src/HOL/Tools/Sledgehammer/sledgehammer_isar.ML
author wenzelm
Mon May 17 23:54:15 2010 +0200 (2010-05-17 ago)
changeset 36960 01594f816e3a
parent 36924 ff01d3ae9ad4
child 37171 fc1e20373e6a
permissions -rw-r--r--
prefer structure Keyword, Parse, Parse_Spec, Outer_Syntax;
eliminated old-style structure aliases K = Keyword, P = Parse;
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(*  Title:      HOL/Tools/Sledgehammer/sledgehammer_isar.ML
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    Author:     Jasmin Blanchette, TU Muenchen
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Adds "sledgehammer" and related commands to Isabelle/Isar's outer syntax.
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*)
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signature SLEDGEHAMMER_ISAR =
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sig
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  type params = ATP_Manager.params
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  val atps: string Unsynchronized.ref
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  val timeout: int Unsynchronized.ref
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  val full_types: bool Unsynchronized.ref
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  val default_params : theory -> (string * string) list -> params
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  val setup: theory -> theory
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end;
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structure Sledgehammer_Isar : SLEDGEHAMMER_ISAR =
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struct
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open Sledgehammer_Util
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open Sledgehammer_Fact_Preprocessor
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open ATP_Manager
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open ATP_Systems
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open Sledgehammer_Fact_Minimizer
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(** Proof method used in Isar proofs **)
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val neg_clausify_setup =
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  Method.setup @{binding neg_clausify}
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               (Scan.succeed (SIMPLE_METHOD' o neg_clausify_tac))
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               "conversion of goal to negated conjecture clauses"
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(** Attribute for converting a theorem into clauses **)
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val parse_clausify_attribute : attribute context_parser =
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  Scan.lift Parse.nat
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  >> (fn i => Thm.rule_attribute (fn context => fn th =>
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                  let val thy = Context.theory_of context in
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                    Meson.make_meta_clause (nth (cnf_axiom thy th) i)
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                  end))
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val clausify_setup =
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  Attrib.setup @{binding clausify} parse_clausify_attribute
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               "conversion of theorem to clauses"
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(** Sledgehammer commands **)
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fun add_to_relevance_override ns : relevance_override =
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  {add = ns, del = [], only = false}
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fun del_from_relevance_override ns : relevance_override =
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  {add = [], del = ns, only = false}
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fun only_relevance_override ns : relevance_override =
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  {add = ns, del = [], only = true}
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val no_relevance_override = add_to_relevance_override []
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fun merge_relevance_override_pairwise (r1 : relevance_override)
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                                      (r2 : relevance_override) =
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  {add = #add r1 @ #add r2, del = #del r1 @ #del r2,
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   only = #only r1 andalso #only r2}
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fun merge_relevance_overrides rs =
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  fold merge_relevance_override_pairwise rs (only_relevance_override [])
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(*** parameters ***)
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val atps = Unsynchronized.ref ""
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val timeout = Unsynchronized.ref 60
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val full_types = Unsynchronized.ref false
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val _ =
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  ProofGeneralPgip.add_preference Preferences.category_proof
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      (Preferences.string_pref atps
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          "Sledgehammer: ATPs"
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          "Default automatic provers (separated by whitespace)")
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val _ =
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  ProofGeneralPgip.add_preference Preferences.category_proof
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      (Preferences.int_pref timeout
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          "Sledgehammer: Time Limit"
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          "ATPs will be interrupted after this time (in seconds)")
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val _ =
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  ProofGeneralPgip.add_preference Preferences.category_proof
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      (Preferences.bool_pref full_types
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          "Sledgehammer: Full Types" "ATPs will use full type information")
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type raw_param = string * string list
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val default_default_params =
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  [("debug", "false"),
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   ("verbose", "false"),
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   ("overlord", "false"),
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   ("explicit_apply", "false"),
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   ("respect_no_atp", "true"),
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   ("relevance_threshold", "50"),
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   ("relevance_convergence", "320"),
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   ("theory_relevant", "smart"),
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   ("defs_relevant", "false"),
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   ("isar_proof", "false"),
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   ("isar_shrink_factor", "1"),
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   ("minimize_timeout", "5 s")]
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val alias_params =
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  [("atp", "atps")]
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val negated_alias_params =
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  [("no_debug", "debug"),
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   ("quiet", "verbose"),
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   ("no_overlord", "overlord"),
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   ("partial_types", "full_types"),
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   ("implicit_apply", "explicit_apply"),
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   ("ignore_no_atp", "respect_no_atp"),
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   ("theory_irrelevant", "theory_relevant"),
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   ("defs_irrelevant", "defs_relevant"),
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   ("no_isar_proof", "isar_proof")]
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val params_for_minimize =
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  ["debug", "verbose", "overlord", "full_types", "explicit_apply",
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   "isar_proof", "isar_shrink_factor", "minimize_timeout"]
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val property_dependent_params = ["atps", "full_types", "timeout"]
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fun is_known_raw_param s =
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  AList.defined (op =) default_default_params s orelse
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  AList.defined (op =) alias_params s orelse
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  AList.defined (op =) negated_alias_params s orelse
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  member (op =) property_dependent_params s
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fun check_raw_param (s, _) =
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  if is_known_raw_param s then ()
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  else error ("Unknown parameter: " ^ quote s ^ ".")
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fun unalias_raw_param (name, value) =
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  case AList.lookup (op =) alias_params name of
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    SOME name' => (name', value)
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  | NONE =>
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    case AList.lookup (op =) negated_alias_params name of
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      SOME name' => (name', case value of
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                              ["false"] => ["true"]
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                            | ["true"] => ["false"]
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                            | [] => ["false"]
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                            | _ => value)
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    | NONE => (name, value)
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structure Data = Theory_Data(
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  type T = raw_param list
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  val empty = default_default_params |> map (apsnd single)
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  val extend = I
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  fun merge p : T = AList.merge (op =) (K true) p)
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val set_default_raw_param = Data.map o AList.update (op =) o unalias_raw_param
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fun default_raw_params thy =
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  Data.get thy
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  |> fold (AList.default (op =))
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          [("atps", [case !atps of "" => default_atps_param_value () | s => s]),
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           ("full_types", [if !full_types then "true" else "false"]),
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           ("timeout", let val timeout = !timeout in
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                         [if timeout <= 0 then "none"
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                          else string_of_int timeout ^ " s"]
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                       end)]
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val infinity_time_in_secs = 60 * 60 * 24 * 365
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val the_timeout = the_default (Time.fromSeconds infinity_time_in_secs)
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fun extract_params thy default_params override_params =
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  let
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    val override_params = map unalias_raw_param override_params
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    val raw_params = rev override_params @ rev default_params
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    val lookup = Option.map (space_implode " ") o AList.lookup (op =) raw_params
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    val lookup_string = the_default "" o lookup
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    fun general_lookup_bool option default_value name =
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      case lookup name of
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        SOME s => parse_bool_option option name s
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      | NONE => default_value
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    val lookup_bool = the o general_lookup_bool false (SOME false)
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    val lookup_bool_option = general_lookup_bool true NONE
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    fun lookup_time name =
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      the_timeout (case lookup name of
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                     NONE => NONE
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                   | SOME s => parse_time_option name s)
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    fun lookup_int name =
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      case lookup name of
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        NONE => 0
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      | SOME s => case Int.fromString s of
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                    SOME n => n
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                  | NONE => error ("Parameter " ^ quote name ^
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                                   " must be assigned an integer value.")
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    val debug = lookup_bool "debug"
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    val verbose = debug orelse lookup_bool "verbose"
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    val overlord = lookup_bool "overlord"
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    val atps = lookup_string "atps" |> space_explode " "
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    val full_types = lookup_bool "full_types"
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    val explicit_apply = lookup_bool "explicit_apply"
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    val respect_no_atp = lookup_bool "respect_no_atp"
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    val relevance_threshold =
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      0.01 * Real.fromInt (lookup_int "relevance_threshold")
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    val relevance_convergence =
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      0.01 * Real.fromInt (lookup_int "relevance_convergence")
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    val theory_relevant = lookup_bool_option "theory_relevant"
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    val defs_relevant = lookup_bool "defs_relevant"
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    val isar_proof = lookup_bool "isar_proof"
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    val isar_shrink_factor = Int.max (1, lookup_int "isar_shrink_factor")
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    val timeout = lookup_time "timeout"
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    val minimize_timeout = lookup_time "minimize_timeout"
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  in
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    {debug = debug, verbose = verbose, overlord = overlord, atps = atps,
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     full_types = full_types, explicit_apply = explicit_apply,
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     respect_no_atp = respect_no_atp, relevance_threshold = relevance_threshold,
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     relevance_convergence = relevance_convergence,
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     theory_relevant = theory_relevant, defs_relevant = defs_relevant,
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     isar_proof = isar_proof, isar_shrink_factor = isar_shrink_factor,
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     timeout = timeout, minimize_timeout = minimize_timeout}
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  end
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fun get_params thy = extract_params thy (default_raw_params thy)
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fun default_params thy = get_params thy o map (apsnd single)
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val subgoal_count = Logic.count_prems o prop_of o #goal o Proof.goal
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(* Sledgehammer the given subgoal *)
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fun run {atps = [], ...} _ _ _ _ = error "No ATP is set."
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  | run (params as {atps, timeout, ...}) i relevance_override minimize_command
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        state =
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    case subgoal_count state of
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      0 => priority "No subgoal!"
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    | n =>
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      let
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        val birth_time = Time.now ()
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        val death_time = Time.+ (birth_time, timeout)
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        val _ = kill_atps ()  (* race w.r.t. other Sledgehammer invocations *)
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        val _ = priority "Sledgehammering..."
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        val _ = app (start_prover_thread params birth_time death_time i n
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                                         relevance_override minimize_command
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                                         state) atps
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      in () end
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fun minimize override_params i fact_refs state =
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  let
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    val thy = Proof.theory_of state
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    val ctxt = Proof.context_of state
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    val theorems_from_refs =
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      map o pairf Facts.string_of_ref o ProofContext.get_fact
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    val name_thms_pairs = theorems_from_refs ctxt fact_refs
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  in
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    case subgoal_count state of
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      0 => priority "No subgoal!"
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    | n => priority (#2 (minimize_theorems (get_params thy override_params) i n
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                                           state name_thms_pairs))
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  end
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val sledgehammerN = "sledgehammer"
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val sledgehammer_paramsN = "sledgehammer_params"
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val runN = "run"
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val minimizeN = "minimize"
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val messagesN = "messages"
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val available_atpsN = "available_atps"
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val running_atpsN = "running_atps"
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val kill_atpsN = "kill_atps"
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val refresh_tptpN = "refresh_tptp"
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val helpN = "help"
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fun minimizize_raw_param_name "timeout" = "minimize_timeout"
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  | minimizize_raw_param_name name = name
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val is_raw_param_relevant_for_minimize =
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  member (op =) params_for_minimize o fst o unalias_raw_param
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fun string_for_raw_param (key, values) =
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  key ^ (case space_implode " " values of "" => "" | value => " = " ^ value)
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fun minimize_command override_params i atp_name facts =
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  sledgehammerN ^ " " ^ minimizeN ^ " [atp = " ^ atp_name ^
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  (override_params |> filter is_raw_param_relevant_for_minimize
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                   |> implode o map (prefix ", " o string_for_raw_param)) ^
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  "] (" ^ space_implode " " facts ^ ")" ^
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  (if i = 1 then "" else " " ^ string_of_int i)
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fun hammer_away override_params subcommand opt_i relevance_override state =
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  let
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    val thy = Proof.theory_of state
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    val _ = app check_raw_param override_params
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  in
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    if subcommand = runN then
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      let val i = the_default 1 opt_i in
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        run (get_params thy override_params) i relevance_override
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            (minimize_command override_params i) state
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      end
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    else if subcommand = minimizeN then
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      minimize (map (apfst minimizize_raw_param_name) override_params)
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               (the_default 1 opt_i) (#add relevance_override) state
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    else if subcommand = messagesN then
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      messages opt_i
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    else if subcommand = available_atpsN then
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      available_atps thy
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    else if subcommand = running_atpsN then
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      running_atps ()
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    else if subcommand = kill_atpsN then
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      kill_atps ()
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    else if subcommand = refresh_tptpN then
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      refresh_systems_on_tptp ()
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    else
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      error ("Unknown subcommand: " ^ quote subcommand ^ ".")
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  end
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fun sledgehammer_trans (((subcommand, params), relevance_override), opt_i) =
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  Toplevel.keep (hammer_away params subcommand opt_i relevance_override
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                 o Toplevel.proof_of)
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fun string_for_raw_param (name, value) = name ^ " = " ^ space_implode " " value
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fun sledgehammer_params_trans params =
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  Toplevel.theory
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      (fold set_default_raw_param params
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       #> tap (fn thy => 
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                  writeln ("Default parameters for Sledgehammer:\n" ^
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                           (case rev (default_raw_params thy) of
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                              [] => "none"
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                            | params =>
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                              (map check_raw_param params;
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                               params |> map string_for_raw_param
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                                      |> sort_strings |> cat_lines)))))
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val parse_key = Scan.repeat1 Parse.typ_group >> space_implode " "
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val parse_value = Scan.repeat1 Parse.xname
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val parse_param = parse_key -- Scan.optional (Parse.$$$ "=" |-- parse_value) []
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val parse_params = Scan.optional (Args.bracks (Parse.list parse_param)) []
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val parse_fact_refs =
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  Scan.repeat1 (Scan.unless (Parse.name -- Args.colon)
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                            (Parse.xname -- Scan.option Attrib.thm_sel)
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                >> (fn (name, interval) =>
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                       Facts.Named ((name, Position.none), interval)))
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val parse_relevance_chunk =
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  (Args.add |-- Args.colon |-- parse_fact_refs >> add_to_relevance_override)
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  || (Args.del |-- Args.colon |-- parse_fact_refs
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      >> del_from_relevance_override)
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  || (parse_fact_refs >> only_relevance_override)
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val parse_relevance_override =
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  Scan.optional (Args.parens (Scan.repeat parse_relevance_chunk
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                              >> merge_relevance_overrides))
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                (add_to_relevance_override [])
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val parse_sledgehammer_command =
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  (Scan.optional Parse.short_ident runN -- parse_params -- parse_relevance_override
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   -- Scan.option Parse.nat) #>> sledgehammer_trans
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val parse_sledgehammer_params_command =
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  parse_params #>> sledgehammer_params_trans
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val _ =
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  Outer_Syntax.improper_command sledgehammerN
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      "search for first-order proof using automatic theorem provers" Keyword.diag
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      parse_sledgehammer_command
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val _ =
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  Outer_Syntax.command sledgehammer_paramsN
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      "set and display the default parameters for Sledgehammer" Keyword.thy_decl
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      parse_sledgehammer_params_command
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val setup =
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  neg_clausify_setup
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  #> clausify_setup
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end;