ^ escape_meta name ^ ": " ^ escape_metas parents ^ "; " ^
431 escape_metas feats ^ "; " ^ escape_metas deps ^ "\n"
433 fun str_of_reprove (name, deps) =
434 "p " ^ escape_meta name ^ ": " ^ escape_metas deps ^ "\n"
436 fun str_of_query (parents, feats) =
437 "? " ^ escape_metas parents ^ "; " ^ escape_metas feats ^ "\n"
439 fun mash_CLEAR ctxt =
440 let val path = mash_model_dir () |> Path.explode in
441 trace_msg ctxt (K "MaSh CLEAR");
442 File.fold_dir (fn file => fn _ =>
443 try File.rm (Path.append path (Path.basic file)))
448 fun mash_ADD _ _ [] = ()
449 | mash_ADD ctxt overlord adds =
450 (trace_msg ctxt (fn () => "MaSh ADD " ^
451 elide_string 1000 (space_implode " " (map #1 adds)));
452 run_mash_tool ctxt overlord true 0 (adds, str_of_add) (K ()))
454 fun mash_REPROVE _ _ [] = ()
455 | mash_REPROVE ctxt overlord reps =
456 (trace_msg ctxt (fn () => "MaSh REPROVE " ^
457 elide_string 1000 (space_implode " " (map #1 reps)));
458 run_mash_tool ctxt overlord true 0 (reps, str_of_reprove) (K ()))
460 fun mash_QUERY ctxt overlord max_suggs (query as (_, feats)) =
461 (trace_msg ctxt (fn () => "MaSh QUERY " ^ space_implode " " feats);
462 run_mash_tool ctxt overlord false max_suggs
463 ([query], str_of_query)
467 | suggs => snd (extract_query (List.last suggs)))
468 handle List.Empty => [])
471 (*** High-level communication with MaSh ***)
473 fun try_graph ctxt when def f =
475 handle Graph.CYCLES (cycle :: _) =>
476 (trace_msg ctxt (fn () =>
477 "Cycle involving " ^ commas cycle ^ " when " ^ when); def)
479 (trace_msg ctxt (fn () =>
480 "Duplicate fact " ^ quote name ^ " when " ^ when); def)
481 | Graph.UNDEF name =>
482 (trace_msg ctxt (fn () =>
483 "Unknown fact " ^ quote name ^ " when " ^ when); def)
485 if Exn.is_interrupt exn then
488 (trace_msg ctxt (fn () =>
489 "Internal error when " ^ when ^ ":\n" ^
490 ML_Compiler.exn_message exn); def)
493 string_of_int (length (Graph.keys G)) ^ " node(s), " ^
494 string_of_int (fold (Integer.add o length o snd) (Graph.dest G) 0) ^
496 string_of_int (length (Graph.minimals G)) ^ " minimal, " ^
497 string_of_int (length (Graph.maximals G)) ^ " maximal"
499 type mash_state = {fact_G : unit Graph.T}
501 val empty_state = {fact_G = Graph.empty}
505 val version = "*** MaSh 0.0 ***"
507 fun load _ (state as (true, _)) = state
509 let val path = mash_state_path () in
511 case try File.read_lines path of
512 SOME (version' :: node_lines) =>
514 fun add_edge_to name parent =
515 Graph.default_node (parent, ()) #> Graph.add_edge (parent, name)
517 case extract_node line of
518 ("", _) => I (* shouldn't happen *)
520 Graph.default_node (name, ()) #> fold (add_edge_to name) parents
522 try_graph ctxt "loading state" Graph.empty (fn () =>
523 Graph.empty |> version' = version ? fold add_node node_lines)
525 trace_msg ctxt (fn () =>
526 "Loaded fact graph (" ^ graph_info fact_G ^ ")");
532 fun save ctxt {fact_G} =
534 val path = mash_state_path ()
535 fun fact_line_for name parents =
536 escape_meta name ^ ": " ^ escape_metas parents
537 val append_fact = File.append path o suffix "\n" oo fact_line_for
538 fun append_entry (name, ((), (parents, _))) () =
539 append_fact name (Graph.Keys.dest parents)
541 File.write path (version ^ "\n");
542 Graph.fold append_entry fact_G ();
543 trace_msg ctxt (fn () => "Saved fact graph (" ^ graph_info fact_G ^ ")")
547 Synchronized.var "Sledgehammer_MaSh.global_state" (false, empty_state)
551 fun mash_map ctxt f =
552 Synchronized.change global_state (load ctxt ##> (f #> tap (save ctxt)))
554 fun mash_peek ctxt f =
555 Synchronized.change_result global_state (load ctxt #> `snd #>> f)
558 Synchronized.change_result global_state (load ctxt #> `snd)
560 fun mash_unlearn ctxt =
561 Synchronized.change global_state (fn _ =>
562 (mash_CLEAR ctxt; wipe_out (mash_state_path ()); (true, empty_state)))
566 fun mash_could_suggest_facts () = mash_home () <> ""
567 fun mash_can_suggest_facts ctxt = not (Graph.is_empty (#fact_G (mash_get ctxt)))
569 fun num_keys keys = Graph.Keys.fold (K (Integer.add 1)) keys 0
571 fun maximal_in_graph fact_G facts =
573 val facts = [] |> fold (cons o nickname_of o snd) facts
574 val tab = Symtab.empty |> fold (fn name => Symtab.default (name, ())) facts
575 fun insert_new seen name =
576 not (Symtab.defined seen name) ? insert (op =) name
577 fun find_maxes _ (maxs, []) = map snd maxs
578 | find_maxes seen (maxs, new :: news) =
580 (seen |> num_keys (Graph.imm_succs fact_G new) > 1
581 ? Symtab.default (new, ()))
582 (if Symtab.defined tab new then
584 val newp = Graph.all_preds fact_G [new]
585 fun is_ancestor x yp = member (op =) yp x
587 maxs |> filter (fn (_, max) => not (is_ancestor max newp))
589 if exists (is_ancestor new o fst) maxs then
593 :: filter_out (fn (_, max) => is_ancestor max newp) maxs,
597 (maxs, Graph.Keys.fold (insert_new seen)
598 (Graph.imm_preds fact_G new) news))
599 in find_maxes Symtab.empty ([], Graph.maximals fact_G) end
601 (* Generate more suggestions than requested, because some might be thrown out
602 later for various reasons and "meshing" gives better results with some
604 fun max_suggs_of max_facts = max_facts + Int.min (50, max_facts)
606 fun is_fact_in_graph fact_G (_, th) =
607 can (Graph.get_node fact_G) (nickname_of th)
609 fun mash_suggested_facts ctxt ({overlord, ...} : params) prover max_facts hyp_ts
612 val thy = Proof_Context.theory_of ctxt
613 val (fact_G, suggs) =
614 mash_peek ctxt (fn {fact_G} =>
615 if Graph.is_empty fact_G then
619 val parents = maximal_in_graph fact_G facts
621 features_of ctxt prover thy (Local, General) (concl_t :: hyp_ts)
623 (fact_G, mash_QUERY ctxt overlord (max_suggs_of max_facts)
627 facts |> suggested_facts suggs
628 (* The weights currently returned by "mash.py" are too extreme to
630 |> map fst |> weight_mepo_facts
631 val unknown = facts |> filter_out (is_fact_in_graph fact_G)
632 in (selected, unknown) end
634 fun add_to_fact_graph ctxt (name, parents, feats, deps) (adds, graph) =
636 fun maybe_add_from from (accum as (parents, graph)) =
637 try_graph ctxt "updating graph" accum (fn () =>
638 (from :: parents, Graph.add_edge_acyclic (from, name) graph))
639 val graph = graph |> Graph.default_node (name, ())
640 val (parents, graph) = ([], graph) |> fold maybe_add_from parents
641 val (deps, _) = ([], graph) |> fold maybe_add_from deps
642 in ((name, parents, feats, deps) :: adds, graph) end
644 val learn_timeout_slack = 2.0
646 fun launch_thread timeout task =
648 val hard_timeout = time_mult learn_timeout_slack timeout
649 val birth_time = Time.now ()
650 val death_time = Time.+ (birth_time, hard_timeout)
651 val desc = ("machine learner for Sledgehammer", "")
652 in Async_Manager.launch MaShN birth_time death_time desc task end
654 fun freshish_name () =
655 Date.fmt ".%Y_%m_%d_%H_%M_%S__" (Date.fromTimeLocal (Time.now ())) ^
658 fun mash_learn_proof ctxt ({overlord, timeout, ...} : params) prover t facts
660 if is_smt_prover ctxt prover then
663 launch_thread timeout (fn () =>
665 val thy = Proof_Context.theory_of ctxt
666 val name = freshish_name ()
667 val feats = features_of ctxt prover thy (Local, General) [t]
668 val deps = used_ths |> map nickname_of
670 mash_peek ctxt (fn {fact_G} =>
671 let val parents = maximal_in_graph fact_G facts in
672 mash_ADD ctxt overlord [(name, parents, feats, deps)]
678 Markup.markup Isabelle_Markup.sendback (sledgehammerN ^ " " ^ sub)
680 val commit_timeout = seconds 30.0
682 (* The timeout is understood in a very slack fashion. *)
683 fun mash_learn_facts ctxt (params as {debug, verbose, overlord, ...}) prover
684 auto_level atp learn_timeout facts =
686 val timer = Timer.startRealTimer ()
687 fun next_commit_time () =
688 Time.+ (Timer.checkRealTimer timer, commit_timeout)
689 val {fact_G} = mash_get ctxt
690 val (old_facts, new_facts) =
691 facts |> List.partition (is_fact_in_graph fact_G)
692 ||> sort (thm_ord o pairself snd)
694 if null new_facts andalso (not atp orelse null old_facts) then
695 if auto_level < 2 then
696 "No new " ^ (if atp then "ATP" else "Isar") ^ " proofs to learn." ^
697 (if auto_level = 0 andalso not atp then
698 "\n\nHint: Try " ^ sendback learn_atpN ^ " to learn from ATP proofs."
707 |> filter_out is_likely_tautology_or_too_meta
708 |> map (rpair () o nickname_of)
712 atp_dependencies_of ctxt params prover auto_level facts all_names
714 isar_dependencies_of all_names
715 fun do_commit [] [] state = state
716 | do_commit adds reps {fact_G} =
719 ([], fact_G) |> fold (add_to_fact_graph ctxt) adds
721 mash_ADD ctxt overlord (rev adds);
722 mash_REPROVE ctxt overlord reps;
725 fun commit last adds reps =
726 (if debug andalso auto_level = 0 then
727 Output.urgent_message "Committing..."
730 mash_map ctxt (do_commit (rev adds) reps);
731 if not last andalso auto_level = 0 then
732 let val num_proofs = length adds + length reps in
733 "Learned " ^ string_of_int num_proofs ^ " " ^
734 (if atp then "ATP" else "Isar") ^ " proof" ^
735 plural_s num_proofs ^ " in the last " ^
736 string_from_time commit_timeout ^ "."
737 |> Output.urgent_message
741 fun learn_new_fact _ (accum as (_, (_, _, _, true))) = accum
742 | learn_new_fact ((_, stature), th)
743 (adds, (parents, n, next_commit, _)) =
745 val name = nickname_of th
747 features_of ctxt prover (theory_of_thm th) stature [prop_of th]
748 val deps = deps_of th |> these
749 val n = n |> not (null deps) ? Integer.add 1
750 val adds = (name, parents, feats, deps) :: adds
751 val (adds, next_commit) =
752 if Time.> (Timer.checkRealTimer timer, next_commit) then
753 (commit false adds []; ([], next_commit_time ()))
756 val timed_out = Time.> (Timer.checkRealTimer timer, learn_timeout)
757 in (adds, ([name], n, next_commit, timed_out)) end
759 if null new_facts then
763 val last_th = new_facts |> List.last |> snd
764 (* crude approximation *)
767 |> filter (fn (_, th) => thm_ord (th, last_th) <> GREATER)
768 val parents = maximal_in_graph fact_G ancestors
769 val (adds, (_, n, _, _)) =
770 ([], (parents, 0, next_commit_time (), false))
771 |> fold learn_new_fact new_facts
772 in commit true adds []; n end
773 fun relearn_old_fact _ (accum as (_, (_, _, true))) = accum
774 | relearn_old_fact (_, th) (reps, (n, next_commit, _)) =
776 val name = nickname_of th
779 SOME deps => (n + 1, (name, deps) :: reps)
781 val (reps, next_commit) =
782 if Time.> (Timer.checkRealTimer timer, next_commit) then
783 (commit false [] reps; ([], next_commit_time ()))
786 val timed_out = Time.> (Timer.checkRealTimer timer, learn_timeout)
787 in (reps, (n, next_commit, timed_out)) end
789 if not atp orelse null old_facts then
793 fun priority_of (_, th) =
794 random_range 0 (1000 * max_dependencies)
795 - 500 * (th |> isar_dependencies_of all_names
797 |> the_default max_dependencies)
799 old_facts |> map (`priority_of)
800 |> sort (int_ord o pairself fst)
802 val (reps, (n, _, _)) =
803 ([], (n, next_commit_time (), false))
804 |> fold relearn_old_fact old_facts
805 in commit true [] reps; n end
807 if verbose orelse auto_level < 2 then
808 "Learned " ^ string_of_int n ^ " nontrivial " ^
809 (if atp then "ATP" else "Isar") ^ " proof" ^ plural_s n ^
811 " in " ^ string_from_time (Timer.checkRealTimer timer)
819 fun mash_learn ctxt (params as {provers, timeout, ...}) fact_override chained
822 val css = Sledgehammer_Fact.clasimpset_rule_table_of ctxt
823 val ctxt = ctxt |> Config.put instantiate_inducts false
825 nearly_all_facts ctxt false fact_override Symtab.empty css chained []
827 val num_facts = length facts
828 val prover = hd provers
829 fun learn auto_level atp =
830 mash_learn_facts ctxt params prover auto_level atp infinite_timeout facts
831 |> Output.urgent_message
834 ("MaShing through " ^ string_of_int num_facts ^ " fact" ^
835 plural_s num_facts ^ " for ATP proofs (" ^ quote prover ^ " timeout: " ^
836 string_from_time timeout ^ ").\n\nCollecting Isar proofs first..."
837 |> Output.urgent_message;
839 "Now collecting ATP proofs. This may take several hours. You can \
840 \safely stop the learning process at any point."
841 |> Output.urgent_message;
844 ("MaShing through " ^ string_of_int num_facts ^ " fact" ^
845 plural_s num_facts ^ " for Isar proofs..."
846 |> Output.urgent_message;
850 (* The threshold should be large enough so that MaSh doesn't kick in for Auto
851 Sledgehammer and Try. *)
852 val min_secs_for_learning = 15
854 fun relevant_facts ctxt (params as {learn, fact_filter, timeout, ...}) prover
855 max_facts ({add, only, ...} : fact_override) hyp_ts concl_t facts =
856 if not (subset (op =) (the_list fact_filter, fact_filters)) then
857 error ("Unknown fact filter: " ^ quote (the fact_filter) ^ ".")
860 else if max_facts <= 0 orelse null facts then
865 if learn andalso not (Async_Manager.has_running_threads MaShN) andalso
866 Time.toSeconds timeout >= min_secs_for_learning then
867 let val timeout = time_mult learn_timeout_slack timeout in
868 launch_thread timeout
869 (fn () => (true, mash_learn_facts ctxt params prover 2 false
876 SOME ff => (() |> ff <> mepoN ? maybe_learn; ff)
878 if is_smt_prover ctxt prover then
880 else if mash_could_suggest_facts () then
882 if mash_can_suggest_facts ctxt then meshN else mepoN)
885 val add_ths = Attrib.eval_thms ctxt add
886 fun prepend_facts ths accepts =
887 ((facts |> filter (member Thm.eq_thm_prop ths o snd)) @
888 (accepts |> filter_out (member Thm.eq_thm_prop ths o snd)))
891 facts |> mepo_suggested_facts ctxt params prover max_facts NONE hyp_ts
895 mash_suggested_facts ctxt params prover max_facts hyp_ts concl_t facts
897 [] |> (if fact_filter <> mashN then cons (mepo (), []) else I)
898 |> (if fact_filter <> mepoN then cons (mash ()) else I)
900 mesh_facts max_facts mess
901 |> not (null add_ths) ? prepend_facts add_ths
904 fun kill_learners () = Async_Manager.kill_threads MaShN "learner"
905 fun running_learners () = Async_Manager.running_threads MaShN "learner"