blanchet@36375: (*  Title:      HOL/Tools/Sledgehammer/sledgehammer_isar.ML
blanchet@35866:     Author:     Jasmin Blanchette, TU Muenchen
blanchet@35866: 
blanchet@35866: Adds "sledgehammer" and related commands to Isabelle/Isar's outer syntax.
blanchet@35866: *)
blanchet@35866: 
blanchet@35961: signature SLEDGEHAMMER_ISAR =
blanchet@35961: sig
blanchet@41335:   type params = Sledgehammer_Provers.params
blanchet@35961: 
blanchet@43861:   val sledgehammerN : string
blanchet@39564:   val auto : bool Unsynchronized.ref
blanchet@40240:   val provers : string Unsynchronized.ref
blanchet@39564:   val timeout : int Unsynchronized.ref
blanchet@40250:   val default_params : Proof.context -> (string * string) list -> params
blanchet@39564:   val setup : theory -> theory
blanchet@35961: end;
blanchet@35961: 
blanchet@35969: structure Sledgehammer_Isar : SLEDGEHAMMER_ISAR =
blanchet@35866: struct
blanchet@35866: 
blanchet@45652: open ATP_Util
blanchet@38262: open ATP_Systems
blanchet@43926: open ATP_Translate
blanchet@46390: open ATP_Reconstruct
blanchet@35969: open Sledgehammer_Util
blanchet@45319: open Sledgehammer_Filter
blanchet@41335: open Sledgehammer_Provers
blanchet@39232: open Sledgehammer_Minimize
blanchet@41335: open Sledgehammer_Run
blanchet@35866: 
blanchet@43861: val sledgehammerN = "sledgehammer"
blanchet@43861: val sledgehammer_paramsN = "sledgehammer_params"
blanchet@43861: 
blanchet@43861: val runN = "run"
blanchet@43861: val minN = "min"
blanchet@43861: val messagesN = "messages"
blanchet@43861: val supported_proversN = "supported_provers"
blanchet@43861: val running_proversN = "running_provers"
blanchet@43861: val kill_proversN = "kill_provers"
blanchet@43861: val refresh_tptpN = "refresh_tptp"
blanchet@43861: 
blanchet@39564: val auto = Unsynchronized.ref false
blanchet@39564: 
blanchet@39564: val _ =
blanchet@39564:   ProofGeneralPgip.add_preference Preferences.category_tracing
blanchet@39564:       (Preferences.bool_pref auto "auto-sledgehammer"
blanchet@39573:            "Run Sledgehammer automatically.")
blanchet@39564: 
blanchet@36394: (** Sledgehammer commands **)
blanchet@36394: 
blanchet@39564: fun add_relevance_override ns : relevance_override =
blanchet@35964:   {add = ns, del = [], only = false}
blanchet@39564: fun del_relevance_override ns : relevance_override =
blanchet@35964:   {add = [], del = ns, only = false}
blanchet@35964: fun only_relevance_override ns : relevance_override =
blanchet@35964:   {add = ns, del = [], only = true}
blanchet@36003: fun merge_relevance_override_pairwise (r1 : relevance_override)
blanchet@36003:                                       (r2 : relevance_override) =
blanchet@35964:   {add = #add r1 @ #add r2, del = #del r1 @ #del r2,
blanchet@36183:    only = #only r1 andalso #only r2}
blanchet@36188: fun merge_relevance_overrides rs =
blanchet@36188:   fold merge_relevance_override_pairwise rs (only_relevance_override [])
blanchet@35963: 
blanchet@36371: (*** parameters ***)
blanchet@36371: 
blanchet@40240: val provers = Unsynchronized.ref ""
blanchet@39581: val timeout = Unsynchronized.ref 30
blanchet@36371: 
blanchet@36371: val _ =
blanchet@36371:   ProofGeneralPgip.add_preference Preferences.category_proof
blanchet@40240:       (Preferences.string_pref provers
blanchet@40240:           "Sledgehammer: Provers"
blanchet@36371:           "Default automatic provers (separated by whitespace)")
blanchet@36371: 
blanchet@36371: val _ =
blanchet@36371:   ProofGeneralPgip.add_preference Preferences.category_proof
blanchet@36371:       (Preferences.int_pref timeout
blanchet@36373:           "Sledgehammer: Time Limit"
blanchet@36371:           "ATPs will be interrupted after this time (in seconds)")
blanchet@36371: 
blanchet@35961: type raw_param = string * string list
blanchet@35866: 
blanchet@35961: val default_default_params =
blanchet@41456:   [("debug", "false"),
blanchet@35961:    ("verbose", "false"),
blanchet@36141:    ("overlord", "false"),
blanchet@41456:    ("blocking", "false"),
blanchet@44493:    ("type_enc", "smart"),
blanchet@47129:    ("strict", "false"),
blanchet@46385:    ("lam_trans", "smart"),
blanchet@43051:    ("relevance_thresholds", "0.45 0.85"),
blanchet@43051:    ("max_relevant", "smart"),
blanchet@43654:    ("max_mono_iters", "3"),
blanchet@44218:    ("max_new_mono_instances", "200"),
blanchet@35961:    ("isar_proof", "false"),
blanchet@43314:    ("isar_shrink_factor", "1"),
blanchet@46577:    ("slice", "true"),
blanchet@46578:    ("minimize", "smart"),
blanchet@47125:    ("preplay_timeout", "3")]
blanchet@35866: 
blanchet@36138: val alias_params =
blanchet@44219:   [("prover", "provers")]
blanchet@36138: val negated_alias_params =
blanchet@41456:   [("no_debug", "debug"),
blanchet@35961:    ("quiet", "verbose"),
blanchet@36141:    ("no_overlord", "overlord"),
blanchet@41456:    ("non_blocking", "blocking"),
blanchet@47129:    ("non_strict", "strict"),
blanchet@43314:    ("no_isar_proof", "isar_proof"),
blanchet@46578:    ("dont_slice", "slice"),
blanchet@46578:    ("dont_minimize", "minimize")]
blanchet@35866: 
blanchet@36281: val params_for_minimize =
blanchet@47129:   ["debug", "verbose", "overlord", "type_enc", "strict", "lam_trans",
blanchet@46385:    "max_mono_iters", "max_new_mono_instances", "isar_proof",
blanchet@46385:    "isar_shrink_factor", "timeout", "preplay_timeout"]
blanchet@36281: 
blanchet@44431: val property_dependent_params = ["provers", "timeout"]
blanchet@35866: 
blanchet@35961: fun is_known_raw_param s =
blanchet@35961:   AList.defined (op =) default_default_params s orelse
blanchet@36138:   AList.defined (op =) alias_params s orelse
blanchet@36138:   AList.defined (op =) negated_alias_params s orelse
blanchet@39229:   member (op =) property_dependent_params s orelse s = "expect"
blanchet@35866: 
blanchet@41504: fun is_prover_list ctxt s =
blanchet@41504:   case space_explode " " s of
blanchet@42591:     ss as _ :: _ => forall (is_prover_supported ctxt) ss
blanchet@41504:   | _ => false
blanchet@41504: 
blanchet@36138: fun unalias_raw_param (name, value) =
blanchet@36138:   case AList.lookup (op =) alias_params name of
blanchet@36138:     SOME name' => (name', value)
blanchet@36138:   | NONE =>
blanchet@36138:     case AList.lookup (op =) negated_alias_params name of
blanchet@36138:       SOME name' => (name', case value of
blanchet@36138:                               ["false"] => ["true"]
blanchet@36138:                             | ["true"] => ["false"]
blanchet@36138:                             | [] => ["false"]
blanchet@36138:                             | _ => value)
blanchet@36138:     | NONE => (name, value)
blanchet@35961: 
blanchet@47129: val any_type_enc = type_enc_from_string Strict "erased"
blanchet@46385: 
blanchet@46385: (* "provers =", "type_enc =", and "lam_trans" can be omitted. For the last two,
blanchet@46385:    this is a secret feature. *)
blanchet@45591: fun normalize_raw_param ctxt =
blanchet@45591:   unalias_raw_param
blanchet@45591:   #> (fn (name, value) =>
blanchet@45591:          if is_known_raw_param name then
blanchet@45591:            (name, value)
blanchet@45591:          else if is_prover_list ctxt name andalso null value then
blanchet@45591:            ("provers", [name])
blanchet@47129:          else if can (type_enc_from_string Strict) name andalso null value then
blanchet@45591:            ("type_enc", [name])
blanchet@46385:          else if can (trans_lams_from_string ctxt any_type_enc) name andalso
blanchet@46385:                  null value then
blanchet@46385:            ("lam_trans", [name])
blanchet@45591:          else
blanchet@45591:            error ("Unknown parameter: " ^ quote name ^ "."))
blanchet@45591: 
blanchet@45591: 
blanchet@45653: (* Ensures that type encodings such as "mono_simple?" and "poly_guards!!" are
blanchet@45653:    read correctly. *)
blanchet@45652: val implode_param = strip_spaces_except_between_idents o space_implode " "
blanchet@43850: 
wenzelm@41720: structure Data = Theory_Data
wenzelm@41720: (
blanchet@35961:   type T = raw_param list
blanchet@35961:   val empty = default_default_params |> map (apsnd single)
blanchet@35961:   val extend = I
wenzelm@41720:   fun merge data : T = AList.merge (op =) (K true) data
wenzelm@41720: )
blanchet@35961: 
blanchet@42591: fun remotify_prover_if_supported_and_not_already_remote ctxt name =
blanchet@40253:   if String.isPrefix remote_prefix name then
blanchet@40253:     SOME name
blanchet@40253:   else
blanchet@40253:     let val remote_name = remote_prefix ^ name in
blanchet@42591:       if is_prover_supported ctxt remote_name then SOME remote_name else NONE
blanchet@40253:     end
blanchet@40253: 
blanchet@40253: fun remotify_prover_if_not_installed ctxt name =
blanchet@42591:   if is_prover_supported ctxt name andalso is_prover_installed ctxt name then
blanchet@41189:     SOME name
blanchet@41189:   else
blanchet@42591:     remotify_prover_if_supported_and_not_already_remote ctxt name
blanchet@40253: 
blanchet@43850: fun avoid_too_many_threads _ _ [] = []
blanchet@43850:   | avoid_too_many_threads _ (0, 0) _ = []
blanchet@43850:   | avoid_too_many_threads ctxt (0, max_remote) provers =
blanchet@43850:     provers
blanchet@43850:     |> map_filter (remotify_prover_if_supported_and_not_already_remote ctxt)
blanchet@43850:     |> take max_remote
blanchet@43850:   | avoid_too_many_threads _ (max_local, 0) provers =
blanchet@43850:     provers
blanchet@43850:     |> filter_out (String.isPrefix remote_prefix)
blanchet@43850:     |> take max_local
blanchet@43850:   | avoid_too_many_threads ctxt max_local_and_remote (prover :: provers) =
blanchet@43850:     let
blanchet@43850:       val max_local_and_remote =
blanchet@43850:         max_local_and_remote
blanchet@43850:         |> (if String.isPrefix remote_prefix prover then apsnd else apfst)
blanchet@43850:               (Integer.add ~1)
blanchet@43850:     in prover :: avoid_too_many_threads ctxt max_local_and_remote provers end
blanchet@40240: 
blanchet@43850: val max_default_remote_threads = 4
blanchet@43558: 
blanchet@40240: (* The first ATP of the list is used by Auto Sledgehammer. Because of the low
blanchet@40240:    timeout, it makes sense to put SPASS first. *)
blanchet@40250: fun default_provers_param_value ctxt =
blanchet@45929:   [spassN, eN, vampireN, SMT_Solver.solver_name_of ctxt, e_sineN, waldmeisterN]
blanchet@41189:   |> map_filter (remotify_prover_if_not_installed ctxt)
blanchet@43850:   |> avoid_too_many_threads ctxt (Multithreading.max_threads_value (),
blanchet@43850:                                   max_default_remote_threads)
blanchet@43647:   |> implode_param
blanchet@40240: 
blanchet@45591: fun set_default_raw_param param thy =
blanchet@45591:   let val ctxt = Proof_Context.init_global thy in
blanchet@45591:     thy |> Data.map (AList.update (op =) (normalize_raw_param ctxt param))
blanchet@45591:   end
blanchet@40250: fun default_raw_params ctxt =
wenzelm@43232:   let val thy = Proof_Context.theory_of ctxt in
blanchet@40250:     Data.get thy
blanchet@40250:     |> fold (AList.default (op =))
blanchet@40250:             [("provers", [case !provers of
blanchet@40250:                             "" => default_provers_param_value ctxt
blanchet@40250:                           | s => s]),
blanchet@40250:              ("timeout", let val timeout = !timeout in
blanchet@40250:                            [if timeout <= 0 then "none"
blanchet@40582:                             else string_of_int timeout]
blanchet@40250:                          end)]
blanchet@40250:   end
blanchet@35961: 
blanchet@35961: val infinity_time_in_secs = 60 * 60 * 24 * 365
blanchet@35961: val the_timeout = the_default (Time.fromSeconds infinity_time_in_secs)
blanchet@35961: 
blanchet@43862: fun extract_params mode default_params override_params =
blanchet@35961:   let
blanchet@35961:     val raw_params = rev override_params @ rev default_params
blanchet@43647:     val lookup = Option.map implode_param o AList.lookup (op =) raw_params
blanchet@35961:     val lookup_string = the_default "" o lookup
blanchet@35961:     fun general_lookup_bool option default_value name =
blanchet@35961:       case lookup name of
blanchet@35968:         SOME s => parse_bool_option option name s
blanchet@35961:       | NONE => default_value
blanchet@35961:     val lookup_bool = the o general_lookup_bool false (SOME false)
blanchet@35961:     fun lookup_time name =
blanchet@39564:       case lookup name of
blanchet@39564:         SOME s => parse_time_option name s
blanchet@39564:       | NONE => NONE
blanchet@35964:     fun lookup_int name =
blanchet@35961:       case lookup name of
blanchet@35964:         NONE => 0
blanchet@35964:       | SOME s => case Int.fromString s of
blanchet@35964:                     SOME n => n
blanchet@35964:                   | NONE => error ("Parameter " ^ quote name ^
blanchet@35964:                                    " must be assigned an integer value.")
blanchet@40584:     fun lookup_real_pair name =
blanchet@38984:       case lookup name of
blanchet@40584:         NONE => (0.0, 0.0)
blanchet@40584:       | SOME s => case s |> space_explode " " |> map Real.fromString of
blanchet@40584:                     [SOME r1, SOME r2] => (r1, r2)
blanchet@38984:                   | _ => error ("Parameter " ^ quote name ^
blanchet@40584:                                 "must be assigned a pair of floating-point \
blanchet@40584:                                 \values (e.g., \"0.6 0.95\")")
blanchet@43905:     fun lookup_option lookup' name =
blanchet@38812:       case lookup name of
blanchet@38812:         SOME "smart" => NONE
blanchet@43905:       | _ => SOME (lookup' name)
blanchet@43862:     val debug = mode <> Auto_Try andalso lookup_bool "debug"
blanchet@43862:     val verbose = debug orelse (mode <> Auto_Try andalso lookup_bool "verbose")
blanchet@36141:     val overlord = lookup_bool "overlord"
blanchet@43836:     val blocking =
blanchet@43862:       Isabelle_Process.is_active () orelse mode <> Normal orelse debug orelse
blanchet@43836:       lookup_bool "blocking"
blanchet@40240:     val provers = lookup_string "provers" |> space_explode " "
blanchet@43862:                   |> mode = Auto_Try ? single o hd
blanchet@44493:     val type_enc =
blanchet@43862:       if mode = Auto_Try then
blanchet@44431:         NONE
blanchet@44493:       else case lookup_string "type_enc" of
blanchet@44431:         "smart" => NONE
blanchet@47129:       | s => (type_enc_from_string Strict s; SOME s)
blanchet@47129:     val strict = mode = Auto_Try orelse lookup_bool "strict"
blanchet@46391:     val lam_trans = lookup_option lookup_string "lam_trans"
blanchet@43051:     val relevance_thresholds = lookup_real_pair "relevance_thresholds"
blanchet@43905:     val max_relevant = lookup_option lookup_int "max_relevant"
blanchet@43589:     val max_mono_iters = lookup_int "max_mono_iters"
blanchet@43605:     val max_new_mono_instances = lookup_int "max_new_mono_instances"
blanchet@35961:     val isar_proof = lookup_bool "isar_proof"
blanchet@36916:     val isar_shrink_factor = Int.max (1, lookup_int "isar_shrink_factor")
blanchet@46577:     val slice = mode <> Auto_Try andalso lookup_bool "slice"
blanchet@46578:     val minimize =
blanchet@46578:       if mode = Auto_Try then NONE else lookup_option lookup_bool "minimize"
blanchet@43862:     val timeout =
blanchet@43862:       (if mode = Auto_Try then NONE else lookup_time "timeout") |> the_timeout
blanchet@43856:     val preplay_timeout =
blanchet@43862:       if mode = Auto_Try then Time.zeroTime
blanchet@43856:       else lookup_time "preplay_timeout" |> the_timeout
blanchet@39229:     val expect = lookup_string "expect"
blanchet@35961:   in
blanchet@41456:     {debug = debug, verbose = verbose, overlord = overlord, blocking = blocking,
blanchet@47129:      provers = provers, type_enc = type_enc, strict = strict,
blanchet@46385:      lam_trans = lam_trans, relevance_thresholds = relevance_thresholds,
blanchet@43589:      max_relevant = max_relevant, max_mono_iters = max_mono_iters,
blanchet@46385:      max_new_mono_instances = max_new_mono_instances,  isar_proof = isar_proof,
blanchet@46578:      isar_shrink_factor = isar_shrink_factor, slice = slice,
blanchet@46578:      minimize = minimize, timeout = timeout, preplay_timeout = preplay_timeout,
blanchet@46578:      expect = expect}
blanchet@35961:   end
blanchet@35961: 
blanchet@45591: fun get_params mode = extract_params mode o default_raw_params
blanchet@43862: fun default_params thy = get_params Normal thy o map (apsnd single)
blanchet@35866: 
blanchet@36373: (* Sledgehammer the given subgoal *)
blanchet@36373: 
blanchet@46390: val default_minimize_prover = metisN
blanchet@43892: 
blanchet@45591: fun is_raw_param_relevant_for_minimize (name, _) =
blanchet@45591:   member (op =) params_for_minimize name
blanchet@36281: fun string_for_raw_param (key, values) =
blanchet@43647:   key ^ (case implode_param values of "" => "" | value => " = " ^ value)
blanchet@36281: 
blanchet@46391: fun minimize_command override_params i more_override_params prover_name
blanchet@46391:                      fact_names =
blanchet@43898:   let
blanchet@43898:     val params =
blanchet@46391:       (override_params
blanchet@46391:        |> filter_out (AList.defined (op =) more_override_params o fst)) @
blanchet@46391:       more_override_params
blanchet@43898:       |> filter is_raw_param_relevant_for_minimize
blanchet@43898:       |> map string_for_raw_param
blanchet@43898:       |> (if prover_name = default_minimize_prover then I else cons prover_name)
blanchet@43898:       |> space_implode ", "
blanchet@43898:   in
blanchet@43898:     sledgehammerN ^ " " ^ minN ^
blanchet@43898:     (if params = "" then "" else enclose " [" "]" params) ^
blanchet@43898:     " (" ^ space_implode " " fact_names ^ ")" ^
blanchet@43898:     (if i = 1 then "" else " " ^ string_of_int i)
blanchet@43898:   end
blanchet@36281: 
blanchet@35964: fun hammer_away override_params subcommand opt_i relevance_override state =
blanchet@35961:   let
blanchet@40250:     val ctxt = Proof.context_of state
blanchet@45591:     val override_params = override_params |> map (normalize_raw_param ctxt)
blanchet@35963:   in
blanchet@35963:     if subcommand = runN then
blanchet@36281:       let val i = the_default 1 opt_i in
blanchet@43862:         run_sledgehammer (get_params Normal ctxt override_params) Normal i
blanchet@39564:                          relevance_override (minimize_command override_params i)
blanchet@39564:                          state
blanchet@39564:         |> K ()
blanchet@36281:       end
blanchet@43849:     else if subcommand = minN then
blanchet@43892:       run_minimize (get_params Minimize ctxt
blanchet@43892:                                (("provers", [default_minimize_prover]) ::
blanchet@43892:                                 override_params))
blanchet@43862:                    (the_default 1 opt_i) (#add relevance_override) state
blanchet@35963:     else if subcommand = messagesN then
blanchet@35963:       messages opt_i
blanchet@42591:     else if subcommand = supported_proversN then
blanchet@42591:       supported_provers ctxt
blanchet@40240:     else if subcommand = running_proversN then
blanchet@40240:       running_provers ()
blanchet@40240:     else if subcommand = kill_proversN then
blanchet@40240:       kill_provers ()
blanchet@35963:     else if subcommand = refresh_tptpN then
blanchet@35963:       refresh_systems_on_tptp ()
blanchet@35963:     else
blanchet@35963:       error ("Unknown subcommand: " ^ quote subcommand ^ ".")
blanchet@35963:   end
blanchet@35961: 
blanchet@35964: fun sledgehammer_trans (((subcommand, params), relevance_override), opt_i) =
blanchet@35964:   Toplevel.keep (hammer_away params subcommand opt_i relevance_override
blanchet@35964:                  o Toplevel.proof_of)
blanchet@35961: 
blanchet@43647: fun string_for_raw_param (name, value) = name ^ " = " ^ implode_param value
blanchet@35961: 
blanchet@35963: fun sledgehammer_params_trans params =
blanchet@35961:   Toplevel.theory
blanchet@35963:       (fold set_default_raw_param params
blanchet@39564:        #> tap (fn thy =>
wenzelm@43232:                   let val ctxt = Proof_Context.init_global thy in
blanchet@40250:                     writeln ("Default parameters for Sledgehammer:\n" ^
blanchet@40250:                              (case default_raw_params ctxt |> rev of
blanchet@40250:                                 [] => "none"
blanchet@40250:                               | params =>
blanchet@45591:                                 params |> map string_for_raw_param
blanchet@41504:                                        |> sort_strings |> cat_lines))
blanchet@40250:                   end))
blanchet@35961: 
blanchet@45639: val parse_query_bang = Parse.$$$ "?" || Parse.$$$ "!" || Parse.$$$ "!!"
blanchet@43647: val parse_key =
blanchet@45639:   Scan.repeat1 (Parse.typ_group || parse_query_bang) >> implode_param
blanchet@43452: val parse_value =
blanchet@45639:   Scan.repeat1 (Parse.xname || Parse.float_number || parse_query_bang)
wenzelm@36970: val parse_param = parse_key -- Scan.optional (Parse.$$$ "=" |-- parse_value) []
wenzelm@36970: val parse_params = Scan.optional (Args.bracks (Parse.list parse_param)) []
blanchet@35963: val parse_fact_refs =
blanchet@39240:   Scan.repeat1 (Scan.unless (Parse.name -- Args.colon) Parse_Spec.xthm)
blanchet@35964: val parse_relevance_chunk =
blanchet@39564:   (Args.add |-- Args.colon |-- parse_fact_refs >> add_relevance_override)
blanchet@39564:   || (Args.del |-- Args.colon |-- parse_fact_refs >> del_relevance_override)
blanchet@36188:   || (parse_fact_refs >> only_relevance_override)
blanchet@35964: val parse_relevance_override =
blanchet@36188:   Scan.optional (Args.parens (Scan.repeat parse_relevance_chunk
blanchet@36188:                               >> merge_relevance_overrides))
blanchet@39564:                 no_relevance_override
blanchet@35961: val parse_sledgehammer_command =
blanchet@37374:   (Scan.optional Parse.short_ident runN -- parse_params
blanchet@37374:    -- parse_relevance_override -- Scan.option Parse.nat) #>> sledgehammer_trans
blanchet@35961: val parse_sledgehammer_params_command =
blanchet@35961:   parse_params #>> sledgehammer_params_trans
blanchet@35961: 
blanchet@35961: val _ =
wenzelm@36970:   Outer_Syntax.improper_command sledgehammerN
wenzelm@36970:       "search for first-order proof using automatic theorem provers" Keyword.diag
blanchet@36394:       parse_sledgehammer_command
blanchet@35961: val _ =
wenzelm@36970:   Outer_Syntax.command sledgehammer_paramsN
wenzelm@36970:       "set and display the default parameters for Sledgehammer" Keyword.thy_decl
blanchet@36394:       parse_sledgehammer_params_command
blanchet@36394: 
blanchet@43861: fun try_sledgehammer auto state =
blanchet@43861:   let
blanchet@43861:     val ctxt = Proof.context_of state
blanchet@43862:     val mode = if auto then Auto_Try else Try
blanchet@43861:     val i = 1
blanchet@43861:   in
blanchet@43862:     run_sledgehammer (get_params mode ctxt []) mode i no_relevance_override
blanchet@43861:                      (minimize_command [] i) state
blanchet@41175:   end
blanchet@39564: 
blanchet@43865: val setup = Try.register_tool (sledgehammerN, (40, auto, try_sledgehammer))
blanchet@39564: 
blanchet@35866: end;