src/HOL/Tools/Sledgehammer/sledgehammer_provers.ML
author blanchet
Thu Dec 16 15:12:17 2010 +0100 (2010-12-16 ago)
changeset 41209 91fab0d3553b
parent 41208 1b28c43a7074
child 41211 1e2e16bc0077
permissions -rw-r--r--
robustly handle SMT exceptions in Sledgehammer
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(*  Title:      HOL/Tools/Sledgehammer/sledgehammer_provers.ML
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    Author:     Fabian Immler, TU Muenchen
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    Author:     Makarius
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    Author:     Jasmin Blanchette, TU Muenchen
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Generic prover abstraction for Sledgehammer.
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*)
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signature SLEDGEHAMMER_PROVERS =
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sig
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  type failure = ATP_Proof.failure
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  type locality = Sledgehammer_Filter.locality
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  type relevance_fudge = Sledgehammer_Filter.relevance_fudge
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  type translated_formula = Sledgehammer_ATP_Translate.translated_formula
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  type type_system = Sledgehammer_ATP_Translate.type_system
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  type minimize_command = Sledgehammer_ATP_Reconstruct.minimize_command
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  type params =
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    {debug: bool,
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     verbose: bool,
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     overlord: bool,
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     blocking: bool,
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     provers: string list,
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     type_sys: type_system,
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     explicit_apply: bool,
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     relevance_thresholds: real * real,
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     max_relevant: int option,
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     isar_proof: bool,
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     isar_shrink_factor: int,
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     timeout: Time.time,
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     expect: string}
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  datatype prover_fact =
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    Untranslated_Fact of (string * locality) * thm |
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    ATP_Translated_Fact of
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      translated_formula option * ((string * locality) * thm)
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  type prover_problem =
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    {state: Proof.state,
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     goal: thm,
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     subgoal: int,
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     subgoal_count: int,
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     facts: prover_fact list}
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  type prover_result =
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    {outcome: failure option,
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     used_facts: (string * locality) list,
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     run_time_in_msecs: int option,
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     message: string}
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  type prover = params -> minimize_command -> prover_problem -> prover_result
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  (* for experimentation purposes -- do not use in production code *)
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  val smt_max_iter : int Unsynchronized.ref
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  val smt_iter_fact_frac : real Unsynchronized.ref
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  val smt_iter_time_frac : real Unsynchronized.ref
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  val smt_iter_min_msecs : int Unsynchronized.ref
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  val smt_monomorph_limit : int Unsynchronized.ref
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  val smt_weights : bool Unsynchronized.ref
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  val smt_min_weight : int Unsynchronized.ref
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  val smt_max_weight : int Unsynchronized.ref
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  val smt_max_index : int Unsynchronized.ref
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  val smt_weight_curve : (int -> int) Unsynchronized.ref
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  val das_Tool : string
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  val is_smt_prover : Proof.context -> string -> bool
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  val is_prover_available : Proof.context -> string -> bool
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  val is_prover_installed : Proof.context -> string -> bool
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  val default_max_relevant_for_prover : Proof.context -> string -> int
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  val is_built_in_const_for_prover :
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    Proof.context -> string -> string * typ -> term list -> bool
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  val atp_relevance_fudge : relevance_fudge
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  val smt_relevance_fudge : relevance_fudge
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  val relevance_fudge_for_prover : Proof.context -> string -> relevance_fudge
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  val dest_dir : string Config.T
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  val problem_prefix : string Config.T
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  val measure_run_time : bool Config.T
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  val untranslated_fact : prover_fact -> (string * locality) * thm
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  val available_provers : Proof.context -> unit
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  val kill_provers : unit -> unit
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  val running_provers : unit -> unit
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  val messages : int option -> unit
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  val get_prover : Proof.context -> bool -> string -> prover
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  val setup : theory -> theory
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end;
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structure Sledgehammer_Provers : SLEDGEHAMMER_PROVERS =
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struct
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open ATP_Problem
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open ATP_Proof
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open ATP_Systems
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open Metis_Translate
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open Sledgehammer_Util
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open Sledgehammer_Filter
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open Sledgehammer_ATP_Translate
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open Sledgehammer_ATP_Reconstruct
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(** The Sledgehammer **)
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(* Identifier to distinguish Sledgehammer from other tools using
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   "Async_Manager". *)
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val das_Tool = "Sledgehammer"
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fun is_smt_prover ctxt name =
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  let val smts = SMT_Solver.available_solvers_of ctxt in
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    case try (unprefix remote_prefix) name of
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      SOME suffix => member (op =) smts suffix andalso
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                     SMT_Solver.is_remotely_available ctxt suffix
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    | NONE => member (op =) smts name
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  end
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fun is_prover_available ctxt name =
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  let val thy = ProofContext.theory_of ctxt in
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    is_smt_prover ctxt name orelse member (op =) (available_atps thy) name
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  end
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fun is_prover_installed ctxt name =
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  let val thy = ProofContext.theory_of ctxt in
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    if is_smt_prover ctxt name then
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      String.isPrefix remote_prefix name orelse
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      SMT_Solver.is_locally_installed ctxt name
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    else
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      is_atp_installed thy name
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  end
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fun available_smt_solvers ctxt =
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  let val smts = SMT_Solver.available_solvers_of ctxt in
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    smts @ map (prefix remote_prefix)
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               (filter (SMT_Solver.is_remotely_available ctxt) smts)
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  end
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fun default_max_relevant_for_prover ctxt name =
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  let val thy = ProofContext.theory_of ctxt in
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    if is_smt_prover ctxt name then
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      SMT_Solver.default_max_relevant ctxt
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          (perhaps (try (unprefix remote_prefix)) name)
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    else
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      #default_max_relevant (get_atp thy name)
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  end
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(* These are either simplified away by "Meson.presimplify" (most of the time) or
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   handled specially via "fFalse", "fTrue", ..., "fequal". *)
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val atp_irrelevant_consts =
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  [@{const_name False}, @{const_name True}, @{const_name Not},
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   @{const_name conj}, @{const_name disj}, @{const_name implies},
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   @{const_name HOL.eq}, @{const_name If}, @{const_name Let}]
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fun is_built_in_const_for_prover ctxt name (s, T) args =
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  if is_smt_prover ctxt name then SMT_Builtin.is_builtin_ext ctxt (s, T) args
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  else member (op =) atp_irrelevant_consts s
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(* FUDGE *)
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val atp_relevance_fudge =
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  {allow_ext = true,
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   worse_irrel_freq = 100.0,
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   higher_order_irrel_weight = 1.05,
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   abs_rel_weight = 0.5,
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   abs_irrel_weight = 2.0,
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   skolem_irrel_weight = 0.75,
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   theory_const_rel_weight = 0.5,
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   theory_const_irrel_weight = 0.25,
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   intro_bonus = 0.15,
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   elim_bonus = 0.15,
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   simp_bonus = 0.15,
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   local_bonus = 0.55,
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   assum_bonus = 1.05,
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   chained_bonus = 1.5,
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   max_imperfect = 11.5,
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   max_imperfect_exp = 1.0,
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   threshold_divisor = 2.0,
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   ridiculous_threshold = 0.01}
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(* FUDGE (FIXME) *)
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val smt_relevance_fudge =
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  {allow_ext = false,
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   worse_irrel_freq = #worse_irrel_freq atp_relevance_fudge,
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   higher_order_irrel_weight = #higher_order_irrel_weight atp_relevance_fudge,
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   abs_rel_weight = #abs_rel_weight atp_relevance_fudge,
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   abs_irrel_weight = #abs_irrel_weight atp_relevance_fudge,
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   skolem_irrel_weight = #skolem_irrel_weight atp_relevance_fudge,
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   theory_const_rel_weight = #theory_const_rel_weight atp_relevance_fudge,
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   theory_const_irrel_weight = #theory_const_irrel_weight atp_relevance_fudge,
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   intro_bonus = #intro_bonus atp_relevance_fudge,
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   elim_bonus = #elim_bonus atp_relevance_fudge,
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   simp_bonus = #simp_bonus atp_relevance_fudge,
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   local_bonus = #local_bonus atp_relevance_fudge,
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   assum_bonus = #assum_bonus atp_relevance_fudge,
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   chained_bonus = #chained_bonus atp_relevance_fudge,
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   max_imperfect = #max_imperfect atp_relevance_fudge,
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   max_imperfect_exp = #max_imperfect_exp atp_relevance_fudge,
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   threshold_divisor = #threshold_divisor atp_relevance_fudge,
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   ridiculous_threshold = #ridiculous_threshold atp_relevance_fudge}
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fun relevance_fudge_for_prover ctxt name =
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  if is_smt_prover ctxt name then smt_relevance_fudge else atp_relevance_fudge
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fun available_provers ctxt =
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  let
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    val thy = ProofContext.theory_of ctxt
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    val (remote_provers, local_provers) =
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      sort_strings (available_atps thy) @
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      sort_strings (available_smt_solvers ctxt)
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      |> List.partition (String.isPrefix remote_prefix)
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  in
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    Output.urgent_message ("Available provers: " ^
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                           commas (local_provers @ remote_provers) ^ ".")
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  end
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fun kill_provers () = Async_Manager.kill_threads das_Tool "provers"
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fun running_provers () = Async_Manager.running_threads das_Tool "provers"
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val messages = Async_Manager.thread_messages das_Tool "prover"
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(** problems, results, ATPs, etc. **)
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type params =
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  {debug: bool,
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   verbose: bool,
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   overlord: bool,
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   blocking: bool,
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   provers: string list,
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   type_sys: type_system,
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   explicit_apply: bool,
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   relevance_thresholds: real * real,
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   max_relevant: int option,
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   isar_proof: bool,
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   isar_shrink_factor: int,
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   timeout: Time.time,
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   expect: string}
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datatype prover_fact =
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  Untranslated_Fact of (string * locality) * thm |
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  ATP_Translated_Fact of translated_formula option * ((string * locality) * thm)
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type prover_problem =
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  {state: Proof.state,
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   goal: thm,
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   subgoal: int,
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   subgoal_count: int,
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   facts: prover_fact list}
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type prover_result =
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  {outcome: failure option,
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   message: string,
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   used_facts: (string * locality) list,
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   run_time_in_msecs: int option}
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type prover = params -> minimize_command -> prover_problem -> prover_result
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(* configuration attributes *)
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val (dest_dir, dest_dir_setup) =
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  Attrib.config_string "sledgehammer_dest_dir" (K "")
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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 "sledgehammer_problem_prefix" (K "prob")
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val (measure_run_time, measure_run_time_setup) =
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  Attrib.config_bool "sledgehammer_measure_run_time" (K false)
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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 proof_banner auto =
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  if auto then "Auto Sledgehammer found a proof" else "Try this command"
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(* generic TPTP-based ATPs *)
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fun untranslated_fact (Untranslated_Fact p) = p
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  | untranslated_fact (ATP_Translated_Fact (_, p)) = p
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fun atp_translated_fact ctxt (Untranslated_Fact p) = translate_atp_fact ctxt p
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  | atp_translated_fact _ (ATP_Translated_Fact q) = q
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fun int_opt_add (SOME m) (SOME n) = SOME (m + n)
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  | int_opt_add _ _ = NONE
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fun overlord_file_location_for_prover prover =
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  (getenv "ISABELLE_HOME_USER", "prob_" ^ prover)
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val atp_first_iter_time_frac = 0.67
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(* Important messages are important but not so important that users want to see
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   them each time. *)
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val important_message_keep_factor = 0.1
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fun run_atp auto name
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        ({exec, required_execs, arguments, has_incomplete_mode, proof_delims,
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          known_failures, explicit_forall, use_conjecture_for_hypotheses, ...}
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          : atp_config)
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        ({debug, verbose, overlord, type_sys, explicit_apply, isar_proof,
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          isar_shrink_factor, timeout, ...} : params)
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        minimize_command ({state, goal, subgoal, facts, ...} : prover_problem) =
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  let
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    val ctxt = Proof.context_of state
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    val (_, hyp_ts, concl_t) = strip_subgoal goal subgoal
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    val facts = facts |> map (atp_translated_fact ctxt)
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    val (dest_dir, problem_prefix) =
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      if overlord then overlord_file_location_for_prover name
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      else (Config.get ctxt dest_dir, Config.get ctxt problem_prefix)
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    val problem_file_name =
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      Path.basic (problem_prefix ^ (if overlord then "" else serial_string ()) ^
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                  "_" ^ string_of_int subgoal)
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    val problem_path_name =
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      if dest_dir = "" then
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        File.tmp_path problem_file_name
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      else if File.exists (Path.explode dest_dir) then
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        Path.append (Path.explode dest_dir) problem_file_name
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      else
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        error ("No such directory: " ^ quote dest_dir ^ ".")
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    val measure_run_time = verbose orelse Config.get ctxt measure_run_time
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    val command = Path.explode (getenv (fst exec) ^ "/" ^ snd exec)
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    (* write out problem file and call ATP *)
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    fun command_line complete timeout probfile =
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      let
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        val core = File.shell_path command ^ " " ^ arguments complete timeout ^
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                   " " ^ File.shell_path probfile
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      in
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        (if measure_run_time then "TIMEFORMAT='%3R'; { time " ^ core ^ " ; }"
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         else "exec " ^ core) ^ " 2>&1"
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      end
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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");
blanchet@38023
   328
        val (output, t) = s |> split |> split_last |> apfst cat_lines;
blanchet@38023
   329
        fun as_num f = f >> (fst o read_int);
blanchet@38023
   330
        val num = as_num (Scan.many1 Symbol.is_ascii_digit);
blanchet@38023
   331
        val digit = Scan.one Symbol.is_ascii_digit;
blanchet@38023
   332
        val num3 = as_num (digit ::: digit ::: (digit >> single));
blanchet@38023
   333
        val time = num --| Scan.$$ "." -- num3 >> (fn (a, b) => a * 1000 + b);
wenzelm@40627
   334
        val as_time = Scan.read Symbol.stopper time o raw_explode
blanchet@38023
   335
      in (output, as_time t) end;
blanchet@38023
   336
    fun run_on probfile =
blanchet@38092
   337
      case filter (curry (op =) "" o getenv o fst) (exec :: required_execs) of
blanchet@38032
   338
        (home_var, _) :: _ =>
blanchet@38023
   339
        error ("The environment variable " ^ quote home_var ^ " is not set.")
blanchet@38032
   340
      | [] =>
blanchet@38032
   341
        if File.exists command then
blanchet@38032
   342
          let
blanchet@39318
   343
            fun run complete timeout =
blanchet@38032
   344
              let
blanchet@38645
   345
                val command = command_line complete timeout probfile
blanchet@38032
   346
                val ((output, msecs), res_code) =
blanchet@38032
   347
                  bash_output command
blanchet@38032
   348
                  |>> (if overlord then
blanchet@38032
   349
                         prefix ("% " ^ command ^ "\n% " ^ timestamp () ^ "\n")
blanchet@38032
   350
                       else
blanchet@38032
   351
                         I)
blanchet@40062
   352
                  |>> (if measure_run_time then split_time else rpair NONE)
blanchet@39452
   353
                val (tstplike_proof, outcome) =
blanchet@39452
   354
                  extract_tstplike_proof_and_outcome complete res_code
blanchet@39452
   355
                      proof_delims known_failures output
blanchet@39452
   356
              in (output, msecs, tstplike_proof, outcome) end
blanchet@38032
   357
            val readable_names = debug andalso overlord
blanchet@40204
   358
            val (atp_problem, pool, conjecture_offset, fact_names) =
blanchet@41134
   359
              prepare_atp_problem ctxt readable_names explicit_forall type_sys
blanchet@40204
   360
                                  explicit_apply hyp_ts concl_t facts
blanchet@39452
   361
            val ss = tptp_strings_for_atp_problem use_conjecture_for_hypotheses
blanchet@40059
   362
                                                  atp_problem
blanchet@38631
   363
            val _ = File.write_list probfile ss
blanchet@38032
   364
            val conjecture_shape =
blanchet@38032
   365
              conjecture_offset + 1 upto conjecture_offset + length hyp_ts + 1
blanchet@38040
   366
              |> map single
blanchet@39318
   367
            val run_twice = has_incomplete_mode andalso not auto
blanchet@38645
   368
            val timer = Timer.startRealTimer ()
blanchet@38032
   369
            val result =
blanchet@41168
   370
              run false
blanchet@41168
   371
                 (if run_twice then
blanchet@41169
   372
                    seconds (0.001 * atp_first_iter_time_frac
blanchet@41168
   373
                             * Real.fromInt (Time.toMilliseconds timeout))
blanchet@41168
   374
                  else
blanchet@41168
   375
                    timeout)
blanchet@39318
   376
              |> run_twice
blanchet@38645
   377
                 ? (fn (_, msecs0, _, SOME _) =>
blanchet@39318
   378
                       run true (Time.- (timeout, Timer.checkRealTimer timer))
blanchet@39452
   379
                       |> (fn (output, msecs, tstplike_proof, outcome) =>
blanchet@40409
   380
                              (output, int_opt_add msecs0 msecs, tstplike_proof,
blanchet@40409
   381
                               outcome))
blanchet@38645
   382
                     | result => result)
blanchet@40204
   383
          in ((pool, conjecture_shape, fact_names), result) end
blanchet@38032
   384
        else
blanchet@38032
   385
          error ("Bad executable: " ^ Path.implode command ^ ".")
blanchet@38023
   386
blanchet@38023
   387
    (* If the problem file has not been exported, remove it; otherwise, export
blanchet@38023
   388
       the proof file too. *)
blanchet@38023
   389
    fun cleanup probfile =
blanchet@40059
   390
      if dest_dir = "" then try File.rm probfile else NONE
blanchet@38023
   391
    fun export probfile (_, (output, _, _, _)) =
blanchet@40059
   392
      if dest_dir = "" then
blanchet@38023
   393
        ()
blanchet@38023
   394
      else
blanchet@38023
   395
        File.write (Path.explode (Path.implode probfile ^ "_proof")) output
blanchet@40204
   396
    val ((pool, conjecture_shape, fact_names),
blanchet@39452
   397
         (output, msecs, tstplike_proof, outcome)) =
blanchet@40061
   398
      with_path cleanup export run_on problem_path_name
blanchet@40204
   399
    val (conjecture_shape, fact_names) =
blanchet@40204
   400
      repair_conjecture_shape_and_fact_names output conjecture_shape fact_names
blanchet@39492
   401
    val important_message =
blanchet@40224
   402
      if not auto andalso random () <= important_message_keep_factor then
blanchet@39492
   403
        extract_important_message output
blanchet@39492
   404
      else
blanchet@39492
   405
        ""
blanchet@40204
   406
    val (message, used_facts) =
blanchet@38023
   407
      case outcome of
blanchet@38023
   408
        NONE =>
blanchet@38023
   409
        proof_text isar_proof
blanchet@38023
   410
            (pool, debug, isar_shrink_factor, ctxt, conjecture_shape)
blanchet@41136
   411
            (proof_banner auto, type_sys, minimize_command, tstplike_proof,
blanchet@40204
   412
             fact_names, goal, subgoal)
blanchet@38744
   413
        |>> (fn message =>
blanchet@40341
   414
                message ^
blanchet@40341
   415
                (if verbose then
blanchet@40341
   416
                   "\nATP real CPU time: " ^
blanchet@40341
   417
                   string_from_time (Time.fromMilliseconds (the msecs)) ^ "."
blanchet@40341
   418
                 else
blanchet@40341
   419
                   "") ^
blanchet@39107
   420
                (if important_message <> "" then
blanchet@39107
   421
                   "\n\nImportant message from Dr. Geoff Sutcliffe:\n" ^
blanchet@39107
   422
                   important_message
blanchet@39107
   423
                 else
blanchet@39107
   424
                   ""))
blanchet@40669
   425
      | SOME failure => (string_for_failure "ATP" failure, [])
blanchet@38023
   426
  in
blanchet@40204
   427
    {outcome = outcome, message = message, used_facts = used_facts,
blanchet@40061
   428
     run_time_in_msecs = msecs}
blanchet@38023
   429
  end
blanchet@38023
   430
blanchet@40669
   431
(* "SMT_Failure.Abnormal_Termination" carries the solver's return code. Until
blanchet@40669
   432
   these are sorted out properly in the SMT module, we have to interpret these
blanchet@40669
   433
   ourselves. *)
blanchet@40684
   434
val remote_smt_failures =
blanchet@40684
   435
  [(22, CantConnect),
blanchet@40684
   436
   (127, NoPerl),
blanchet@40684
   437
   (2, NoLibwwwPerl)]
blanchet@40684
   438
val z3_failures =
blanchet@40684
   439
  [(103, MalformedInput),
blanchet@40684
   440
   (110, MalformedInput)]
blanchet@40684
   441
val unix_failures =
blanchet@40684
   442
  [(139, Crashed)]
blanchet@40684
   443
val smt_failures = remote_smt_failures @ z3_failures @ unix_failures
blanchet@40555
   444
blanchet@41209
   445
val internal_error_prefix = "Internal error: "
blanchet@41209
   446
boehmes@40424
   447
fun failure_from_smt_failure (SMT_Failure.Counterexample _) = Unprovable
boehmes@40424
   448
  | failure_from_smt_failure SMT_Failure.Time_Out = TimedOut
boehmes@40561
   449
  | failure_from_smt_failure (SMT_Failure.Abnormal_Termination code) =
blanchet@40684
   450
    (case AList.lookup (op =) smt_failures code of
blanchet@40684
   451
       SOME failure => failure
blanchet@40684
   452
     | NONE => UnknownError)
boehmes@40424
   453
  | failure_from_smt_failure SMT_Failure.Out_Of_Memory = OutOfResources
blanchet@41209
   454
  | failure_from_smt_failure (SMT_Failure.Other_Failure msg) =
blanchet@41209
   455
    if String.isPrefix internal_error_prefix msg then InternalError
blanchet@41209
   456
    else UnknownError
blanchet@40063
   457
blanchet@40698
   458
(* FUDGE *)
blanchet@41168
   459
val smt_max_iter = Unsynchronized.ref 8
blanchet@41169
   460
val smt_iter_fact_frac = Unsynchronized.ref 0.5
blanchet@41169
   461
val smt_iter_time_frac = Unsynchronized.ref 0.5
blanchet@41168
   462
val smt_iter_min_msecs = Unsynchronized.ref 5000
blanchet@41168
   463
val smt_monomorph_limit = Unsynchronized.ref 4
blanchet@40409
   464
blanchet@41171
   465
fun smt_filter_loop ({debug, verbose, timeout, ...} : params) remote state i =
blanchet@40409
   466
  let
blanchet@40553
   467
    val ctxt = Proof.context_of state
blanchet@41168
   468
    fun iter timeout iter_num outcome0 time_so_far facts =
blanchet@40553
   469
      let
blanchet@40553
   470
        val timer = Timer.startRealTimer ()
blanchet@40553
   471
        val ms = timeout |> Time.toMilliseconds
blanchet@40553
   472
        val iter_timeout =
blanchet@41168
   473
          if iter_num < !smt_max_iter then
blanchet@41169
   474
            Int.min (ms,
blanchet@41169
   475
                Int.max (!smt_iter_min_msecs,
blanchet@41169
   476
                    Real.ceil (!smt_iter_time_frac * Real.fromInt ms)))
blanchet@40553
   477
            |> Time.fromMilliseconds
blanchet@40553
   478
          else
blanchet@40553
   479
            timeout
blanchet@40553
   480
        val num_facts = length facts
blanchet@40553
   481
        val _ =
blanchet@40553
   482
          if verbose then
blanchet@40553
   483
            "SMT iteration with " ^ string_of_int num_facts ^ " fact" ^
blanchet@40668
   484
            plural_s num_facts ^ " for " ^ string_from_time iter_timeout ^ "..."
blanchet@40553
   485
            |> Output.urgent_message
blanchet@40553
   486
          else
blanchet@40553
   487
            ()
blanchet@41168
   488
        val birth = Timer.checkRealTimer timer
blanchet@41171
   489
        val _ =
blanchet@41171
   490
          if debug then
blanchet@41171
   491
            Output.urgent_message "Invoking SMT solver..."
blanchet@41171
   492
          else
blanchet@41171
   493
            ()
blanchet@41209
   494
        val (outcome, used_facts) =
blanchet@40979
   495
          SMT_Solver.smt_filter remote iter_timeout state facts i
blanchet@41209
   496
          |> (fn {outcome, used_facts, ...} => (outcome, used_facts))
blanchet@41209
   497
          handle exn => if Exn.is_interrupt exn then
blanchet@41209
   498
                          reraise exn
blanchet@41209
   499
                        else
blanchet@41209
   500
                          (internal_error_prefix ^ ML_Compiler.exn_message exn
blanchet@41209
   501
                           |> SMT_Failure.Other_Failure |> SOME, [])
blanchet@41168
   502
        val death = Timer.checkRealTimer timer
blanchet@40553
   503
        val _ =
blanchet@40553
   504
          if verbose andalso is_some outcome then
blanchet@40553
   505
            "SMT outcome: " ^ SMT_Failure.string_of_failure ctxt (the outcome)
blanchet@40553
   506
            |> Output.urgent_message
blanchet@41171
   507
          else if debug then
blanchet@41171
   508
            Output.urgent_message "SMT solver returned."
blanchet@40553
   509
          else
blanchet@40553
   510
            ()
blanchet@40553
   511
        val outcome0 = if is_none outcome0 then SOME outcome else outcome0
blanchet@41168
   512
        val time_so_far = Time.+ (time_so_far, Time.- (death, birth))
blanchet@40553
   513
        val too_many_facts_perhaps =
blanchet@40553
   514
          case outcome of
blanchet@40553
   515
            NONE => false
blanchet@40553
   516
          | SOME (SMT_Failure.Counterexample _) => false
blanchet@40553
   517
          | SOME SMT_Failure.Time_Out => iter_timeout <> timeout
boehmes@40561
   518
          | SOME (SMT_Failure.Abnormal_Termination code) =>
blanchet@40553
   519
            (if verbose then
blanchet@40555
   520
               "The SMT solver invoked with " ^ string_of_int num_facts ^
blanchet@40692
   521
               " fact" ^ plural_s num_facts ^ " terminated abnormally with \
blanchet@40692
   522
               \exit code " ^ string_of_int code ^ "."
blanchet@40692
   523
               |> warning
blanchet@40553
   524
             else
blanchet@40553
   525
               ();
blanchet@40553
   526
             true (* kind of *))
blanchet@40553
   527
          | SOME SMT_Failure.Out_Of_Memory => true
blanchet@40553
   528
          | SOME _ => true
blanchet@40553
   529
        val timeout = Time.- (timeout, Timer.checkRealTimer timer)
blanchet@40553
   530
      in
blanchet@41168
   531
        if too_many_facts_perhaps andalso iter_num < !smt_max_iter andalso
blanchet@40553
   532
           num_facts > 0 andalso Time.> (timeout, Time.zeroTime) then
blanchet@41169
   533
          let
blanchet@41169
   534
            val n = Real.ceil (!smt_iter_fact_frac * Real.fromInt num_facts)
blanchet@41169
   535
          in iter timeout (iter_num + 1) outcome0 time_so_far (take n facts) end
blanchet@40553
   536
        else
blanchet@40553
   537
          {outcome = if is_none outcome then NONE else the outcome0,
blanchet@41168
   538
           used_facts = used_facts,
blanchet@41168
   539
           run_time_in_msecs = SOME (Time.toMilliseconds time_so_far)}
blanchet@40409
   540
      end
blanchet@41168
   541
  in iter timeout 1 NONE Time.zeroTime end
blanchet@40409
   542
blanchet@40666
   543
(* taken from "Mirabelle" and generalized *)
blanchet@40666
   544
fun can_apply timeout tac state i =
blanchet@40666
   545
  let
blanchet@40666
   546
    val {context = ctxt, facts, goal} = Proof.goal state
blanchet@40666
   547
    val full_tac = Method.insert_tac facts i THEN tac ctxt i
blanchet@40666
   548
  in
blanchet@40666
   549
    case try (TimeLimit.timeLimit timeout (Seq.pull o full_tac)) goal of
blanchet@40666
   550
      SOME (SOME _) => true
blanchet@40666
   551
    | _ => false
blanchet@40666
   552
  end
blanchet@40666
   553
blanchet@41152
   554
val smt_metis_timeout = seconds 1.0
blanchet@40666
   555
blanchet@40693
   556
fun can_apply_metis debug state i ths =
blanchet@40693
   557
  can_apply smt_metis_timeout
blanchet@40693
   558
            (Config.put Metis_Tactics.verbose debug
blanchet@40693
   559
             #> (fn ctxt => Metis_Tactics.metis_tac ctxt ths)) state i
blanchet@40666
   560
blanchet@41168
   561
val smt_weights = Unsynchronized.ref true
blanchet@41168
   562
val smt_weight_min_facts = 20
blanchet@41168
   563
blanchet@41168
   564
(* FUDGE *)
blanchet@41168
   565
val smt_min_weight = Unsynchronized.ref 0
blanchet@41168
   566
val smt_max_weight = Unsynchronized.ref 10
blanchet@41168
   567
val smt_max_index = Unsynchronized.ref 200
blanchet@41168
   568
val smt_weight_curve = Unsynchronized.ref (fn x : int => x * x)
blanchet@41168
   569
blanchet@41168
   570
fun smt_fact_weight j num_facts =
blanchet@41168
   571
  if !smt_weights andalso num_facts >= smt_weight_min_facts then
blanchet@41168
   572
    SOME (!smt_max_weight
blanchet@41169
   573
          - (!smt_max_weight - !smt_min_weight + 1)
blanchet@41169
   574
            * !smt_weight_curve (Int.max (0, !smt_max_index - j - 1))
blanchet@41168
   575
            div !smt_weight_curve (!smt_max_index))
blanchet@41168
   576
  else
blanchet@41168
   577
    NONE
blanchet@41168
   578
blanchet@41168
   579
fun run_smt_solver auto name (params as {debug, verbose, overlord, ...})
blanchet@41168
   580
        minimize_command
blanchet@40983
   581
        ({state, subgoal, subgoal_count, facts, ...} : prover_problem) =
blanchet@36379
   582
  let
blanchet@40941
   583
    val (remote, suffix) =
blanchet@40941
   584
      case try (unprefix remote_prefix) name of
blanchet@40941
   585
        SOME suffix => (true, suffix)
blanchet@40941
   586
      | NONE => (false, name)
blanchet@40439
   587
    val repair_context =
blanchet@40941
   588
      Context.proof_map (SMT_Config.select_solver suffix)
blanchet@40941
   589
      #> Config.put SMT_Config.verbose debug
blanchet@41159
   590
      #> (if overlord then
blanchet@41159
   591
            Config.put SMT_Config.debug_files
blanchet@41159
   592
                       (overlord_file_location_for_prover name
blanchet@41159
   593
                        |> (fn (path, base) => path ^ "/" ^ base))
blanchet@41159
   594
          else
blanchet@41159
   595
            I)
blanchet@41168
   596
      #> Config.put SMT_Config.monomorph_limit (!smt_monomorph_limit)
blanchet@40439
   597
    val state = state |> Proof.map_context repair_context
blanchet@40668
   598
    val thy = Proof.theory_of state
blanchet@41168
   599
    val num_facts = length facts
blanchet@41168
   600
    val facts =
blanchet@41168
   601
      facts ~~ (0 upto num_facts - 1)
blanchet@41168
   602
      |> map (fn (fact, j) =>
blanchet@41168
   603
                 fact |> untranslated_fact
blanchet@41168
   604
                      |> apsnd (pair (smt_fact_weight j num_facts)
blanchet@41168
   605
                                o Thm.transfer thy))
blanchet@40181
   606
    val {outcome, used_facts, run_time_in_msecs} =
blanchet@40982
   607
      smt_filter_loop params remote state subgoal facts
blanchet@40723
   608
    val (chained_lemmas, other_lemmas) = split_used_facts (map fst used_facts)
blanchet@40669
   609
    val outcome = outcome |> Option.map failure_from_smt_failure
blanchet@40063
   610
    val message =
blanchet@40184
   611
      case outcome of
blanchet@40184
   612
        NONE =>
blanchet@40666
   613
        let
blanchet@41151
   614
          val (method, settings) =
blanchet@40693
   615
            if can_apply_metis debug state subgoal (map snd used_facts) then
blanchet@41151
   616
              ("metis", "")
blanchet@40693
   617
            else
blanchet@41151
   618
              ("smt", if suffix = SMT_Config.solver_of @{context} then ""
blanchet@41151
   619
                      else "smt_solver = " ^ maybe_quote suffix)
blanchet@40666
   620
        in
blanchet@40666
   621
          try_command_line (proof_banner auto)
blanchet@41151
   622
              (apply_on_subgoal settings subgoal subgoal_count ^
blanchet@41151
   623
               command_call method (map fst other_lemmas)) ^
blanchet@40723
   624
          minimize_line minimize_command
blanchet@41168
   625
                        (map fst (other_lemmas @ chained_lemmas)) ^
blanchet@41168
   626
          (if verbose then
blanchet@41168
   627
             "\nSMT solver real CPU time: " ^
blanchet@41168
   628
             string_from_time (Time.fromMilliseconds (the run_time_in_msecs)) ^
blanchet@41168
   629
             "."
blanchet@41168
   630
           else
blanchet@41168
   631
             "")
blanchet@40666
   632
        end
blanchet@40669
   633
      | SOME failure => string_for_failure "SMT solver" failure
blanchet@40063
   634
  in
blanchet@40666
   635
    {outcome = outcome, used_facts = map fst used_facts,
blanchet@40204
   636
     run_time_in_msecs = run_time_in_msecs, message = message}
blanchet@40063
   637
  end
blanchet@40063
   638
blanchet@40941
   639
fun get_prover ctxt auto name =
blanchet@40941
   640
  let val thy = ProofContext.theory_of ctxt in
blanchet@40941
   641
    if is_smt_prover ctxt name then
blanchet@40941
   642
      run_smt_solver auto name
blanchet@40941
   643
    else if member (op =) (available_atps thy) name then
blanchet@40941
   644
      run_atp auto name (get_atp thy name)
blanchet@40941
   645
    else
blanchet@40941
   646
      error ("No such prover: " ^ name ^ ".")
blanchet@40941
   647
  end
blanchet@40063
   648
blanchet@38023
   649
val setup =
blanchet@38023
   650
  dest_dir_setup
blanchet@38023
   651
  #> problem_prefix_setup
blanchet@39003
   652
  #> measure_run_time_setup
blanchet@38023
   653
wenzelm@28582
   654
end;