src/HOL/Tools/ATP_Manager/atp_wrapper.ML
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(*  Title:      HOL/Tools/ATP_Manager/atp_wrapper.ML
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    Author:     Fabian Immler, TU Muenchen
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Wrapper functions for external ATPs.
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*)
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signature ATP_WRAPPER =
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sig
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  (*hooks for problem files*)
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  val destdir: string Config.T
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  val problem_prefix: string Config.T
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  val setup: theory -> theory
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  (*prover configuration, problem format, and prover result*)
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  type prover_config =
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   {command: Path.T,
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    arguments: int -> string,
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    max_new_clauses: int,
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    insert_theory_const: bool,
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    emit_structured_proof: bool}
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  type atp_problem =
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   {with_full_types: bool,
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    subgoal: int,
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    goal: Proof.context * (thm list * thm),
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    axiom_clauses: (thm * (string * int)) list option,
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    filtered_clauses: (thm * (string * int)) list option}
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  val atp_problem_of_goal: bool -> int -> Proof.context * (thm list * thm) -> atp_problem
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  type prover_result =
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   {success: bool,
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    message: string,
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    theorem_names: string list,
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    runtime: int,
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    proof: string,
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    internal_thm_names: string Vector.vector,
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    filtered_clauses: (thm * (string * int)) list}
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  type prover = atp_problem -> int -> prover_result
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  (*common provers*)
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  val vampire: string * prover
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  val vampire_full: string * prover
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  val eprover: string * prover
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  val eprover_full: string * prover
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  val spass: string * prover
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  val spass_no_tc: string * prover
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  val remote_vampire: string * prover
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  val remote_eprover: string * prover
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  val remote_spass: string * prover
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  val refresh_systems: unit -> unit
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end;
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structure ATP_Wrapper: ATP_WRAPPER =
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struct
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(** generic ATP wrapper **)
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(* hooks for writing problem files *)
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val (destdir, destdir_setup) = Attrib.config_string "atp_destdir" "";
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  (*Empty string means create files in Isabelle's temporary files directory.*)
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val (problem_prefix, problem_prefix_setup) =
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  Attrib.config_string "atp_problem_prefix" "prob";
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val setup = destdir_setup #> problem_prefix_setup;
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(* prover configuration, problem format, and prover result *)
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type prover_config =
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 {command: Path.T,
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  arguments: int -> string,
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  max_new_clauses: int,
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  insert_theory_const: bool,
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  emit_structured_proof: bool};
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type atp_problem =
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 {with_full_types: bool,
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  subgoal: int,
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  goal: Proof.context * (thm list * thm),
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  axiom_clauses: (thm * (string * int)) list option,
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  filtered_clauses: (thm * (string * int)) list option};
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fun atp_problem_of_goal with_full_types subgoal goal : atp_problem =
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 {with_full_types = with_full_types,
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  subgoal = subgoal,
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  goal = goal,
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  axiom_clauses = NONE,
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  filtered_clauses = NONE};
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type prover_result =
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 {success: bool,
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  message: string,
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  theorem_names: string list,  (*relevant theorems*)
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  runtime: int,  (*user time of the ATP, in milliseconds*)
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  proof: string,
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  internal_thm_names: string Vector.vector,
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  filtered_clauses: (thm * (string * int)) list};
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type prover = atp_problem -> int -> prover_result;
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(* basic template *)
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fun with_path cleanup after f path =
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  Exn.capture f path
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  |> tap (fn _ => cleanup path)
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  |> Exn.release
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  |> tap (after path);
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fun external_prover relevance_filter prepare write cmd args find_failure produce_answer
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  axiom_clauses filtered_clauses name subgoalno goal =
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  let
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    (* get clauses and prepare them for writing *)
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    val (ctxt, (chain_ths, th)) = goal;
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    val thy = ProofContext.theory_of ctxt;
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    val chain_ths = map (Thm.put_name_hint ResReconstruct.chained_hint) chain_ths;
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    val goal_cls = #1 (ResAxioms.neg_conjecture_clauses ctxt th subgoalno);
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    val the_filtered_clauses =
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      (case filtered_clauses of
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        NONE => relevance_filter goal goal_cls
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      | SOME fcls => fcls);
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    val the_axiom_clauses =
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      (case axiom_clauses of
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        NONE => the_filtered_clauses
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      | SOME axcls => axcls);
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    val (thm_names, clauses) =
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      prepare goal_cls chain_ths the_axiom_clauses the_filtered_clauses thy;
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    (* path to unique problem file *)
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    val destdir' = Config.get ctxt destdir;
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    val problem_prefix' = Config.get ctxt problem_prefix;
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    fun prob_pathname nr =
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      let val probfile =
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        Path.basic (problem_prefix' ^ serial_string () ^ "_" ^ string_of_int nr)
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      in
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        if destdir' = "" then File.tmp_path probfile
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        else if File.exists (Path.explode (destdir'))
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        then Path.append  (Path.explode (destdir')) probfile
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        else error ("No such directory: " ^ destdir')
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      end;
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    (* write out problem file and call prover *)
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    fun cmd_line probfile = "TIMEFORMAT='%3U'; { time " ^ space_implode " "
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      [File.shell_path cmd, args, File.platform_path probfile] ^ " ; } 2>&1"
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    fun split_time s =
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      let
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        val split = String.tokens (fn c => str c = "\n");
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        val (proof, t) = s |> split |> split_last |> apfst cat_lines;
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        fun as_num f = f >> (fst o read_int);
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        val num = as_num (Scan.many1 Symbol.is_ascii_digit);
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        val digit = Scan.one Symbol.is_ascii_digit;
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        val num3 = as_num (digit ::: digit ::: (digit >> single));
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        val time = num --| Scan.$$ "." -- num3 >> (fn (a, b) => a * 1000 + b);
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        val as_time = the_default 0 o Scan.read Symbol.stopper time o explode;
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      in (proof, as_time t) end;
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    fun run_on probfile =
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      if File.exists cmd then
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        write probfile clauses
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        |> pair (apfst split_time (system_out (cmd_line probfile)))
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      else error ("Bad executable: " ^ Path.implode cmd);
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    (* if problemfile has not been exported, delete problemfile; otherwise export proof, too *)
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    fun cleanup probfile = if destdir' = "" then try File.rm probfile else NONE;
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    fun export probfile (((proof, _), _), _) =
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      if destdir' = "" then ()
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      else File.write (Path.explode (Path.implode probfile ^ "_proof")) proof;
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    val (((proof, time), rc), conj_pos) =
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      with_path cleanup export run_on (prob_pathname subgoalno);
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    (* check for success and print out some information on failure *)
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    val failure = find_failure proof;
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    val success = rc = 0 andalso is_none failure;
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    val (message, real_thm_names) =
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      if is_some failure then ("External prover failed.", [])
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      else if rc <> 0 then ("External prover failed: " ^ proof, [])
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      else apfst (fn s => "Try this command: " ^ s)
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        (produce_answer name (proof, thm_names, conj_pos, ctxt, th, subgoalno));
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  in
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    {success = success, message = message,
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      theorem_names = real_thm_names, runtime = time, proof = proof,
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      internal_thm_names = thm_names, filtered_clauses = the_filtered_clauses}
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  end;
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(* generic TPTP-based provers *)
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fun gen_tptp_prover (name, prover_config) problem timeout =
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  let
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    val {max_new_clauses, insert_theory_const, emit_structured_proof, command, arguments} =
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      prover_config;
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    val {with_full_types, subgoal, goal, axiom_clauses, filtered_clauses} = problem;
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  in
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    external_prover
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      (ResAtp.get_relevant max_new_clauses insert_theory_const)
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      (ResAtp.prepare_clauses false)
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      (ResHolClause.tptp_write_file with_full_types)
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      command
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      (arguments timeout)
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      ResReconstruct.find_failure
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      (if emit_structured_proof then ResReconstruct.structured_proof
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       else ResReconstruct.lemma_list false)
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      axiom_clauses
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      filtered_clauses
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      name
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      subgoal
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      goal
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  end;
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fun tptp_prover (name, config) = (name, gen_tptp_prover (name, config));
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(** common provers **)
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(* Vampire *)
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(*NB: Vampire does not work without explicit timelimit*)
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val vampire_max_new_clauses = 60;
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val vampire_insert_theory_const = false;
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fun vampire_prover_config full : prover_config =
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 {command = Path.explode "$VAMPIRE_HOME/vampire",
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  arguments = (fn timeout => "--output_syntax tptp --mode casc" ^
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    " -t " ^ string_of_int timeout),
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  max_new_clauses = vampire_max_new_clauses,
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  insert_theory_const = vampire_insert_theory_const,
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  emit_structured_proof = full};
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val vampire = tptp_prover ("vampire", vampire_prover_config false);
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val vampire_full = tptp_prover ("vampire_full", vampire_prover_config true);
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(* E prover *)
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val eprover_max_new_clauses = 100;
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val eprover_insert_theory_const = false;
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fun eprover_config full : prover_config =
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 {command = Path.explode "$E_HOME/eproof",
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  arguments = (fn timeout => "--tstp-in --tstp-out -l5 -xAutoDev -tAutoDev" ^
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    " --silent --cpu-limit=" ^ string_of_int timeout),
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  max_new_clauses = eprover_max_new_clauses,
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  insert_theory_const = eprover_insert_theory_const,
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  emit_structured_proof = full};
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val eprover = tptp_prover ("e", eprover_config false);
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val eprover_full = tptp_prover ("e_full", eprover_config true);
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(* SPASS *)
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val spass_max_new_clauses = 40;
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val spass_insert_theory_const = true;
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fun spass_config insert_theory_const: prover_config =
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 {command = Path.explode "$SPASS_HOME/SPASS",
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  arguments = (fn timeout => "-Auto -SOS=1 -PGiven=0 -PProblem=0 -Splits=0" ^
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    " -FullRed=0 -DocProof -TimeLimit=" ^ string_of_int timeout),
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  max_new_clauses = spass_max_new_clauses,
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  insert_theory_const = insert_theory_const,
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  emit_structured_proof = false};
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fun gen_dfg_prover (name, prover_config: prover_config) problem timeout =
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  let
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    val {max_new_clauses, insert_theory_const, command, arguments, ...} = prover_config
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    val {with_full_types, subgoal, goal, axiom_clauses, filtered_clauses} = problem
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  in
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    external_prover
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      (ResAtp.get_relevant max_new_clauses insert_theory_const)
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      (ResAtp.prepare_clauses true)
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      (ResHolClause.dfg_write_file with_full_types)
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      command
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      (arguments timeout)
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      ResReconstruct.find_failure
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      (ResReconstruct.lemma_list true)
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      axiom_clauses
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      filtered_clauses
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      name
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      subgoal
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      goal
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  end;
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fun dfg_prover (name, config) = (name, gen_dfg_prover (name, config));
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val spass = dfg_prover ("spass", spass_config spass_insert_theory_const);
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val spass_no_tc = dfg_prover ("spass_no_tc", spass_config false);
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(* remote prover invocation via SystemOnTPTP *)
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val systems = Synchronized.var "atp_wrapper_systems" ([]: string list);
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fun get_systems () =
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  let
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    val (answer, rc) = system_out ("\"$ISABELLE_ATP_MANAGER/SystemOnTPTP\" -w")
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  in
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    if rc <> 0 then error ("Failed to get available systems from SystemOnTPTP:\n" ^ answer)
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    else split_lines answer
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  end;
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fun refresh_systems () = Synchronized.change systems (fn _ => get_systems ());
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fun get_system prefix = Synchronized.change_result systems (fn systems =>
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  (if null systems then get_systems () else systems)
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  |> `(find_first (String.isPrefix prefix)));
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fun get_the_system prefix =
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  (case get_system prefix of
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    NONE => error ("No system like " ^ quote prefix ^ " at SystemOnTPTP")
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  | SOME sys => sys);
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fun remote_prover_config prover_prefix args max_new insert_tc: prover_config =
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 {command = Path.explode "$ISABELLE_ATP_MANAGER/SystemOnTPTP",
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  arguments =
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    (fn timeout => args ^ " -t " ^ string_of_int timeout ^ " -s " ^ get_the_system prover_prefix),
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  max_new_clauses = max_new,
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  insert_theory_const = insert_tc,
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  emit_structured_proof = false};
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val remote_vampire = tptp_prover ("remote_vampire", remote_prover_config
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  "Vampire---9" "" vampire_max_new_clauses vampire_insert_theory_const);
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val remote_eprover = tptp_prover ("remote_e", remote_prover_config
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  "EP---" "" eprover_max_new_clauses eprover_insert_theory_const);
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val remote_spass = tptp_prover ("remote_spass", remote_prover_config
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  "SPASS---" "-x" spass_max_new_clauses spass_insert_theory_const);
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end;