src/HOL/Tools/res_atp.ML

tweaks mainly to achieve sml/nj compatibility

(*  Author: Jia Meng, Cambridge University Computer Laboratory
    ID: $Id$
    Copyright 2004 University of Cambridge

ATPs with TPTP format input.
*)

(*Jia: changed: isar_atp now processes entire proof context.  fetch thms from delta simpset/claset*)
(*Claire: changed: added actual watcher calls *)

signature RES_ATP = 
sig
val trace_res : bool ref
val axiom_file : Path.T
val hyps_file : Path.T
val isar_atp : ProofContext.context * Thm.thm -> unit
val prob_file : Path.T;
(*val atp_ax_tac : Thm.thm list -> int -> Tactical.tactic*)
(*val atp_tac : int -> Tactical.tactic*)
val debug: bool ref

end;

structure ResAtp : RES_ATP =

struct



(* used for debug *)
val debug = ref false;

fun debug_tac tac = (warning "testing";tac);
(* default value is false *)

val trace_res = ref false;

val skolem_tac = skolemize_tac;

val num_of_clauses = ref 0;
val clause_arr = Array.array(3500, ("empty", 0));


val atomize_tac =
    SUBGOAL
     (fn (prop,_) =>
	 let val ts = Logic.strip_assums_hyp prop
	 in EVERY1 
		[METAHYPS
		     (fn hyps => (cut_facts_tac (map (ObjectLogic.atomize_thm o forall_intr_vars) hyps) 1)),
	  REPEAT_DETERM_N (length ts) o (etac thin_rl)]
     end);

(* temporarily use these files, which will be loaded by Vampire *)
val file_id_num =ref 0;

fun new_prob_file () =  (file_id_num := (!file_id_num) + 1;"prob"^(string_of_int (!file_id_num)));


val axiom_file = File.tmp_path (Path.basic "axioms");
val clasimp_file = File.tmp_path (Path.basic "clasimp");
val hyps_file = File.tmp_path (Path.basic "hyps");
val prob_file = File.tmp_path (Path.basic "prob");
val dummy_tac = PRIMITIVE(fn thm => thm );

 
fun concat_with_and [] str = str
|   concat_with_and (x::[]) str = str^" ("^x^")"
|   concat_with_and (x::xs) str = (concat_with_and xs (str^"("^x^")"^" & "))



(**** for Isabelle/ML interface  ****)

fun is_proof_char ch = ((33 <= (ord ch)) andalso ((ord ch ) <= 126) andalso (not ((ord ch ) = 63))) orelse (ch = " ")

fun proofstring x = let val exp = explode x 
                    in
                        List.filter (is_proof_char ) exp
                    end



(*
fun call_atp_tac thms n = (tptp_inputs thms ; dummy_tac);

*)

(**** 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 thm = repeat_RS thm someI_ex;

(*********************************************************************)
(* convert clauses from "assume" to conjecture. write to file "hyps" *)
(* hypotheses of the goal currently being proved                     *)
(*********************************************************************)

fun isar_atp_h thms =
        
    let val prems = map (skolemize o make_nnf o ObjectLogic.atomize_thm) thms
        val prems' = map repeat_someI_ex prems
        val prems'' = make_clauses prems'
        val prems''' = ResAxioms.rm_Eps [] prems''
        val clss = map ResClause.make_conjecture_clause prems'''
	val (tptp_clss,tfree_litss) = ResLib.unzip (map ResClause.clause2tptp clss) 
	val tfree_lits = ResLib.flat_noDup tfree_litss
	val tfree_clss = map ResClause.tfree_clause tfree_lits 
        val hypsfile = File.sysify_path hyps_file
	val out = TextIO.openOut(hypsfile)
    in
	((ResLib.writeln_strs out (tfree_clss @ tptp_clss); TextIO.closeOut out; if !trace_res then (warning hypsfile) else ());tfree_lits) 
    end;


(*********************************************************************)
(* write out a subgoal as tptp clauses to the file "probN"           *)
(* where N is the number of this subgoal                             *)
(*********************************************************************)

fun tptp_inputs_tfrees thms n tfrees = 
    let val _ = (warning ("in tptp_inputs_tfrees 0"))
        val clss = map (ResClause.make_conjecture_clause_thm) thms
         val _ = (warning ("in tptp_inputs_tfrees 1"))
	val (tptp_clss,tfree_litss) = ResLib.unzip (map ResClause.clause2tptp clss)
        val _ = (warning ("in tptp_inputs_tfrees 2"))
	val tfree_clss = map ResClause.tfree_clause ((ResLib.flat_noDup tfree_litss) \\ tfrees) 
         val _ = (warning ("in tptp_inputs_tfrees 3"))
        val probfile = (File.sysify_path prob_file) ^ "_" ^ (string_of_int n)
	val out = TextIO.openOut(probfile)
    in
	(ResLib.writeln_strs out (tfree_clss @ tptp_clss); TextIO.closeOut out; (if !trace_res then (warning probfile) else ()))
    end;



(*********************************************************************)
(* call SPASS with settings and problem file for the current subgoal *)
(* should be modified to allow other provers to be called            *)
(*********************************************************************)

fun call_resolve_tac sign thms sg_term (childin, childout,pid) n  = let
                             val thmstring = concat_with_and (map string_of_thm thms) ""
                             val thm_no = length thms
                             val _ = warning ("number of thms is : "^(string_of_int thm_no))
                             val _ = warning ("thmstring in call_res is: "^thmstring)

                             val goalstr = Sign.string_of_term sign sg_term 
                             val goalproofstring = proofstring goalstr
                             val no_returns =List.filter not_newline ( goalproofstring)
                             val goalstring = implode no_returns
                             val _ = warning ("goalstring in call_res is: "^goalstring)
        
                             (*val prob_file =File.tmp_path (Path.basic newprobfile); *)
                             (*val _ =( warning ("calling make_clauses "))
                             val clauses = make_clauses thms
                             val _ =( warning ("called make_clauses "))*)
                             (*val _ = tptp_inputs clauses prob_file*)
                             val thmstring = concat_with_and (map string_of_thm thms) ""
                           
                             val goalstr = Sign.string_of_term sign sg_term 
                             val goalproofstring = proofstring goalstr
                             val no_returns =List.filter not_newline ( goalproofstring)
                             val goalstring = implode no_returns

                             val thmproofstring = proofstring ( thmstring)
                             val no_returns =List.filter   not_newline ( thmproofstring)
                             val thmstr = implode no_returns
                            
                             val probfile = (File.sysify_path prob_file) ^ "_" ^ (string_of_int n)
                             val outfile = TextIO.openOut(File.sysify_path(File.tmp_path (Path.basic "hellofile")))
                             val _ = TextIO.output(outfile, "prob file path is "^probfile^" thmstring is "^thmstr^" goalstring is "^goalstring);
                             val _ = TextIO.flushOut outfile;
                             val _ =  TextIO.closeOut outfile
                          in
                           (* without paramodulation *)
                           (warning ("goalstring in call_res_tac is: "^goalstring));
                           (warning ("prob file in cal_res_tac is: "^probfile));
                            Watcher.callResProvers(childout,
                            [("spass",thmstr,goalstring,"/homes/clq20/bin/SPASS",  
                             "-FullRed=0%-Auto=0%-ISRe%-ISFc%-RTaut%-RFSub%-RBSub%-DocProof", 
                             probfile)]);

                           (* with paramodulation *)
                           (*Watcher.callResProvers(childout,
                                  [("spass",thmstr,goalstring,"/homes/clq20/bin/SPASS",
                                  "-FullRed=0%-ISPm=1%-Split=0%-PObv=0%-DocProof", 
                                    prob_path)]); *)
                          (* Watcher.callResProvers(childout,
                           [("spass",thmstr,goalstring,"/homes/clq20/bin/SPASS", 
                           "-DocProof",  prob_path)]);*)
                           dummy_tac
                         end

(************************************************)
(* pass in subgoal as a term and watcher info   *)
(* process subgoal into skolemized, negated form*)
(* then call call_resolve_tac to send to ATP    *)
(************************************************)
(*
fun resolve_tac sg_term  (childin, childout,pid) = 
   let val _ = warning ("in resolve_tac ")
   in
   SELECT_GOAL
  (EVERY1 [rtac ccontr,atomize_tac,skolemize_tac,  METAHYPS(fn negs => (warning ("calling call_resolve_tac next ");dummy_tac (*call_resolve_tac negs sg_term (childin, childout,pid)*)))])
   end;

*)


(* Need to replace call_atp_tac_tfrees with call res_provers as it's the dummy one *)

(**********************************************************)
(* write out the current subgoal as a tptp file, probN,   *)
(* then call dummy_tac - should be call_res_tac           *)
(**********************************************************)
(* should call call_res_tac here, not resolve_tac *)
(* if we take tptpinputs out it gets into call_res_tac then falls over as usual after printing out goalstring. but if we leave it in it falls over here *)

(* dummy tac vs.  Doesn't call resolve_tac *)

fun call_atp_tac_tfrees sign thms n tfrees sg_term (childin, childout,pid) = 
                                         ( warning("ths for tptp: " ^ (concat_with_and (map string_of_thm thms) ""));
                                           warning("in call_atp_tac_tfrees");
                                           
                                           tptp_inputs_tfrees (make_clauses thms) n tfrees;
                                           call_resolve_tac sign thms sg_term (childin, childout, pid) n;
  					   dummy_tac);

fun atp_tac_tfrees tfrees sg_term (childin, childout,pid)  n st = 
let val sign = sign_of_thm st
    val _ = warning ("in atp_tac_tfrees ")
    val _ = warning ("sg_term :" ^ (Sign.string_of_term sign sg_term))
   
   in
SELECT_GOAL
  (EVERY1 [rtac ccontr,atomize_tac, skolemize_tac, 
  METAHYPS(fn negs => (warning("calling  call_atp_tac_tfrees with negs"
                               ^ (concat_with_and (map string_of_thm negs) ""));
           call_atp_tac_tfrees sign negs n tfrees sg_term (childin, childout,pid) ))]) n st
end;


fun isar_atp_g tfrees sg_term (childin, childout, pid) n = 
                                        
((warning("in isar_atp_g"));atp_tac_tfrees tfrees sg_term (childin, childout, pid) n);



(**********************************************)
(* recursively call atp_tac_g on all subgoals *)
(* sg_term is the nth subgoal as a term - used*)
(* in proof reconstruction                    *)
(**********************************************)

fun isar_atp_goal' thm k n tfree_lits  (childin, childout, pid) = 
                  	if (k > n) 
                        then () 
	  		else 
                           (let val  prems = prems_of thm 
                                val sg_term = get_nth n prems
                                val thmstring = string_of_thm thm
                            in   
                                 
                		(warning("in isar_atp_goal'"));
                                (warning("thmstring in isar_atp_goal: "^thmstring));
 				 isar_atp_g tfree_lits  sg_term (childin, childout, pid) k thm; 
                                 isar_atp_goal' thm (k+1) n tfree_lits  (childin, childout, pid) 
                            end);


fun isar_atp_goal thm n_subgoals tfree_lits   (childin, childout, pid) = (if (!debug) then warning (string_of_thm thm) else (isar_atp_goal' thm 1 n_subgoals tfree_lits  (childin, childout, pid) ));

(**************************************************)
(* convert clauses from "assume" to conjecture.   *)
(* i.e. apply make_clauses and then get tptp for  *)
(* any hypotheses in the goal produced by assume  *)
(* statements;                                    *)
(* write to file "hyps"                           *)
(**************************************************)


fun isar_atp_aux thms thm n_subgoals  (childin, childout, pid) = 
    let val tfree_lits = isar_atp_h thms 
    in
	(warning("in isar_atp_aux"));isar_atp_goal thm n_subgoals tfree_lits   (childin, childout, pid)
    end;

(******************************************************************)
(* called in Isar automatically                                   *)
(* writes out the current clasimpset to a tptp file               *)
(* passes all subgoals on to isar_atp_aux for further processing  *)
(* turns off xsymbol at start of function, restoring it at end    *)
(******************************************************************)

fun isar_atp' (thms, thm) =
    let val _=  (print_mode := (Library.gen_rems (op =) (! print_mode, ["xsymbols", "symbols"])))
        val _= (warning ("in isar_atp'"))
        val prems = prems_of thm
        val sign = sign_of_thm thm
        val thms_string =concat_with_and (map  string_of_thm thms) ""
        val thmstring = string_of_thm thm
        val prems_string = concat_with_and (map (Sign.string_of_term sign) prems) ""
        (* set up variables for writing out the clasimps to a tptp file *)
        val _ = write_out_clasimp (File.sysify_path axiom_file)
        (* cq: add write out clasimps to file *)
        (* cq:create watcher and pass to isar_atp_aux *)                    
        val (childin,childout,pid) = Watcher.createWatcher()
        val pidstring = string_of_int(Word.toInt (Word.fromLargeWord ( Posix.Process.pidToWord pid )))
    in
	case prems of [] => () 
		    | _ => ((warning ("initial thms: "^thms_string)); 
                           (warning ("initial thm: "^thmstring));
                           (warning ("subgoals: "^prems_string));
                           (warning ("pid: "^ pidstring))); 
                            isar_atp_aux thms thm (length prems) (childin, childout, pid) ;
                           
                           print_mode := (["xsymbols", "symbols"] @ ! print_mode)
    end;




local

fun get_thms_cs claset =
    let val clsset = rep_cs claset
	val safeEs = #safeEs clsset
	val safeIs = #safeIs clsset
	val hazEs = #hazEs clsset
	val hazIs = #hazIs clsset
    in
	safeEs @ safeIs @ hazEs @ hazIs
    end;



fun append_name name [] _ = []
  | append_name name (thm::thms) k = (Thm.name_thm ((name ^ "_" ^ (string_of_int k)),thm)) :: (append_name name thms (k+1));

fun append_names (name::names) (thms::thmss) =
    let val thms' = append_name name thms 0
    in
	thms'::(append_names names thmss)
    end;


fun get_thms_ss [] = []
  | get_thms_ss thms =
    let val names = map Thm.name_of_thm thms 
        val thms' = map (mksimps mksimps_pairs) thms
        val thms'' = append_names names thms'
    in
	ResLib.flat_noDup thms''
    end;




in


(* convert locally declared rules to axiom clauses *)
(* write axiom clauses to ax_file *)
(* what about clasimpset - it should already be in the ax file - perhaps append to ax file rather than just *)
(* write out ? Or keep as a separate file and then cat them all together in the watcher, like we do with the *)
(*claset file and prob file*)
fun isar_local_thms (delta_cs, delta_ss_thms) =
    let val thms_cs = get_thms_cs delta_cs
	val thms_ss = get_thms_ss delta_ss_thms
	val thms_clauses = ResLib.flat_noDup (map ResAxioms.clausify_axiom (thms_cs @ thms_ss))
	val clauses_strs = ResLib.flat_noDup (map ResClause.tptp_clause thms_clauses) (*string list*)
	val ax_file = File.sysify_path axiom_file
	val out = TextIO.openOut ax_file
    in
	(ResLib.writeln_strs out clauses_strs; (warning ("axiom file is: "^ax_file));TextIO.closeOut out)
    end;





(* called in Isar automatically *)

fun isar_atp (ctxt,thm) =
    let val prems = ProofContext.prems_of ctxt
        val d_cs = Classical.get_delta_claset ctxt 
        val d_ss_thms = Simplifier.get_delta_simpset ctxt
        val thmstring = string_of_thm thm
        val sg_prems = prems_of thm
        val sign = sign_of_thm thm
        val prem_no = length sg_prems
        val prems_string =  concat_with_and (map (Sign.string_of_term sign) sg_prems) ""
    in
         
          (warning ("initial thm in isar_atp: "^thmstring));
          (warning ("subgoals in isar_atp: "^prems_string));
    	   (warning ("number of subgoals in isar_atp: "^(string_of_int prem_no)));
          (isar_local_thms (d_cs,d_ss_thms); (warning("about to call isar_atp'"));
           isar_atp' (prems, thm))
    end;

end




end;

Proof.atp_hook := ResAtp.isar_atp;