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 auto : bool Unsynchronized.ref

    12   val provers : string Unsynchronized.ref

    13   val timeout : int Unsynchronized.ref

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

    15   val setup : theory -> theory

    16 end;

    18 structure Sledgehammer_Isar : SLEDGEHAMMER_ISAR =

    19 struct

    21 open ATP_Util

    22 open ATP_Systems

    23 open ATP_Problem_Generate

    24 open ATP_Proof_Reconstruct

    25 open Sledgehammer_Util

    26 open Sledgehammer_Fact

    27 open Sledgehammer_Provers

    28 open Sledgehammer_Minimize

    29 open Sledgehammer_Filter_MaSh

    30 open Sledgehammer_Run

    32 val runN = "run"

    33 val minN = "min"

    34 val messagesN = "messages"

    35 val supported_proversN = "supported_provers"

    36 val running_proversN = "running_provers"

    37 val kill_proversN = "kill_provers"

    38 val refresh_tptpN = "refresh_tptp"

    39 val mash_resetN = "mash_reset"

    40 val mash_learnN = "mash_learn"

    42 (* experimental *)

    43 val mash_RESET_N = "mash_RESET"

    44 val mash_ADD_N = "mash_ADD"

    45 val mash_DEL_N = "mash_DEL"

    46 val mash_SUGGEST_N = "mash_SUGGEST"

    48 val auto = Unsynchronized.ref false

    50 val _ =

    51   ProofGeneralPgip.add_preference Preferences.category_tracing

    52       (Preferences.bool_pref auto "auto-sledgehammer"

    53            "Run Sledgehammer automatically.")

    55 (** Sledgehammer commands **)

    57 fun add_fact_override ns : fact_override = {add = ns, del = [], only = false}

    58 fun del_fact_override ns : fact_override = {add = [], del = ns, only = false}

    59 fun only_fact_override ns : fact_override = {add = ns, del = [], only = true}

    60 fun merge_fact_override_pairwise (r1 : fact_override) (r2 : fact_override) =

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

    62    only = #only r1 andalso #only r2}

    63 fun merge_fact_overrides rs =

    64   fold merge_fact_override_pairwise rs (only_fact_override [])

    66 (*** parameters ***)

    68 val provers = Unsynchronized.ref ""

    69 val timeout = Unsynchronized.ref 30

    71 val _ =

    72   ProofGeneralPgip.add_preference Preferences.category_proof

    73       (Preferences.string_pref provers

    74           "Sledgehammer: Provers"

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

    77 val _ =

    78   ProofGeneralPgip.add_preference Preferences.category_proof

    79       (Preferences.int_pref timeout

    80           "Sledgehammer: Time Limit"

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

    83 type raw_param = string * string list

    85 val default_default_params =

    86   [("debug", "false"),

    87    ("verbose", "false"),

    88    ("overlord", "false"),

    89    ("blocking", "false"),

    90    ("type_enc", "smart"),

    91    ("strict", "false"),

    92    ("lam_trans", "smart"),

    93    ("uncurried_aliases", "smart"),

    94    ("fact_thresholds", "0.45 0.85"),

    95    ("max_facts", "smart"),

    96    ("max_mono_iters", "smart"),

    97    ("max_new_mono_instances", "smart"),

    98    ("isar_proof", "false"),

    99    ("isar_shrink_factor", "1"),

   100    ("slice", "true"),

   101    ("minimize", "smart"),

   102    ("preplay_timeout", "3")]

   104 val alias_params =

   105   [("prover", ("provers", [])), (* legacy *)

   106    ("max_relevant", ("max_facts", [])), (* legacy *)

   107    ("dont_preplay", ("preplay_timeout", ["0"]))]

   108 val negated_alias_params =

   109   [("no_debug", "debug"),

   110    ("quiet", "verbose"),

   111    ("no_overlord", "overlord"),

   112    ("non_blocking", "blocking"),

   113    ("non_strict", "strict"),

   114    ("no_uncurried_aliases", "uncurried_aliases"),

   115    ("no_isar_proof", "isar_proof"),

   116    ("dont_slice", "slice"),

   117    ("dont_minimize", "minimize")]

   119 val params_for_minimize =

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

   121    "uncurried_aliases", "max_mono_iters", "max_new_mono_instances",

   122    "isar_proof", "isar_shrink_factor", "timeout", "preplay_timeout"]

   124 val property_dependent_params = ["provers", "timeout"]

   126 fun is_known_raw_param s =

   127   AList.defined (op =) default_default_params s orelse

   128   AList.defined (op =) alias_params s orelse

   129   AList.defined (op =) negated_alias_params s orelse

   130   member (op =) property_dependent_params s orelse s = "expect"

   132 fun is_prover_list ctxt s =

   133   case space_explode " " s of

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

   135   | _ => false

   137 fun unalias_raw_param (name, value) =

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

   139     SOME (name', []) => (name', value)

   140   | SOME (param' as (name', _)) =>

   141     if value <> ["false"] then

   142       param'

   143     else

   144       error ("Parameter " ^ quote name ^ " cannot be set to \"false\" \

   145              \(cf. " ^ quote name' ^ ").")

   146   | NONE =>

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

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

   149                               ["false"] => ["true"]

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

   151                             | [] => ["false"]

   152                             | _ => value)

   153     | NONE => (name, value)

   155 val any_type_enc = type_enc_from_string Strict "erased"

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

   158    this is a secret feature. *)

   159 fun normalize_raw_param ctxt =

   160   unalias_raw_param

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

   162          if is_known_raw_param name then

   163            (name, value)

   164          else if is_prover_list ctxt name andalso null value then

   165            ("provers", [name])

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

   167            ("type_enc", [name])

   168          else if can (trans_lams_from_string ctxt any_type_enc) name andalso

   169                  null value then

   170            ("lam_trans", [name])

   171          else

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

   175 (* Ensures that type encodings such as "mono_native?" and "poly_guards!!" are

   176    read correctly. *)

   177 val implode_param = strip_spaces_except_between_idents o space_implode " "

   179 structure Data = Theory_Data

   180 (

   181   type T = raw_param list

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

   183   val extend = I

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

   185 )

   187 fun remotify_prover_if_supported_and_not_already_remote ctxt name =

   188   if String.isPrefix remote_prefix name then

   189     SOME name

   190   else

   191     let val remote_name = remote_prefix ^ name in

   192       if is_prover_supported ctxt remote_name then SOME remote_name else NONE

   193     end

   195 fun remotify_prover_if_not_installed ctxt name =

   196   if is_prover_supported ctxt name andalso is_prover_installed ctxt name then

   197     SOME name

   198   else

   199     remotify_prover_if_supported_and_not_already_remote ctxt name

   201 fun avoid_too_many_threads _ _ [] = []

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

   203   | avoid_too_many_threads ctxt (0, max_remote) provers =

   204     provers

   205     |> map_filter (remotify_prover_if_supported_and_not_already_remote ctxt)

   206     |> take max_remote

   207   | avoid_too_many_threads _ (max_local, 0) provers =

   208     provers

   209     |> filter_out (String.isPrefix remote_prefix)

   210     |> take max_local

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

   212     let

   213       val max_local_and_remote =

   214         max_local_and_remote

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

   216               (Integer.add ~1)

   217     in prover :: avoid_too_many_threads ctxt max_local_and_remote provers end

   219 val max_default_remote_threads = 4

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

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

   223 fun default_provers_param_value ctxt =

   224   [spassN, eN, vampireN, SMT_Solver.solver_name_of ctxt, e_sineN,

   225    waldmeisterN]

   226   |> map_filter (remotify_prover_if_not_installed ctxt)

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

   228                                   max_default_remote_threads)

   229   |> implode_param

   231 fun set_default_raw_param param thy =

   232   let val ctxt = Proof_Context.init_global thy in

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

   234   end

   235 fun default_raw_params ctxt =

   236   let val thy = Proof_Context.theory_of ctxt in

   237     Data.get thy

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

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

   240                             "" => default_provers_param_value ctxt

   241                           | s => s]),

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

   243                            [if timeout <= 0 then "none"

   244                             else string_of_int timeout]

   245                          end)]

   246   end

   248 val infinity_time_in_secs = 60 * 60 * 24 * 365

   249 val the_timeout = the_default (Time.fromSeconds infinity_time_in_secs)

   251 fun extract_params mode default_params override_params =

   252   let

   253     val raw_params = rev override_params @ rev default_params

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

   255     val lookup_string = the_default "" o lookup

   256     fun general_lookup_bool option default_value name =

   257       case lookup name of

   258         SOME s => parse_bool_option option name s

   259       | NONE => default_value

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

   261     fun lookup_time name =

   262       case lookup name of

   263         SOME s => parse_time_option name s

   264       | NONE => NONE

   265     fun lookup_int name =

   266       case lookup name of

   267         NONE => 0

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

   269                     SOME n => n

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

   271                                    " must be assigned an integer value.")

   272     fun lookup_real_pair name =

   273       case lookup name of

   274         NONE => (0.0, 0.0)

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

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

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

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

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

   280     fun lookup_option lookup' name =

   281       case lookup name of

   282         SOME "smart" => NONE

   283       | _ => SOME (lookup' name)

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

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

   286     val overlord = lookup_bool "overlord"

   287     val blocking =

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

   289       lookup_bool "blocking"

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

   291                   |> mode = Auto_Try ? single o hd

   292     val type_enc =

   293       if mode = Auto_Try then

   294         NONE

   295       else case lookup_string "type_enc" of

   296         "smart" => NONE

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

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

   299     val lam_trans = lookup_option lookup_string "lam_trans"

   300     val uncurried_aliases = lookup_option lookup_bool "uncurried_aliases"

   301     val fact_thresholds = lookup_real_pair "fact_thresholds"

   302     val max_facts = lookup_option lookup_int "max_facts"

   303     val max_mono_iters = lookup_option lookup_int "max_mono_iters"

   304     val max_new_mono_instances =

   305       lookup_option lookup_int "max_new_mono_instances"

   306     val isar_proof = lookup_bool "isar_proof"

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

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

   309     val minimize =

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

   311     val timeout =

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

   313     val preplay_timeout =

   314       if mode = Auto_Try then Time.zeroTime

   315       else lookup_time "preplay_timeout" |> the_timeout

   316     val expect = lookup_string "expect"

   317   in

   318     {debug = debug, verbose = verbose, overlord = overlord, blocking = blocking,

   319      provers = provers, type_enc = type_enc, strict = strict,

   320      lam_trans = lam_trans, uncurried_aliases = uncurried_aliases,

   321      fact_thresholds = fact_thresholds, max_facts = max_facts,

   322      max_mono_iters = max_mono_iters,

   323      max_new_mono_instances = max_new_mono_instances,  isar_proof = isar_proof,

   324      isar_shrink_factor = isar_shrink_factor, slice = slice,

   325      minimize = minimize, timeout = timeout, preplay_timeout = preplay_timeout,

   326      expect = expect}

   327   end

   329 fun get_params mode = extract_params mode o default_raw_params

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

   332 (* Sledgehammer the given subgoal *)

   334 val default_minimize_prover = metisN

   336 fun is_raw_param_relevant_for_minimize (name, _) =

   337   member (op =) params_for_minimize name

   338 fun string_for_raw_param (key, values) =

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

   341 fun minimize_command override_params i more_override_params prover_name

   342                      fact_names =

   343   let

   344     val params =

   345       (override_params

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

   347       more_override_params

   348       |> filter is_raw_param_relevant_for_minimize

   349       |> map string_for_raw_param

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

   351       |> space_implode ", "

   352   in

   353     "sledgehammer" ^ " " ^ minN ^

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

   355     " (" ^ space_implode " " fact_names ^ ")" ^

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

   357   end

   359 fun hammer_away override_params subcommand opt_i fact_override state =

   360   let

   361     val ctxt = Proof.context_of state

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

   363   in

   364     if subcommand = runN then

   365       let val i = the_default 1 opt_i in

   366         run_sledgehammer (get_params Normal ctxt override_params) Normal i

   367                          fact_override (minimize_command override_params i)

   368                          state

   369         |> K ()

   370       end

   371     else if subcommand = minN then

   372       run_minimize (get_params Minimize ctxt

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

   374                                 override_params))

   375                    (the_default 1 opt_i) (#add fact_override) state

   376     else if subcommand = messagesN then

   377       messages opt_i

   378     else if subcommand = supported_proversN then

   379       supported_provers ctxt

   380     else if subcommand = running_proversN then

   381       running_provers ()

   382     else if subcommand = kill_proversN then

   383       kill_provers ()

   384     else if subcommand = refresh_tptpN then

   385       refresh_systems_on_tptp ()

   386     else if subcommand = mash_resetN then

   387       mash_reset ()

   388     else if subcommand = mash_learnN then

   389       () (* TODO: implement *)

   390     else if subcommand = mash_RESET_N then

   391       () (* TODO: implement *)

   392     else if subcommand = mash_ADD_N then

   393       () (* TODO: implement *)

   394     else if subcommand = mash_DEL_N then

   395       () (* TODO: implement *)

   396     else if subcommand = mash_SUGGEST_N then

   397       () (* TODO: implement *)

   398     else

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

   400   end

   402 fun sledgehammer_trans (((subcommand, params), fact_override), opt_i) =

   403   Toplevel.keep (hammer_away params subcommand opt_i fact_override

   404                  o Toplevel.proof_of)

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

   408 fun sledgehammer_params_trans params =

   409   Toplevel.theory

   410       (fold set_default_raw_param params

   411        #> tap (fn thy =>

   412                   let val ctxt = Proof_Context.init_global thy in

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

   414                              (case default_raw_params ctxt |> rev of

   415                                 [] => "none"

   416                               | params =>

   417                                 params |> map string_for_raw_param

   418                                        |> sort_strings |> cat_lines))

   419                   end))

   421 val parse_query_bang = @{keyword "?"} || @{keyword "!"} || @{keyword "!!"}

   422 val parse_key =

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

   424 val parse_value =

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

   426 val parse_param = parse_key -- Scan.optional (@{keyword "="} |-- parse_value) []

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

   428 val parse_fact_refs =

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

   430 val parse_fact_override_chunk =

   431   (Args.add |-- Args.colon |-- parse_fact_refs >> add_fact_override)

   432   || (Args.del |-- Args.colon |-- parse_fact_refs >> del_fact_override)

   433   || (parse_fact_refs >> only_fact_override)

   434 val parse_fact_override =

   435   Scan.optional (Args.parens (Scan.repeat parse_fact_override_chunk

   436                               >> merge_fact_overrides))

   437                 no_fact_override

   439 val _ =

   440   Outer_Syntax.improper_command @{command_spec "sledgehammer"}

   441     "search for first-order proof using automatic theorem provers"

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

   443       -- parse_fact_override -- Scan.option Parse.nat) #>> sledgehammer_trans)

   444 val _ =

   445   Outer_Syntax.command @{command_spec "sledgehammer_params"}

   446     "set and display the default parameters for Sledgehammer"

   447     (parse_params #>> sledgehammer_params_trans)

   449 fun try_sledgehammer auto state =

   450   let

   451     val ctxt = Proof.context_of state

   452     val mode = if auto then Auto_Try else Try

   453     val i = 1

   454   in

   455     run_sledgehammer (get_params mode ctxt []) mode i no_fact_override

   456                      (minimize_command [] i) state

   457   end

   459 val setup = Try.register_tool ("sledgehammer", (40, auto, try_sledgehammer))

   461 end;

author	blanchet
	Wed, 18 Jul 2012 08:44:03 +0200
changeset 49316	e5c5037a3104
parent 49308	914ca0827804
child 49317	6cf5e58f1185
permissions	-rw-r--r--