renamed system/system_out to bash/bash_output -- to emphasized that this is really GNU bash, not some undefined POSIX sh;
(* Title: HOL/SMT/Tools/smt_solver.ML
Author: Sascha Boehme, TU Muenchen
SMT solvers registry and SMT tactic.
*)
signature SMT_SOLVER =
sig
exception SMT of string
exception SMT_COUNTEREXAMPLE of bool * term list
type interface = {
normalize: SMT_Normalize.config list,
translate: SMT_Translate.config }
type proof_data = {
context: Proof.context,
output: string list,
recon: SMT_Translate.recon,
assms: thm list option }
type solver_config = {
command: {env_var: string, remote_name: string option},
arguments: string list,
interface: interface,
reconstruct: proof_data -> thm }
(*options*)
val timeout: int Config.T
val with_timeout: Proof.context -> ('a -> 'b) -> 'a -> 'b
val trace: bool Config.T
val trace_msg: Proof.context -> ('a -> string) -> 'a -> unit
val record: bool Config.T
val certificates: string Config.T
(*solvers*)
type solver = Proof.context -> thm list -> thm
type solver_info = Context.generic -> Pretty.T list
val add_solver: string * (Proof.context -> solver_config) -> theory ->
theory
val all_solver_names_of: theory -> string list
val add_solver_info: string * solver_info -> theory -> theory
val solver_name_of: Context.generic -> string
val select_solver: string -> Context.generic -> Context.generic
val solver_of: Context.generic -> solver
(*tactic*)
val smt_tac': bool -> Proof.context -> thm list -> int -> Tactical.tactic
val smt_tac: Proof.context -> thm list -> int -> Tactical.tactic
(*setup*)
val setup: theory -> theory
val print_setup: Context.generic -> unit
end
structure SMT_Solver: SMT_SOLVER =
struct
exception SMT of string
exception SMT_COUNTEREXAMPLE of bool * term list
type interface = {
normalize: SMT_Normalize.config list,
translate: SMT_Translate.config }
type proof_data = {
context: Proof.context,
output: string list,
recon: SMT_Translate.recon,
assms: thm list option }
type solver_config = {
command: {env_var: string, remote_name: string option},
arguments: string list,
interface: interface,
reconstruct: proof_data -> thm }
(* SMT options *)
val (timeout, setup_timeout) = Attrib.config_int "smt_timeout" 30
fun with_timeout ctxt f x =
TimeLimit.timeLimit (Time.fromSeconds (Config.get ctxt timeout)) f x
handle TimeLimit.TimeOut => raise SMT "timeout"
val (trace, setup_trace) = Attrib.config_bool "smt_trace" false
fun trace_msg ctxt f x =
if Config.get ctxt trace then tracing (f x) else ()
val (record, setup_record) = Attrib.config_bool "smt_record" true
val no_certificates = ""
val (certificates, setup_certificates) =
Attrib.config_string "smt_certificates" no_certificates
(* interface to external solvers *)
local
fun with_files ctxt f =
let
val paths as (problem_path, proof_path) =
"smt-" ^ serial_string ()
|> (fn n => (n, n ^ ".proof"))
|> pairself (File.tmp_path o Path.explode)
val y = Exn.capture f (problem_path, proof_path)
val _ = pairself (try File.rm) paths
in Exn.release y end
fun invoke ctxt output f (paths as (problem_path, proof_path)) =
let
fun pretty tag ls = Pretty.string_of (Pretty.big_list tag
(map Pretty.str ls))
val x = File.open_output output problem_path
val _ = trace_msg ctxt (pretty "SMT problem:" o split_lines o File.read)
problem_path
val (s, _) = with_timeout ctxt f paths
val _ = trace_msg ctxt (pretty "SMT solver:") (split_lines s)
fun lines_of path = the_default [] (try (File.fold_lines cons path) [])
val ls = rev (dropwhile (equal "") (lines_of proof_path))
val _ = trace_msg ctxt (pretty "SMT result:") ls
in (x, ls) end
fun choose {env_var, remote_name} =
let
val local_solver = getenv env_var
val remote_solver = the_default "" remote_name
val remote_url = getenv "REMOTE_SMT_URL"
in
if local_solver <> ""
then (["local", local_solver],
"Invoking local SMT solver " ^ quote local_solver ^ " ...")
else if remote_solver <> "" andalso remote_url <> ""
then (["remote", remote_solver],
"Invoking remote SMT solver " ^ quote remote_solver ^ " at " ^
quote remote_url ^ " ...")
else error ("Undefined Isabelle environment variable: " ^ quote env_var)
end
fun run ctxt cmd args (problem_path, proof_path) =
let
val certs = Config.get ctxt certificates
val certs' =
if certs = no_certificates then "-"
else File.shell_path (Path.explode certs)
val (solver, msg) =
if certs = no_certificates orelse Config.get ctxt record
then choose cmd
else (["certificate"], "Using certificate from " ^ quote certs' ^ " ...")
val _ = tracing msg
in
bash_output (space_implode " " ("perl -w" ::
File.shell_path (Path.explode (getenv "RUN_SMT_SOLVER")) :: certs' ::
map File.shell_quote (solver @ args) @
map File.shell_path [problem_path, proof_path]) ^ " 2>&1")
end
in
fun run_solver ctxt cmd args output =
with_files ctxt (invoke ctxt output (run ctxt cmd args))
end
fun make_proof_data ctxt ((recon, thms), ls) =
{context=ctxt, output=ls, recon=recon, assms=SOME thms}
fun gen_solver solver ctxt prems =
let
val {command, arguments, interface, reconstruct} = solver ctxt
val {normalize=nc, translate=tc} = interface
val thy = ProofContext.theory_of ctxt
in
SMT_Normalize.normalize nc ctxt prems
||> run_solver ctxt command arguments o SMT_Translate.translate tc thy
||> reconstruct o make_proof_data ctxt
|-> fold SMT_Normalize.discharge_definition
end
(* solver store *)
type solver = Proof.context -> thm list -> thm
type solver_info = Context.generic -> Pretty.T list
structure Solvers = Theory_Data
(
type T = ((Proof.context -> solver_config) * solver_info) Symtab.table
val empty = Symtab.empty
val extend = I
fun merge data = Symtab.merge (K true) data
handle Symtab.DUP name => error ("Duplicate SMT solver: " ^ quote name)
)
val no_solver = "(none)"
val add_solver = Solvers.map o Symtab.update_new o apsnd (rpair (K []))
val all_solver_names_of = Symtab.keys o Solvers.get
val lookup_solver = Symtab.lookup o Solvers.get
fun add_solver_info (n, i) = Solvers.map (Symtab.map_entry n (apsnd (K i)))
(* selected solver *)
structure Selected_Solver = Generic_Data
(
type T = string
val empty = no_solver
val extend = I
fun merge (s, _) = s
)
val solver_name_of = Selected_Solver.get
fun select_solver name gen =
if is_none (lookup_solver (Context.theory_of gen) name)
then error ("SMT solver not registered: " ^ quote name)
else Selected_Solver.map (K name) gen
fun raw_solver_of gen =
(case lookup_solver (Context.theory_of gen) (solver_name_of gen) of
NONE => error "No SMT solver selected"
| SOME (s, _) => s)
val solver_of = gen_solver o raw_solver_of
(* SMT tactic *)
local
fun pretty_cex ctxt (real, ex) =
let
val msg = if real then "SMT: counterexample found"
else "SMT: potential counterexample found"
in
if null ex then msg ^ "."
else Pretty.string_of (Pretty.big_list (msg ^ ":")
(map (Syntax.pretty_term ctxt) ex))
end
fun fail_tac f msg st = (f msg; Tactical.no_tac st)
fun SAFE pass_exns tac ctxt i st =
if pass_exns then tac ctxt i st
else (tac ctxt i st
handle SMT msg => fail_tac (trace_msg ctxt (prefix "SMT: ")) msg st
| SMT_COUNTEREXAMPLE ce => fail_tac tracing (pretty_cex ctxt ce) st)
fun smt_solver rules ctxt = solver_of (Context.Proof ctxt) ctxt rules
in
fun smt_tac' pass_exns ctxt rules =
Tactic.rtac @{thm ccontr} THEN'
SUBPROOF (fn {context, prems, ...} =>
SAFE pass_exns (Tactic.rtac o smt_solver (rules @ prems)) context 1) ctxt
val smt_tac = smt_tac' false
end
val smt_method =
Scan.optional Attrib.thms [] >>
(fn thms => fn ctxt => METHOD (fn facts =>
HEADGOAL (smt_tac ctxt (thms @ facts))))
(* setup *)
val setup =
Attrib.setup (Binding.name "smt_solver")
(Scan.lift (OuterParse.$$$ "=" |-- Args.name) >>
(Thm.declaration_attribute o K o select_solver))
"SMT solver configuration" #>
setup_timeout #>
setup_trace #>
setup_record #>
setup_certificates #>
Method.setup (Binding.name "smt") smt_method
"Applies an SMT solver to the current goal."
fun print_setup gen =
let
val t = string_of_int (Config.get_generic gen timeout)
val names = sort_strings (all_solver_names_of (Context.theory_of gen))
val ns = if null names then [no_solver] else names
val take_info = (fn (_, []) => NONE | info => SOME info)
val infos =
Context.theory_of gen
|> Symtab.dest o Solvers.get
|> map_filter (fn (n, (_, info)) => take_info (n, info gen))
|> sort (prod_ord string_ord (K EQUAL))
|> map (fn (n, ps) => Pretty.big_list (n ^ ":") ps)
in
Pretty.writeln (Pretty.big_list "SMT setup:" [
Pretty.str ("Current SMT solver: " ^ solver_name_of gen),
Pretty.str_list "Available SMT solvers: " "" ns,
Pretty.str ("Current timeout: " ^ t ^ " seconds"),
Pretty.big_list "Solver-specific settings:" infos])
end
val _ = OuterSyntax.improper_command "smt_status"
"Show the available SMT solvers and the currently selected solver."
OuterKeyword.diag
(Scan.succeed (Toplevel.no_timing o Toplevel.keep (fn state =>
print_setup (Context.Proof (Toplevel.context_of state)))))
end