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(* Title: HOL/Tools/Sledgehammer/sledgehammer_mash.ML
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Author: Jasmin Blanchette, TU Muenchen
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Sledgehammer's machine-learning-based relevance filter (MaSh).
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*)
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signature SLEDGEHAMMER_MASH =
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sig
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type stature = ATP_Problem_Generate.stature
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type fact = Sledgehammer_Fact.fact
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type fact_override = Sledgehammer_Fact.fact_override
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type params = Sledgehammer_Provers.params
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type relevance_fudge = Sledgehammer_Provers.relevance_fudge
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type prover_result = Sledgehammer_Provers.prover_result
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val trace : bool Config.T
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val MaShN : string
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val mepoN : string
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val mashN : string
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val meshN : string
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val fact_filters : string list
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val escape_meta : string -> string
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val escape_metas : string list -> string
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val unescape_meta : string -> string
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val unescape_metas : string -> string list
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val extract_query : string -> string * string list
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val nickname_of : thm -> string
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val suggested_facts : string list -> ('a * thm) list -> ('a * thm) list
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val mesh_facts :
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int -> (('a * thm) list * ('a * thm) list) list -> ('a * thm) list
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val is_likely_tautology_or_too_meta : thm -> bool
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val theory_ord : theory * theory -> order
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val thm_ord : thm * thm -> order
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val features_of :
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Proof.context -> string -> theory -> stature -> term list -> string list
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val isabelle_dependencies_of : unit Symtab.table -> thm -> string list
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val goal_of_thm : theory -> thm -> thm
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val run_prover_for_mash :
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Proof.context -> params -> string -> fact list -> thm -> prover_result
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val mash_CLEAR : Proof.context -> unit
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val mash_ADD :
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Proof.context -> bool
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-> (string * string list * string list * string list) list -> unit
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val mash_QUERY :
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Proof.context -> bool -> int -> string list * string list -> string list
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val mash_unlearn : Proof.context -> unit
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val mash_could_suggest_facts : unit -> bool
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val mash_can_suggest_facts : Proof.context -> bool
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val mash_suggest_facts :
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Proof.context -> params -> string -> int -> term list -> term
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-> ('a * thm) list -> ('a * thm) list * ('a * thm) list
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val mash_learn_proof :
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Proof.context -> params -> string -> term -> ('a * thm) list -> thm list
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-> unit
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val mash_learn_thy :
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Proof.context -> params -> theory -> Time.time -> fact list -> string
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val mash_learn : Proof.context -> params -> unit
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val relevant_facts :
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Proof.context -> params -> string -> int -> fact_override -> term list
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-> term -> fact list -> fact list
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val kill_learners : unit -> unit
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val running_learners : unit -> unit
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end;
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structure Sledgehammer_MaSh : SLEDGEHAMMER_MASH =
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struct
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open ATP_Util
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open ATP_Problem_Generate
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open Sledgehammer_Util
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open Sledgehammer_Fact
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open Sledgehammer_Provers
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open Sledgehammer_Minimize
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open Sledgehammer_MePo
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val trace =
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Attrib.setup_config_bool @{binding sledgehammer_mash_trace} (K false)
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fun trace_msg ctxt msg = if Config.get ctxt trace then tracing (msg ()) else ()
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val MaShN = "MaSh"
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val mepoN = "mepo"
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val mashN = "mash"
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val meshN = "mesh"
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val fact_filters = [meshN, mepoN, mashN]
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fun mash_home () = getenv "MASH_HOME"
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fun mash_state_dir () =
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getenv "ISABELLE_HOME_USER" ^ "/mash"
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|> tap (Isabelle_System.mkdir o Path.explode)
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fun mash_state_path () = mash_state_dir () ^ "/state" |> Path.explode
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(*** Isabelle helpers ***)
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fun meta_char c =
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if Char.isAlphaNum c orelse c = #"_" orelse c = #"." orelse c = #"(" orelse
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c = #")" orelse c = #"," then
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String.str c
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else
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(* fixed width, in case more digits follow *)
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"\\" ^ stringN_of_int 3 (Char.ord c)
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fun unmeta_chars accum [] = String.implode (rev accum)
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| unmeta_chars accum (#"\\" :: d1 :: d2 :: d3 :: cs) =
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(case Int.fromString (String.implode [d1, d2, d3]) of
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SOME n => unmeta_chars (Char.chr n :: accum) cs
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| NONE => "" (* error *))
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| unmeta_chars _ (#"\\" :: _) = "" (* error *)
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| unmeta_chars accum (c :: cs) = unmeta_chars (c :: accum) cs
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val escape_meta = String.translate meta_char
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val escape_metas = map escape_meta #> space_implode " "
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val unescape_meta = String.explode #> unmeta_chars []
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val unescape_metas =
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space_explode " " #> filter_out (curry (op =) "") #> map unescape_meta
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fun extract_query line =
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case space_explode ":" line of
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[goal_name, suggs] => (unescape_meta goal_name, unescape_metas suggs)
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| _ => ("", [])
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fun parent_of_local_thm th =
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let
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val thy = th |> Thm.theory_of_thm
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val facts = thy |> Global_Theory.facts_of
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val space = facts |> Facts.space_of
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fun id_of s = #id (Name_Space.the_entry space s)
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fun max_id (s', _) (s, id) =
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let val id' = id_of s' in if id > id' then (s, id) else (s', id') end
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in ("", ~1) |> Facts.fold_static max_id facts |> fst end
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val local_prefix = "local" ^ Long_Name.separator
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fun nickname_of th =
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let val hint = Thm.get_name_hint th in
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(* FIXME: There must be a better way to detect local facts. *)
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case try (unprefix local_prefix) hint of
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SOME suff =>
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parent_of_local_thm th ^ Long_Name.separator ^ Long_Name.separator ^ suff
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| NONE => hint
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end
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fun suggested_facts suggs facts =
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let
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fun add_fact (fact as (_, th)) = Symtab.default (nickname_of th, fact)
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val tab = Symtab.empty |> fold add_fact facts
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in map_filter (Symtab.lookup tab) suggs end
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(* Ad hoc score function roughly based on Blanchette's Ringberg 2011 data. *)
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fun score x = Math.pow (1.5, 15.5 - 0.05 * Real.fromInt x) + 15.0
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fun sum_sq_avg [] = 0
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| sum_sq_avg xs =
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Real.ceil (100000.0 * fold (curry (op +) o score) xs 0.0) div length xs
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fun mesh_facts max_facts [(selected, unknown)] =
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take max_facts selected @ take (max_facts - length selected) unknown
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| mesh_facts max_facts mess =
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let
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val mess = mess |> map (apfst (`length))
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val fact_eq = Thm.eq_thm o pairself snd
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fun score_in fact ((sel_len, sels), unks) =
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case find_index (curry fact_eq fact) sels of
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~1 => (case find_index (curry fact_eq fact) unks of
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~1 => SOME sel_len
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| _ => NONE)
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| j => SOME j
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fun score_of fact = mess |> map_filter (score_in fact) |> sum_sq_avg
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val facts = fold (union fact_eq o take max_facts o snd o fst) mess []
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in
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facts |> map (`score_of) |> sort (int_ord o swap o pairself fst)
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|> map snd |> take max_facts
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end
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val thy_feature_prefix = "y_"
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val thy_feature_name_of = prefix thy_feature_prefix
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val const_name_of = prefix const_prefix
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val type_name_of = prefix type_const_prefix
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val class_name_of = prefix class_prefix
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fun is_likely_tautology_or_too_meta th =
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let
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val is_boring_const = member (op =) atp_widely_irrelevant_consts
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fun is_boring_bool t =
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not (exists_Const (not o is_boring_const o fst) t) orelse
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exists_type (exists_subtype (curry (op =) @{typ prop})) t
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fun is_boring_prop (@{const Trueprop} $ t) = is_boring_bool t
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| is_boring_prop (@{const "==>"} $ t $ u) =
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is_boring_prop t andalso is_boring_prop u
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| is_boring_prop (Const (@{const_name all}, _) $ (Abs (_, _, t)) $ u) =
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is_boring_prop t andalso is_boring_prop u
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| is_boring_prop (Const (@{const_name "=="}, _) $ t $ u) =
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is_boring_bool t andalso is_boring_bool u
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| is_boring_prop _ = true
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in
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is_boring_prop (prop_of th) andalso not (Thm.eq_thm_prop (@{thm ext}, th))
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end
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fun theory_ord p =
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if Theory.eq_thy p then
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EQUAL
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else if Theory.subthy p then
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LESS
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else if Theory.subthy (swap p) then
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GREATER
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else case int_ord (pairself (length o Theory.ancestors_of) p) of
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EQUAL => string_ord (pairself Context.theory_name p)
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| order => order
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val thm_ord = theory_ord o pairself theory_of_thm
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val bad_types = [@{type_name prop}, @{type_name bool}, @{type_name fun}]
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fun interesting_terms_types_and_classes ctxt prover term_max_depth
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type_max_depth ts =
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let
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fun is_bad_const (x as (s, _)) args =
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member (op =) atp_logical_consts s orelse
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fst (is_built_in_const_for_prover ctxt prover x args)
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fun add_classes @{sort type} = I
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| add_classes S = union (op =) (map class_name_of S)
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fun do_add_type (Type (s, Ts)) =
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(not (member (op =) bad_types s) ? insert (op =) (type_name_of s))
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#> fold do_add_type Ts
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blanchet@49319
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| do_add_type (TFree (_, S)) = add_classes S
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blanchet@49319
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| do_add_type (TVar (_, S)) = add_classes S
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fun add_type T = type_max_depth >= 0 ? do_add_type T
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fun mk_app s args =
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if member (op <>) args "" then s ^ "(" ^ space_implode "," args ^ ")"
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else s
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fun patternify ~1 _ = ""
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| patternify depth t =
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case strip_comb t of
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(Const (s, _), args) =>
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mk_app (const_name_of s) (map (patternify (depth - 1)) args)
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| _ => ""
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fun add_term_patterns ~1 _ = I
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| add_term_patterns depth t =
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insert (op =) (patternify depth t)
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#> add_term_patterns (depth - 1) t
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val add_term = add_term_patterns term_max_depth
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fun add_patterns t =
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let val (head, args) = strip_comb t in
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(case head of
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Const (x as (_, T)) =>
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not (is_bad_const x args) ? (add_term t #> add_type T)
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| Free (_, T) => add_type T
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| Var (_, T) => add_type T
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| Abs (_, T, body) => add_type T #> add_patterns body
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| _ => I)
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#> fold add_patterns args
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end
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in [] |> fold add_patterns ts end
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fun is_exists (s, _) = (s = @{const_name Ex} orelse s = @{const_name Ex1})
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val term_max_depth = 1
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val type_max_depth = 1
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(* TODO: Generate type classes for types? *)
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blanchet@49400
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fun features_of ctxt prover thy (scope, status) ts =
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blanchet@49318
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thy_feature_name_of (Context.theory_name thy) ::
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blanchet@49333
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interesting_terms_types_and_classes ctxt prover term_max_depth type_max_depth
|
blanchet@49333
|
267 |
ts
|
blanchet@49347
|
268 |
|> forall is_lambda_free ts ? cons "no_lams"
|
blanchet@49347
|
269 |
|> forall (not o exists_Const is_exists) ts ? cons "no_skos"
|
blanchet@49400
|
270 |
|> scope <> Global ? cons "local"
|
blanchet@49317
|
271 |
|> (case status of
|
blanchet@49317
|
272 |
General => I
|
blanchet@49317
|
273 |
| Induction => cons "induction"
|
blanchet@49317
|
274 |
| Intro => cons "intro"
|
blanchet@49317
|
275 |
| Inductive => cons "inductive"
|
blanchet@49317
|
276 |
| Elim => cons "elim"
|
blanchet@49317
|
277 |
| Simp => cons "simp"
|
blanchet@49317
|
278 |
| Def => cons "def")
|
blanchet@49266
|
279 |
|
blanchet@49341
|
280 |
fun isabelle_dependencies_of all_facts = thms_in_proof (SOME all_facts)
|
blanchet@49266
|
281 |
|
blanchet@49266
|
282 |
val freezeT = Type.legacy_freeze_type
|
blanchet@49266
|
283 |
|
blanchet@49266
|
284 |
fun freeze (t $ u) = freeze t $ freeze u
|
blanchet@49266
|
285 |
| freeze (Abs (s, T, t)) = Abs (s, freezeT T, freeze t)
|
blanchet@49266
|
286 |
| freeze (Var ((s, _), T)) = Free (s, freezeT T)
|
blanchet@49266
|
287 |
| freeze (Const (s, T)) = Const (s, freezeT T)
|
blanchet@49266
|
288 |
| freeze (Free (s, T)) = Free (s, freezeT T)
|
blanchet@49266
|
289 |
| freeze t = t
|
blanchet@49266
|
290 |
|
blanchet@49266
|
291 |
fun goal_of_thm thy = prop_of #> freeze #> cterm_of thy #> Goal.init
|
blanchet@49266
|
292 |
|
blanchet@49336
|
293 |
fun run_prover_for_mash ctxt params prover facts goal =
|
blanchet@49266
|
294 |
let
|
blanchet@49266
|
295 |
val problem =
|
blanchet@49266
|
296 |
{state = Proof.init ctxt, goal = goal, subgoal = 1, subgoal_count = 1,
|
blanchet@49304
|
297 |
facts = facts |> map (apfst (apfst (fn name => name ())))
|
blanchet@49333
|
298 |
|> map Untranslated_Fact}
|
blanchet@49336
|
299 |
val prover = get_minimizing_prover ctxt Normal (K ()) prover
|
blanchet@49266
|
300 |
in prover params (K (K (K ""))) problem end
|
blanchet@49266
|
301 |
|
blanchet@49266
|
302 |
|
blanchet@49317
|
303 |
(*** Low-level communication with MaSh ***)
|
blanchet@49317
|
304 |
|
blanchet@49338
|
305 |
fun write_file (xs, f) file =
|
blanchet@49333
|
306 |
let val path = Path.explode file in
|
blanchet@49338
|
307 |
File.write path "";
|
blanchet@49338
|
308 |
xs |> chunk_list 500
|
blanchet@49338
|
309 |
|> List.app (File.append path o space_implode "" o map f)
|
blanchet@49333
|
310 |
end
|
blanchet@49331
|
311 |
|
blanchet@49331
|
312 |
fun mash_info overlord =
|
blanchet@49331
|
313 |
if overlord then (getenv "ISABELLE_HOME_USER", "")
|
blanchet@49331
|
314 |
else (getenv "ISABELLE_TMP", serial_string ())
|
blanchet@49331
|
315 |
|
blanchet@49397
|
316 |
fun and_rm_files overlord flags files =
|
blanchet@49397
|
317 |
if overlord then
|
blanchet@49397
|
318 |
""
|
blanchet@49397
|
319 |
else
|
blanchet@49397
|
320 |
" && rm -f" ^ flags ^ " -- " ^
|
blanchet@49397
|
321 |
space_implode " " (map File.shell_quote files)
|
blanchet@49397
|
322 |
|
blanchet@49397
|
323 |
fun run_mash ctxt overlord (temp_dir, serial) async core =
|
blanchet@49326
|
324 |
let
|
blanchet@49331
|
325 |
val log_file = temp_dir ^ "/mash_log" ^ serial
|
blanchet@49331
|
326 |
val err_file = temp_dir ^ "/mash_err" ^ serial
|
blanchet@49326
|
327 |
val command =
|
blanchet@49397
|
328 |
"(" ^ mash_home () ^ "/mash --quiet --outputDir " ^ mash_state_dir () ^
|
blanchet@49397
|
329 |
" --log " ^ log_file ^ " " ^ core ^ ") 2>&1 > " ^ err_file ^
|
blanchet@49397
|
330 |
and_rm_files overlord "" [log_file, err_file] ^
|
blanchet@49397
|
331 |
(if async then " &" else "")
|
blanchet@49331
|
332 |
in
|
blanchet@49397
|
333 |
trace_msg ctxt (fn () =>
|
blanchet@49397
|
334 |
(if async then "Launching " else "Running ") ^ command);
|
blanchet@49338
|
335 |
write_file ([], K "") log_file;
|
blanchet@49338
|
336 |
write_file ([], K "") err_file;
|
blanchet@49347
|
337 |
Isabelle_System.bash command;
|
blanchet@49397
|
338 |
if not async then trace_msg ctxt (K "Done") else ()
|
blanchet@49331
|
339 |
end
|
blanchet@49326
|
340 |
|
blanchet@49398
|
341 |
fun run_mash_commands ctxt overlord save max_suggs write_cmds read_suggs =
|
blanchet@49331
|
342 |
let
|
blanchet@49331
|
343 |
val info as (temp_dir, serial) = mash_info overlord
|
blanchet@49333
|
344 |
val sugg_file = temp_dir ^ "/mash_suggs" ^ serial
|
blanchet@49331
|
345 |
val cmd_file = temp_dir ^ "/mash_commands" ^ serial
|
blanchet@49331
|
346 |
in
|
blanchet@49338
|
347 |
write_file ([], K "") sugg_file;
|
blanchet@49331
|
348 |
write_file write_cmds cmd_file;
|
blanchet@49398
|
349 |
run_mash ctxt overlord info false
|
blanchet@49333
|
350 |
("--inputFile " ^ cmd_file ^ " --predictions " ^ sugg_file ^
|
blanchet@49333
|
351 |
" --numberOfPredictions " ^ string_of_int max_suggs ^
|
blanchet@49397
|
352 |
(if save then " --saveModel" else "") ^
|
blanchet@49397
|
353 |
(and_rm_files overlord "" [sugg_file, cmd_file]));
|
blanchet@49333
|
354 |
read_suggs (fn () => File.read_lines (Path.explode sugg_file))
|
blanchet@49331
|
355 |
end
|
blanchet@49331
|
356 |
|
blanchet@49331
|
357 |
fun str_of_update (name, parents, feats, deps) =
|
blanchet@49331
|
358 |
"! " ^ escape_meta name ^ ": " ^ escape_metas parents ^ "; " ^
|
blanchet@49326
|
359 |
escape_metas feats ^ "; " ^ escape_metas deps ^ "\n"
|
blanchet@49326
|
360 |
|
blanchet@49331
|
361 |
fun str_of_query (parents, feats) =
|
blanchet@49331
|
362 |
"? " ^ escape_metas parents ^ "; " ^ escape_metas feats
|
blanchet@49331
|
363 |
|
blanchet@49347
|
364 |
fun mash_CLEAR ctxt =
|
blanchet@49329
|
365 |
let val path = mash_state_dir () |> Path.explode in
|
blanchet@49347
|
366 |
trace_msg ctxt (K "MaSh CLEAR");
|
blanchet@49324
|
367 |
File.fold_dir (fn file => fn () =>
|
blanchet@49324
|
368 |
File.rm (Path.append path (Path.basic file)))
|
blanchet@49324
|
369 |
path ()
|
blanchet@49324
|
370 |
end
|
blanchet@49317
|
371 |
|
blanchet@49331
|
372 |
fun mash_ADD _ _ [] = ()
|
blanchet@49331
|
373 |
| mash_ADD ctxt overlord upds =
|
blanchet@49331
|
374 |
(trace_msg ctxt (fn () => "MaSh ADD " ^
|
blanchet@49331
|
375 |
elide_string 1000 (space_implode " " (map #1 upds)));
|
blanchet@49398
|
376 |
run_mash_commands ctxt overlord true 0 (upds, str_of_update) (K ()))
|
blanchet@49317
|
377 |
|
blanchet@49333
|
378 |
fun mash_QUERY ctxt overlord max_suggs (query as (_, feats)) =
|
blanchet@49329
|
379 |
(trace_msg ctxt (fn () => "MaSh QUERY " ^ space_implode " " feats);
|
blanchet@49398
|
380 |
run_mash_commands ctxt overlord false max_suggs
|
blanchet@49338
|
381 |
([query], str_of_query)
|
blanchet@49333
|
382 |
(fn suggs => snd (extract_query (List.last (suggs ()))))
|
blanchet@49326
|
383 |
handle List.Empty => [])
|
blanchet@49317
|
384 |
|
blanchet@49317
|
385 |
|
blanchet@49266
|
386 |
(*** High-level communication with MaSh ***)
|
blanchet@49266
|
387 |
|
blanchet@49336
|
388 |
fun try_graph ctxt when def f =
|
blanchet@49336
|
389 |
f ()
|
blanchet@49336
|
390 |
handle Graph.CYCLES (cycle :: _) =>
|
blanchet@49336
|
391 |
(trace_msg ctxt (fn () =>
|
blanchet@49336
|
392 |
"Cycle involving " ^ commas cycle ^ " when " ^ when); def)
|
blanchet@49336
|
393 |
| Graph.UNDEF name =>
|
blanchet@49336
|
394 |
(trace_msg ctxt (fn () =>
|
blanchet@49336
|
395 |
"Unknown fact " ^ quote name ^ " when " ^ when); def)
|
blanchet@49336
|
396 |
|
blanchet@49316
|
397 |
type mash_state =
|
blanchet@49331
|
398 |
{thys : bool Symtab.table,
|
blanchet@49331
|
399 |
fact_graph : unit Graph.T}
|
blanchet@49264
|
400 |
|
blanchet@49331
|
401 |
val empty_state = {thys = Symtab.empty, fact_graph = Graph.empty}
|
blanchet@49316
|
402 |
|
blanchet@49316
|
403 |
local
|
blanchet@49316
|
404 |
|
blanchet@49336
|
405 |
fun mash_load _ (state as (true, _)) = state
|
blanchet@49336
|
406 |
| mash_load ctxt _ =
|
blanchet@49324
|
407 |
let val path = mash_state_path () in
|
blanchet@49317
|
408 |
(true,
|
blanchet@49317
|
409 |
case try File.read_lines path of
|
blanchet@49331
|
410 |
SOME (comp_thys :: incomp_thys :: fact_lines) =>
|
blanchet@49317
|
411 |
let
|
blanchet@49331
|
412 |
fun add_thy comp thy = Symtab.update (thy, comp)
|
blanchet@49337
|
413 |
fun add_edge_to name parent =
|
blanchet@49337
|
414 |
Graph.default_node (parent, ())
|
blanchet@49337
|
415 |
#> Graph.add_edge (parent, name)
|
blanchet@49331
|
416 |
fun add_fact_line line =
|
blanchet@49331
|
417 |
case extract_query line of
|
blanchet@49331
|
418 |
("", _) => I (* shouldn't happen *)
|
blanchet@49331
|
419 |
| (name, parents) =>
|
blanchet@49331
|
420 |
Graph.default_node (name, ())
|
blanchet@49337
|
421 |
#> fold (add_edge_to name) parents
|
blanchet@49331
|
422 |
val thys =
|
blanchet@49331
|
423 |
Symtab.empty |> fold (add_thy true) (unescape_metas comp_thys)
|
blanchet@49331
|
424 |
|> fold (add_thy false) (unescape_metas incomp_thys)
|
blanchet@49336
|
425 |
val fact_graph =
|
blanchet@49337
|
426 |
try_graph ctxt "loading state" Graph.empty (fn () =>
|
blanchet@49336
|
427 |
Graph.empty |> fold add_fact_line fact_lines)
|
blanchet@49331
|
428 |
in {thys = thys, fact_graph = fact_graph} end
|
blanchet@49319
|
429 |
| _ => empty_state)
|
blanchet@49317
|
430 |
end
|
blanchet@49316
|
431 |
|
blanchet@49331
|
432 |
fun mash_save ({thys, fact_graph, ...} : mash_state) =
|
blanchet@49316
|
433 |
let
|
blanchet@49324
|
434 |
val path = mash_state_path ()
|
blanchet@49331
|
435 |
val thys = Symtab.dest thys
|
blanchet@49333
|
436 |
val line_for_thys = escape_metas o AList.find (op =) thys
|
blanchet@49333
|
437 |
fun fact_line_for name parents =
|
blanchet@49333
|
438 |
escape_meta name ^ ": " ^ escape_metas parents
|
blanchet@49331
|
439 |
val append_fact = File.append path o suffix "\n" oo fact_line_for
|
blanchet@49316
|
440 |
in
|
blanchet@49331
|
441 |
File.write path (line_for_thys true ^ "\n" ^ line_for_thys false ^ "\n");
|
blanchet@49331
|
442 |
Graph.fold (fn (name, ((), (parents, _))) => fn () =>
|
blanchet@49331
|
443 |
append_fact name (Graph.Keys.dest parents))
|
blanchet@49331
|
444 |
fact_graph ()
|
blanchet@49316
|
445 |
end
|
blanchet@49316
|
446 |
|
blanchet@49317
|
447 |
val global_state =
|
blanchet@49396
|
448 |
Synchronized.var "Sledgehammer_MaSh.global_state" (false, empty_state)
|
blanchet@49316
|
449 |
|
blanchet@49316
|
450 |
in
|
blanchet@49316
|
451 |
|
blanchet@49336
|
452 |
fun mash_map ctxt f =
|
blanchet@49336
|
453 |
Synchronized.change global_state (mash_load ctxt ##> (f #> tap mash_save))
|
blanchet@49316
|
454 |
|
blanchet@49336
|
455 |
fun mash_get ctxt =
|
blanchet@49336
|
456 |
Synchronized.change_result global_state (mash_load ctxt #> `snd)
|
blanchet@49317
|
457 |
|
blanchet@49347
|
458 |
fun mash_unlearn ctxt =
|
blanchet@49317
|
459 |
Synchronized.change global_state (fn _ =>
|
blanchet@49347
|
460 |
(mash_CLEAR ctxt; File.write (mash_state_path ()) "";
|
blanchet@49323
|
461 |
(true, empty_state)))
|
blanchet@49316
|
462 |
|
blanchet@49316
|
463 |
end
|
blanchet@49316
|
464 |
|
blanchet@49333
|
465 |
fun mash_could_suggest_facts () = mash_home () <> ""
|
blanchet@49336
|
466 |
fun mash_can_suggest_facts ctxt =
|
blanchet@49336
|
467 |
not (Graph.is_empty (#fact_graph (mash_get ctxt)))
|
blanchet@49264
|
468 |
|
blanchet@49347
|
469 |
fun parents_wrt_facts facts fact_graph =
|
blanchet@49331
|
470 |
let
|
blanchet@49393
|
471 |
val facts = [] |> fold (cons o nickname_of o snd) facts
|
blanchet@49345
|
472 |
val tab = Symtab.empty |> fold (fn name => Symtab.update (name, ())) facts
|
blanchet@49392
|
473 |
fun insert_not_seen seen name =
|
blanchet@49392
|
474 |
not (member (op =) seen name) ? insert (op =) name
|
blanchet@49393
|
475 |
fun parents_of _ parents [] = parents
|
blanchet@49392
|
476 |
| parents_of seen parents (name :: names) =
|
blanchet@49347
|
477 |
if Symtab.defined tab name then
|
blanchet@49392
|
478 |
parents_of (name :: seen) (name :: parents) names
|
blanchet@49347
|
479 |
else
|
blanchet@49392
|
480 |
parents_of (name :: seen) parents
|
blanchet@49392
|
481 |
(Graph.Keys.fold (insert_not_seen seen)
|
blanchet@49392
|
482 |
(Graph.imm_preds fact_graph name) names)
|
blanchet@49392
|
483 |
in parents_of [] [] (Graph.maximals fact_graph) end
|
blanchet@49331
|
484 |
|
blanchet@49333
|
485 |
(* Generate more suggestions than requested, because some might be thrown out
|
blanchet@49333
|
486 |
later for various reasons and "meshing" gives better results with some
|
blanchet@49333
|
487 |
slack. *)
|
blanchet@49333
|
488 |
fun max_suggs_of max_facts = max_facts + Int.min (200, max_facts)
|
blanchet@49333
|
489 |
|
blanchet@49335
|
490 |
fun is_fact_in_graph fact_graph (_, th) =
|
blanchet@49393
|
491 |
can (Graph.get_node fact_graph) (nickname_of th)
|
blanchet@49335
|
492 |
|
blanchet@49333
|
493 |
fun mash_suggest_facts ctxt ({overlord, ...} : params) prover max_facts hyp_ts
|
blanchet@49333
|
494 |
concl_t facts =
|
blanchet@49316
|
495 |
let
|
blanchet@49317
|
496 |
val thy = Proof_Context.theory_of ctxt
|
blanchet@49336
|
497 |
val fact_graph = #fact_graph (mash_get ctxt)
|
blanchet@49347
|
498 |
val parents = parents_wrt_facts facts fact_graph
|
blanchet@49400
|
499 |
val feats = features_of ctxt prover thy (Local, General) (concl_t :: hyp_ts)
|
blanchet@49333
|
500 |
val suggs =
|
blanchet@49335
|
501 |
if Graph.is_empty fact_graph then []
|
blanchet@49335
|
502 |
else mash_QUERY ctxt overlord (max_suggs_of max_facts) (parents, feats)
|
blanchet@49335
|
503 |
val selected = facts |> suggested_facts suggs
|
blanchet@49335
|
504 |
val unknown = facts |> filter_out (is_fact_in_graph fact_graph)
|
blanchet@49335
|
505 |
in (selected, unknown) end
|
blanchet@49264
|
506 |
|
blanchet@49331
|
507 |
fun add_thys_for thy =
|
blanchet@49331
|
508 |
let fun add comp thy = Symtab.update (Context.theory_name thy, comp) in
|
blanchet@49331
|
509 |
add false thy #> fold (add true) (Theory.ancestors_of thy)
|
blanchet@49331
|
510 |
end
|
blanchet@49319
|
511 |
|
blanchet@49331
|
512 |
fun update_fact_graph ctxt (name, parents, feats, deps) (upds, graph) =
|
blanchet@49331
|
513 |
let
|
blanchet@49331
|
514 |
fun maybe_add_from from (accum as (parents, graph)) =
|
blanchet@49336
|
515 |
try_graph ctxt "updating graph" accum (fn () =>
|
blanchet@49336
|
516 |
(from :: parents, Graph.add_edge_acyclic (from, name) graph))
|
blanchet@49336
|
517 |
val graph = graph |> Graph.default_node (name, ())
|
blanchet@49331
|
518 |
val (parents, graph) = ([], graph) |> fold maybe_add_from parents
|
blanchet@49331
|
519 |
val (deps, graph) = ([], graph) |> fold maybe_add_from deps
|
blanchet@49331
|
520 |
in ((name, parents, feats, deps) :: upds, graph) end
|
blanchet@49321
|
521 |
|
blanchet@49399
|
522 |
val learn_timeout_slack = 2.0
|
blanchet@49333
|
523 |
|
blanchet@49399
|
524 |
fun launch_thread timeout task =
|
blanchet@49398
|
525 |
let
|
blanchet@49399
|
526 |
val hard_timeout = time_mult learn_timeout_slack timeout
|
blanchet@49399
|
527 |
val birth_time = Time.now ()
|
blanchet@49399
|
528 |
val death_time = Time.+ (birth_time, hard_timeout)
|
blanchet@49399
|
529 |
val desc = ("machine learner for Sledgehammer", "")
|
blanchet@49399
|
530 |
in Async_Manager.launch MaShN birth_time death_time desc task end
|
blanchet@49399
|
531 |
|
blanchet@49399
|
532 |
fun mash_learn_proof ctxt ({overlord, timeout, ...} : params) prover t facts
|
blanchet@49399
|
533 |
used_ths =
|
blanchet@49399
|
534 |
if is_smt_prover ctxt prover then
|
blanchet@49399
|
535 |
()
|
blanchet@49399
|
536 |
else
|
blanchet@49399
|
537 |
launch_thread timeout
|
blanchet@49399
|
538 |
(fn () =>
|
blanchet@49399
|
539 |
let
|
blanchet@49399
|
540 |
val thy = Proof_Context.theory_of ctxt
|
blanchet@49399
|
541 |
val name = timestamp () ^ " " ^ serial_string () (* freshish *)
|
blanchet@49400
|
542 |
val feats = features_of ctxt prover thy (Local, General) [t]
|
blanchet@49399
|
543 |
val deps = used_ths |> map nickname_of
|
blanchet@49399
|
544 |
in
|
blanchet@49399
|
545 |
mash_map ctxt (fn {thys, fact_graph} =>
|
blanchet@49399
|
546 |
let
|
blanchet@49399
|
547 |
val parents = parents_wrt_facts facts fact_graph
|
blanchet@49399
|
548 |
val upds = [(name, parents, feats, deps)]
|
blanchet@49399
|
549 |
val (upds, fact_graph) =
|
blanchet@49399
|
550 |
([], fact_graph) |> fold (update_fact_graph ctxt) upds
|
blanchet@49399
|
551 |
in
|
blanchet@49399
|
552 |
mash_ADD ctxt overlord upds;
|
blanchet@49399
|
553 |
{thys = thys, fact_graph = fact_graph}
|
blanchet@49399
|
554 |
end);
|
blanchet@49399
|
555 |
(true, "")
|
blanchet@49399
|
556 |
end)
|
blanchet@49398
|
557 |
|
blanchet@49347
|
558 |
(* Too many dependencies is a sign that a decision procedure is at work. There
|
blanchet@49347
|
559 |
isn't much too learn from such proofs. *)
|
blanchet@49347
|
560 |
val max_dependencies = 10
|
blanchet@49399
|
561 |
val pass1_learn_timeout_factor = 0.75
|
blanchet@49347
|
562 |
|
blanchet@49333
|
563 |
(* The timeout is understood in a very slack fashion. *)
|
blanchet@49334
|
564 |
fun mash_learn_thy ctxt ({provers, verbose, overlord, ...} : params) thy timeout
|
blanchet@49334
|
565 |
facts =
|
blanchet@49319
|
566 |
let
|
blanchet@49333
|
567 |
val timer = Timer.startRealTimer ()
|
blanchet@49333
|
568 |
val prover = hd provers
|
blanchet@49333
|
569 |
fun timed_out frac =
|
blanchet@49333
|
570 |
Time.> (Timer.checkRealTimer timer, time_mult frac timeout)
|
blanchet@49336
|
571 |
val {fact_graph, ...} = mash_get ctxt
|
blanchet@49335
|
572 |
val new_facts =
|
blanchet@49335
|
573 |
facts |> filter_out (is_fact_in_graph fact_graph)
|
blanchet@49335
|
574 |
|> sort (thm_ord o pairself snd)
|
blanchet@49323
|
575 |
in
|
blanchet@49323
|
576 |
if null new_facts then
|
blanchet@49334
|
577 |
""
|
blanchet@49323
|
578 |
else
|
blanchet@49319
|
579 |
let
|
blanchet@49323
|
580 |
val ths = facts |> map snd
|
blanchet@49330
|
581 |
val all_names =
|
blanchet@49339
|
582 |
ths |> filter_out is_likely_tautology_or_too_meta
|
blanchet@49393
|
583 |
|> map (rpair () o nickname_of)
|
blanchet@49331
|
584 |
|> Symtab.make
|
blanchet@49347
|
585 |
fun trim_deps deps = if length deps > max_dependencies then [] else deps
|
blanchet@49333
|
586 |
fun do_fact _ (accum as (_, true)) = accum
|
blanchet@49400
|
587 |
| do_fact ((_, stature), th) ((parents, upds), false) =
|
blanchet@49333
|
588 |
let
|
blanchet@49393
|
589 |
val name = nickname_of th
|
blanchet@49347
|
590 |
val feats =
|
blanchet@49400
|
591 |
features_of ctxt prover (theory_of_thm th) stature [prop_of th]
|
blanchet@49347
|
592 |
val deps = isabelle_dependencies_of all_names th |> trim_deps
|
blanchet@49333
|
593 |
val upd = (name, parents, feats, deps)
|
blanchet@49333
|
594 |
in (([name], upd :: upds), timed_out pass1_learn_timeout_factor) end
|
blanchet@49347
|
595 |
val parents = parents_wrt_facts facts fact_graph
|
blanchet@49333
|
596 |
val ((_, upds), _) =
|
blanchet@49333
|
597 |
((parents, []), false) |> fold do_fact new_facts |>> apsnd rev
|
blanchet@49333
|
598 |
val n = length upds
|
blanchet@49331
|
599 |
fun trans {thys, fact_graph} =
|
blanchet@49331
|
600 |
let
|
blanchet@49331
|
601 |
val (upds, fact_graph) =
|
blanchet@49331
|
602 |
([], fact_graph) |> fold (update_fact_graph ctxt) upds
|
blanchet@49331
|
603 |
in
|
blanchet@49404
|
604 |
(mash_ADD ctxt overlord (rev upds);
|
blanchet@49398
|
605 |
{thys = thys |> add_thys_for thy, fact_graph = fact_graph})
|
blanchet@49331
|
606 |
end
|
blanchet@49333
|
607 |
in
|
blanchet@49336
|
608 |
mash_map ctxt trans;
|
blanchet@49334
|
609 |
if verbose then
|
blanchet@49398
|
610 |
"Learned " ^ string_of_int n ^ " proof" ^ plural_s n ^
|
blanchet@49334
|
611 |
(if verbose then
|
blanchet@49334
|
612 |
" in " ^ string_from_time (Timer.checkRealTimer timer)
|
blanchet@49334
|
613 |
else
|
blanchet@49334
|
614 |
"") ^ "."
|
blanchet@49334
|
615 |
else
|
blanchet@49334
|
616 |
""
|
blanchet@49333
|
617 |
end
|
blanchet@49323
|
618 |
end
|
blanchet@49319
|
619 |
|
blanchet@49398
|
620 |
fun mash_learn ctxt params =
|
blanchet@49331
|
621 |
let
|
blanchet@49331
|
622 |
val thy = Proof_Context.theory_of ctxt
|
blanchet@49398
|
623 |
val _ = Output.urgent_message "MaShing..."
|
blanchet@49398
|
624 |
val css_table = Sledgehammer_Fact.clasimpset_rule_table_of ctxt
|
blanchet@49398
|
625 |
val facts = all_facts_of thy css_table
|
blanchet@49331
|
626 |
in
|
blanchet@49398
|
627 |
mash_learn_thy ctxt params thy infinite_timeout facts
|
blanchet@49398
|
628 |
|> (fn "" => "Learned nothing." | msg => msg)
|
blanchet@49398
|
629 |
|> Output.urgent_message
|
blanchet@49331
|
630 |
end
|
blanchet@49264
|
631 |
|
blanchet@49333
|
632 |
(* The threshold should be large enough so that MaSh doesn't kick in for Auto
|
blanchet@49333
|
633 |
Sledgehammer and Try. *)
|
blanchet@49333
|
634 |
val min_secs_for_learning = 15
|
blanchet@49333
|
635 |
|
blanchet@49336
|
636 |
fun relevant_facts ctxt (params as {learn, fact_filter, timeout, ...}) prover
|
blanchet@49336
|
637 |
max_facts ({add, only, ...} : fact_override) hyp_ts concl_t facts =
|
blanchet@49329
|
638 |
if not (subset (op =) (the_list fact_filter, fact_filters)) then
|
blanchet@49329
|
639 |
error ("Unknown fact filter: " ^ quote (the fact_filter) ^ ".")
|
blanchet@49329
|
640 |
else if only then
|
blanchet@49304
|
641 |
facts
|
blanchet@49336
|
642 |
else if max_facts <= 0 orelse null facts then
|
blanchet@49303
|
643 |
[]
|
blanchet@49303
|
644 |
else
|
blanchet@49303
|
645 |
let
|
blanchet@49333
|
646 |
val thy = Proof_Context.theory_of ctxt
|
blanchet@49342
|
647 |
fun maybe_learn () =
|
blanchet@49399
|
648 |
if learn andalso not (Async_Manager.has_running_threads MaShN) andalso
|
blanchet@49399
|
649 |
Time.toSeconds timeout >= min_secs_for_learning then
|
blanchet@49399
|
650 |
let val timeout = time_mult learn_timeout_slack timeout in
|
blanchet@49399
|
651 |
launch_thread timeout
|
blanchet@49399
|
652 |
(fn () => (true, mash_learn_thy ctxt params thy timeout facts))
|
blanchet@49334
|
653 |
end
|
blanchet@49333
|
654 |
else
|
blanchet@49333
|
655 |
()
|
blanchet@49329
|
656 |
val fact_filter =
|
blanchet@49329
|
657 |
case fact_filter of
|
blanchet@49394
|
658 |
SOME ff => (() |> ff <> mepoN ? maybe_learn; ff)
|
blanchet@49333
|
659 |
| NONE =>
|
blanchet@49401
|
660 |
if is_smt_prover ctxt prover then mepoN
|
blanchet@49401
|
661 |
else if mash_can_suggest_facts ctxt then (maybe_learn (); meshN)
|
blanchet@49394
|
662 |
else if mash_could_suggest_facts () then (maybe_learn (); mepoN)
|
blanchet@49394
|
663 |
else mepoN
|
blanchet@49303
|
664 |
val add_ths = Attrib.eval_thms ctxt add
|
blanchet@49307
|
665 |
fun prepend_facts ths accepts =
|
blanchet@49303
|
666 |
((facts |> filter (member Thm.eq_thm_prop ths o snd)) @
|
blanchet@49307
|
667 |
(accepts |> filter_out (member Thm.eq_thm_prop ths o snd)))
|
blanchet@49308
|
668 |
|> take max_facts
|
blanchet@49329
|
669 |
fun iter () =
|
blanchet@49313
|
670 |
iterative_relevant_facts ctxt params prover max_facts NONE hyp_ts
|
blanchet@49313
|
671 |
concl_t facts
|
blanchet@49329
|
672 |
fun mash () =
|
blanchet@49335
|
673 |
mash_suggest_facts ctxt params prover max_facts hyp_ts concl_t facts
|
blanchet@49329
|
674 |
val mess =
|
blanchet@49335
|
675 |
[] |> (if fact_filter <> mashN then cons (iter (), []) else I)
|
blanchet@49394
|
676 |
|> (if fact_filter <> mepoN then cons (mash ()) else I)
|
blanchet@49303
|
677 |
in
|
blanchet@49328
|
678 |
mesh_facts max_facts mess
|
blanchet@49303
|
679 |
|> not (null add_ths) ? prepend_facts add_ths
|
blanchet@49303
|
680 |
end
|
blanchet@49303
|
681 |
|
blanchet@49334
|
682 |
fun kill_learners () = Async_Manager.kill_threads MaShN "learner"
|
blanchet@49334
|
683 |
fun running_learners () = Async_Manager.running_threads MaShN "learner"
|
blanchet@49334
|
684 |
|
blanchet@49263
|
685 |
end;
|