wneuper/isa: src/HOL/Tools/Sledgehammer/sledgehammer

     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.

     5 *)

     7 signature SLEDGEHAMMER_ISAR =

     8 sig

     9   type params = Sledgehammer_Provers.params

    11   val sledgehammerN : string

    12   val auto : bool Unsynchronized.ref

    13   val provers : string Unsynchronized.ref

    14   val timeout : int Unsynchronized.ref

    15   val default_params : Proof.context -> (string * string) list -> params

    16   val setup : theory -> theory

    17 end;

    19 structure Sledgehammer_Isar : SLEDGEHAMMER_ISAR =

    20 struct

    22 open ATP_Util

    23 open ATP_Systems

    24 open ATP_Problem_Generate

    25 open ATP_Proof_Reconstruct

    26 open Sledgehammer_Util

    27 open Sledgehammer_Filter

    28 open Sledgehammer_Provers

    29 open Sledgehammer_Minimize

    30 open Sledgehammer_Run

    32 val sledgehammerN = "sledgehammer"

    33 val sledgehammer_paramsN = "sledgehammer_params"

    35 val runN = "run"

    36 val minN = "min"

    37 val messagesN = "messages"

    38 val supported_proversN = "supported_provers"

    39 val running_proversN = "running_provers"

    40 val kill_proversN = "kill_provers"

    41 val refresh_tptpN = "refresh_tptp"

    43 val auto = Unsynchronized.ref false

    45 val _ =

    46   ProofGeneralPgip.add_preference Preferences.category_tracing

    47       (Preferences.bool_pref auto "auto-sledgehammer"

    48            "Run Sledgehammer automatically.")

    50 (** Sledgehammer commands **)

    52 fun add_relevance_override ns : relevance_override =

    53   {add = ns, del = [], only = false}

    54 fun del_relevance_override ns : relevance_override =

    55   {add = [], del = ns, only = false}

    56 fun only_relevance_override ns : relevance_override =

    57   {add = ns, del = [], only = true}

    58 fun merge_relevance_override_pairwise (r1 : relevance_override)

    59                                       (r2 : relevance_override) =

    60   {add = #add r1 @ #add r2, del = #del r1 @ #del r2,

    61    only = #only r1 andalso #only r2}

    62 fun merge_relevance_overrides rs =

    63   fold merge_relevance_override_pairwise rs (only_relevance_override [])

    65 (*** parameters ***)

    67 val provers = Unsynchronized.ref ""

    68 val timeout = Unsynchronized.ref 30

    70 val _ =

    71   ProofGeneralPgip.add_preference Preferences.category_proof

    72       (Preferences.string_pref provers

    73           "Sledgehammer: Provers"

    74           "Default automatic provers (separated by whitespace)")

    76 val _ =

    77   ProofGeneralPgip.add_preference Preferences.category_proof

    78       (Preferences.int_pref timeout

    79           "Sledgehammer: Time Limit"

    80           "ATPs will be interrupted after this time (in seconds)")

    82 type raw_param = string * string list

    84 val default_default_params =

    85   [("debug", "false"),

    86    ("verbose", "false"),

    87    ("overlord", "false"),

    88    ("blocking", "false"),

    89    ("type_enc", "smart"),

    90    ("strict", "false"),

    91    ("lam_trans", "smart"),

    92    ("relevance_thresholds", "0.45 0.85"),

    93    ("max_relevant", "smart"),

    94    ("max_mono_iters", "3"),

    95    ("max_new_mono_instances", "200"),

    96    ("isar_proof", "false"),

    97    ("isar_shrink_factor", "1"),

    98    ("slice", "true"),

    99    ("minimize", "smart"),

   100    ("preplay_timeout", "3")]

   102 val alias_params =

   103   [("prover", "provers")]

   104 val negated_alias_params =

   105   [("no_debug", "debug"),

   106    ("quiet", "verbose"),

   107    ("no_overlord", "overlord"),

   108    ("non_blocking", "blocking"),

   109    ("non_strict", "strict"),

   110    ("no_isar_proof", "isar_proof"),

   111    ("dont_slice", "slice"),

   112    ("dont_minimize", "minimize")]

   114 val params_for_minimize =

   115   ["debug", "verbose", "overlord", "type_enc", "strict", "lam_trans",

   116    "max_mono_iters", "max_new_mono_instances", "isar_proof",

   117    "isar_shrink_factor", "timeout", "preplay_timeout"]

   119 val property_dependent_params = ["provers", "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 orelse s = "expect"

   127 fun is_prover_list ctxt s =

   128   case space_explode " " s of

   129     ss as _ :: _ => forall (is_prover_supported ctxt) ss

   130   | _ => false

   132 fun unalias_raw_param (name, value) =

   133   case AList.lookup (op =) alias_params name of

   134     SOME name' => (name', value)

   135   | NONE =>

   136     case AList.lookup (op =) negated_alias_params name of

   137       SOME name' => (name', case value of

   138                               ["false"] => ["true"]

   139                             | ["true"] => ["false"]

   140                             | [] => ["false"]

   141                             | _ => value)

   142     | NONE => (name, value)

   144 val any_type_enc = type_enc_from_string Strict "erased"

   146 (* "provers =", "type_enc =", and "lam_trans" can be omitted. For the last two,

   147    this is a secret feature. *)

   148 fun normalize_raw_param ctxt =

   149   unalias_raw_param

   150   #> (fn (name, value) =>

   151          if is_known_raw_param name then

   152            (name, value)

   153          else if is_prover_list ctxt name andalso null value then

   154            ("provers", [name])

   155          else if can (type_enc_from_string Strict) name andalso null value then

   156            ("type_enc", [name])

   157          else if can (trans_lams_from_string ctxt any_type_enc) name andalso

   158                  null value then

   159            ("lam_trans", [name])

   160          else

   161            error ("Unknown parameter: " ^ quote name ^ "."))

   164 (* Ensures that type encodings such as "mono_simple?" and "poly_guards!!" are

   165    read correctly. *)

   166 val implode_param = strip_spaces_except_between_idents o space_implode " "

   168 structure Data = Theory_Data

   169 (

   170   type T = raw_param list

   171   val empty = default_default_params |> map (apsnd single)

   172   val extend = I

   173   fun merge data : T = AList.merge (op =) (K true) data

   174 )

   176 fun remotify_prover_if_supported_and_not_already_remote ctxt name =

   177   if String.isPrefix remote_prefix name then

   178     SOME name

   179   else

   180     let val remote_name = remote_prefix ^ name in

   181       if is_prover_supported ctxt remote_name then SOME remote_name else NONE

   182     end

   184 fun remotify_prover_if_not_installed ctxt name =

   185   if is_prover_supported ctxt name andalso is_prover_installed ctxt name then

   186     SOME name

   187   else

   188     remotify_prover_if_supported_and_not_already_remote ctxt name

   190 fun avoid_too_many_threads _ _ [] = []

   191   | avoid_too_many_threads _ (0, 0) _ = []

   192   | avoid_too_many_threads ctxt (0, max_remote) provers =

   193     provers

   194     |> map_filter (remotify_prover_if_supported_and_not_already_remote ctxt)

   195     |> take max_remote

   196   | avoid_too_many_threads _ (max_local, 0) provers =

   197     provers

   198     |> filter_out (String.isPrefix remote_prefix)

   199     |> take max_local

   200   | avoid_too_many_threads ctxt max_local_and_remote (prover :: provers) =

   201     let

   202       val max_local_and_remote =

   203         max_local_and_remote

   204         |> (if String.isPrefix remote_prefix prover then apsnd else apfst)

   205               (Integer.add ~1)

   206     in prover :: avoid_too_many_threads ctxt max_local_and_remote provers end

   208 val max_default_remote_threads = 4

   210 (* The first ATP of the list is used by Auto Sledgehammer. Because of the low

   211    timeout, it makes sense to put SPASS first. *)

   212 fun default_provers_param_value ctxt =

   213   [spassN, spass_newN, eN, vampireN, SMT_Solver.solver_name_of ctxt, e_sineN,

   214    waldmeisterN]

   215   |> map_filter (remotify_prover_if_not_installed ctxt)

   216   |> avoid_too_many_threads ctxt (Multithreading.max_threads_value (),

   217                                   max_default_remote_threads)

   218   |> implode_param

   220 fun set_default_raw_param param thy =

   221   let val ctxt = Proof_Context.init_global thy in

   222     thy |> Data.map (AList.update (op =) (normalize_raw_param ctxt param))

   223   end

   224 fun default_raw_params ctxt =

   225   let val thy = Proof_Context.theory_of ctxt in

   226     Data.get thy

   227     |> fold (AList.default (op =))

   228             [("provers", [case !provers of

   229                             "" => default_provers_param_value ctxt

   230                           | s => s]),

   231              ("timeout", let val timeout = !timeout in

   232                            [if timeout <= 0 then "none"

   233                             else string_of_int timeout]

   234                          end)]

   235   end

   237 val infinity_time_in_secs = 60 * 60 * 24 * 365

   238 val the_timeout = the_default (Time.fromSeconds infinity_time_in_secs)

   240 fun extract_params mode default_params override_params =

   241   let

   242     val raw_params = rev override_params @ rev default_params

   243     val lookup = Option.map implode_param o AList.lookup (op =) raw_params

   244     val lookup_string = the_default "" o lookup

   245     fun general_lookup_bool option default_value name =

   246       case lookup name of

   247         SOME s => parse_bool_option option name s

   248       | NONE => default_value

   249     val lookup_bool = the o general_lookup_bool false (SOME false)

   250     fun lookup_time name =

   251       case lookup name of

   252         SOME s => parse_time_option name s

   253       | NONE => NONE

   254     fun lookup_int name =

   255       case lookup name of

   256         NONE => 0

   257       | SOME s => case Int.fromString s of

   258                     SOME n => n

   259                   | NONE => error ("Parameter " ^ quote name ^

   260                                    " must be assigned an integer value.")

   261     fun lookup_real_pair name =

   262       case lookup name of

   263         NONE => (0.0, 0.0)

   264       | SOME s => case s |> space_explode " " |> map Real.fromString of

   265                     [SOME r1, SOME r2] => (r1, r2)

   266                   | _ => error ("Parameter " ^ quote name ^

   267                                 "must be assigned a pair of floating-point \

   268                                 \values (e.g., \"0.6 0.95\")")

   269     fun lookup_option lookup' name =

   270       case lookup name of

   271         SOME "smart" => NONE

   272       | _ => SOME (lookup' name)

   273     val debug = mode <> Auto_Try andalso lookup_bool "debug"

   274     val verbose = debug orelse (mode <> Auto_Try andalso lookup_bool "verbose")

   275     val overlord = lookup_bool "overlord"

   276     val blocking =

   277       Isabelle_Process.is_active () orelse mode <> Normal orelse debug orelse

   278       lookup_bool "blocking"

   279     val provers = lookup_string "provers" |> space_explode " "

   280                   |> mode = Auto_Try ? single o hd

   281     val type_enc =

   282       if mode = Auto_Try then

   283         NONE

   284       else case lookup_string "type_enc" of

   285         "smart" => NONE

   286       | s => (type_enc_from_string Strict s; SOME s)

   287     val strict = mode = Auto_Try orelse lookup_bool "strict"

   288     val lam_trans = lookup_option lookup_string "lam_trans"

   289     val relevance_thresholds = lookup_real_pair "relevance_thresholds"

   290     val max_relevant = lookup_option lookup_int "max_relevant"

   291     val max_mono_iters = lookup_int "max_mono_iters"

   292     val max_new_mono_instances = lookup_int "max_new_mono_instances"

   293     val isar_proof = lookup_bool "isar_proof"

   294     val isar_shrink_factor = Int.max (1, lookup_int "isar_shrink_factor")

   295     val slice = mode <> Auto_Try andalso lookup_bool "slice"

   296     val minimize =

   297       if mode = Auto_Try then NONE else lookup_option lookup_bool "minimize"

   298     val timeout =

   299       (if mode = Auto_Try then NONE else lookup_time "timeout") |> the_timeout

   300     val preplay_timeout =

   301       if mode = Auto_Try then Time.zeroTime

   302       else lookup_time "preplay_timeout" |> the_timeout

   303     val expect = lookup_string "expect"

   304   in

   305     {debug = debug, verbose = verbose, overlord = overlord, blocking = blocking,

   306      provers = provers, type_enc = type_enc, strict = strict,

   307      lam_trans = lam_trans, relevance_thresholds = relevance_thresholds,

   308      max_relevant = max_relevant, max_mono_iters = max_mono_iters,

   309      max_new_mono_instances = max_new_mono_instances,  isar_proof = isar_proof,

   310      isar_shrink_factor = isar_shrink_factor, slice = slice,

   311      minimize = minimize, timeout = timeout, preplay_timeout = preplay_timeout,

   312      expect = expect}

   313   end

   315 fun get_params mode = extract_params mode o default_raw_params

   316 fun default_params thy = get_params Normal thy o map (apsnd single)

   318 (* Sledgehammer the given subgoal *)

   320 val default_minimize_prover = metisN

   322 fun is_raw_param_relevant_for_minimize (name, _) =

   323   member (op =) params_for_minimize name

   324 fun string_for_raw_param (key, values) =

   325   key ^ (case implode_param values of "" => "" | value => " = " ^ value)

   327 fun minimize_command override_params i more_override_params prover_name

   328                      fact_names =

   329   let

   330     val params =

   331       (override_params

   332        |> filter_out (AList.defined (op =) more_override_params o fst)) @

   333       more_override_params

   334       |> filter is_raw_param_relevant_for_minimize

   335       |> map string_for_raw_param

   336       |> (if prover_name = default_minimize_prover then I else cons prover_name)

   337       |> space_implode ", "

   338   in

   339     sledgehammerN ^ " " ^ minN ^

   340     (if params = "" then "" else enclose " [" "]" params) ^

   341     " (" ^ space_implode " " fact_names ^ ")" ^

   342     (if i = 1 then "" else " " ^ string_of_int i)

   343   end

   345 fun hammer_away override_params subcommand opt_i relevance_override state =

   346   let

   347     val ctxt = Proof.context_of state

   348     val override_params = override_params |> map (normalize_raw_param ctxt)

   349   in

   350     if subcommand = runN then

   351       let val i = the_default 1 opt_i in

   352         run_sledgehammer (get_params Normal ctxt override_params) Normal i

   353                          relevance_override (minimize_command override_params i)

   354                          state

   355         |> K ()

   356       end

   357     else if subcommand = minN then

   358       run_minimize (get_params Minimize ctxt

   359                                (("provers", [default_minimize_prover]) ::

   360                                 override_params))

   361                    (the_default 1 opt_i) (#add relevance_override) state

   362     else if subcommand = messagesN then

   363       messages opt_i

   364     else if subcommand = supported_proversN then

   365       supported_provers ctxt

   366     else if subcommand = running_proversN then

   367       running_provers ()

   368     else if subcommand = kill_proversN then

   369       kill_provers ()

   370     else if subcommand = refresh_tptpN then

   371       refresh_systems_on_tptp ()

   372     else

   373       error ("Unknown subcommand: " ^ quote subcommand ^ ".")

   374   end

   376 fun sledgehammer_trans (((subcommand, params), relevance_override), opt_i) =

   377   Toplevel.keep (hammer_away params subcommand opt_i relevance_override

   378                  o Toplevel.proof_of)

   380 fun string_for_raw_param (name, value) = name ^ " = " ^ implode_param value

   382 fun sledgehammer_params_trans params =

   383   Toplevel.theory

   384       (fold set_default_raw_param params

   385        #> tap (fn thy =>

   386                   let val ctxt = Proof_Context.init_global thy in

   387                     writeln ("Default parameters for Sledgehammer:\n" ^

   388                              (case default_raw_params ctxt |> rev of

   389                                 [] => "none"

   390                               | params =>

   391                                 params |> map string_for_raw_param

   392                                        |> sort_strings |> cat_lines))

   393                   end))

   395 val parse_query_bang = Parse.$$$ "?" || Parse.$$$ "!" || Parse.$$$ "!!"

   396 val parse_key =

   397   Scan.repeat1 (Parse.typ_group || parse_query_bang) >> implode_param

   398 val parse_value =

   399   Scan.repeat1 (Parse.xname || Parse.float_number || parse_query_bang)

   400 val parse_param = parse_key -- Scan.optional (Parse.$$$ "=" |-- parse_value) []

   401 val parse_params = Scan.optional (Args.bracks (Parse.list parse_param)) []

   402 val parse_fact_refs =

   403   Scan.repeat1 (Scan.unless (Parse.name -- Args.colon) Parse_Spec.xthm)

   404 val parse_relevance_chunk =

   405   (Args.add |-- Args.colon |-- parse_fact_refs >> add_relevance_override)

   406   || (Args.del |-- Args.colon |-- parse_fact_refs >> del_relevance_override)

   407   || (parse_fact_refs >> only_relevance_override)

   408 val parse_relevance_override =

   409   Scan.optional (Args.parens (Scan.repeat parse_relevance_chunk

   410                               >> merge_relevance_overrides))

   411                 no_relevance_override

   412 val parse_sledgehammer_command =

   413   (Scan.optional Parse.short_ident runN -- parse_params

   414    -- parse_relevance_override -- Scan.option Parse.nat) #>> sledgehammer_trans

   415 val parse_sledgehammer_params_command =

   416   parse_params #>> sledgehammer_params_trans

   418 val _ =

   419   Outer_Syntax.improper_command sledgehammerN

   420       "search for first-order proof using automatic theorem provers" Keyword.diag

   421       parse_sledgehammer_command

   422 val _ =

   423   Outer_Syntax.command sledgehammer_paramsN

   424       "set and display the default parameters for Sledgehammer" Keyword.thy_decl

   425       parse_sledgehammer_params_command

   427 fun try_sledgehammer auto state =

   428   let

   429     val ctxt = Proof.context_of state

   430     val mode = if auto then Auto_Try else Try

   431     val i = 1

   432   in

   433     run_sledgehammer (get_params mode ctxt []) mode i no_relevance_override

   434                      (minimize_command [] i) state

   435   end

   437 val setup = Try.register_tool (sledgehammerN, (40, auto, try_sledgehammer))

   439 end;

author	blanchet
	Thu, 02 Feb 2012 12:42:05 +0100
changeset 47226	caf27e675dd1
parent 47148	0b8b73b49848
child 47237	d4754183ccce
permissions	-rw-r--r--