(* Author: Jia Meng, Cambridge University Computer Laboratory
ID: $Id$
Copyright 2004 University of Cambridge
ATPs with TPTP format input.
*)
signature RES_ATP =
sig
val prover: string ref
val custom_spass: string list ref
val destdir: string ref
val hook_count: int ref
val problem_name: string ref
val time_limit: int ref
end;
structure ResAtp: RES_ATP =
struct
val call_atp = ref false;
val hook_count = ref 0;
val time_limit = ref 60;
val prover = ref "E"; (* use E as the default prover *)
val custom_spass = (*specialized options for SPASS*)
ref ["-Auto=0","-FullRed=0","-IORe","-IOFc","-RTaut","-RFSub","-RBSub"];
val destdir = ref ""; (*Empty means write files to /tmp*)
val problem_name = ref "prob";
(*Return the path to a "helper" like SPASS or tptp2X, first checking that
it exists. FIXME: modify to use Path primitives and move to some central place.*)
fun helper_path evar base =
case getenv evar of
"" => error ("Isabelle environment variable " ^ evar ^ " not defined")
| home =>
let val path = home ^ "/" ^ base
in if File.exists (File.unpack_platform_path path) then path
else error ("Could not find the file " ^ path)
end;
fun probfile_nosuffix _ =
if !destdir = "" then File.platform_path (File.tmp_path (Path.basic (!problem_name)))
else if File.exists (File.unpack_platform_path (!destdir))
then !destdir ^ "/" ^ !problem_name
else error ("No such directory: " ^ !destdir);
fun prob_pathname n = probfile_nosuffix n ^ "_" ^ Int.toString n;
(**** For running in Isar ****)
(* same function as that in res_axioms.ML *)
fun repeat_RS thm1 thm2 =
let val thm1' = thm1 RS thm2 handle THM _ => thm1
in
if eq_thm(thm1,thm1') then thm1' else (repeat_RS thm1' thm2)
end;
(* a special version of repeat_RS *)
fun repeat_someI_ex th = repeat_RS th someI_ex;
fun writeln_strs _ [] = ()
| writeln_strs out (s::ss) = (TextIO.output (out, s); TextIO.output (out, "\n"); writeln_strs out ss);
(* write out a subgoal as tptp clauses to the file "xxxx_N"*)
fun tptp_inputs_tfrees thms pf n (axclauses,classrel_clauses,arity_clauses) =
let
val clss = map (ResClause.make_conjecture_clause_thm) thms
val (tptp_clss,tfree_litss) = ListPair.unzip (map ResClause.clause2tptp clss)
val tfree_clss = map ResClause.tfree_clause (foldl (op union_string) [] tfree_litss)
val classrel_cls = map ResClause.tptp_classrelClause classrel_clauses
val arity_cls = map ResClause.tptp_arity_clause arity_clauses
val out = TextIO.openOut(pf n)
in
writeln_strs out (List.concat (map ResClause.tptp_clause axclauses));
writeln_strs out (tfree_clss @ tptp_clss @ classrel_cls @ arity_cls);
TextIO.closeOut out
end;
(* write out a subgoal in DFG format to the file "xxxx_N"*)
fun dfg_inputs_tfrees thms pf n (axclauses,classrel_clauses,arity_clauses) =
let val clss = map (ResClause.make_conjecture_clause_thm) thms
(*FIXME: classrel_clauses and arity_clauses*)
val probN = ResClause.clauses2dfg clss (!problem_name ^ "_" ^ Int.toString n)
axclauses [] [] []
val out = TextIO.openOut(pf n)
in
writeln_strs out [probN]; TextIO.closeOut out
end;
(*********************************************************************)
(* call prover with settings and problem file for the current subgoal *)
(*********************************************************************)
(* now passing in list of skolemized thms and list of sgterms to go with them *)
fun watcher_call_provers sign sg_terms (childin, childout, pid) =
let
fun make_atp_list [] n = []
| make_atp_list (sg_term::xs) n =
let
val probfile = prob_pathname n
val time = Int.toString (!time_limit)
in
debug ("problem file in watcher_call_provers is " ^ probfile);
(*Avoid command arguments containing spaces: Poly/ML and SML/NJ
versions of Unix.execute treat them differently!*)
(*options are separated by Watcher.setting_sep, currently #"%"*)
if !prover = "spass"
then
let val optionline =
if !AtpCommunication.reconstruct
(*Proof reconstruction works for only a limited set of
inference rules*)
then space_implode "%" (!custom_spass) ^
"%-DocProof%-TimeLimit=" ^ time
else "-DocProof%-SOS%-FullRed=0%-TimeLimit=" ^ time (*Auto mode*)
val _ = debug ("SPASS option string is " ^ optionline)
val _ = helper_path "SPASS_HOME" "SPASS"
(*We've checked that SPASS is there for ATP/spassshell to run.*)
in
([("spass",
getenv "ISABELLE_HOME" ^ "/src/HOL/Tools/ATP/spassshell",
optionline, probfile)] @
(make_atp_list xs (n+1)))
end
else if !prover = "vampire"
then
let val vampire = helper_path "VAMPIRE_HOME" "vampire"
in
([("vampire", vampire, "-m 100000%-t " ^ time, probfile)] @
(make_atp_list xs (n+1))) (*BEWARE! spaces in options!*)
end
else if !prover = "E"
then
let val Eprover = helper_path "E_HOME" "eproof"
in
([("E", Eprover,
"--tptp-in%-l5%-xAuto%-tAuto%--cpu-limit=" ^ time,
probfile)] @
(make_atp_list xs (n+1)))
end
else error ("Invalid prover name: " ^ !prover)
end
val atp_list = make_atp_list sg_terms 1
in
Watcher.callResProvers(childout,atp_list);
debug "Sent commands to watcher!"
end
(*We write out problem files for each subgoal. Argument pf generates filenames,
and allows the suppression of the suffix "_1" in problem-generation mode.*)
fun write_problem_files pf (ctxt,th) =
let val prems = Thm.prems_of th
val (clause_arr, axclauses) = ResClasimp.get_clasimp_lemmas ctxt (hd prems)
(*FIXME: hack!! need to consider relevance for all prems*)
val _ = debug ("claset and simprules total clauses = " ^
Int.toString (Array.length clause_arr))
val thy = ProofContext.theory_of ctxt
val classrel_clauses = ResTypesSorts.classrel_clauses_thy thy
val _ = debug ("classrel clauses = " ^ Int.toString (length classrel_clauses))
val arity_clauses = ResTypesSorts.arity_clause_thy thy
val _ = debug ("arity clauses = " ^ Int.toString (length arity_clauses))
val write = if !prover = "spass" then dfg_inputs_tfrees else tptp_inputs_tfrees
fun writenext n =
if n=0 then []
else
(SELECT_GOAL
(EVERY1 [rtac ccontr, ObjectLogic.atomize_tac, skolemize_tac,
METAHYPS(fn negs =>
(write (make_clauses negs) pf n
(axclauses,classrel_clauses,arity_clauses);
all_tac))]) n th;
pf n :: writenext (n-1))
in (writenext (length prems), clause_arr) end;
val last_watcher_pid = ref (NONE : (TextIO.instream * TextIO.outstream *
Posix.Process.pid * string list) option);
fun kill_last_watcher () =
(case !last_watcher_pid of
NONE => ()
| SOME (_, childout, pid, files) =>
(debug ("Killing old watcher, pid = " ^ string_of_pid pid);
Watcher.killWatcher pid;
ignore (map (try OS.FileSys.remove) files)))
handle OS.SysErr _ => debug "Attempt to kill watcher failed";
(*writes out the current clasimpset to a tptp file;
turns off xsymbol at start of function, restoring it at end *)
val isar_atp = setmp print_mode []
(fn (ctxt, th) =>
if Thm.no_prems th then ()
else
let
val _ = kill_last_watcher()
val (files,clause_arr) = write_problem_files prob_pathname (ctxt,th)
val (childin, childout, pid) = Watcher.createWatcher (th, clause_arr)
in
last_watcher_pid := SOME (childin, childout, pid, files);
debug ("problem files: " ^ space_implode ", " files);
debug ("pid: " ^ string_of_pid pid);
watcher_call_provers (sign_of_thm th) (Thm.prems_of th) (childin, childout, pid)
end);
val isar_atp_writeonly = setmp print_mode []
(fn (ctxt,th) =>
if Thm.no_prems th then ()
else
let val pf = if Thm.nprems_of th = 1 then probfile_nosuffix
else prob_pathname
in ignore (write_problem_files pf (ctxt,th)) end);
(** the Isar toplevel hook **)
val invoke_atp = Toplevel.unknown_proof o Toplevel.keep (fn state =>
let
val proof = Toplevel.proof_of state
val (ctxt, (_, goal)) = Proof.get_goal proof
handle Proof.STATE _ => error "No goal present";
val thy = ProofContext.theory_of ctxt;
in
debug ("subgoals in isar_atp:\n" ^
Pretty.string_of (ProofContext.pretty_term ctxt
(Logic.mk_conjunction_list (Thm.prems_of goal))));
debug ("number of subgoals in isar_atp: " ^ Int.toString (Thm.nprems_of goal));
debug ("current theory: " ^ Context.theory_name thy);
hook_count := !hook_count +1;
debug ("in hook for time: " ^ Int.toString (!hook_count));
ResClause.init thy;
if !destdir = "" andalso !time_limit > 0 then isar_atp (ctxt, goal)
else isar_atp_writeonly (ctxt, goal)
end);
val call_atpP =
OuterSyntax.command
"ProofGeneral.call_atp"
"call automatic theorem provers"
OuterKeyword.diag
(Scan.succeed (Toplevel.no_timing o invoke_atp));
val _ = OuterSyntax.add_parsers [call_atpP];
end;