src/parser/smt2/smt2.cpp

   1 /*********************                                                        */
   2 /*! \file smt2.cpp
   3  ** \verbatim
   4  ** Top contributors (to current version):
   5  **   Andrew Reynolds, Kshitij Bansal, Morgan Deters
   6  ** This file is part of the CVC4 project.
   7  ** Copyright (c) 2009-2017 by the authors listed in the file AUTHORS
   8  ** in the top-level source directory) and their institutional affiliations.
   9  ** All rights reserved.  See the file COPYING in the top-level source
  10  ** directory for licensing information.\endverbatim
  11  **
  12  ** \brief Definitions of SMT2 constants.
  13  **
  14  ** Definitions of SMT2 constants.
  15  **/
  16 #include "parser/smt2/smt2.h"
  17
  18
  19 #include "expr/type.h"
  20 #include "parser/antlr_input.h"
  21 #include "parser/parser.h"
  22 #include "parser/smt1/smt1.h"
  23 #include "parser/smt2/smt2_input.h"
  24 #include "smt/command.h"
  25 #include "util/bitvector.h"
  26
  27 #include <algorithm>
  28
  29 // ANTLR defines these, which is really bad!
  30 #undef true
  31 #undef false
  32
  33 namespace CVC4 {
  34 namespace parser {
  35
  36 Smt2::Smt2(ExprManager* exprManager, Input* input, bool strictMode, bool parseOnly) :
  37   Parser(exprManager,input,strictMode,parseOnly),
  38   d_logicSet(false) {
  39   d_unsatCoreNames.push(std::map<Expr, std::string>());
  40   if( !strictModeEnabled() ) {
  41     addTheory(Smt2::THEORY_CORE);
  42   }
  43 }
  44
  45 void Smt2::setLanguage(InputLanguage lang) {
  46   ((Smt2Input*) getInput())->setLanguage(lang);
  47 }
  48
  49 void Smt2::addArithmeticOperators() {
  50   Parser::addOperator(kind::PLUS);
  51   Parser::addOperator(kind::MINUS);
  52   Parser::addOperator(kind::UMINUS);
  53   Parser::addOperator(kind::MULT);
  54   Parser::addOperator(kind::LT);
  55   Parser::addOperator(kind::LEQ);
  56   Parser::addOperator(kind::GT);
  57   Parser::addOperator(kind::GEQ);
  58
  59   addOperator(kind::POW, "^");
  60   addOperator(kind::EXPONENTIAL, "exp");
  61   addOperator(kind::SINE, "sin");
  62   addOperator(kind::COSINE, "cos");
  63   addOperator(kind::TANGENT, "tan");
  64 }
  65
  66 void Smt2::addBitvectorOperators() {
  67   addOperator(kind::BITVECTOR_CONCAT, "concat");
  68   addOperator(kind::BITVECTOR_NOT, "bvnot");
  69   addOperator(kind::BITVECTOR_AND, "bvand");
  70   addOperator(kind::BITVECTOR_OR, "bvor");
  71   addOperator(kind::BITVECTOR_NEG, "bvneg");
  72   addOperator(kind::BITVECTOR_PLUS, "bvadd");
  73   addOperator(kind::BITVECTOR_MULT, "bvmul");
  74   addOperator(kind::BITVECTOR_UDIV, "bvudiv");
  75   addOperator(kind::BITVECTOR_UREM, "bvurem");
  76   addOperator(kind::BITVECTOR_SHL, "bvshl");
  77   addOperator(kind::BITVECTOR_LSHR, "bvlshr");
  78   addOperator(kind::BITVECTOR_ULT, "bvult");
  79   addOperator(kind::BITVECTOR_NAND, "bvnand");
  80   addOperator(kind::BITVECTOR_NOR, "bvnor");
  81   addOperator(kind::BITVECTOR_XOR, "bvxor");
  82   addOperator(kind::BITVECTOR_XNOR, "bvxnor");
  83   addOperator(kind::BITVECTOR_COMP, "bvcomp");
  84   addOperator(kind::BITVECTOR_SUB, "bvsub");
  85   addOperator(kind::BITVECTOR_SDIV, "bvsdiv");
  86   addOperator(kind::BITVECTOR_SREM, "bvsrem");
  87   addOperator(kind::BITVECTOR_SMOD, "bvsmod");
  88   addOperator(kind::BITVECTOR_ASHR, "bvashr");
  89   addOperator(kind::BITVECTOR_ULE, "bvule");
  90   addOperator(kind::BITVECTOR_UGT, "bvugt");
  91   addOperator(kind::BITVECTOR_UGE, "bvuge");
  92   addOperator(kind::BITVECTOR_SLT, "bvslt");
  93   addOperator(kind::BITVECTOR_SLE, "bvsle");
  94   addOperator(kind::BITVECTOR_SGT, "bvsgt");
  95   addOperator(kind::BITVECTOR_SGE, "bvsge");
  96   addOperator(kind::BITVECTOR_REDOR, "bvredor");
  97   addOperator(kind::BITVECTOR_REDAND, "bvredand");
  98
  99   Parser::addOperator(kind::BITVECTOR_BITOF);
 100   Parser::addOperator(kind::BITVECTOR_EXTRACT);
 101   Parser::addOperator(kind::BITVECTOR_REPEAT);
 102   Parser::addOperator(kind::BITVECTOR_ZERO_EXTEND);
 103   Parser::addOperator(kind::BITVECTOR_SIGN_EXTEND);
 104   Parser::addOperator(kind::BITVECTOR_ROTATE_LEFT);
 105   Parser::addOperator(kind::BITVECTOR_ROTATE_RIGHT);
 106
 107   Parser::addOperator(kind::INT_TO_BITVECTOR);
 108   Parser::addOperator(kind::BITVECTOR_TO_NAT);
 109 }
 110
 111 void Smt2::addStringOperators() {
 112   addOperator(kind::STRING_CONCAT, "str.++");
 113   addOperator(kind::STRING_LENGTH, "str.len");
 114   addOperator(kind::STRING_SUBSTR, "str.substr" );
 115   addOperator(kind::STRING_STRCTN, "str.contains" );
 116   addOperator(kind::STRING_CHARAT, "str.at" );
 117   addOperator(kind::STRING_STRIDOF, "str.indexof" );
 118   addOperator(kind::STRING_STRREPL, "str.replace" );
 119   addOperator(kind::STRING_PREFIX, "str.prefixof" );
 120   addOperator(kind::STRING_SUFFIX, "str.suffixof" );
 121   addOperator(kind::STRING_ITOS, "int.to.str" );
 122   addOperator(kind::STRING_STOI, "str.to.int" );
 123   addOperator(kind::STRING_IN_REGEXP, "str.in.re");
 124   addOperator(kind::STRING_TO_REGEXP, "str.to.re");
 125   addOperator(kind::REGEXP_CONCAT, "re.++");
 126   addOperator(kind::REGEXP_UNION, "re.union");
 127   addOperator(kind::REGEXP_INTER, "re.inter");
 128   addOperator(kind::REGEXP_STAR, "re.*");
 129   addOperator(kind::REGEXP_PLUS, "re.+");
 130   addOperator(kind::REGEXP_OPT, "re.opt");
 131   addOperator(kind::REGEXP_RANGE, "re.range");
 132   addOperator(kind::REGEXP_LOOP, "re.loop");
 133 }
 134
 135 void Smt2::addFloatingPointOperators() {
 136   addOperator(kind::FLOATINGPOINT_FP, "fp");
 137   addOperator(kind::FLOATINGPOINT_EQ, "fp.eq");
 138   addOperator(kind::FLOATINGPOINT_ABS, "fp.abs");
 139   addOperator(kind::FLOATINGPOINT_NEG, "fp.neg");
 140   addOperator(kind::FLOATINGPOINT_PLUS, "fp.add");
 141   addOperator(kind::FLOATINGPOINT_SUB, "fp.sub");
 142   addOperator(kind::FLOATINGPOINT_MULT, "fp.mul");
 143   addOperator(kind::FLOATINGPOINT_DIV, "fp.div");
 144   addOperator(kind::FLOATINGPOINT_FMA, "fp.fma");
 145   addOperator(kind::FLOATINGPOINT_SQRT, "fp.sqrt");
 146   addOperator(kind::FLOATINGPOINT_REM, "fp.rem");
 147   addOperator(kind::FLOATINGPOINT_RTI, "fp.roundToIntegral");
 148   addOperator(kind::FLOATINGPOINT_MIN, "fp.min");
 149   addOperator(kind::FLOATINGPOINT_MAX, "fp.max");
 150   addOperator(kind::FLOATINGPOINT_LEQ, "fp.leq");
 151   addOperator(kind::FLOATINGPOINT_LT, "fp.lt");
 152   addOperator(kind::FLOATINGPOINT_GEQ, "fp.geq");
 153   addOperator(kind::FLOATINGPOINT_GT, "fp.gt");
 154   addOperator(kind::FLOATINGPOINT_ISN, "fp.isNormal");
 155   addOperator(kind::FLOATINGPOINT_ISSN, "fp.isSubnormal");
 156   addOperator(kind::FLOATINGPOINT_ISZ, "fp.isZero");
 157   addOperator(kind::FLOATINGPOINT_ISINF, "fp.isInfinite");
 158   addOperator(kind::FLOATINGPOINT_ISNAN, "fp.isNaN");
 159   addOperator(kind::FLOATINGPOINT_ISNEG, "fp.isNegative");
 160   addOperator(kind::FLOATINGPOINT_ISPOS, "fp.isPositive");
 161   addOperator(kind::FLOATINGPOINT_TO_REAL, "fp.to_real");
 162
 163   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_IEEE_BITVECTOR);
 164   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_FLOATINGPOINT);
 165   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_REAL);
 166   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_SIGNED_BITVECTOR);
 167   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_UNSIGNED_BITVECTOR);
 168   Parser::addOperator(kind::FLOATINGPOINT_TO_UBV);
 169   Parser::addOperator(kind::FLOATINGPOINT_TO_SBV);
 170 }
 171
 172 void Smt2::addSepOperators() {
 173   addOperator(kind::SEP_STAR, "sep");
 174   addOperator(kind::SEP_PTO, "pto");
 175   addOperator(kind::SEP_WAND, "wand");
 176   addOperator(kind::SEP_EMP, "emp");
 177   Parser::addOperator(kind::SEP_STAR);
 178   Parser::addOperator(kind::SEP_PTO);
 179   Parser::addOperator(kind::SEP_WAND);
 180   Parser::addOperator(kind::SEP_EMP);
 181 }
 182
 183 void Smt2::addTheory(Theory theory) {
 184   switch(theory) {
 185   case THEORY_ARRAYS:
 186     addOperator(kind::SELECT, "select");
 187     addOperator(kind::STORE, "store");
 188     break;
 189
 190   case THEORY_BITVECTORS:
 191     addBitvectorOperators();
 192     break;
 193
 194   case THEORY_CORE:
 195     defineType("Bool", getExprManager()->booleanType());
 196     defineVar("true", getExprManager()->mkConst(true));
 197     defineVar("false", getExprManager()->mkConst(false));
 198     Parser::addOperator(kind::AND);
 199     Parser::addOperator(kind::DISTINCT);
 200     Parser::addOperator(kind::EQUAL);
 201     Parser::addOperator(kind::IMPLIES);
 202     Parser::addOperator(kind::ITE);
 203     Parser::addOperator(kind::NOT);
 204     Parser::addOperator(kind::OR);
 205     Parser::addOperator(kind::XOR);
 206     break;
 207
 208   case THEORY_REALS_INTS:
 209     defineType("Real", getExprManager()->realType());
 210     Parser::addOperator(kind::DIVISION);
 211     addOperator(kind::TO_INTEGER, "to_int");
 212     addOperator(kind::IS_INTEGER, "is_int");
 213     addOperator(kind::TO_REAL, "to_real");
 214     // falling through on purpose, to add Ints part of Reals_Ints
 215   case THEORY_INTS:
 216     defineType("Int", getExprManager()->integerType());
 217     addArithmeticOperators();
 218     addOperator(kind::INTS_DIVISION, "div");
 219     addOperator(kind::INTS_MODULUS, "mod");
 220     addOperator(kind::ABS, "abs");
 221     Parser::addOperator(kind::DIVISIBLE);
 222     break;
 223
 224   case THEORY_REALS:
 225     defineType("Real", getExprManager()->realType());
 226     addArithmeticOperators();
 227     Parser::addOperator(kind::DIVISION);
 228     break;
 229
 230   case THEORY_QUANTIFIERS:
 231     break;
 232
 233   case THEORY_SETS:
 234     addOperator(kind::UNION, "union");
 235     addOperator(kind::INTERSECTION, "intersection");
 236     addOperator(kind::SETMINUS, "setminus");
 237     addOperator(kind::SUBSET, "subset");
 238     addOperator(kind::MEMBER, "member");
 239     addOperator(kind::SINGLETON, "singleton");
 240     addOperator(kind::INSERT, "insert");
 241     addOperator(kind::CARD, "card");
 242     addOperator(kind::COMPLEMENT, "complement");
 243     break;
 244
 245   case THEORY_DATATYPES:
 246     Parser::addOperator(kind::APPLY_CONSTRUCTOR);
 247     Parser::addOperator(kind::APPLY_TESTER);
 248     Parser::addOperator(kind::APPLY_SELECTOR);
 249     Parser::addOperator(kind::APPLY_SELECTOR_TOTAL);
 250     break;
 251
 252   case THEORY_STRINGS:
 253     defineType("String", getExprManager()->stringType());
 254     defineType("Int", getExprManager()->integerType());
 255     addStringOperators();
 256     break;
 257
 258   case THEORY_UF:
 259     Parser::addOperator(kind::APPLY_UF);
 260     break;
 261
 262   case THEORY_FP:
 263     defineType("RoundingMode", getExprManager()->roundingModeType());
 264     defineType("Float16", getExprManager()->mkFloatingPointType(5, 11));
 265     defineType("Float32", getExprManager()->mkFloatingPointType(8, 24));
 266     defineType("Float64", getExprManager()->mkFloatingPointType(11, 53));
 267     defineType("Float128", getExprManager()->mkFloatingPointType(15, 113));
 268     addFloatingPointOperators();
 269     break;
 270
 271   case THEORY_SEP:
 272     addSepOperators();
 273     break;
 274
 275   default:
 276     std::stringstream ss;
 277     ss << "internal error: unsupported theory " << theory;
 278     throw ParserException(ss.str());
 279   }
 280 }
 281
 282 void Smt2::addOperator(Kind kind, const std::string& name) {
 283   Debug("parser") << "Smt2::addOperator( " << kind << ", " << name << " )"
 284                   << std::endl;
 285   Parser::addOperator(kind);
 286   operatorKindMap[name] = kind;
 287 }
 288
 289 Kind Smt2::getOperatorKind(const std::string& name) const {
 290   // precondition: isOperatorEnabled(name)
 291   return operatorKindMap.find(name)->second;
 292 }
 293
 294 bool Smt2::isOperatorEnabled(const std::string& name) const {
 295   return operatorKindMap.find(name) != operatorKindMap.end();
 296 }
 297
 298 bool Smt2::isTheoryEnabled(Theory theory) const {
 299   switch(theory) {
 300   case THEORY_ARRAYS:
 301     return d_logic.isTheoryEnabled(theory::THEORY_ARRAY);
 302   case THEORY_BITVECTORS:
 303     return d_logic.isTheoryEnabled(theory::THEORY_BV);
 304   case THEORY_CORE:
 305     return true;
 306   case THEORY_DATATYPES:
 307     return d_logic.isTheoryEnabled(theory::THEORY_DATATYPES);
 308   case THEORY_INTS:
 309     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 310       d_logic.areIntegersUsed() && ( !d_logic.areRealsUsed() );
 311   case THEORY_REALS:
 312     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 313       ( !d_logic.areIntegersUsed() ) && d_logic.areRealsUsed();
 314   case THEORY_REALS_INTS:
 315     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 316       d_logic.areIntegersUsed() && d_logic.areRealsUsed();
 317   case THEORY_QUANTIFIERS:
 318     return d_logic.isQuantified();
 319   case THEORY_SETS:
 320     return d_logic.isTheoryEnabled(theory::THEORY_SETS);
 321   case THEORY_STRINGS:
 322     return d_logic.isTheoryEnabled(theory::THEORY_STRINGS);
 323   case THEORY_UF:
 324     return d_logic.isTheoryEnabled(theory::THEORY_UF);
 325   case THEORY_FP:
 326     return d_logic.isTheoryEnabled(theory::THEORY_FP);
 327   case THEORY_SEP:
 328     return d_logic.isTheoryEnabled(theory::THEORY_SEP);
 329   default:
 330     std::stringstream ss;
 331     ss << "internal error: unsupported theory " << theory;
 332     throw ParserException(ss.str());
 333   }
 334 }
 335
 336 bool Smt2::logicIsSet() {
 337   return d_logicSet;
 338 }
 339
 340 Expr Smt2::getExpressionForNameAndType(const std::string& name, Type t) {
 341   if(sygus() && name[0]=='-' &&
 342     name.find_first_not_of("0123456789", 1) == std::string::npos) {
 343     //allow unary minus in sygus
 344     return getExprManager()->mkConst(Rational(name));
 345   }else if(isAbstractValue(name)) {
 346     return mkAbstractValue(name);
 347   }else{
 348     return Parser::getExpressionForNameAndType(name, t);
 349   }
 350 }
 351
 352 void Smt2::reset() {
 353   d_logicSet = false;
 354   d_logic = LogicInfo();
 355   operatorKindMap.clear();
 356   d_lastNamedTerm = std::pair<Expr, std::string>();
 357   d_unsatCoreNames = std::stack< std::map<Expr, std::string> >();
 358   this->Parser::reset();
 359
 360   d_unsatCoreNames.push(std::map<Expr, std::string>());
 361   if( !strictModeEnabled() ) {
 362     addTheory(Smt2::THEORY_CORE);
 363   }
 364 }
 365
 366 void Smt2::resetAssertions() {
 367   this->Parser::reset();
 368 }
 369
 370 void Smt2::setLogic(std::string name) {
 371   if(sygus()) {
 372     // sygus by default requires UF, datatypes, and LIA
 373     if(name == "Arrays") {
 374       name = "AUFDTLIA";
 375     } else if(name == "Reals") {
 376       name = "UFDTLIRA";
 377     } else if(name == "LIA") {
 378       name = "UFDTLIA";
 379     } else if(name == "LRA") {
 380       name = "UFDTLIRA";
 381     } else if(name == "LIRA") {
 382       name = "UFDTLIRA";
 383     } else if(name == "BV") {
 384       name = "UFDTBVLIA";
 385     } else if(name == "SLIA") {
 386       name = "UFDTSLIA";
 387     } else if(name == "SAT") {
 388       name = "UFDTLIA";
 389     } else if(name == "ALL" || name == "ALL_SUPPORTED") {
 390       //no change
 391     } else {
 392       std::stringstream ss;
 393       ss << "Unknown SyGuS background logic `" << name << "'";
 394       parseError(ss.str());
 395     }
 396   }
 397
 398   d_logicSet = true;
 399   if(logicIsForced()) {
 400     d_logic = getForcedLogic();
 401   } else {
 402     d_logic = name;
 403   }
 404
 405   // Core theory belongs to every logic
 406   addTheory(THEORY_CORE);
 407
 408   if(d_logic.isTheoryEnabled(theory::THEORY_UF)) {
 409     addTheory(THEORY_UF);
 410   }
 411
 412   if(d_logic.isTheoryEnabled(theory::THEORY_ARITH)) {
 413     if(d_logic.areIntegersUsed()) {
 414       if(d_logic.areRealsUsed()) {
 415         addTheory(THEORY_REALS_INTS);
 416       } else {
 417         addTheory(THEORY_INTS);
 418       }
 419     } else if(d_logic.areRealsUsed()) {
 420       addTheory(THEORY_REALS);
 421     }
 422   }
 423
 424   if(d_logic.isTheoryEnabled(theory::THEORY_ARRAY)) {
 425     addTheory(THEORY_ARRAYS);
 426   }
 427
 428   if(d_logic.isTheoryEnabled(theory::THEORY_BV)) {
 429     addTheory(THEORY_BITVECTORS);
 430   }
 431
 432   if(d_logic.isTheoryEnabled(theory::THEORY_DATATYPES)) {
 433     addTheory(THEORY_DATATYPES);
 434   }
 435
 436   if(d_logic.isTheoryEnabled(theory::THEORY_SETS)) {
 437     addTheory(THEORY_SETS);
 438   }
 439
 440   if(d_logic.isTheoryEnabled(theory::THEORY_STRINGS)) {
 441     addTheory(THEORY_STRINGS);
 442   }
 443
 444   if(d_logic.isQuantified()) {
 445     addTheory(THEORY_QUANTIFIERS);
 446   }
 447
 448   if (d_logic.isTheoryEnabled(theory::THEORY_FP)) {
 449     addTheory(THEORY_FP);
 450   }
 451
 452   if (d_logic.isTheoryEnabled(theory::THEORY_SEP)) {
 453     addTheory(THEORY_SEP);
 454   }
 455
 456 }/* Smt2::setLogic() */
 457
 458 void Smt2::setInfo(const std::string& flag, const SExpr& sexpr) {
 459   // TODO: ???
 460 }
 461
 462 void Smt2::setOption(const std::string& flag, const SExpr& sexpr) {
 463   // TODO: ???
 464 }
 465
 466 void Smt2::checkThatLogicIsSet() {
 467   if( ! logicIsSet() ) {
 468     if(strictModeEnabled()) {
 469       parseError("set-logic must appear before this point.");
 470     } else {
 471       warning("No set-logic command was given before this point.");
 472       warning("CVC4 will make all theories available.");
 473       warning("Consider setting a stricter logic for (likely) better performance.");
 474       warning("To suppress this warning in the future use (set-logic ALL).");
 475
 476       setLogic("ALL");
 477
 478       Command* c = new SetBenchmarkLogicCommand("ALL");
 479       c->setMuted(true);
 480       preemptCommand(c);
 481     }
 482   }
 483 }
 484
 485 /* The include are managed in the lexer but called in the parser */
 486 // Inspired by http://www.antlr3.org/api/C/interop.html
 487
 488 static bool newInputStream(const std::string& filename, pANTLR3_LEXER lexer) {
 489   Debug("parser") << "Including " << filename << std::endl;
 490   // Create a new input stream and take advantage of built in stream stacking
 491   // in C target runtime.
 492   //
 493   pANTLR3_INPUT_STREAM    in;
 494 #ifdef CVC4_ANTLR3_OLD_INPUT_STREAM
 495   in = antlr3AsciiFileStreamNew((pANTLR3_UINT8) filename.c_str());
 496 #else /* CVC4_ANTLR3_OLD_INPUT_STREAM */
 497   in = antlr3FileStreamNew((pANTLR3_UINT8) filename.c_str(), ANTLR3_ENC_8BIT);
 498 #endif /* CVC4_ANTLR3_OLD_INPUT_STREAM */
 499   if( in == NULL ) {
 500     Debug("parser") << "Can't open " << filename << std::endl;
 501     return false;
 502   }
 503   // Same thing as the predefined PUSHSTREAM(in);
 504   lexer->pushCharStream(lexer, in);
 505   // restart it
 506   //lexer->rec->state->tokenStartCharIndex      = -10;
 507   //lexer->emit(lexer);
 508
 509   // Note that the input stream is not closed when it EOFs, I don't bother
 510   // to do it here, but it is up to you to track streams created like this
 511   // and destroy them when the whole parse session is complete. Remember that you
 512   // don't want to do this until all tokens have been manipulated all the way through
 513   // your tree parsers etc as the token does not store the text it just refers
 514   // back to the input stream and trying to get the text for it will abort if you
 515   // close the input stream too early.
 516
 517   //TODO what said before
 518   return true;
 519 }
 520
 521 void Smt2::includeFile(const std::string& filename) {
 522   // security for online version
 523   if(!canIncludeFile()) {
 524     parseError("include-file feature was disabled for this run.");
 525   }
 526
 527   // Get the lexer
 528   AntlrInput* ai = static_cast<AntlrInput*>(getInput());
 529   pANTLR3_LEXER lexer = ai->getAntlr3Lexer();
 530   // get the name of the current stream "Does it work inside an include?"
 531   const std::string inputName = ai->getInputStreamName();
 532
 533   // Find the directory of the current input file
 534   std::string path;
 535   size_t pos = inputName.rfind('/');
 536   if(pos != std::string::npos) {
 537     path = std::string(inputName, 0, pos + 1);
 538   }
 539   path.append(filename);
 540   if(!newInputStream(path, lexer)) {
 541     parseError("Couldn't open include file `" + path + "'");
 542   }
 543 }
 544
 545 Expr Smt2::mkSygusVar(const std::string& name, const Type& type, bool isPrimed) {
 546   Expr e = mkBoundVar(name, type);
 547   d_sygusVars.push_back(e);
 548   d_sygusVarPrimed[e] = false;
 549   if( isPrimed ){
 550     std::stringstream ss;
 551     ss << name << "'";
 552     Expr ep = mkBoundVar(ss.str(), type);
 553     d_sygusVars.push_back(ep);
 554     d_sygusVarPrimed[ep] = true;
 555   }
 556   return e;
 557 }
 558
 559 void Smt2::mkSygusConstantsForType( const Type& type, std::vector<CVC4::Expr>& ops ) {
 560   if( type.isInteger() ){
 561     ops.push_back(getExprManager()->mkConst(Rational(0)));
 562     ops.push_back(getExprManager()->mkConst(Rational(1)));
 563   }else if( type.isBitVector() ){
 564     unsigned sz = ((BitVectorType)type).getSize();
 565     BitVector bval0(sz, (unsigned int)0);
 566     ops.push_back( getExprManager()->mkConst(bval0) );
 567     BitVector bval1(sz, (unsigned int)1);
 568     ops.push_back( getExprManager()->mkConst(bval1) );
 569   }else if( type.isBoolean() ){
 570     ops.push_back(getExprManager()->mkConst(true));
 571     ops.push_back(getExprManager()->mkConst(false));
 572   }
 573   //TODO : others?
 574 }
 575
 576 //  This method adds N operators to ops[index], N names to cnames[index] and N type argument vectors to cargs[index] (where typically N=1)
 577 //  This method may also add new elements pairwise into datatypes/sorts/ops/cnames/cargs in the case of non-flat gterms.
 578 void Smt2::processSygusGTerm( CVC4::SygusGTerm& sgt, int index,
 579                               std::vector< CVC4::Datatype >& datatypes,
 580                               std::vector< CVC4::Type>& sorts,
 581                               std::vector< std::vector<CVC4::Expr> >& ops,
 582                               std::vector< std::vector<std::string> >& cnames,
 583                               std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 584                               std::vector< bool >& allow_const,
 585                               std::vector< std::vector< std::string > >& unresolved_gterm_sym,
 586                               std::vector<CVC4::Expr>& sygus_vars,
 587                               std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin, std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr,
 588                               CVC4::Type& ret, bool isNested ){
 589   if( sgt.d_gterm_type==SygusGTerm::gterm_op || sgt.d_gterm_type==SygusGTerm::gterm_let ){
 590     Debug("parser-sygus") << "Add " << sgt.d_expr << " to datatype " << index << std::endl;
 591     Kind oldKind;
 592     Kind newKind = kind::UNDEFINED_KIND;
 593     //convert to UMINUS if one child of MINUS
 594     if( sgt.d_children.size()==1 && sgt.d_expr==getExprManager()->operatorOf(kind::MINUS) ){
 595       oldKind = kind::MINUS;
 596       newKind = kind::UMINUS;
 597     }
 598     /*
 599     //convert to IFF if boolean EQUAL
 600     if( sgt.d_expr==getExprManager()->operatorOf(kind::EQUAL) ){
 601       Type ctn = sgt.d_children[0].d_type;
 602       std::map< CVC4::Type, CVC4::Type >::iterator it = sygus_to_builtin.find( ctn );
 603       if( it != sygus_to_builtin.end() && it->second.isBoolean() ){
 604         oldKind = kind::EQUAL;
 605         newKind = kind::IFF;
 606       }
 607     }
 608     */
 609     if( newKind!=kind::UNDEFINED_KIND ){
 610       Expr newExpr = getExprManager()->operatorOf(newKind);
 611       Debug("parser-sygus") << "Replace " << sgt.d_expr << " with " << newExpr << std::endl;
 612       sgt.d_expr = newExpr;
 613       std::string oldName = kind::kindToString(oldKind);
 614       std::string newName = kind::kindToString(newKind);
 615       size_t pos = 0;
 616       if((pos = sgt.d_name.find(oldName, pos)) != std::string::npos){
 617         sgt.d_name.replace(pos, oldName.length(), newName);
 618       }
 619     }
 620     ops[index].push_back( sgt.d_expr );
 621     cnames[index].push_back( sgt.d_name );
 622     cargs[index].push_back( std::vector< CVC4::Type >() );
 623     for( unsigned i=0; i<sgt.d_children.size(); i++ ){
 624       std::stringstream ss;
 625       ss << datatypes[index].getName() << "_" << ops[index].size() << "_arg_" << i;
 626       std::string sub_dname = ss.str();
 627       //add datatype for child
 628       Type null_type;
 629       pushSygusDatatypeDef( null_type, sub_dname, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym );
 630       int sub_dt_index = datatypes.size()-1;
 631       //process child
 632       Type sub_ret;
 633       processSygusGTerm( sgt.d_children[i], sub_dt_index, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym,
 634                          sygus_vars, sygus_to_builtin, sygus_to_builtin_expr, sub_ret, true );
 635       //process the nested gterm (either pop the last datatype, or flatten the argument)
 636       Type tt = processSygusNestedGTerm( sub_dt_index, sub_dname, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym,
 637                                          sygus_to_builtin, sygus_to_builtin_expr, sub_ret );
 638       cargs[index].back().push_back(tt);
 639     }
 640     //if let, must create operator
 641     if( sgt.d_gterm_type==SygusGTerm::gterm_let ){
 642       processSygusLetConstructor( sgt.d_let_vars, index, datatypes, sorts, ops, cnames, cargs,
 643                                   sygus_vars, sygus_to_builtin, sygus_to_builtin_expr );
 644     }
 645   }else if( sgt.d_gterm_type==SygusGTerm::gterm_constant ){
 646     if( sgt.getNumChildren()!=0 ){
 647       parseError("Bad syntax for Sygus Constant.");
 648     }
 649     std::vector< Expr > consts;
 650     mkSygusConstantsForType( sgt.d_type, consts );
 651     Debug("parser-sygus") << "...made " << consts.size() << " constants." << std::endl;
 652     for( unsigned i=0; i<consts.size(); i++ ){
 653       std::stringstream ss;
 654       ss << consts[i];
 655       Debug("parser-sygus") << "...add for constant " << ss.str() << std::endl;
 656       ops[index].push_back( consts[i] );
 657       cnames[index].push_back( ss.str() );
 658       cargs[index].push_back( std::vector< CVC4::Type >() );
 659     }
 660     allow_const[index] = true;
 661   }else if( sgt.d_gterm_type==SygusGTerm::gterm_variable || sgt.d_gterm_type==SygusGTerm::gterm_input_variable ){
 662     if( sgt.getNumChildren()!=0 ){
 663       parseError("Bad syntax for Sygus Variable.");
 664     }
 665     Debug("parser-sygus") << "...process " << sygus_vars.size() << " variables." << std::endl;
 666     for( unsigned i=0; i<sygus_vars.size(); i++ ){
 667       if( sygus_vars[i].getType()==sgt.d_type ){
 668         std::stringstream ss;
 669         ss << sygus_vars[i];
 670         Debug("parser-sygus") << "...add for variable " << ss.str() << std::endl;
 671         ops[index].push_back( sygus_vars[i] );
 672         cnames[index].push_back( ss.str() );
 673         cargs[index].push_back( std::vector< CVC4::Type >() );
 674       }
 675     }
 676   }else if( sgt.d_gterm_type==SygusGTerm::gterm_nested_sort ){
 677     ret = sgt.d_type;
 678   }else if( sgt.d_gterm_type==SygusGTerm::gterm_unresolved ){
 679     if( isNested ){
 680       if( isUnresolvedType(sgt.d_name) ){
 681         ret = getSort(sgt.d_name);
 682       }else{
 683         //nested, unresolved symbol...fail
 684         std::stringstream ss;
 685         ss << "Cannot handle nested unresolved symbol " << sgt.d_name << std::endl;
 686         parseError(ss.str());
 687       }
 688     }else{
 689       //will resolve when adding constructors
 690       unresolved_gterm_sym[index].push_back(sgt.d_name);
 691     }
 692   }else if( sgt.d_gterm_type==SygusGTerm::gterm_ignore ){
 693
 694   }
 695 }
 696
 697 bool Smt2::pushSygusDatatypeDef( Type t, std::string& dname,
 698                                   std::vector< CVC4::Datatype >& datatypes,
 699                                   std::vector< CVC4::Type>& sorts,
 700                                   std::vector< std::vector<CVC4::Expr> >& ops,
 701                                   std::vector< std::vector<std::string> >& cnames,
 702                                   std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 703                                   std::vector< bool >& allow_const,
 704                                   std::vector< std::vector< std::string > >& unresolved_gterm_sym ){
 705   sorts.push_back(t);
 706   datatypes.push_back(Datatype(dname));
 707   ops.push_back(std::vector<Expr>());
 708   cnames.push_back(std::vector<std::string>());
 709   cargs.push_back(std::vector<std::vector<CVC4::Type> >());
 710   allow_const.push_back(false);
 711   unresolved_gterm_sym.push_back(std::vector< std::string >());
 712   return true;
 713 }
 714
 715 bool Smt2::popSygusDatatypeDef( std::vector< CVC4::Datatype >& datatypes,
 716                                  std::vector< CVC4::Type>& sorts,
 717                                  std::vector< std::vector<CVC4::Expr> >& ops,
 718                                  std::vector< std::vector<std::string> >& cnames,
 719                                  std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 720                                  std::vector< bool >& allow_const,
 721                                  std::vector< std::vector< std::string > >& unresolved_gterm_sym ){
 722   sorts.pop_back();
 723   datatypes.pop_back();
 724   ops.pop_back();
 725   cnames.pop_back();
 726   cargs.pop_back();
 727   allow_const.pop_back();
 728   unresolved_gterm_sym.pop_back();
 729   return true;
 730 }
 731
 732 Type Smt2::processSygusNestedGTerm( int sub_dt_index, std::string& sub_dname, std::vector< CVC4::Datatype >& datatypes,
 733                                     std::vector< CVC4::Type>& sorts,
 734                                     std::vector< std::vector<CVC4::Expr> >& ops,
 735                                     std::vector< std::vector<std::string> >& cnames,
 736                                     std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 737                                     std::vector< bool >& allow_const,
 738                                     std::vector< std::vector< std::string > >& unresolved_gterm_sym,
 739                                     std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin,
 740                                     std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr, Type sub_ret ) {
 741   Type t = sub_ret;
 742   Debug("parser-sygus") << "Argument is ";
 743   if( t.isNull() ){
 744     //then, it is the datatype we constructed, which should have a single constructor
 745     t = mkUnresolvedType(sub_dname);
 746     Debug("parser-sygus") << "inline flattening of (auxiliary, local) datatype " << t << std::endl;
 747     Debug("parser-sygus") << ": to compute type, construct ground term witnessing the grammar, #cons=" << cargs[sub_dt_index].size() << std::endl;
 748     if( cargs[sub_dt_index].empty() ){
 749       parseError(std::string("Internal error : datatype for nested gterm does not have a constructor."));
 750     }
 751     Expr sop = ops[sub_dt_index][0];
 752     Type curr_t;
 753     if( sop.getKind() != kind::BUILTIN && ( sop.isConst() || cargs[sub_dt_index][0].empty() ) ){
 754       curr_t = sop.getType();
 755       Debug("parser-sygus") << ": it is constant/0-arg cons " << sop << " with type " << sop.getType() << ", debug=" << sop.isConst() << " " << cargs[sub_dt_index][0].size() << std::endl;
 756       sygus_to_builtin_expr[t] = sop;
 757       //store that term sop has dedicated sygus type t
 758       if( d_sygus_bound_var_type.find( sop )==d_sygus_bound_var_type.end() ){
 759         d_sygus_bound_var_type[sop] = t;
 760       }
 761     }else{
 762       std::vector< Expr > children;
 763       if( sop.getKind() != kind::BUILTIN ){
 764         children.push_back( sop );
 765       }
 766       for( unsigned i=0; i<cargs[sub_dt_index][0].size(); i++ ){
 767         std::map< CVC4::Type, CVC4::Expr >::iterator it = sygus_to_builtin_expr.find( cargs[sub_dt_index][0][i] );
 768         if( it==sygus_to_builtin_expr.end() ){
 769           if( sygus_to_builtin.find( cargs[sub_dt_index][0][i] )==sygus_to_builtin.end() ){
 770             std::stringstream ss;
 771             ss << "Missing builtin type for type " << cargs[sub_dt_index][0][i] << "!" << std::endl;
 772             ss << "Builtin types are currently : " << std::endl;
 773             for( std::map< CVC4::Type, CVC4::Type >::iterator itb = sygus_to_builtin.begin(); itb != sygus_to_builtin.end(); ++itb ){
 774               ss << "  " << itb->first << " -> " << itb->second << std::endl;
 775             }
 776             parseError(ss.str());
 777           }
 778           Type bt = sygus_to_builtin[cargs[sub_dt_index][0][i]];
 779           Debug("parser-sygus") << ":  child " << i << " introduce type elem for " << cargs[sub_dt_index][0][i] << " " << bt << std::endl;
 780           std::stringstream ss;
 781           ss << t << "_x_" << i;
 782           Expr bv = mkBoundVar(ss.str(), bt);
 783           children.push_back( bv );
 784           d_sygus_bound_var_type[bv] = cargs[sub_dt_index][0][i];
 785         }else{
 786           Debug("parser-sygus") << ":  child " << i << " existing sygus to builtin expr : " << it->second << std::endl;
 787           children.push_back( it->second );
 788         }
 789       }
 790       Kind sk = sop.getKind() != kind::BUILTIN ? kind::APPLY : getExprManager()->operatorToKind(sop);
 791       Debug("parser-sygus") << ": operator " << sop << " with " << sop.getKind() << " " << sk << std::endl;
 792       Expr e = getExprManager()->mkExpr( sk, children );
 793       Debug("parser-sygus") << ": constructed " << e << ", which has type " << e.getType() << std::endl;
 794       curr_t = e.getType();
 795       sygus_to_builtin_expr[t] = e;
 796     }
 797     sorts[sub_dt_index] = curr_t;
 798     sygus_to_builtin[t] = curr_t;
 799   }else{
 800     Debug("parser-sygus") << "simple argument " << t << std::endl;
 801     Debug("parser-sygus") << "...removing " << datatypes.back().getName() << std::endl;
 802     //otherwise, datatype was unecessary
 803     //pop argument datatype definition
 804     popSygusDatatypeDef( datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym );
 805   }
 806   return t;
 807 }
 808
 809 void Smt2::processSygusLetConstructor( std::vector< CVC4::Expr >& let_vars,
 810                                        int index,
 811                                        std::vector< CVC4::Datatype >& datatypes,
 812                                        std::vector< CVC4::Type>& sorts,
 813                                        std::vector< std::vector<CVC4::Expr> >& ops,
 814                                        std::vector< std::vector<std::string> >& cnames,
 815                                        std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 816                                        std::vector<CVC4::Expr>& sygus_vars,
 817                                        std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin,
 818                                        std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr ) {
 819   std::vector< CVC4::Expr > let_define_args;
 820   Expr let_body;
 821   int dindex = cargs[index].size()-1;
 822   Debug("parser-sygus") << "Process let constructor for datatype " << datatypes[index].getName() << ", #subtypes = " << cargs[index][dindex].size() << std::endl;
 823   for( unsigned i=0; i<cargs[index][dindex].size(); i++ ){
 824     Debug("parser-sygus") << "  " << i << " : " << cargs[index][dindex][i] << std::endl;
 825     if( i+1==cargs[index][dindex].size() ){
 826       std::map< CVC4::Type, CVC4::Expr >::iterator it = sygus_to_builtin_expr.find( cargs[index][dindex][i] );
 827       if( it!=sygus_to_builtin_expr.end() ){
 828         let_body = it->second;
 829       }else{
 830         std::stringstream ss;
 831         ss << datatypes[index].getName() << "_body";
 832         let_body = mkBoundVar(ss.str(), sygus_to_builtin[cargs[index][dindex][i]]);
 833         d_sygus_bound_var_type[let_body] = cargs[index][dindex][i];
 834       }
 835     }
 836   }
 837   Debug("parser-sygus") << std::endl;
 838   Debug("parser-sygus") << "Body is " << let_body << std::endl;
 839   Debug("parser-sygus") << "# let vars = " << let_vars.size() << std::endl;
 840   for( unsigned i=0; i<let_vars.size(); i++ ){
 841     Debug("parser-sygus") << "  let var " << i << " : " << let_vars[i] << " " << let_vars[i].getType() << std::endl;
 842     let_define_args.push_back( let_vars[i] );
 843   }
 844   /*
 845   Debug("parser-sygus") << "index = " << index << ", start index = " << start_index << ", #Current datatypes = " << datatypes.size() << std::endl;
 846   for( unsigned i=start_index; i<datatypes.size(); i++ ){
 847     Debug("parser-sygus") << "  datatype " << i << " : " << datatypes[i].getName() << ", #cons = " << cargs[i].size() << std::endl;
 848     if( !cargs[i].empty() ){
 849       Debug("parser-sygus") << "  operator 0 is " << ops[i][0] << std::endl;
 850       Debug("parser-sygus") << "  cons 0 has " << cargs[i][0].size() << " sub fields." << std::endl;
 851       for( unsigned j=0; j<cargs[i][0].size(); j++ ){
 852         Type bt = sygus_to_builtin[cargs[i][0][j]];
 853         Debug("parser-sygus") << "    cons 0, selector " << j << " : " << cargs[i][0][j] << " " << bt << std::endl;
 854       }
 855     }
 856   }
 857   */
 858   //last argument is the return, pop
 859   cargs[index][dindex].pop_back();
 860   collectSygusLetArgs( let_body, cargs[index][dindex], let_define_args );
 861
 862   Debug("parser-sygus") << "Make define-fun with " << cargs[index][dindex].size() << " arguments..." << std::endl;
 863   std::vector<CVC4::Type> fsorts;
 864   for( unsigned i=0; i<cargs[index][dindex].size(); i++ ){
 865     Debug("parser-sygus") << "  " << i << " : " << let_define_args[i] << " " << let_define_args[i].getType() << " " << cargs[index][dindex][i] << std::endl;
 866     fsorts.push_back(let_define_args[i].getType());
 867   }
 868
 869   Type ft = getExprManager()->mkFunctionType(fsorts, let_body.getType());
 870   std::stringstream ss;
 871   ss << datatypes[index].getName() << "_let";
 872   Expr let_func = mkFunction(ss.str(), ft, ExprManager::VAR_FLAG_DEFINED);
 873   d_sygus_defined_funs.push_back( let_func );
 874   preemptCommand( new DefineFunctionCommand(ss.str(), let_func, let_define_args, let_body) );
 875
 876   ops[index].pop_back();
 877   ops[index].push_back( let_func );
 878   cnames[index].pop_back();
 879   cnames[index].push_back(ss.str());
 880
 881   //mark function as let constructor
 882   d_sygus_let_func_to_vars[let_func].insert( d_sygus_let_func_to_vars[let_func].end(), let_define_args.begin(), let_define_args.end() );
 883   d_sygus_let_func_to_body[let_func] = let_body;
 884   d_sygus_let_func_to_num_input_vars[let_func] = let_vars.size();
 885 }
 886
 887
 888 void Smt2::collectSygusLetArgs( CVC4::Expr e, std::vector< CVC4::Type >& sygusArgs, std::vector< CVC4::Expr >& builtinArgs ) {
 889   if( e.getKind()==kind::BOUND_VARIABLE ){
 890     if( std::find( builtinArgs.begin(), builtinArgs.end(), e )==builtinArgs.end() ){
 891       builtinArgs.push_back( e );
 892       sygusArgs.push_back( d_sygus_bound_var_type[e] );
 893       if( d_sygus_bound_var_type[e].isNull() ){
 894         std::stringstream ss;
 895         ss << "While constructing body of let gterm, can't map " << e << " to sygus type." << std::endl;
 896         parseError(ss.str());
 897       }
 898     }
 899   }else{
 900     for( unsigned i=0; i<e.getNumChildren(); i++ ){
 901       collectSygusLetArgs( e[i], sygusArgs, builtinArgs );
 902     }
 903   }
 904 }
 905
 906 void Smt2::setSygusStartIndex( std::string& fun, int startIndex,
 907                                std::vector< CVC4::Datatype >& datatypes,
 908                                std::vector< CVC4::Type>& sorts,
 909                                std::vector< std::vector<CVC4::Expr> >& ops ) {
 910   if( startIndex>0 ){
 911     CVC4::Datatype tmp_dt = datatypes[0];
 912     Type tmp_sort = sorts[0];
 913     std::vector< Expr > tmp_ops;
 914     tmp_ops.insert( tmp_ops.end(), ops[0].begin(), ops[0].end() );
 915     datatypes[0] = datatypes[startIndex];
 916     sorts[0] = sorts[startIndex];
 917     ops[0].clear();
 918     ops[0].insert( ops[0].end(), ops[startIndex].begin(), ops[startIndex].end() );
 919     datatypes[startIndex] = tmp_dt;
 920     sorts[startIndex] = tmp_sort;
 921     ops[startIndex].clear();
 922     ops[startIndex].insert( ops[startIndex].begin(), tmp_ops.begin(), tmp_ops.end() );
 923   }else if( startIndex<0 ){
 924     std::stringstream ss;
 925     ss << "warning: no symbol named Start for synth-fun " << fun << std::endl;
 926     warning(ss.str());
 927   }
 928 }
 929
 930 void Smt2::mkSygusDatatype( CVC4::Datatype& dt, std::vector<CVC4::Expr>& ops,
 931                             std::vector<std::string>& cnames, std::vector< std::vector< CVC4::Type > >& cargs,
 932                             std::vector<std::string>& unresolved_gterm_sym,
 933                             std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin ) {
 934   Debug("parser-sygus") << "Making sygus datatype " << dt.getName() << std::endl;
 935   Debug("parser-sygus") << "  add constructors..." << std::endl;
 936   std::vector<std::string> df_name;
 937   std::vector<CVC4::Expr> df_op;
 938   std::vector< std::vector<Expr> > df_let_args;
 939   std::vector< Expr > df_let_body;
 940   //dt.mkSygusConstructors( ops, cnames, cargs, sygus_to_builtin,
 941   //                        d_sygus_let_func_to_vars, d_sygus_let_func_to_body, d_sygus_let_func_to_num_input_vars,
 942   //                        df_name, df_op, df_let_args, df_let_body );
 943
 944   Debug("parser-sygus") << "SMT2 sygus parser : Making constructors for sygus datatype " << dt.getName() << std::endl;
 945   Debug("parser-sygus") << "  add constructors..." << std::endl;
 946   for( int i=0; i<(int)cnames.size(); i++ ){
 947     bool is_dup = false;
 948     bool is_dup_op = false;
 949     Expr let_body;
 950     std::vector< Expr > let_args;
 951     unsigned let_num_input_args = 0;
 952     for( int j=0; j<i; j++ ){
 953       if( ops[i]==ops[j] ){
 954         is_dup_op = true;
 955         if( cargs[i].size()==cargs[j].size() ){
 956           is_dup = true;
 957           for( unsigned k=0; k<cargs[i].size(); k++ ){
 958             if( cargs[i][k]!=cargs[j][k] ){
 959               is_dup = false;
 960               break;
 961             }
 962           }
 963         }
 964         if( is_dup ){
 965           break;
 966         }
 967       }
 968     }
 969     if( is_dup ){
 970       Debug("parser-sygus") << "--> Duplicate gterm : " << ops[i] << " at " << i << std::endl;
 971       ops.erase( ops.begin() + i, ops.begin() + i + 1 );
 972       cnames.erase( cnames.begin() + i, cnames.begin() + i + 1 );
 973       cargs.erase( cargs.begin() + i, cargs.begin() + i + 1 );
 974       i--;
 975     }else if( is_dup_op ){
 976       Debug("parser-sygus") << "--> Duplicate gterm operator : " << ops[i] << " at " << i << std::endl;
 977       //make into define-fun
 978       std::vector<CVC4::Type> fsorts;
 979       for( unsigned j=0; j<cargs[i].size(); j++ ){
 980         Type bt = sygus_to_builtin[cargs[i][j]];
 981         std::stringstream ss;
 982         ss << dt.getName() << "_x_" << i << "_" << j;
 983         Expr v = mkBoundVar(ss.str(), bt);
 984         let_args.push_back( v );
 985         fsorts.push_back( bt );
 986         Debug("parser-sygus") << ": var " << i << " " << v << " with type " << bt << " from " << cargs[i][j] << std::endl;
 987       }
 988       //make the let_body
 989       std::vector< Expr > children;
 990       if( ops[i].getKind() != kind::BUILTIN ){
 991         children.push_back( ops[i] );
 992       }
 993       children.insert( children.end(), let_args.begin(), let_args.end() );
 994       Kind sk = ops[i].getKind() != kind::BUILTIN ? kind::APPLY : getExprManager()->operatorToKind(ops[i]);
 995       Debug("parser-sygus") << ": replace " << ops[i] << " " << ops[i].getKind() << " " << sk << std::endl;
 996       let_body = getExprManager()->mkExpr( sk, children );
 997       Debug("parser-sygus") << ": new body of function is " << let_body << std::endl;
 998
 999       Type ft = getExprManager()->mkFunctionType(fsorts, let_body.getType());
1000       Debug("parser-sygus") << ": function type is " << ft << std::endl;
1001       std::stringstream ss;
1002       ss << dt.getName() << "_df_" << i;
1003       //replace operator and name
1004       ops[i] = mkFunction(ss.str(), ft, ExprManager::VAR_FLAG_DEFINED);
1005       cnames[i] = ss.str();
1006       // indicate we need a define function
1007       df_name.push_back( ss.str() );
1008       df_op.push_back( ops[i] );
1009       df_let_args.push_back( let_args );
1010       df_let_body.push_back( let_body );
1011
1012       //d_sygus_defined_funs.push_back( ops[i] );
1013       //preemptCommand( new DefineFunctionCommand(ss.str(), ops[i], let_args, let_body) );
1014       dt.addSygusConstructor( ops[i], cnames[i], cargs[i], let_body, let_args, 0 );
1015     }else{
1016       std::map< CVC4::Expr, CVC4::Expr >::iterator it = d_sygus_let_func_to_body.find( ops[i] );
1017       if( it!=d_sygus_let_func_to_body.end() ){
1018         let_body = it->second;
1019         let_args.insert( let_args.end(), d_sygus_let_func_to_vars[ops[i]].begin(), d_sygus_let_func_to_vars[ops[i]].end() );
1020         let_num_input_args = d_sygus_let_func_to_num_input_vars[ops[i]];
1021       }
1022       dt.addSygusConstructor( ops[i], cnames[i], cargs[i], let_body, let_args, let_num_input_args );
1023     }
1024   }
1025
1026   Debug("parser-sygus") << "  add constructors for unresolved symbols..." << std::endl;
1027   if( !unresolved_gterm_sym.empty() ){
1028     std::vector< Type > types;
1029     Debug("parser-sygus") << "...resolve " << unresolved_gterm_sym.size() << " symbols..." << std::endl;
1030     for( unsigned i=0; i<unresolved_gterm_sym.size(); i++ ){
1031       Debug("parser-sygus") << "  resolve : " << unresolved_gterm_sym[i] << std::endl;
1032       if( isUnresolvedType(unresolved_gterm_sym[i]) ){
1033         Debug("parser-sygus") << "    it is an unresolved type." << std::endl;
1034         Type t = getSort(unresolved_gterm_sym[i]);
1035         if( std::find( types.begin(), types.end(), t )==types.end() ){
1036           types.push_back( t );
1037           //identity element
1038           Type bt = dt.getSygusType();
1039           Debug("parser-sygus") << ":  make identity function for " << bt << ", argument type " << t << std::endl;
1040           std::stringstream ss;
1041           ss << t << "_x_id";
1042           Expr let_body = mkBoundVar(ss.str(), bt);
1043           std::vector< Expr > let_args;
1044           let_args.push_back( let_body );
1045           //make the identity function
1046           Type ft = getExprManager()->mkFunctionType(bt, bt);
1047           std::stringstream ssid;
1048           ssid << unresolved_gterm_sym[i] << "_id";
1049           Expr id_op = mkFunction(ss.str(), ft, ExprManager::VAR_FLAG_DEFINED);
1050           // indicate we need a define function
1051           df_name.push_back( ssid.str() );
1052           df_op.push_back( id_op );
1053           df_let_args.push_back( let_args );
1054           df_let_body.push_back( let_body );
1055
1056           //d_sygus_defined_funs.push_back( id_op );
1057           //preemptCommand( new DefineFunctionCommand(ssid.str(), id_op, let_args, let_body) );
1058           //make the sygus argument list
1059           std::vector< Type > id_carg;
1060           id_carg.push_back( t );
1061           dt.addSygusConstructor( id_op, unresolved_gterm_sym[i], id_carg, let_body, let_args, 0 );
1062           //add to operators
1063           ops.push_back( id_op );
1064         }
1065       }else{
1066         Debug("parser-sygus") << "    ignore. (likely a free let variable)" << std::endl;
1067       }
1068     }
1069   }
1070
1071
1072   for( unsigned i=0; i<df_name.size(); i++ ){
1073     d_sygus_defined_funs.push_back( df_op[i] );
1074     preemptCommand( new DefineFunctionCommand(df_name[i], df_op[i], df_let_args[i], df_let_body[i]) );
1075   }
1076 }
1077
1078 const void Smt2::getSygusPrimedVars( std::vector<Expr>& vars, bool isPrimed ) {
1079   for( unsigned i=0; i<d_sygusVars.size(); i++ ){
1080     Expr v = d_sygusVars[i];
1081     std::map< Expr, bool >::iterator it = d_sygusVarPrimed.find( v );
1082     if( it!=d_sygusVarPrimed.end() ){
1083       if( it->second==isPrimed ){
1084         vars.push_back( v );
1085       }
1086     }else{
1087       //should never happen
1088     }
1089   }
1090 }
1091
1092 const void Smt2::addSygusFunSymbol( Type t, Expr synth_fun ){
1093   //FIXME #1205 : we should not create a proxy, instead quantify on synth_fun and set Type t as an attribute
1094   Expr sym = mkBoundVar("sfproxy", t);
1095   d_sygusFunSymbols.push_back(sym);
1096
1097   std::vector< Expr > attr_value;
1098   attr_value.push_back( synth_fun );
1099   Command* cattr = new SetUserAttributeCommand("sygus-synth-fun", sym, attr_value);
1100   cattr->setMuted(true);
1101   preemptCommand(cattr);
1102 }
1103
1104 }/* CVC4::parser namespace */
1105 }/* CVC4 namespace */