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) 2009-2019 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 #include "api/cvc4cpp.h"
  19 #include "expr/type.h"
  20 #include "options/options.h"
  21 #include "parser/antlr_input.h"
  22 #include "parser/parser.h"
  23 #include "parser/smt1/smt1.h"
  24 #include "parser/smt2/smt2_input.h"
  25 #include "printer/sygus_print_callback.h"
  26 #include "smt/command.h"
  27 #include "util/bitvector.h"
  28
  29 #include <algorithm>
  30
  31 // ANTLR defines these, which is really bad!
  32 #undef true
  33 #undef false
  34
  35 namespace CVC4 {
  36 namespace parser {
  37
  38 Smt2::Smt2(api::Solver* solver, Input* input, bool strictMode, bool parseOnly)
  39     : Parser(solver, input, strictMode, parseOnly), d_logicSet(false)
  40 {
  41   if (!strictModeEnabled())
  42   {
  43     addTheory(Smt2::THEORY_CORE);
  44   }
  45 }
  46
  47 void Smt2::addArithmeticOperators() {
  48   Parser::addOperator(kind::PLUS);
  49   Parser::addOperator(kind::MINUS);
  50   Parser::addOperator(kind::UMINUS);
  51   Parser::addOperator(kind::MULT);
  52   Parser::addOperator(kind::LT);
  53   Parser::addOperator(kind::LEQ);
  54   Parser::addOperator(kind::GT);
  55   Parser::addOperator(kind::GEQ);
  56
  57   // NOTE: this operator is non-standard
  58   addOperator(kind::POW, "^");
  59 }
  60
  61 void Smt2::addTranscendentalOperators()
  62 {
  63   addOperator(kind::EXPONENTIAL, "exp");
  64   addOperator(kind::SINE, "sin");
  65   addOperator(kind::COSINE, "cos");
  66   addOperator(kind::TANGENT, "tan");
  67   addOperator(kind::COSECANT, "csc");
  68   addOperator(kind::SECANT, "sec");
  69   addOperator(kind::COTANGENT, "cot");
  70   addOperator(kind::ARCSINE, "arcsin");
  71   addOperator(kind::ARCCOSINE, "arccos");
  72   addOperator(kind::ARCTANGENT, "arctan");
  73   addOperator(kind::ARCCOSECANT, "arccsc");
  74   addOperator(kind::ARCSECANT, "arcsec");
  75   addOperator(kind::ARCCOTANGENT, "arccot");
  76   addOperator(kind::SQRT, "sqrt");
  77 }
  78
  79 void Smt2::addBitvectorOperators() {
  80   addOperator(kind::BITVECTOR_CONCAT, "concat");
  81   addOperator(kind::BITVECTOR_NOT, "bvnot");
  82   addOperator(kind::BITVECTOR_AND, "bvand");
  83   addOperator(kind::BITVECTOR_OR, "bvor");
  84   addOperator(kind::BITVECTOR_NEG, "bvneg");
  85   addOperator(kind::BITVECTOR_PLUS, "bvadd");
  86   addOperator(kind::BITVECTOR_MULT, "bvmul");
  87   addOperator(kind::BITVECTOR_UDIV, "bvudiv");
  88   addOperator(kind::BITVECTOR_UREM, "bvurem");
  89   addOperator(kind::BITVECTOR_SHL, "bvshl");
  90   addOperator(kind::BITVECTOR_LSHR, "bvlshr");
  91   addOperator(kind::BITVECTOR_ULT, "bvult");
  92   addOperator(kind::BITVECTOR_NAND, "bvnand");
  93   addOperator(kind::BITVECTOR_NOR, "bvnor");
  94   addOperator(kind::BITVECTOR_XOR, "bvxor");
  95   addOperator(kind::BITVECTOR_XNOR, "bvxnor");
  96   addOperator(kind::BITVECTOR_COMP, "bvcomp");
  97   addOperator(kind::BITVECTOR_SUB, "bvsub");
  98   addOperator(kind::BITVECTOR_SDIV, "bvsdiv");
  99   addOperator(kind::BITVECTOR_SREM, "bvsrem");
 100   addOperator(kind::BITVECTOR_SMOD, "bvsmod");
 101   addOperator(kind::BITVECTOR_ASHR, "bvashr");
 102   addOperator(kind::BITVECTOR_ULE, "bvule");
 103   addOperator(kind::BITVECTOR_UGT, "bvugt");
 104   addOperator(kind::BITVECTOR_UGE, "bvuge");
 105   addOperator(kind::BITVECTOR_SLT, "bvslt");
 106   addOperator(kind::BITVECTOR_SLE, "bvsle");
 107   addOperator(kind::BITVECTOR_SGT, "bvsgt");
 108   addOperator(kind::BITVECTOR_SGE, "bvsge");
 109   addOperator(kind::BITVECTOR_REDOR, "bvredor");
 110   addOperator(kind::BITVECTOR_REDAND, "bvredand");
 111
 112   Parser::addOperator(kind::BITVECTOR_BITOF);
 113   Parser::addOperator(kind::BITVECTOR_EXTRACT);
 114   Parser::addOperator(kind::BITVECTOR_REPEAT);
 115   Parser::addOperator(kind::BITVECTOR_ZERO_EXTEND);
 116   Parser::addOperator(kind::BITVECTOR_SIGN_EXTEND);
 117   Parser::addOperator(kind::BITVECTOR_ROTATE_LEFT);
 118   Parser::addOperator(kind::BITVECTOR_ROTATE_RIGHT);
 119
 120   Parser::addOperator(kind::INT_TO_BITVECTOR);
 121   Parser::addOperator(kind::BITVECTOR_TO_NAT);
 122 }
 123
 124 void Smt2::addStringOperators() {
 125   addOperator(kind::STRING_CONCAT, "str.++");
 126   addOperator(kind::STRING_LENGTH, "str.len");
 127   addOperator(kind::STRING_SUBSTR, "str.substr" );
 128   addOperator(kind::STRING_STRCTN, "str.contains" );
 129   addOperator(kind::STRING_CHARAT, "str.at" );
 130   addOperator(kind::STRING_STRIDOF, "str.indexof" );
 131   addOperator(kind::STRING_STRREPL, "str.replace" );
 132   addOperator(kind::STRING_STRREPLALL, "str.replaceall");
 133   addOperator(kind::STRING_PREFIX, "str.prefixof" );
 134   addOperator(kind::STRING_SUFFIX, "str.suffixof" );
 135   // at the moment, we only use this syntax for smt2.6.1
 136   if (getLanguage() == language::input::LANG_SMTLIB_V2_6_1)
 137   {
 138     addOperator(kind::STRING_ITOS, "str.from-int");
 139     addOperator(kind::STRING_STOI, "str.to-int");
 140     addOperator(kind::STRING_IN_REGEXP, "str.in-re");
 141     addOperator(kind::STRING_TO_REGEXP, "str.to-re");
 142   }
 143   else
 144   {
 145     addOperator(kind::STRING_ITOS, "int.to.str");
 146     addOperator(kind::STRING_STOI, "str.to.int");
 147     addOperator(kind::STRING_IN_REGEXP, "str.in.re");
 148     addOperator(kind::STRING_TO_REGEXP, "str.to.re");
 149   }
 150
 151   addOperator(kind::REGEXP_CONCAT, "re.++");
 152   addOperator(kind::REGEXP_UNION, "re.union");
 153   addOperator(kind::REGEXP_INTER, "re.inter");
 154   addOperator(kind::REGEXP_STAR, "re.*");
 155   addOperator(kind::REGEXP_PLUS, "re.+");
 156   addOperator(kind::REGEXP_OPT, "re.opt");
 157   addOperator(kind::REGEXP_RANGE, "re.range");
 158   addOperator(kind::REGEXP_LOOP, "re.loop");
 159   addOperator(kind::STRING_CODE, "str.code");
 160   addOperator(kind::STRING_LT, "str.<");
 161   addOperator(kind::STRING_LEQ, "str.<=");
 162 }
 163
 164 void Smt2::addFloatingPointOperators() {
 165   addOperator(kind::FLOATINGPOINT_FP, "fp");
 166   addOperator(kind::FLOATINGPOINT_EQ, "fp.eq");
 167   addOperator(kind::FLOATINGPOINT_ABS, "fp.abs");
 168   addOperator(kind::FLOATINGPOINT_NEG, "fp.neg");
 169   addOperator(kind::FLOATINGPOINT_PLUS, "fp.add");
 170   addOperator(kind::FLOATINGPOINT_SUB, "fp.sub");
 171   addOperator(kind::FLOATINGPOINT_MULT, "fp.mul");
 172   addOperator(kind::FLOATINGPOINT_DIV, "fp.div");
 173   addOperator(kind::FLOATINGPOINT_FMA, "fp.fma");
 174   addOperator(kind::FLOATINGPOINT_SQRT, "fp.sqrt");
 175   addOperator(kind::FLOATINGPOINT_REM, "fp.rem");
 176   addOperator(kind::FLOATINGPOINT_RTI, "fp.roundToIntegral");
 177   addOperator(kind::FLOATINGPOINT_MIN, "fp.min");
 178   addOperator(kind::FLOATINGPOINT_MAX, "fp.max");
 179   addOperator(kind::FLOATINGPOINT_LEQ, "fp.leq");
 180   addOperator(kind::FLOATINGPOINT_LT, "fp.lt");
 181   addOperator(kind::FLOATINGPOINT_GEQ, "fp.geq");
 182   addOperator(kind::FLOATINGPOINT_GT, "fp.gt");
 183   addOperator(kind::FLOATINGPOINT_ISN, "fp.isNormal");
 184   addOperator(kind::FLOATINGPOINT_ISSN, "fp.isSubnormal");
 185   addOperator(kind::FLOATINGPOINT_ISZ, "fp.isZero");
 186   addOperator(kind::FLOATINGPOINT_ISINF, "fp.isInfinite");
 187   addOperator(kind::FLOATINGPOINT_ISNAN, "fp.isNaN");
 188   addOperator(kind::FLOATINGPOINT_ISNEG, "fp.isNegative");
 189   addOperator(kind::FLOATINGPOINT_ISPOS, "fp.isPositive");
 190   addOperator(kind::FLOATINGPOINT_TO_REAL, "fp.to_real");
 191
 192   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_GENERIC);
 193   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_IEEE_BITVECTOR);
 194   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_FLOATINGPOINT);
 195   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_REAL);
 196   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_SIGNED_BITVECTOR);
 197   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_UNSIGNED_BITVECTOR);
 198   Parser::addOperator(kind::FLOATINGPOINT_TO_UBV);
 199   Parser::addOperator(kind::FLOATINGPOINT_TO_SBV);
 200 }
 201
 202 void Smt2::addSepOperators() {
 203   addOperator(kind::SEP_STAR, "sep");
 204   addOperator(kind::SEP_PTO, "pto");
 205   addOperator(kind::SEP_WAND, "wand");
 206   addOperator(kind::SEP_EMP, "emp");
 207   Parser::addOperator(kind::SEP_STAR);
 208   Parser::addOperator(kind::SEP_PTO);
 209   Parser::addOperator(kind::SEP_WAND);
 210   Parser::addOperator(kind::SEP_EMP);
 211 }
 212
 213 void Smt2::addTheory(Theory theory) {
 214   switch(theory) {
 215   case THEORY_ARRAYS:
 216     addOperator(kind::SELECT, "select");
 217     addOperator(kind::STORE, "store");
 218     break;
 219
 220   case THEORY_BITVECTORS:
 221     addBitvectorOperators();
 222     break;
 223
 224   case THEORY_CORE:
 225     defineType("Bool", getExprManager()->booleanType());
 226     defineVar("true", getExprManager()->mkConst(true));
 227     defineVar("false", getExprManager()->mkConst(false));
 228     Parser::addOperator(kind::AND);
 229     Parser::addOperator(kind::DISTINCT);
 230     Parser::addOperator(kind::EQUAL);
 231     Parser::addOperator(kind::IMPLIES);
 232     Parser::addOperator(kind::ITE);
 233     Parser::addOperator(kind::NOT);
 234     Parser::addOperator(kind::OR);
 235     Parser::addOperator(kind::XOR);
 236     break;
 237
 238   case THEORY_REALS_INTS:
 239     defineType("Real", getExprManager()->realType());
 240     Parser::addOperator(kind::DIVISION);
 241     addOperator(kind::TO_INTEGER, "to_int");
 242     addOperator(kind::IS_INTEGER, "is_int");
 243     addOperator(kind::TO_REAL, "to_real");
 244     // falling through on purpose, to add Ints part of Reals_Ints
 245   case THEORY_INTS:
 246     defineType("Int", getExprManager()->integerType());
 247     addArithmeticOperators();
 248     addOperator(kind::INTS_DIVISION, "div");
 249     addOperator(kind::INTS_MODULUS, "mod");
 250     addOperator(kind::ABS, "abs");
 251     Parser::addOperator(kind::DIVISIBLE);
 252     break;
 253
 254   case THEORY_REALS:
 255     defineType("Real", getExprManager()->realType());
 256     addArithmeticOperators();
 257     Parser::addOperator(kind::DIVISION);
 258     break;
 259
 260   case THEORY_TRANSCENDENTALS: addTranscendentalOperators(); break;
 261
 262   case THEORY_QUANTIFIERS:
 263     break;
 264
 265   case THEORY_SETS:
 266     addOperator(kind::UNION, "union");
 267     addOperator(kind::INTERSECTION, "intersection");
 268     addOperator(kind::SETMINUS, "setminus");
 269     addOperator(kind::SUBSET, "subset");
 270     addOperator(kind::MEMBER, "member");
 271     addOperator(kind::SINGLETON, "singleton");
 272     addOperator(kind::INSERT, "insert");
 273     addOperator(kind::CARD, "card");
 274     addOperator(kind::COMPLEMENT, "complement");
 275     addOperator(kind::JOIN, "join");
 276     addOperator(kind::PRODUCT, "product");
 277     addOperator(kind::TRANSPOSE, "transpose");
 278     addOperator(kind::TCLOSURE, "tclosure");
 279     break;
 280
 281   case THEORY_DATATYPES:
 282   {
 283     const std::vector<Type> types;
 284     defineType("Tuple", getExprManager()->mkTupleType(types));
 285     Parser::addOperator(kind::APPLY_CONSTRUCTOR);
 286     Parser::addOperator(kind::APPLY_TESTER);
 287     Parser::addOperator(kind::APPLY_SELECTOR);
 288     Parser::addOperator(kind::APPLY_SELECTOR_TOTAL);
 289     break;
 290   }
 291
 292   case THEORY_STRINGS:
 293     defineType("String", getExprManager()->stringType());
 294     defineType("RegLan", getExprManager()->regExpType());
 295     defineType("Int", getExprManager()->integerType());
 296     addStringOperators();
 297     break;
 298
 299   case THEORY_UF:
 300     Parser::addOperator(kind::APPLY_UF);
 301     break;
 302
 303   case THEORY_FP:
 304     defineType("RoundingMode", getExprManager()->roundingModeType());
 305     defineType("Float16", getExprManager()->mkFloatingPointType(5, 11));
 306     defineType("Float32", getExprManager()->mkFloatingPointType(8, 24));
 307     defineType("Float64", getExprManager()->mkFloatingPointType(11, 53));
 308     defineType("Float128", getExprManager()->mkFloatingPointType(15, 113));
 309     addFloatingPointOperators();
 310     break;
 311
 312   case THEORY_SEP:
 313     addSepOperators();
 314     break;
 315
 316   default:
 317     std::stringstream ss;
 318     ss << "internal error: unsupported theory " << theory;
 319     throw ParserException(ss.str());
 320   }
 321 }
 322
 323 void Smt2::addOperator(Kind kind, const std::string& name) {
 324   Debug("parser") << "Smt2::addOperator( " << kind << ", " << name << " )"
 325                   << std::endl;
 326   Parser::addOperator(kind);
 327   operatorKindMap[name] = kind;
 328 }
 329
 330 Kind Smt2::getOperatorKind(const std::string& name) const {
 331   // precondition: isOperatorEnabled(name)
 332   return operatorKindMap.find(name)->second;
 333 }
 334
 335 bool Smt2::isOperatorEnabled(const std::string& name) const {
 336   return operatorKindMap.find(name) != operatorKindMap.end();
 337 }
 338
 339 bool Smt2::isTheoryEnabled(Theory theory) const {
 340   switch(theory) {
 341   case THEORY_ARRAYS:
 342     return d_logic.isTheoryEnabled(theory::THEORY_ARRAYS);
 343   case THEORY_BITVECTORS:
 344     return d_logic.isTheoryEnabled(theory::THEORY_BV);
 345   case THEORY_CORE:
 346     return true;
 347   case THEORY_DATATYPES:
 348     return d_logic.isTheoryEnabled(theory::THEORY_DATATYPES);
 349   case THEORY_INTS:
 350     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 351       d_logic.areIntegersUsed() && ( !d_logic.areRealsUsed() );
 352   case THEORY_REALS:
 353     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 354       ( !d_logic.areIntegersUsed() ) && d_logic.areRealsUsed();
 355   case THEORY_REALS_INTS:
 356     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 357       d_logic.areIntegersUsed() && d_logic.areRealsUsed();
 358   case THEORY_QUANTIFIERS:
 359     return d_logic.isQuantified();
 360   case THEORY_SETS:
 361     return d_logic.isTheoryEnabled(theory::THEORY_SETS);
 362   case THEORY_STRINGS:
 363     return d_logic.isTheoryEnabled(theory::THEORY_STRINGS);
 364   case THEORY_UF:
 365     return d_logic.isTheoryEnabled(theory::THEORY_UF);
 366   case THEORY_FP:
 367     return d_logic.isTheoryEnabled(theory::THEORY_FP);
 368   case THEORY_SEP:
 369     return d_logic.isTheoryEnabled(theory::THEORY_SEP);
 370   default:
 371     std::stringstream ss;
 372     ss << "internal error: unsupported theory " << theory;
 373     throw ParserException(ss.str());
 374   }
 375 }
 376
 377 bool Smt2::logicIsSet() {
 378   return d_logicSet;
 379 }
 380
 381 Expr Smt2::getExpressionForNameAndType(const std::string& name, Type t) {
 382   if(sygus() && name[0]=='-' &&
 383     name.find_first_not_of("0123456789", 1) == std::string::npos) {
 384     //allow unary minus in sygus
 385     return getExprManager()->mkConst(Rational(name));
 386   }else if(isAbstractValue(name)) {
 387     return mkAbstractValue(name);
 388   }else{
 389     return Parser::getExpressionForNameAndType(name, t);
 390   }
 391 }
 392
 393 Expr Smt2::mkDefineFunRec(
 394     const std::string& fname,
 395     const std::vector<std::pair<std::string, Type> >& sortedVarNames,
 396     Type t,
 397     std::vector<Expr>& flattenVars)
 398 {
 399   std::vector<Type> sorts;
 400   for (const std::pair<std::string, CVC4::Type>& svn : sortedVarNames)
 401   {
 402     sorts.push_back(svn.second);
 403   }
 404
 405   // make the flattened function type, add bound variables
 406   // to flattenVars if the defined function was given a function return type.
 407   Type ft = mkFlatFunctionType(sorts, t, flattenVars);
 408
 409   // allow overloading
 410   return mkVar(fname, ft, ExprManager::VAR_FLAG_NONE, true);
 411 }
 412
 413 void Smt2::pushDefineFunRecScope(
 414     const std::vector<std::pair<std::string, Type> >& sortedVarNames,
 415     Expr func,
 416     const std::vector<Expr>& flattenVars,
 417     std::vector<Expr>& bvs,
 418     bool bindingLevel)
 419 {
 420   pushScope(bindingLevel);
 421
 422   // bound variables are those that are explicitly named in the preamble
 423   // of the define-fun(s)-rec command, we define them here
 424   for (const std::pair<std::string, CVC4::Type>& svn : sortedVarNames)
 425   {
 426     Expr v = mkBoundVar(svn.first, svn.second);
 427     bvs.push_back(v);
 428   }
 429
 430   bvs.insert(bvs.end(), flattenVars.begin(), flattenVars.end());
 431 }
 432
 433 void Smt2::reset() {
 434   d_logicSet = false;
 435   d_logic = LogicInfo();
 436   operatorKindMap.clear();
 437   d_lastNamedTerm = std::pair<Expr, std::string>();
 438   this->Parser::reset();
 439
 440   if( !strictModeEnabled() ) {
 441     addTheory(Smt2::THEORY_CORE);
 442   }
 443 }
 444
 445 void Smt2::resetAssertions() {
 446   // Remove all declarations except the ones at level 0.
 447   while (this->scopeLevel() > 0) {
 448     this->popScope();
 449   }
 450 }
 451
 452 void Smt2::setLogic(std::string name) {
 453
 454   if(sygus()) {
 455     // non-smt2-standard sygus logic names go here (http://sygus.seas.upenn.edu/files/sygus.pdf Section 3.2)
 456     if(name == "Arrays") {
 457       name = "A";
 458     }else if(name == "Reals") {
 459       name = "LRA";
 460     }
 461   }
 462
 463   d_logicSet = true;
 464   if(logicIsForced()) {
 465     d_logic = getForcedLogic();
 466   } else {
 467     d_logic = name;
 468   }
 469
 470   // if sygus is enabled, we must enable UF, datatypes, integer arithmetic and
 471   // higher-order
 472   if(sygus()) {
 473     if (!d_logic.isQuantified())
 474     {
 475       warning("Logics in sygus are assumed to contain quantifiers.");
 476       warning("Omit QF_ from the logic to avoid this warning.");
 477     }
 478     // get unlocked copy, modify, copy and relock
 479     LogicInfo log(d_logic.getUnlockedCopy());
 480     log.enableQuantifiers();
 481     log.enableTheory(theory::THEORY_UF);
 482     log.enableTheory(theory::THEORY_DATATYPES);
 483     log.enableIntegers();
 484     log.enableHigherOrder();
 485     d_logic = log;
 486     d_logic.lock();
 487   }
 488
 489   // Core theory belongs to every logic
 490   addTheory(THEORY_CORE);
 491
 492   if(d_logic.isTheoryEnabled(theory::THEORY_UF)) {
 493     addTheory(THEORY_UF);
 494   }
 495
 496   if(d_logic.isTheoryEnabled(theory::THEORY_ARITH)) {
 497     if(d_logic.areIntegersUsed()) {
 498       if(d_logic.areRealsUsed()) {
 499         addTheory(THEORY_REALS_INTS);
 500       } else {
 501         addTheory(THEORY_INTS);
 502       }
 503     } else if(d_logic.areRealsUsed()) {
 504       addTheory(THEORY_REALS);
 505     }
 506
 507     if (d_logic.areTranscendentalsUsed())
 508     {
 509       addTheory(THEORY_TRANSCENDENTALS);
 510     }
 511   }
 512
 513   if(d_logic.isTheoryEnabled(theory::THEORY_ARRAYS)) {
 514     addTheory(THEORY_ARRAYS);
 515   }
 516
 517   if(d_logic.isTheoryEnabled(theory::THEORY_BV)) {
 518     addTheory(THEORY_BITVECTORS);
 519   }
 520
 521   if(d_logic.isTheoryEnabled(theory::THEORY_DATATYPES)) {
 522     addTheory(THEORY_DATATYPES);
 523   }
 524
 525   if(d_logic.isTheoryEnabled(theory::THEORY_SETS)) {
 526     addTheory(THEORY_SETS);
 527   }
 528
 529   if(d_logic.isTheoryEnabled(theory::THEORY_STRINGS)) {
 530     addTheory(THEORY_STRINGS);
 531   }
 532
 533   if(d_logic.isQuantified()) {
 534     addTheory(THEORY_QUANTIFIERS);
 535   }
 536
 537   if (d_logic.isTheoryEnabled(theory::THEORY_FP)) {
 538     addTheory(THEORY_FP);
 539   }
 540
 541   if (d_logic.isTheoryEnabled(theory::THEORY_SEP)) {
 542     addTheory(THEORY_SEP);
 543   }
 544
 545 }/* Smt2::setLogic() */
 546
 547 void Smt2::setInfo(const std::string& flag, const SExpr& sexpr) {
 548   // TODO: ???
 549 }
 550
 551 void Smt2::setOption(const std::string& flag, const SExpr& sexpr) {
 552   // TODO: ???
 553 }
 554
 555 void Smt2::checkThatLogicIsSet() {
 556   if( ! logicIsSet() ) {
 557     if(strictModeEnabled()) {
 558       parseError("set-logic must appear before this point.");
 559     } else {
 560       warning("No set-logic command was given before this point.");
 561       warning("CVC4 will make all theories available.");
 562       warning("Consider setting a stricter logic for (likely) better performance.");
 563       warning("To suppress this warning in the future use (set-logic ALL).");
 564
 565       setLogic("ALL");
 566
 567       Command* c = new SetBenchmarkLogicCommand("ALL");
 568       c->setMuted(true);
 569       preemptCommand(c);
 570     }
 571   }
 572 }
 573
 574 /* The include are managed in the lexer but called in the parser */
 575 // Inspired by http://www.antlr3.org/api/C/interop.html
 576
 577 static bool newInputStream(const std::string& filename, pANTLR3_LEXER lexer) {
 578   Debug("parser") << "Including " << filename << std::endl;
 579   // Create a new input stream and take advantage of built in stream stacking
 580   // in C target runtime.
 581   //
 582   pANTLR3_INPUT_STREAM    in;
 583 #ifdef CVC4_ANTLR3_OLD_INPUT_STREAM
 584   in = antlr3AsciiFileStreamNew((pANTLR3_UINT8) filename.c_str());
 585 #else /* CVC4_ANTLR3_OLD_INPUT_STREAM */
 586   in = antlr3FileStreamNew((pANTLR3_UINT8) filename.c_str(), ANTLR3_ENC_8BIT);
 587 #endif /* CVC4_ANTLR3_OLD_INPUT_STREAM */
 588   if( in == NULL ) {
 589     Debug("parser") << "Can't open " << filename << std::endl;
 590     return false;
 591   }
 592   // Same thing as the predefined PUSHSTREAM(in);
 593   lexer->pushCharStream(lexer, in);
 594   // restart it
 595   //lexer->rec->state->tokenStartCharIndex      = -10;
 596   //lexer->emit(lexer);
 597
 598   // Note that the input stream is not closed when it EOFs, I don't bother
 599   // to do it here, but it is up to you to track streams created like this
 600   // and destroy them when the whole parse session is complete. Remember that you
 601   // don't want to do this until all tokens have been manipulated all the way through
 602   // your tree parsers etc as the token does not store the text it just refers
 603   // back to the input stream and trying to get the text for it will abort if you
 604   // close the input stream too early.
 605
 606   //TODO what said before
 607   return true;
 608 }
 609
 610 void Smt2::includeFile(const std::string& filename) {
 611   // security for online version
 612   if(!canIncludeFile()) {
 613     parseError("include-file feature was disabled for this run.");
 614   }
 615
 616   // Get the lexer
 617   AntlrInput* ai = static_cast<AntlrInput*>(getInput());
 618   pANTLR3_LEXER lexer = ai->getAntlr3Lexer();
 619   // get the name of the current stream "Does it work inside an include?"
 620   const std::string inputName = ai->getInputStreamName();
 621
 622   // Find the directory of the current input file
 623   std::string path;
 624   size_t pos = inputName.rfind('/');
 625   if(pos != std::string::npos) {
 626     path = std::string(inputName, 0, pos + 1);
 627   }
 628   path.append(filename);
 629   if(!newInputStream(path, lexer)) {
 630     parseError("Couldn't open include file `" + path + "'");
 631   }
 632 }
 633
 634 void Smt2::mkSygusConstantsForType( const Type& type, std::vector<CVC4::Expr>& ops ) {
 635   if( type.isInteger() ){
 636     ops.push_back(getExprManager()->mkConst(Rational(0)));
 637     ops.push_back(getExprManager()->mkConst(Rational(1)));
 638   }else if( type.isBitVector() ){
 639     unsigned sz = ((BitVectorType)type).getSize();
 640     BitVector bval0(sz, (unsigned int)0);
 641     ops.push_back( getExprManager()->mkConst(bval0) );
 642     BitVector bval1(sz, (unsigned int)1);
 643     ops.push_back( getExprManager()->mkConst(bval1) );
 644   }else if( type.isBoolean() ){
 645     ops.push_back(getExprManager()->mkConst(true));
 646     ops.push_back(getExprManager()->mkConst(false));
 647   }
 648   //TODO : others?
 649 }
 650
 651 //  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)
 652 //  This method may also add new elements pairwise into datatypes/sorts/ops/cnames/cargs in the case of non-flat gterms.
 653 void Smt2::processSygusGTerm( CVC4::SygusGTerm& sgt, int index,
 654                               std::vector< CVC4::Datatype >& datatypes,
 655                               std::vector< CVC4::Type>& sorts,
 656                               std::vector< std::vector<CVC4::Expr> >& ops,
 657                               std::vector< std::vector<std::string> >& cnames,
 658                               std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 659                               std::vector< bool >& allow_const,
 660                               std::vector< std::vector< std::string > >& unresolved_gterm_sym,
 661                               std::vector<CVC4::Expr>& sygus_vars,
 662                               std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin, std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr,
 663                               CVC4::Type& ret, bool isNested ){
 664   if( sgt.d_gterm_type==SygusGTerm::gterm_op || sgt.d_gterm_type==SygusGTerm::gterm_let ){
 665     Debug("parser-sygus") << "Add " << sgt.d_expr << " to datatype " << index
 666                           << ", isLet = "
 667                           << (sgt.d_gterm_type == SygusGTerm::gterm_let)
 668                           << std::endl;
 669     Kind oldKind;
 670     Kind newKind = kind::UNDEFINED_KIND;
 671     //convert to UMINUS if one child of MINUS
 672     if( sgt.d_children.size()==1 && sgt.d_expr==getExprManager()->operatorOf(kind::MINUS) ){
 673       oldKind = kind::MINUS;
 674       newKind = kind::UMINUS;
 675     }
 676     if( newKind!=kind::UNDEFINED_KIND ){
 677       Expr newExpr = getExprManager()->operatorOf(newKind);
 678       Debug("parser-sygus") << "Replace " << sgt.d_expr << " with " << newExpr << std::endl;
 679       sgt.d_expr = newExpr;
 680       std::string oldName = kind::kindToString(oldKind);
 681       std::string newName = kind::kindToString(newKind);
 682       size_t pos = 0;
 683       if((pos = sgt.d_name.find(oldName, pos)) != std::string::npos){
 684         sgt.d_name.replace(pos, oldName.length(), newName);
 685       }
 686     }
 687     ops[index].push_back( sgt.d_expr );
 688     cnames[index].push_back( sgt.d_name );
 689     cargs[index].push_back( std::vector< CVC4::Type >() );
 690     for( unsigned i=0; i<sgt.d_children.size(); i++ ){
 691       std::stringstream ss;
 692       ss << datatypes[index].getName() << "_" << ops[index].size() << "_arg_" << i;
 693       std::string sub_dname = ss.str();
 694       //add datatype for child
 695       Type null_type;
 696       pushSygusDatatypeDef( null_type, sub_dname, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym );
 697       int sub_dt_index = datatypes.size()-1;
 698       //process child
 699       Type sub_ret;
 700       processSygusGTerm( sgt.d_children[i], sub_dt_index, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym,
 701                          sygus_vars, sygus_to_builtin, sygus_to_builtin_expr, sub_ret, true );
 702       //process the nested gterm (either pop the last datatype, or flatten the argument)
 703       Type tt = processSygusNestedGTerm( sub_dt_index, sub_dname, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym,
 704                                          sygus_to_builtin, sygus_to_builtin_expr, sub_ret );
 705       cargs[index].back().push_back(tt);
 706     }
 707     //if let, must create operator
 708     if( sgt.d_gterm_type==SygusGTerm::gterm_let ){
 709       processSygusLetConstructor( sgt.d_let_vars, index, datatypes, sorts, ops, cnames, cargs,
 710                                   sygus_vars, sygus_to_builtin, sygus_to_builtin_expr );
 711     }
 712   }else if( sgt.d_gterm_type==SygusGTerm::gterm_constant ){
 713     if( sgt.getNumChildren()!=0 ){
 714       parseError("Bad syntax for Sygus Constant.");
 715     }
 716     std::vector< Expr > consts;
 717     mkSygusConstantsForType( sgt.d_type, consts );
 718     Debug("parser-sygus") << "...made " << consts.size() << " constants." << std::endl;
 719     for( unsigned i=0; i<consts.size(); i++ ){
 720       std::stringstream ss;
 721       ss << consts[i];
 722       Debug("parser-sygus") << "...add for constant " << ss.str() << std::endl;
 723       ops[index].push_back( consts[i] );
 724       cnames[index].push_back( ss.str() );
 725       cargs[index].push_back( std::vector< CVC4::Type >() );
 726     }
 727     allow_const[index] = true;
 728   }else if( sgt.d_gterm_type==SygusGTerm::gterm_variable || sgt.d_gterm_type==SygusGTerm::gterm_input_variable ){
 729     if( sgt.getNumChildren()!=0 ){
 730       parseError("Bad syntax for Sygus Variable.");
 731     }
 732     Debug("parser-sygus") << "...process " << sygus_vars.size() << " variables." << std::endl;
 733     for( unsigned i=0; i<sygus_vars.size(); i++ ){
 734       if( sygus_vars[i].getType()==sgt.d_type ){
 735         std::stringstream ss;
 736         ss << sygus_vars[i];
 737         Debug("parser-sygus") << "...add for variable " << ss.str() << std::endl;
 738         ops[index].push_back( sygus_vars[i] );
 739         cnames[index].push_back( ss.str() );
 740         cargs[index].push_back( std::vector< CVC4::Type >() );
 741       }
 742     }
 743   }else if( sgt.d_gterm_type==SygusGTerm::gterm_nested_sort ){
 744     ret = sgt.d_type;
 745   }else if( sgt.d_gterm_type==SygusGTerm::gterm_unresolved ){
 746     if( isNested ){
 747       if( isUnresolvedType(sgt.d_name) ){
 748         ret = getSort(sgt.d_name);
 749       }else{
 750         //nested, unresolved symbol...fail
 751         std::stringstream ss;
 752         ss << "Cannot handle nested unresolved symbol " << sgt.d_name << std::endl;
 753         parseError(ss.str());
 754       }
 755     }else{
 756       //will resolve when adding constructors
 757       unresolved_gterm_sym[index].push_back(sgt.d_name);
 758     }
 759   }else if( sgt.d_gterm_type==SygusGTerm::gterm_ignore ){
 760
 761   }
 762 }
 763
 764 bool Smt2::pushSygusDatatypeDef( Type t, std::string& dname,
 765                                   std::vector< CVC4::Datatype >& datatypes,
 766                                   std::vector< CVC4::Type>& sorts,
 767                                   std::vector< std::vector<CVC4::Expr> >& ops,
 768                                   std::vector< std::vector<std::string> >& cnames,
 769                                   std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 770                                   std::vector< bool >& allow_const,
 771                                   std::vector< std::vector< std::string > >& unresolved_gterm_sym ){
 772   sorts.push_back(t);
 773   datatypes.push_back(Datatype(dname));
 774   ops.push_back(std::vector<Expr>());
 775   cnames.push_back(std::vector<std::string>());
 776   cargs.push_back(std::vector<std::vector<CVC4::Type> >());
 777   allow_const.push_back(false);
 778   unresolved_gterm_sym.push_back(std::vector< std::string >());
 779   return true;
 780 }
 781
 782 bool Smt2::popSygusDatatypeDef( std::vector< CVC4::Datatype >& datatypes,
 783                                  std::vector< CVC4::Type>& sorts,
 784                                  std::vector< std::vector<CVC4::Expr> >& ops,
 785                                  std::vector< std::vector<std::string> >& cnames,
 786                                  std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 787                                  std::vector< bool >& allow_const,
 788                                  std::vector< std::vector< std::string > >& unresolved_gterm_sym ){
 789   sorts.pop_back();
 790   datatypes.pop_back();
 791   ops.pop_back();
 792   cnames.pop_back();
 793   cargs.pop_back();
 794   allow_const.pop_back();
 795   unresolved_gterm_sym.pop_back();
 796   return true;
 797 }
 798
 799 Type Smt2::processSygusNestedGTerm( int sub_dt_index, std::string& sub_dname, std::vector< CVC4::Datatype >& datatypes,
 800                                     std::vector< CVC4::Type>& sorts,
 801                                     std::vector< std::vector<CVC4::Expr> >& ops,
 802                                     std::vector< std::vector<std::string> >& cnames,
 803                                     std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 804                                     std::vector< bool >& allow_const,
 805                                     std::vector< std::vector< std::string > >& unresolved_gterm_sym,
 806                                     std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin,
 807                                     std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr, Type sub_ret ) {
 808   Type t = sub_ret;
 809   Debug("parser-sygus") << "Argument is ";
 810   if( t.isNull() ){
 811     //then, it is the datatype we constructed, which should have a single constructor
 812     t = mkUnresolvedType(sub_dname);
 813     Debug("parser-sygus") << "inline flattening of (auxiliary, local) datatype " << t << std::endl;
 814     Debug("parser-sygus") << ": to compute type, construct ground term witnessing the grammar, #cons=" << cargs[sub_dt_index].size() << std::endl;
 815     if( cargs[sub_dt_index].empty() ){
 816       parseError(std::string("Internal error : datatype for nested gterm does not have a constructor."));
 817     }
 818     Expr sop = ops[sub_dt_index][0];
 819     Type curr_t;
 820     if( sop.getKind() != kind::BUILTIN && ( sop.isConst() || cargs[sub_dt_index][0].empty() ) ){
 821       curr_t = sop.getType();
 822       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;
 823       // only cache if it is a singleton datatype (has unique expr)
 824       if (ops[sub_dt_index].size() == 1)
 825       {
 826         sygus_to_builtin_expr[t] = sop;
 827         // store that term sop has dedicated sygus type t
 828         if (d_sygus_bound_var_type.find(sop) == d_sygus_bound_var_type.end())
 829         {
 830           d_sygus_bound_var_type[sop] = t;
 831         }
 832       }
 833     }else{
 834       std::vector< Expr > children;
 835       if( sop.getKind() != kind::BUILTIN ){
 836         children.push_back( sop );
 837       }
 838       for( unsigned i=0; i<cargs[sub_dt_index][0].size(); i++ ){
 839         std::map< CVC4::Type, CVC4::Expr >::iterator it = sygus_to_builtin_expr.find( cargs[sub_dt_index][0][i] );
 840         if( it==sygus_to_builtin_expr.end() ){
 841           if( sygus_to_builtin.find( cargs[sub_dt_index][0][i] )==sygus_to_builtin.end() ){
 842             std::stringstream ss;
 843             ss << "Missing builtin type for type " << cargs[sub_dt_index][0][i] << "!" << std::endl;
 844             ss << "Builtin types are currently : " << std::endl;
 845             for( std::map< CVC4::Type, CVC4::Type >::iterator itb = sygus_to_builtin.begin(); itb != sygus_to_builtin.end(); ++itb ){
 846               ss << "  " << itb->first << " -> " << itb->second << std::endl;
 847             }
 848             parseError(ss.str());
 849           }
 850           Type bt = sygus_to_builtin[cargs[sub_dt_index][0][i]];
 851           Debug("parser-sygus") << ":  child " << i << " introduce type elem for " << cargs[sub_dt_index][0][i] << " " << bt << std::endl;
 852           std::stringstream ss;
 853           ss << t << "_x_" << i;
 854           Expr bv = mkBoundVar(ss.str(), bt);
 855           children.push_back( bv );
 856           d_sygus_bound_var_type[bv] = cargs[sub_dt_index][0][i];
 857         }else{
 858           Debug("parser-sygus") << ":  child " << i << " existing sygus to builtin expr : " << it->second << std::endl;
 859           children.push_back( it->second );
 860         }
 861       }
 862       Kind sk = sop.getKind() != kind::BUILTIN
 863                     ? kind::APPLY_UF
 864                     : getExprManager()->operatorToKind(sop);
 865       Debug("parser-sygus") << ": operator " << sop << " with " << sop.getKind() << " " << sk << std::endl;
 866       Expr e = getExprManager()->mkExpr( sk, children );
 867       Debug("parser-sygus") << ": constructed " << e << ", which has type " << e.getType() << std::endl;
 868       curr_t = e.getType();
 869       sygus_to_builtin_expr[t] = e;
 870     }
 871     sorts[sub_dt_index] = curr_t;
 872     sygus_to_builtin[t] = curr_t;
 873   }else{
 874     Debug("parser-sygus") << "simple argument " << t << std::endl;
 875     Debug("parser-sygus") << "...removing " << datatypes.back().getName() << std::endl;
 876     //otherwise, datatype was unecessary
 877     //pop argument datatype definition
 878     popSygusDatatypeDef( datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym );
 879   }
 880   return t;
 881 }
 882
 883 void Smt2::processSygusLetConstructor( std::vector< CVC4::Expr >& let_vars,
 884                                        int index,
 885                                        std::vector< CVC4::Datatype >& datatypes,
 886                                        std::vector< CVC4::Type>& sorts,
 887                                        std::vector< std::vector<CVC4::Expr> >& ops,
 888                                        std::vector< std::vector<std::string> >& cnames,
 889                                        std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 890                                        std::vector<CVC4::Expr>& sygus_vars,
 891                                        std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin,
 892                                        std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr ) {
 893   std::vector< CVC4::Expr > let_define_args;
 894   Expr let_body;
 895   int dindex = cargs[index].size()-1;
 896   Debug("parser-sygus") << "Process let constructor for datatype " << datatypes[index].getName() << ", #subtypes = " << cargs[index][dindex].size() << std::endl;
 897   for( unsigned i=0; i<cargs[index][dindex].size(); i++ ){
 898     Debug("parser-sygus") << "  " << i << " : " << cargs[index][dindex][i] << std::endl;
 899     if( i+1==cargs[index][dindex].size() ){
 900       std::map< CVC4::Type, CVC4::Expr >::iterator it = sygus_to_builtin_expr.find( cargs[index][dindex][i] );
 901       if( it!=sygus_to_builtin_expr.end() ){
 902         let_body = it->second;
 903       }else{
 904         std::stringstream ss;
 905         ss << datatypes[index].getName() << "_body";
 906         let_body = mkBoundVar(ss.str(), sygus_to_builtin[cargs[index][dindex][i]]);
 907         d_sygus_bound_var_type[let_body] = cargs[index][dindex][i];
 908       }
 909     }
 910   }
 911   Debug("parser-sygus") << std::endl;
 912   Debug("parser-sygus") << "Body is " << let_body << std::endl;
 913   Debug("parser-sygus") << "# let vars = " << let_vars.size() << std::endl;
 914   for( unsigned i=0; i<let_vars.size(); i++ ){
 915     Debug("parser-sygus") << "  let var " << i << " : " << let_vars[i] << " " << let_vars[i].getType() << std::endl;
 916     let_define_args.push_back( let_vars[i] );
 917   }
 918   /*
 919   Debug("parser-sygus") << "index = " << index << ", start index = " << start_index << ", #Current datatypes = " << datatypes.size() << std::endl;
 920   for( unsigned i=start_index; i<datatypes.size(); i++ ){
 921     Debug("parser-sygus") << "  datatype " << i << " : " << datatypes[i].getName() << ", #cons = " << cargs[i].size() << std::endl;
 922     if( !cargs[i].empty() ){
 923       Debug("parser-sygus") << "  operator 0 is " << ops[i][0] << std::endl;
 924       Debug("parser-sygus") << "  cons 0 has " << cargs[i][0].size() << " sub fields." << std::endl;
 925       for( unsigned j=0; j<cargs[i][0].size(); j++ ){
 926         Type bt = sygus_to_builtin[cargs[i][0][j]];
 927         Debug("parser-sygus") << "    cons 0, selector " << j << " : " << cargs[i][0][j] << " " << bt << std::endl;
 928       }
 929     }
 930   }
 931   */
 932   //last argument is the return, pop
 933   cargs[index][dindex].pop_back();
 934   collectSygusLetArgs( let_body, cargs[index][dindex], let_define_args );
 935
 936   Debug("parser-sygus") << "Make define-fun with "
 937                         << cargs[index][dindex].size()
 938                         << " operator arguments and " << let_define_args.size()
 939                         << " provided arguments..." << std::endl;
 940   if (cargs[index][dindex].size() != let_define_args.size())
 941   {
 942     std::stringstream ss;
 943     ss << "Wrong number of let body terms." << std::endl;
 944     parseError(ss.str());
 945   }
 946   std::vector<CVC4::Type> fsorts;
 947   for( unsigned i=0; i<cargs[index][dindex].size(); i++ ){
 948     Debug("parser-sygus") << "  " << i << " : " << let_define_args[i] << " " << let_define_args[i].getType() << " " << cargs[index][dindex][i] << std::endl;
 949     fsorts.push_back(let_define_args[i].getType());
 950   }
 951
 952   Type ft = getExprManager()->mkFunctionType(fsorts, let_body.getType());
 953   std::stringstream ss;
 954   ss << datatypes[index].getName() << "_let";
 955   Expr let_func = mkFunction(ss.str(), ft, ExprManager::VAR_FLAG_DEFINED);
 956   d_sygus_defined_funs.push_back( let_func );
 957   preemptCommand( new DefineFunctionCommand(ss.str(), let_func, let_define_args, let_body) );
 958
 959   ops[index].pop_back();
 960   ops[index].push_back( let_func );
 961   cnames[index].pop_back();
 962   cnames[index].push_back(ss.str());
 963
 964   //mark function as let constructor
 965   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() );
 966   d_sygus_let_func_to_body[let_func] = let_body;
 967   d_sygus_let_func_to_num_input_vars[let_func] = let_vars.size();
 968 }
 969
 970
 971 void Smt2::collectSygusLetArgs( CVC4::Expr e, std::vector< CVC4::Type >& sygusArgs, std::vector< CVC4::Expr >& builtinArgs ) {
 972   if( e.getKind()==kind::BOUND_VARIABLE ){
 973     if( std::find( builtinArgs.begin(), builtinArgs.end(), e )==builtinArgs.end() ){
 974       builtinArgs.push_back( e );
 975       sygusArgs.push_back( d_sygus_bound_var_type[e] );
 976       if( d_sygus_bound_var_type[e].isNull() ){
 977         std::stringstream ss;
 978         ss << "While constructing body of let gterm, can't map " << e << " to sygus type." << std::endl;
 979         parseError(ss.str());
 980       }
 981     }
 982   }else{
 983     for( unsigned i=0; i<e.getNumChildren(); i++ ){
 984       collectSygusLetArgs( e[i], sygusArgs, builtinArgs );
 985     }
 986   }
 987 }
 988
 989 void Smt2::setSygusStartIndex( std::string& fun, int startIndex,
 990                                std::vector< CVC4::Datatype >& datatypes,
 991                                std::vector< CVC4::Type>& sorts,
 992                                std::vector< std::vector<CVC4::Expr> >& ops ) {
 993   if( startIndex>0 ){
 994     CVC4::Datatype tmp_dt = datatypes[0];
 995     Type tmp_sort = sorts[0];
 996     std::vector< Expr > tmp_ops;
 997     tmp_ops.insert( tmp_ops.end(), ops[0].begin(), ops[0].end() );
 998     datatypes[0] = datatypes[startIndex];
 999     sorts[0] = sorts[startIndex];
1000     ops[0].clear();
1001     ops[0].insert( ops[0].end(), ops[startIndex].begin(), ops[startIndex].end() );
1002     datatypes[startIndex] = tmp_dt;
1003     sorts[startIndex] = tmp_sort;
1004     ops[startIndex].clear();
1005     ops[startIndex].insert( ops[startIndex].begin(), tmp_ops.begin(), tmp_ops.end() );
1006   }else if( startIndex<0 ){
1007     std::stringstream ss;
1008     ss << "warning: no symbol named Start for synth-fun " << fun << std::endl;
1009     warning(ss.str());
1010   }
1011 }
1012
1013 void Smt2::mkSygusDatatype( CVC4::Datatype& dt, std::vector<CVC4::Expr>& ops,
1014                             std::vector<std::string>& cnames, std::vector< std::vector< CVC4::Type > >& cargs,
1015                             std::vector<std::string>& unresolved_gterm_sym,
1016                             std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin ) {
1017   Debug("parser-sygus") << "Making sygus datatype " << dt.getName() << std::endl;
1018   Debug("parser-sygus") << "  add constructors..." << std::endl;
1019
1020   Debug("parser-sygus") << "SMT2 sygus parser : Making constructors for sygus datatype " << dt.getName() << std::endl;
1021   Debug("parser-sygus") << "  add constructors..." << std::endl;
1022   // size of cnames changes, this loop must check size
1023   for (unsigned i = 0; i < cnames.size(); i++)
1024   {
1025     bool is_dup = false;
1026     bool is_dup_op = false;
1027     for (unsigned j = 0; j < i; j++)
1028     {
1029       if( ops[i]==ops[j] ){
1030         is_dup_op = true;
1031         if( cargs[i].size()==cargs[j].size() ){
1032           is_dup = true;
1033           for( unsigned k=0; k<cargs[i].size(); k++ ){
1034             if( cargs[i][k]!=cargs[j][k] ){
1035               is_dup = false;
1036               break;
1037             }
1038           }
1039         }
1040         if( is_dup ){
1041           break;
1042         }
1043       }
1044     }
1045     Debug("parser-sygus") << "SYGUS CONS " << i << " : ";
1046     if( is_dup ){
1047       Debug("parser-sygus") << "--> Duplicate gterm : " << ops[i] << std::endl;
1048       ops.erase( ops.begin() + i, ops.begin() + i + 1 );
1049       cnames.erase( cnames.begin() + i, cnames.begin() + i + 1 );
1050       cargs.erase( cargs.begin() + i, cargs.begin() + i + 1 );
1051       i--;
1052     }
1053     else
1054     {
1055       std::shared_ptr<SygusPrintCallback> spc;
1056       if (is_dup_op)
1057       {
1058         Debug("parser-sygus") << "--> Duplicate gterm operator : " << ops[i]
1059                               << std::endl;
1060         // make into define-fun
1061         std::vector<Type> ltypes;
1062         for (unsigned j = 0, size = cargs[i].size(); j < size; j++)
1063         {
1064           ltypes.push_back(sygus_to_builtin[cargs[i][j]]);
1065         }
1066         std::vector<Expr> largs;
1067         Expr lbvl = makeSygusBoundVarList(dt, i, ltypes, largs);
1068
1069         // make the let_body
1070         std::vector<Expr> children;
1071         if (ops[i].getKind() != kind::BUILTIN)
1072         {
1073           children.push_back(ops[i]);
1074         }
1075         children.insert(children.end(), largs.begin(), largs.end());
1076         Kind sk = ops[i].getKind() != kind::BUILTIN
1077                       ? kind::APPLY_UF
1078                       : getExprManager()->operatorToKind(ops[i]);
1079         Expr body = getExprManager()->mkExpr(sk, children);
1080         // replace by lambda
1081         ops[i] = getExprManager()->mkExpr(kind::LAMBDA, lbvl, body);
1082         Debug("parser-sygus") << "  ...replace op : " << ops[i] << std::endl;
1083         // callback prints as the expression
1084         spc = std::make_shared<printer::SygusExprPrintCallback>(body, largs);
1085       }
1086       else
1087       {
1088         std::map<Expr, Expr>::iterator it =
1089             d_sygus_let_func_to_body.find(ops[i]);
1090         if (it != d_sygus_let_func_to_body.end())
1091         {
1092           Debug("parser-sygus") << "--> Let expression " << ops[i] << std::endl;
1093           Expr let_body = it->second;
1094           std::vector<Expr> let_args = d_sygus_let_func_to_vars[ops[i]];
1095           unsigned let_num_input_args =
1096               d_sygus_let_func_to_num_input_vars[ops[i]];
1097           // the operator is just the body for the arguments
1098           std::vector<Type> ltypes;
1099           for (unsigned j = 0, size = let_args.size(); j < size; j++)
1100           {
1101             ltypes.push_back(let_args[j].getType());
1102           }
1103           std::vector<Expr> largs;
1104           Expr lbvl = makeSygusBoundVarList(dt, i, ltypes, largs);
1105           Expr sbody = let_body.substitute(let_args, largs);
1106           ops[i] = getExprManager()->mkExpr(kind::LAMBDA, lbvl, sbody);
1107           Debug("parser-sygus") << "  ...replace op : " << ops[i] << std::endl;
1108           // callback prints as a let expression
1109           spc = std::make_shared<printer::SygusLetExprPrintCallback>(
1110               let_body, let_args, let_num_input_args);
1111         }
1112         else if (ops[i].getType().isBitVector() && ops[i].isConst())
1113         {
1114           Debug("parser-sygus") << "--> Bit-vector constant " << ops[i] << " ("
1115                                 << cnames[i] << ")" << std::endl;
1116           // Since there are multiple output formats for bit-vectors and
1117           // we are required by sygus standards to print in the exact input
1118           // format given by the user, we use a print callback to custom print
1119           // the given name.
1120           spc = std::make_shared<printer::SygusNamedPrintCallback>(cnames[i]);
1121         }
1122         else if (isDefinedFunction(ops[i]))
1123         {
1124           Debug("parser-sygus") << "--> Defined function " << ops[i]
1125                                 << std::endl;
1126           // turn f into (lammbda (x) (f x))
1127           // in a degenerate case, ops[i] may be a defined constant,
1128           // in which case we do not replace by a lambda.
1129           if (ops[i].getType().isFunction())
1130           {
1131             std::vector<Type> ftypes =
1132                 static_cast<FunctionType>(ops[i].getType()).getArgTypes();
1133             std::vector<Expr> largs;
1134             Expr lbvl = makeSygusBoundVarList(dt, i, ftypes, largs);
1135             largs.insert(largs.begin(), ops[i]);
1136             Expr body = getExprManager()->mkExpr(kind::APPLY_UF, largs);
1137             ops[i] = getExprManager()->mkExpr(kind::LAMBDA, lbvl, body);
1138             Debug("parser-sygus") << "  ...replace op : " << ops[i]
1139                                   << std::endl;
1140           }
1141           else
1142           {
1143             Debug("parser-sygus") << "  ...replace op : " << ops[i]
1144                                   << std::endl;
1145           }
1146           // keep a callback to say it should be printed with the defined name
1147           spc = std::make_shared<printer::SygusNamedPrintCallback>(cnames[i]);
1148         }
1149         else
1150         {
1151           Debug("parser-sygus") << "--> Default case " << ops[i] << std::endl;
1152         }
1153       }
1154       // must rename to avoid duplication
1155       std::stringstream ss;
1156       ss << dt.getName() << "_" << i << "_" << cnames[i];
1157       cnames[i] = ss.str();
1158       Debug("parser-sygus") << "  construct the datatype " << cnames[i] << "..."
1159                             << std::endl;
1160       // add the sygus constructor
1161       dt.addSygusConstructor(ops[i], cnames[i], cargs[i], spc);
1162       Debug("parser-sygus") << "  finished constructing the datatype"
1163                             << std::endl;
1164     }
1165   }
1166
1167   Debug("parser-sygus") << "  add constructors for unresolved symbols..." << std::endl;
1168   if( !unresolved_gterm_sym.empty() ){
1169     std::vector< Type > types;
1170     Debug("parser-sygus") << "...resolve " << unresolved_gterm_sym.size() << " symbols..." << std::endl;
1171     for( unsigned i=0; i<unresolved_gterm_sym.size(); i++ ){
1172       Debug("parser-sygus") << "  resolve : " << unresolved_gterm_sym[i] << std::endl;
1173       if( isUnresolvedType(unresolved_gterm_sym[i]) ){
1174         Debug("parser-sygus") << "    it is an unresolved type." << std::endl;
1175         Type t = getSort(unresolved_gterm_sym[i]);
1176         if( std::find( types.begin(), types.end(), t )==types.end() ){
1177           types.push_back( t );
1178           //identity element
1179           Type bt = dt.getSygusType();
1180           Debug("parser-sygus") << ":  make identity function for " << bt << ", argument type " << t << std::endl;
1181
1182           std::stringstream ss;
1183           ss << t << "_x";
1184           Expr var = mkBoundVar(ss.str(), bt);
1185           std::vector<Expr> lchildren;
1186           lchildren.push_back(
1187               getExprManager()->mkExpr(kind::BOUND_VAR_LIST, var));
1188           lchildren.push_back(var);
1189           Expr id_op = getExprManager()->mkExpr(kind::LAMBDA, lchildren);
1190
1191           // empty sygus callback (should not be printed)
1192           std::shared_ptr<SygusPrintCallback> sepc =
1193               std::make_shared<printer::SygusEmptyPrintCallback>();
1194
1195           //make the sygus argument list
1196           std::vector< Type > id_carg;
1197           id_carg.push_back( t );
1198           dt.addSygusConstructor(id_op, unresolved_gterm_sym[i], id_carg, sepc);
1199
1200           //add to operators
1201           ops.push_back( id_op );
1202         }
1203       }else{
1204         Debug("parser-sygus") << "    ignore. (likely a free let variable)" << std::endl;
1205       }
1206     }
1207   }
1208 }
1209
1210 Expr Smt2::makeSygusBoundVarList(Datatype& dt,
1211                                  unsigned i,
1212                                  const std::vector<Type>& ltypes,
1213                                  std::vector<Expr>& lvars)
1214 {
1215   for (unsigned j = 0, size = ltypes.size(); j < size; j++)
1216   {
1217     std::stringstream ss;
1218     ss << dt.getName() << "_x_" << i << "_" << j;
1219     Expr v = mkBoundVar(ss.str(), ltypes[j]);
1220     lvars.push_back(v);
1221   }
1222   return getExprManager()->mkExpr(kind::BOUND_VAR_LIST, lvars);
1223 }
1224
1225 InputLanguage Smt2::getLanguage() const
1226 {
1227   ExprManager* em = getExprManager();
1228   return em->getOptions().getInputLanguage();
1229 }
1230
1231 }/* CVC4::parser namespace */
1232 }/* CVC4 namespace */