made the format (TFF or FOF) of the TPTP problem a global argument of the problem again and have the ATPs report which formats they support
(* Title: HOL/Tools/Sledgehammer/sledgehammer_provers.ML
Author: Fabian Immler, TU Muenchen
Author: Makarius
Author: Jasmin Blanchette, TU Muenchen
Generic prover abstraction for Sledgehammer.
*)
signature SLEDGEHAMMER_PROVERS =
sig
type failure = ATP_Proof.failure
type locality = Sledgehammer_Filter.locality
type relevance_fudge = Sledgehammer_Filter.relevance_fudge
type translated_formula = Sledgehammer_ATP_Translate.translated_formula
type type_system = Sledgehammer_ATP_Translate.type_system
type minimize_command = Sledgehammer_ATP_Reconstruct.minimize_command
type params =
{debug: bool,
verbose: bool,
overlord: bool,
blocking: bool,
provers: string list,
type_sys: type_system,
relevance_thresholds: real * real,
max_relevant: int option,
monomorphize: bool,
monomorphize_limit: int,
explicit_apply: bool,
isar_proof: bool,
isar_shrink_factor: int,
slicing: bool,
timeout: Time.time,
expect: string}
datatype prover_fact =
Untranslated_Fact of (string * locality) * thm |
ATP_Translated_Fact of
translated_formula option * ((string * locality) * thm) |
SMT_Weighted_Fact of (string * locality) * (int option * thm)
type prover_problem =
{state: Proof.state,
goal: thm,
subgoal: int,
subgoal_count: int,
facts: prover_fact list,
smt_filter: (string * locality) SMT_Solver.smt_filter_data option}
type prover_result =
{outcome: failure option,
used_facts: (string * locality) list,
run_time_in_msecs: int option,
message: string}
type prover = params -> minimize_command -> prover_problem -> prover_result
(* for experimentation purposes -- do not use in production code *)
val smt_triggers : bool Unsynchronized.ref
val smt_weights : bool Unsynchronized.ref
val smt_weight_min_facts : int Unsynchronized.ref
val smt_min_weight : int Unsynchronized.ref
val smt_max_weight : int Unsynchronized.ref
val smt_max_weight_index : int Unsynchronized.ref
val smt_weight_curve : (int -> int) Unsynchronized.ref
val smt_max_slices : int Unsynchronized.ref
val smt_slice_fact_frac : real Unsynchronized.ref
val smt_slice_time_frac : real Unsynchronized.ref
val smt_slice_min_secs : int Unsynchronized.ref
val das_Tool : string
val select_smt_solver : string -> Proof.context -> Proof.context
val is_smt_prover : Proof.context -> string -> bool
val is_prover_supported : Proof.context -> string -> bool
val is_prover_installed : Proof.context -> string -> bool
val default_max_relevant_for_prover : Proof.context -> bool -> string -> int
val is_built_in_const_for_prover :
Proof.context -> string -> string * typ -> term list -> bool * term list
val atp_relevance_fudge : relevance_fudge
val smt_relevance_fudge : relevance_fudge
val relevance_fudge_for_prover : Proof.context -> string -> relevance_fudge
val dest_dir : string Config.T
val problem_prefix : string Config.T
val measure_run_time : bool Config.T
val weight_smt_fact :
theory -> int -> ((string * locality) * thm) * int
-> (string * locality) * (int option * thm)
val untranslated_fact : prover_fact -> (string * locality) * thm
val smt_weighted_fact :
theory -> int -> prover_fact * int
-> (string * locality) * (int option * thm)
val supported_provers : Proof.context -> unit
val kill_provers : unit -> unit
val running_provers : unit -> unit
val messages : int option -> unit
val get_prover : Proof.context -> bool -> string -> prover
val setup : theory -> theory
end;
structure Sledgehammer_Provers : SLEDGEHAMMER_PROVERS =
struct
open ATP_Problem
open ATP_Proof
open ATP_Systems
open Metis_Translate
open Sledgehammer_Util
open Sledgehammer_Filter
open Sledgehammer_ATP_Translate
open Sledgehammer_ATP_Reconstruct
(** The Sledgehammer **)
(* Identifier to distinguish Sledgehammer from other tools using
"Async_Manager". *)
val das_Tool = "Sledgehammer"
val select_smt_solver =
Context.proof_map o SMT_Config.select_solver
fun is_smt_prover ctxt name =
member (op =) (SMT_Solver.available_solvers_of ctxt) name
fun is_prover_supported ctxt name =
let val thy = Proof_Context.theory_of ctxt in
is_smt_prover ctxt name orelse member (op =) (supported_atps thy) name
end
fun is_prover_installed ctxt =
is_smt_prover ctxt orf is_atp_installed (Proof_Context.theory_of ctxt)
fun get_slices slicing slices =
(0 upto length slices - 1) ~~ slices |> not slicing ? (List.last #> single)
fun default_max_relevant_for_prover ctxt slicing name =
let val thy = Proof_Context.theory_of ctxt in
if is_smt_prover ctxt name then
SMT_Solver.default_max_relevant ctxt name
else
fold (Integer.max o snd o snd o snd)
(get_slices slicing (#slices (get_atp thy name) ())) 0
end
(* These are either simplified away by "Meson.presimplify" (most of the time) or
handled specially via "fFalse", "fTrue", ..., "fequal". *)
val atp_irrelevant_consts =
[@{const_name False}, @{const_name True}, @{const_name Not},
@{const_name conj}, @{const_name disj}, @{const_name implies},
@{const_name HOL.eq}, @{const_name If}, @{const_name Let}]
fun is_built_in_const_for_prover ctxt name =
if is_smt_prover ctxt name then
let val ctxt = ctxt |> select_smt_solver name in
fn x => fn ts =>
if SMT_Builtin.is_builtin_num_ext ctxt (list_comb (Const x, ts)) then
(true, [])
else if SMT_Builtin.is_builtin_fun_ext ctxt x ts then
(true, ts)
else
(false, ts)
end
else
fn (s, _) => fn ts => (member (op =) atp_irrelevant_consts s, ts)
(* FUDGE *)
val atp_relevance_fudge =
{allow_ext = true,
local_const_multiplier = 1.5,
worse_irrel_freq = 100.0,
higher_order_irrel_weight = 1.05,
abs_rel_weight = 0.5,
abs_irrel_weight = 2.0,
skolem_irrel_weight = 0.75,
theory_const_rel_weight = 0.5,
theory_const_irrel_weight = 0.25,
intro_bonus = 0.15,
elim_bonus = 0.15,
simp_bonus = 0.15,
local_bonus = 0.55,
assum_bonus = 1.05,
chained_bonus = 1.5,
max_imperfect = 11.5,
max_imperfect_exp = 1.0,
threshold_divisor = 2.0,
ridiculous_threshold = 0.01}
(* FUDGE (FIXME) *)
val smt_relevance_fudge =
{allow_ext = false,
local_const_multiplier = #local_const_multiplier atp_relevance_fudge,
worse_irrel_freq = #worse_irrel_freq atp_relevance_fudge,
higher_order_irrel_weight = #higher_order_irrel_weight atp_relevance_fudge,
abs_rel_weight = #abs_rel_weight atp_relevance_fudge,
abs_irrel_weight = #abs_irrel_weight atp_relevance_fudge,
skolem_irrel_weight = #skolem_irrel_weight atp_relevance_fudge,
theory_const_rel_weight = #theory_const_rel_weight atp_relevance_fudge,
theory_const_irrel_weight = #theory_const_irrel_weight atp_relevance_fudge,
intro_bonus = #intro_bonus atp_relevance_fudge,
elim_bonus = #elim_bonus atp_relevance_fudge,
simp_bonus = #simp_bonus atp_relevance_fudge,
local_bonus = #local_bonus atp_relevance_fudge,
assum_bonus = #assum_bonus atp_relevance_fudge,
chained_bonus = #chained_bonus atp_relevance_fudge,
max_imperfect = #max_imperfect atp_relevance_fudge,
max_imperfect_exp = #max_imperfect_exp atp_relevance_fudge,
threshold_divisor = #threshold_divisor atp_relevance_fudge,
ridiculous_threshold = #ridiculous_threshold atp_relevance_fudge}
fun relevance_fudge_for_prover ctxt name =
if is_smt_prover ctxt name then smt_relevance_fudge else atp_relevance_fudge
fun supported_provers ctxt =
let
val thy = Proof_Context.theory_of ctxt
val (remote_provers, local_provers) =
sort_strings (supported_atps thy) @
sort_strings (SMT_Solver.available_solvers_of ctxt)
|> List.partition (String.isPrefix remote_prefix)
in
Output.urgent_message ("Supported provers: " ^
commas (local_provers @ remote_provers) ^ ".")
end
fun kill_provers () = Async_Manager.kill_threads das_Tool "provers"
fun running_provers () = Async_Manager.running_threads das_Tool "provers"
val messages = Async_Manager.thread_messages das_Tool "prover"
(** problems, results, ATPs, etc. **)
type params =
{debug: bool,
verbose: bool,
overlord: bool,
blocking: bool,
provers: string list,
type_sys: type_system,
relevance_thresholds: real * real,
max_relevant: int option,
monomorphize: bool,
monomorphize_limit: int,
explicit_apply: bool,
isar_proof: bool,
isar_shrink_factor: int,
slicing: bool,
timeout: Time.time,
expect: string}
datatype prover_fact =
Untranslated_Fact of (string * locality) * thm |
ATP_Translated_Fact of
translated_formula option * ((string * locality) * thm) |
SMT_Weighted_Fact of (string * locality) * (int option * thm)
type prover_problem =
{state: Proof.state,
goal: thm,
subgoal: int,
subgoal_count: int,
facts: prover_fact list,
smt_filter: (string * locality) SMT_Solver.smt_filter_data option}
type prover_result =
{outcome: failure option,
message: string,
used_facts: (string * locality) list,
run_time_in_msecs: int option}
type prover = params -> minimize_command -> prover_problem -> prover_result
(* configuration attributes *)
val (dest_dir, dest_dir_setup) =
Attrib.config_string "sledgehammer_dest_dir" (K "")
(* Empty string means create files in Isabelle's temporary files directory. *)
val (problem_prefix, problem_prefix_setup) =
Attrib.config_string "sledgehammer_problem_prefix" (K "prob")
val (measure_run_time, measure_run_time_setup) =
Attrib.config_bool "sledgehammer_measure_run_time" (K false)
fun with_path cleanup after f path =
Exn.capture f path
|> tap (fn _ => cleanup path)
|> Exn.release
|> tap (after path)
fun proof_banner auto =
if auto then "Auto Sledgehammer found a proof" else "Try this command"
val smt_triggers = Unsynchronized.ref true
val smt_weights = Unsynchronized.ref true
val smt_weight_min_facts = Unsynchronized.ref 20
(* FUDGE *)
val smt_min_weight = Unsynchronized.ref 0
val smt_max_weight = Unsynchronized.ref 10
val smt_max_weight_index = Unsynchronized.ref 200
val smt_weight_curve = Unsynchronized.ref (fn x : int => x * x)
fun smt_fact_weight j num_facts =
if !smt_weights andalso num_facts >= !smt_weight_min_facts then
SOME (!smt_max_weight
- (!smt_max_weight - !smt_min_weight + 1)
* !smt_weight_curve (Int.max (0, !smt_max_weight_index - j - 1))
div !smt_weight_curve (!smt_max_weight_index))
else
NONE
fun weight_smt_fact thy num_facts ((info, th), j) =
(info, (smt_fact_weight j num_facts, th |> Thm.transfer thy))
fun untranslated_fact (Untranslated_Fact p) = p
| untranslated_fact (ATP_Translated_Fact (_, p)) = p
| untranslated_fact (SMT_Weighted_Fact (info, (_, th))) = (info, th)
fun atp_translated_fact _ (ATP_Translated_Fact p) = p
| atp_translated_fact ctxt fact =
translate_atp_fact ctxt false (untranslated_fact fact)
fun smt_weighted_fact _ _ (SMT_Weighted_Fact p, _) = p
| smt_weighted_fact thy num_facts (fact, j) =
(untranslated_fact fact, j) |> weight_smt_fact thy num_facts
fun overlord_file_location_for_prover prover =
(getenv "ISABELLE_HOME_USER", "prob_" ^ prover)
(* generic TPTP-based ATPs *)
fun int_opt_add (SOME m) (SOME n) = SOME (m + n)
| int_opt_add _ _ = NONE
val atp_blacklist_max_iters = 10
(* Important messages are important but not so important that users want to see
them each time. *)
val atp_important_message_keep_factor = 0.1
fun must_monomorphize Many_Typed = true
| must_monomorphize (Mangled _) = true
| must_monomorphize _ = false
fun run_atp auto name
({exec, required_execs, arguments, slices, proof_delims, known_failures,
hypothesis_kind, ...} : atp_config)
({debug, verbose, overlord, type_sys, max_relevant, monomorphize,
monomorphize_limit, explicit_apply, isar_proof, isar_shrink_factor,
slicing, timeout, ...} : params)
minimize_command ({state, goal, subgoal, facts, ...} : prover_problem) =
let
val thy = Proof.theory_of state
val ctxt = Proof.context_of state
val format = if type_sys = Many_Typed then Tff else Fof
val (_, hyp_ts, concl_t) = strip_subgoal goal subgoal
val (dest_dir, problem_prefix) =
if overlord then overlord_file_location_for_prover name
else (Config.get ctxt dest_dir, Config.get ctxt problem_prefix)
val problem_file_name =
Path.basic (problem_prefix ^ (if overlord then "" else serial_string ()) ^
"_" ^ string_of_int subgoal)
val problem_path_name =
if dest_dir = "" then
File.tmp_path problem_file_name
else if File.exists (Path.explode dest_dir) then
Path.append (Path.explode dest_dir) problem_file_name
else
error ("No such directory: " ^ quote dest_dir ^ ".")
val measure_run_time = verbose orelse Config.get ctxt measure_run_time
val command = Path.explode (getenv (fst exec) ^ "/" ^ snd exec)
fun split_time s =
let
val split = String.tokens (fn c => str c = "\n")
val (output, t) = s |> split |> split_last |> apfst cat_lines
fun as_num f = f >> (fst o read_int)
val num = as_num (Scan.many1 Symbol.is_ascii_digit)
val digit = Scan.one Symbol.is_ascii_digit
val num3 = as_num (digit ::: digit ::: (digit >> single))
val time = num --| Scan.$$ "." -- num3 >> (fn (a, b) => a * 1000 + b)
val as_time = Scan.read Symbol.stopper time o raw_explode
in (output, as_time t) end
fun run_on prob_file =
case filter (curry (op =) "" o getenv o fst) (exec :: required_execs) of
(home_var, _) :: _ =>
error ("The environment variable " ^ quote home_var ^ " is not set.")
| [] =>
if File.exists command then
let
(* If slicing is disabled, we expand the last slice to fill the
entire time available. *)
val actual_slices = get_slices slicing (slices ())
val num_actual_slices = length actual_slices
fun monomorphize_facts facts =
let
val repair_context =
Config.put SMT_Config.verbose debug
#> Config.put SMT_Config.monomorph_full false
#> Config.put SMT_Config.monomorph_limit monomorphize_limit
val facts = facts |> map untranslated_fact
(* pseudo-theorem involving the same constants as the subgoal *)
val subgoal_th =
Logic.list_implies (hyp_ts, concl_t)
|> Skip_Proof.make_thm thy
val indexed_facts =
(~1, subgoal_th) :: (0 upto length facts - 1 ~~ map snd facts)
in
SMT_Monomorph.monomorph indexed_facts (repair_context ctxt)
|> fst |> sort (int_ord o pairself fst)
|> filter_out (curry (op =) ~1 o fst)
|> map (Untranslated_Fact o apfst (fst o nth facts))
end
fun run_slice blacklist
(slice, (time_frac, (complete, default_max_relevant)))
time_left =
let
val num_facts =
length facts |> is_none max_relevant
? Integer.min default_max_relevant
val facts =
facts |> take num_facts
|> not (null blacklist)
? filter_out (member (op =) blacklist o fst
o untranslated_fact)
|> (monomorphize orelse must_monomorphize type_sys)
? monomorphize_facts
|> map (atp_translated_fact ctxt)
val real_ms = Real.fromInt o Time.toMilliseconds
val slice_timeout =
((real_ms time_left
|> (if slice < num_actual_slices - 1 then
curry Real.min (time_frac * real_ms timeout)
else
I))
* 0.001) |> seconds
val _ =
if verbose then
"ATP slice " ^ string_of_int (slice + 1) ^ " with " ^
string_of_int num_facts ^ " fact" ^ plural_s num_facts ^
" for " ^ string_from_time slice_timeout ^ "..."
|> Output.urgent_message
else
()
val (atp_problem, pool, conjecture_offset, facts_offset,
fact_names) =
prepare_atp_problem ctxt type_sys explicit_apply hyp_ts
concl_t facts
fun weights () = atp_problem_weights atp_problem
val core =
File.shell_path command ^ " " ^
arguments slice slice_timeout weights ^ " " ^
File.shell_path prob_file
val command =
(if measure_run_time then
"TIMEFORMAT='%3R'; { time " ^ core ^ " ; }"
else
"exec " ^ core) ^ " 2>&1"
val _ =
atp_problem
|> tptp_strings_for_atp_problem hypothesis_kind format
|> cons ("% " ^ command ^ "\n")
|> File.write_list prob_file
val conjecture_shape =
conjecture_offset + 1
upto conjecture_offset + length hyp_ts + 1
|> map single
val ((output, msecs), res_code) =
bash_output command
|>> (if overlord then
prefix ("% " ^ command ^ "\n% " ^ timestamp () ^ "\n")
else
I)
|>> (if measure_run_time then split_time else rpair NONE)
val (atp_proof, outcome) =
extract_tstplike_proof_and_outcome debug verbose complete
res_code proof_delims known_failures output
|>> atp_proof_from_tstplike_proof
val (conjecture_shape, fact_names) =
if is_none outcome then
repair_conjecture_shape_and_fact_names output
conjecture_shape fact_names
else
(conjecture_shape, fact_names) (* don't bother repairing *)
val outcome =
case outcome of
NONE => if not (is_type_system_sound type_sys) andalso
is_unsound_proof conjecture_shape facts_offset
fact_names atp_proof then
SOME UnsoundProof
else
NONE
| SOME Unprovable =>
if null blacklist then outcome
else SOME IncompleteUnprovable
| _ => outcome
in
((pool, conjecture_shape, facts_offset, fact_names),
(output, msecs, atp_proof, outcome))
end
val timer = Timer.startRealTimer ()
fun maybe_run_slice blacklist slice
(result as (_, (_, msecs0, _, SOME _))) =
let
val time_left = Time.- (timeout, Timer.checkRealTimer timer)
in
if Time.<= (time_left, Time.zeroTime) then
result
else
(run_slice blacklist slice time_left
|> (fn (stuff, (output, msecs, atp_proof, outcome)) =>
(stuff, (output, int_opt_add msecs0 msecs, atp_proof,
outcome))))
end
| maybe_run_slice _ _ result = result
fun maybe_blacklist_facts_and_retry iter blacklist
(result as ((_, _, facts_offset, fact_names),
(_, _, atp_proof, SOME UnsoundProof))) =
(case used_facts_in_atp_proof facts_offset fact_names
atp_proof of
[] => result
| new_baddies =>
let val blacklist = new_baddies @ blacklist in
result
|> maybe_run_slice blacklist (List.last actual_slices)
|> iter < atp_blacklist_max_iters
? maybe_blacklist_facts_and_retry (iter + 1) blacklist
end)
| maybe_blacklist_facts_and_retry _ _ result = result
in
((Symtab.empty, [], 0, Vector.fromList []),
("", SOME 0, [], SOME InternalError))
|> fold (maybe_run_slice []) actual_slices
(* The ATP found an unsound proof? Automatically try again
without the offending facts! *)
|> maybe_blacklist_facts_and_retry 0 []
end
else
error ("Bad executable: " ^ Path.print command ^ ".")
(* If the problem file has not been exported, remove it; otherwise, export
the proof file too. *)
fun cleanup prob_file =
if dest_dir = "" then try File.rm prob_file else NONE
fun export prob_file (_, (output, _, _, _)) =
if dest_dir = "" then
()
else
File.write (Path.explode (Path.implode prob_file ^ "_proof")) output
val ((pool, conjecture_shape, facts_offset, fact_names),
(output, msecs, atp_proof, outcome)) =
with_path cleanup export run_on problem_path_name
val important_message =
if not auto andalso random () <= atp_important_message_keep_factor then
extract_important_message output
else
""
fun append_to_message message =
message ^
(if verbose then
"\nATP real CPU time: " ^
string_from_time (Time.fromMilliseconds (the msecs)) ^ "."
else
"") ^
(if important_message <> "" then
"\n\nImportant message from Dr. Geoff Sutcliffe:\n" ^ important_message
else
"")
val isar_params = (pool, debug, isar_shrink_factor, ctxt, conjecture_shape)
val metis_params =
(proof_banner auto, type_sys, minimize_command, atp_proof, facts_offset,
fact_names, goal, subgoal)
val (outcome, (message, used_facts)) =
case outcome of
NONE =>
(NONE, proof_text isar_proof isar_params metis_params
|>> append_to_message)
| SOME ProofMissing =>
(NONE, metis_proof_text metis_params |>> append_to_message)
| SOME failure => (outcome, (string_for_failure failure, []))
in
{outcome = outcome, message = message, used_facts = used_facts,
run_time_in_msecs = msecs}
end
(* "SMT_Failure.Abnormal_Termination" carries the solver's return code. Until
these are sorted out properly in the SMT module, we have to interpret these
ourselves. *)
val remote_smt_failures =
[(22, CantConnect),
(2, NoLibwwwPerl)]
val z3_wrapper_failures =
[(10, NoRealZ3),
(11, InternalError),
(12, InternalError),
(13, InternalError)]
val z3_failures =
[(101, OutOfResources),
(103, MalformedInput),
(110, MalformedInput)]
val unix_failures =
[(139, Crashed)]
val smt_failures =
remote_smt_failures @ z3_wrapper_failures @ z3_failures @ unix_failures
fun failure_from_smt_failure (SMT_Failure.Counterexample {is_real_cex, ...}) =
if is_real_cex then Unprovable else IncompleteUnprovable
| failure_from_smt_failure SMT_Failure.Time_Out = TimedOut
| failure_from_smt_failure (SMT_Failure.Abnormal_Termination code) =
(case AList.lookup (op =) smt_failures code of
SOME failure => failure
| NONE => UnknownError ("Abnormal termination with exit code " ^
string_of_int code ^ "."))
| failure_from_smt_failure SMT_Failure.Out_Of_Memory = OutOfResources
| failure_from_smt_failure (SMT_Failure.Other_Failure msg) =
UnknownError msg
(* FUDGE *)
val smt_max_slices = Unsynchronized.ref 8
val smt_slice_fact_frac = Unsynchronized.ref 0.5
val smt_slice_time_frac = Unsynchronized.ref 0.5
val smt_slice_min_secs = Unsynchronized.ref 5
fun smt_filter_loop name ({debug, verbose, overlord, monomorphize_limit,
timeout, slicing, ...} : params)
state i smt_filter =
let
val ctxt = Proof.context_of state
val max_slices = if slicing then !smt_max_slices else 1
val repair_context =
select_smt_solver name
#> Config.put SMT_Config.verbose debug
#> (if overlord then
Config.put SMT_Config.debug_files
(overlord_file_location_for_prover name
|> (fn (path, name) => path ^ "/" ^ name))
else
I)
#> Config.put SMT_Config.infer_triggers (!smt_triggers)
#> Config.put SMT_Config.monomorph_full false
#> Config.put SMT_Config.monomorph_limit monomorphize_limit
val state = state |> Proof.map_context repair_context
fun do_slice timeout slice outcome0 time_so_far facts =
let
val timer = Timer.startRealTimer ()
val ms = timeout |> Time.toMilliseconds
val slice_timeout =
if slice < max_slices then
Int.min (ms,
Int.max (1000 * !smt_slice_min_secs,
Real.ceil (!smt_slice_time_frac * Real.fromInt ms)))
|> Time.fromMilliseconds
else
timeout
val num_facts = length facts
val _ =
if verbose then
"SMT slice with " ^ string_of_int num_facts ^ " fact" ^
plural_s num_facts ^ " for " ^ string_from_time slice_timeout ^
"..."
|> Output.urgent_message
else
()
val birth = Timer.checkRealTimer timer
val _ =
if debug then Output.urgent_message "Invoking SMT solver..." else ()
val (outcome, used_facts) =
(case (slice, smt_filter) of
(1, SOME head) => head |> apsnd (apsnd repair_context)
| _ => SMT_Solver.smt_filter_preprocess state facts i)
|> SMT_Solver.smt_filter_apply slice_timeout
|> (fn {outcome, used_facts} => (outcome, used_facts))
handle exn => if Exn.is_interrupt exn then
reraise exn
else
(ML_Compiler.exn_message exn
|> SMT_Failure.Other_Failure |> SOME, [])
val death = Timer.checkRealTimer timer
val _ =
if verbose andalso is_some outcome then
"SMT outcome: " ^ SMT_Failure.string_of_failure ctxt (the outcome)
|> Output.urgent_message
else if debug then
Output.urgent_message "SMT solver returned."
else
()
val outcome0 = if is_none outcome0 then SOME outcome else outcome0
val time_so_far = Time.+ (time_so_far, Time.- (death, birth))
val too_many_facts_perhaps =
case outcome of
NONE => false
| SOME (SMT_Failure.Counterexample _) => false
| SOME SMT_Failure.Time_Out => slice_timeout <> timeout
| SOME (SMT_Failure.Abnormal_Termination code) =>
(if verbose then
"The SMT solver invoked with " ^ string_of_int num_facts ^
" fact" ^ plural_s num_facts ^ " terminated abnormally with \
\exit code " ^ string_of_int code ^ "."
|> warning
else
();
true (* kind of *))
| SOME SMT_Failure.Out_Of_Memory => true
| SOME (SMT_Failure.Other_Failure _) => true
val timeout = Time.- (timeout, Timer.checkRealTimer timer)
in
if too_many_facts_perhaps andalso slice < max_slices andalso
num_facts > 0 andalso Time.> (timeout, Time.zeroTime) then
let
val n = Real.ceil (!smt_slice_fact_frac * Real.fromInt num_facts)
in
do_slice timeout (slice + 1) outcome0 time_so_far (take n facts)
end
else
{outcome = if is_none outcome then NONE else the outcome0,
used_facts = used_facts,
run_time_in_msecs = SOME (Time.toMilliseconds time_so_far)}
end
in do_slice timeout 1 NONE Time.zeroTime end
(* taken from "Mirabelle" and generalized *)
fun can_apply timeout tac state i =
let
val {context = ctxt, facts, goal} = Proof.goal state
val full_tac = Method.insert_tac facts i THEN tac ctxt i
in
case try (TimeLimit.timeLimit timeout (Seq.pull o full_tac)) goal of
SOME (SOME _) => true
| _ => false
end
val smt_metis_timeout = seconds 1.0
fun can_apply_metis debug state i ths =
can_apply smt_metis_timeout
(Config.put Metis_Tactics.verbose debug
#> (fn ctxt => Metis_Tactics.metis_tac ctxt ths)) state i
fun run_smt_solver auto name (params as {debug, verbose, ...}) minimize_command
({state, subgoal, subgoal_count, facts, smt_filter, ...}
: prover_problem) =
let
val ctxt = Proof.context_of state
val thy = Proof.theory_of state
val num_facts = length facts
val facts = facts ~~ (0 upto num_facts - 1)
|> map (smt_weighted_fact thy num_facts)
val {outcome, used_facts, run_time_in_msecs} =
smt_filter_loop name params state subgoal smt_filter facts
val (chained_lemmas, other_lemmas) = split_used_facts (map fst used_facts)
val outcome = outcome |> Option.map failure_from_smt_failure
val message =
case outcome of
NONE =>
let
val (method, settings) =
if can_apply_metis debug state subgoal (map snd used_facts) then
("metis", "")
else
("smt", if name = SMT_Solver.solver_name_of ctxt then ""
else "smt_solver = " ^ maybe_quote name)
in
try_command_line (proof_banner auto)
(apply_on_subgoal settings subgoal subgoal_count ^
command_call method (map fst other_lemmas)) ^
minimize_line minimize_command
(map fst (other_lemmas @ chained_lemmas)) ^
(if verbose then
"\nSMT solver real CPU time: " ^
string_from_time (Time.fromMilliseconds (the run_time_in_msecs)) ^
"."
else
"")
end
| SOME failure => string_for_failure failure
in
{outcome = outcome, used_facts = map fst used_facts,
run_time_in_msecs = run_time_in_msecs, message = message}
end
fun get_prover ctxt auto name =
let val thy = Proof_Context.theory_of ctxt in
if is_smt_prover ctxt name then
run_smt_solver auto name
else if member (op =) (supported_atps thy) name then
run_atp auto name (get_atp thy name)
else
error ("No such prover: " ^ name ^ ".")
end
val setup =
dest_dir_setup
#> problem_prefix_setup
#> measure_run_time_setup
end;