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   defineVar("re.all",
 126             getSolver()
 127                 ->mkTerm(api::REGEXP_STAR, getSolver()->mkRegexpSigma())
 128                 .getExpr());
 129
 130   addOperator(kind::STRING_CONCAT, "str.++");
 131   addOperator(kind::STRING_LENGTH, "str.len");
 132   addOperator(kind::STRING_SUBSTR, "str.substr" );
 133   addOperator(kind::STRING_STRCTN, "str.contains" );
 134   addOperator(kind::STRING_CHARAT, "str.at" );
 135   addOperator(kind::STRING_STRIDOF, "str.indexof" );
 136   addOperator(kind::STRING_STRREPL, "str.replace" );
 137   addOperator(kind::STRING_STRREPLALL, "str.replaceall");
 138   addOperator(kind::STRING_PREFIX, "str.prefixof" );
 139   addOperator(kind::STRING_SUFFIX, "str.suffixof" );
 140   // at the moment, we only use this syntax for smt2.6.1
 141   if (getLanguage() == language::input::LANG_SMTLIB_V2_6_1)
 142   {
 143     addOperator(kind::STRING_ITOS, "str.from-int");
 144     addOperator(kind::STRING_STOI, "str.to-int");
 145     addOperator(kind::STRING_IN_REGEXP, "str.in-re");
 146     addOperator(kind::STRING_TO_REGEXP, "str.to-re");
 147   }
 148   else
 149   {
 150     addOperator(kind::STRING_ITOS, "int.to.str");
 151     addOperator(kind::STRING_STOI, "str.to.int");
 152     addOperator(kind::STRING_IN_REGEXP, "str.in.re");
 153     addOperator(kind::STRING_TO_REGEXP, "str.to.re");
 154   }
 155
 156   addOperator(kind::REGEXP_CONCAT, "re.++");
 157   addOperator(kind::REGEXP_UNION, "re.union");
 158   addOperator(kind::REGEXP_INTER, "re.inter");
 159   addOperator(kind::REGEXP_STAR, "re.*");
 160   addOperator(kind::REGEXP_PLUS, "re.+");
 161   addOperator(kind::REGEXP_OPT, "re.opt");
 162   addOperator(kind::REGEXP_RANGE, "re.range");
 163   addOperator(kind::REGEXP_LOOP, "re.loop");
 164   addOperator(kind::STRING_CODE, "str.code");
 165   addOperator(kind::STRING_LT, "str.<");
 166   addOperator(kind::STRING_LEQ, "str.<=");
 167 }
 168
 169 void Smt2::addFloatingPointOperators() {
 170   addOperator(kind::FLOATINGPOINT_FP, "fp");
 171   addOperator(kind::FLOATINGPOINT_EQ, "fp.eq");
 172   addOperator(kind::FLOATINGPOINT_ABS, "fp.abs");
 173   addOperator(kind::FLOATINGPOINT_NEG, "fp.neg");
 174   addOperator(kind::FLOATINGPOINT_PLUS, "fp.add");
 175   addOperator(kind::FLOATINGPOINT_SUB, "fp.sub");
 176   addOperator(kind::FLOATINGPOINT_MULT, "fp.mul");
 177   addOperator(kind::FLOATINGPOINT_DIV, "fp.div");
 178   addOperator(kind::FLOATINGPOINT_FMA, "fp.fma");
 179   addOperator(kind::FLOATINGPOINT_SQRT, "fp.sqrt");
 180   addOperator(kind::FLOATINGPOINT_REM, "fp.rem");
 181   addOperator(kind::FLOATINGPOINT_RTI, "fp.roundToIntegral");
 182   addOperator(kind::FLOATINGPOINT_MIN, "fp.min");
 183   addOperator(kind::FLOATINGPOINT_MAX, "fp.max");
 184   addOperator(kind::FLOATINGPOINT_LEQ, "fp.leq");
 185   addOperator(kind::FLOATINGPOINT_LT, "fp.lt");
 186   addOperator(kind::FLOATINGPOINT_GEQ, "fp.geq");
 187   addOperator(kind::FLOATINGPOINT_GT, "fp.gt");
 188   addOperator(kind::FLOATINGPOINT_ISN, "fp.isNormal");
 189   addOperator(kind::FLOATINGPOINT_ISSN, "fp.isSubnormal");
 190   addOperator(kind::FLOATINGPOINT_ISZ, "fp.isZero");
 191   addOperator(kind::FLOATINGPOINT_ISINF, "fp.isInfinite");
 192   addOperator(kind::FLOATINGPOINT_ISNAN, "fp.isNaN");
 193   addOperator(kind::FLOATINGPOINT_ISNEG, "fp.isNegative");
 194   addOperator(kind::FLOATINGPOINT_ISPOS, "fp.isPositive");
 195   addOperator(kind::FLOATINGPOINT_TO_REAL, "fp.to_real");
 196
 197   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_GENERIC);
 198   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_IEEE_BITVECTOR);
 199   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_FLOATINGPOINT);
 200   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_REAL);
 201   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_SIGNED_BITVECTOR);
 202   Parser::addOperator(kind::FLOATINGPOINT_TO_FP_UNSIGNED_BITVECTOR);
 203   Parser::addOperator(kind::FLOATINGPOINT_TO_UBV);
 204   Parser::addOperator(kind::FLOATINGPOINT_TO_SBV);
 205 }
 206
 207 void Smt2::addSepOperators() {
 208   addOperator(kind::SEP_STAR, "sep");
 209   addOperator(kind::SEP_PTO, "pto");
 210   addOperator(kind::SEP_WAND, "wand");
 211   addOperator(kind::SEP_EMP, "emp");
 212   Parser::addOperator(kind::SEP_STAR);
 213   Parser::addOperator(kind::SEP_PTO);
 214   Parser::addOperator(kind::SEP_WAND);
 215   Parser::addOperator(kind::SEP_EMP);
 216 }
 217
 218 void Smt2::addTheory(Theory theory) {
 219   switch(theory) {
 220   case THEORY_ARRAYS:
 221     addOperator(kind::SELECT, "select");
 222     addOperator(kind::STORE, "store");
 223     break;
 224
 225   case THEORY_BITVECTORS:
 226     addBitvectorOperators();
 227     break;
 228
 229   case THEORY_CORE:
 230     defineType("Bool", getExprManager()->booleanType());
 231     defineVar("true", getExprManager()->mkConst(true));
 232     defineVar("false", getExprManager()->mkConst(false));
 233     Parser::addOperator(kind::AND);
 234     Parser::addOperator(kind::DISTINCT);
 235     Parser::addOperator(kind::EQUAL);
 236     Parser::addOperator(kind::IMPLIES);
 237     Parser::addOperator(kind::ITE);
 238     Parser::addOperator(kind::NOT);
 239     Parser::addOperator(kind::OR);
 240     Parser::addOperator(kind::XOR);
 241     break;
 242
 243   case THEORY_REALS_INTS:
 244     defineType("Real", getExprManager()->realType());
 245     Parser::addOperator(kind::DIVISION);
 246     addOperator(kind::TO_INTEGER, "to_int");
 247     addOperator(kind::IS_INTEGER, "is_int");
 248     addOperator(kind::TO_REAL, "to_real");
 249     // falling through on purpose, to add Ints part of Reals_Ints
 250   case THEORY_INTS:
 251     defineType("Int", getExprManager()->integerType());
 252     addArithmeticOperators();
 253     addOperator(kind::INTS_DIVISION, "div");
 254     addOperator(kind::INTS_MODULUS, "mod");
 255     addOperator(kind::ABS, "abs");
 256     Parser::addOperator(kind::DIVISIBLE);
 257     break;
 258
 259   case THEORY_REALS:
 260     defineType("Real", getExprManager()->realType());
 261     addArithmeticOperators();
 262     Parser::addOperator(kind::DIVISION);
 263     break;
 264
 265   case THEORY_TRANSCENDENTALS: addTranscendentalOperators(); break;
 266
 267   case THEORY_QUANTIFIERS:
 268     break;
 269
 270   case THEORY_SETS:
 271     addOperator(kind::UNION, "union");
 272     addOperator(kind::INTERSECTION, "intersection");
 273     addOperator(kind::SETMINUS, "setminus");
 274     addOperator(kind::SUBSET, "subset");
 275     addOperator(kind::MEMBER, "member");
 276     addOperator(kind::SINGLETON, "singleton");
 277     addOperator(kind::INSERT, "insert");
 278     addOperator(kind::CARD, "card");
 279     addOperator(kind::COMPLEMENT, "complement");
 280     addOperator(kind::JOIN, "join");
 281     addOperator(kind::PRODUCT, "product");
 282     addOperator(kind::TRANSPOSE, "transpose");
 283     addOperator(kind::TCLOSURE, "tclosure");
 284     break;
 285
 286   case THEORY_DATATYPES:
 287   {
 288     const std::vector<Type> types;
 289     defineType("Tuple", getExprManager()->mkTupleType(types));
 290     Parser::addOperator(kind::APPLY_CONSTRUCTOR);
 291     Parser::addOperator(kind::APPLY_TESTER);
 292     Parser::addOperator(kind::APPLY_SELECTOR);
 293     Parser::addOperator(kind::APPLY_SELECTOR_TOTAL);
 294     break;
 295   }
 296
 297   case THEORY_STRINGS:
 298     defineType("String", getExprManager()->stringType());
 299     defineType("RegLan", getExprManager()->regExpType());
 300     defineType("Int", getExprManager()->integerType());
 301     addStringOperators();
 302     break;
 303
 304   case THEORY_UF:
 305     Parser::addOperator(kind::APPLY_UF);
 306     break;
 307
 308   case THEORY_FP:
 309     defineType("RoundingMode", getExprManager()->roundingModeType());
 310     defineType("Float16", getExprManager()->mkFloatingPointType(5, 11));
 311     defineType("Float32", getExprManager()->mkFloatingPointType(8, 24));
 312     defineType("Float64", getExprManager()->mkFloatingPointType(11, 53));
 313     defineType("Float128", getExprManager()->mkFloatingPointType(15, 113));
 314     addFloatingPointOperators();
 315     break;
 316
 317   case THEORY_SEP:
 318     addSepOperators();
 319     break;
 320
 321   default:
 322     std::stringstream ss;
 323     ss << "internal error: unsupported theory " << theory;
 324     throw ParserException(ss.str());
 325   }
 326 }
 327
 328 void Smt2::addOperator(Kind kind, const std::string& name) {
 329   Debug("parser") << "Smt2::addOperator( " << kind << ", " << name << " )"
 330                   << std::endl;
 331   Parser::addOperator(kind);
 332   operatorKindMap[name] = kind;
 333 }
 334
 335 Kind Smt2::getOperatorKind(const std::string& name) const {
 336   // precondition: isOperatorEnabled(name)
 337   return operatorKindMap.find(name)->second;
 338 }
 339
 340 bool Smt2::isOperatorEnabled(const std::string& name) const {
 341   return operatorKindMap.find(name) != operatorKindMap.end();
 342 }
 343
 344 bool Smt2::isTheoryEnabled(Theory theory) const {
 345   switch(theory) {
 346   case THEORY_ARRAYS:
 347     return d_logic.isTheoryEnabled(theory::THEORY_ARRAYS);
 348   case THEORY_BITVECTORS:
 349     return d_logic.isTheoryEnabled(theory::THEORY_BV);
 350   case THEORY_CORE:
 351     return true;
 352   case THEORY_DATATYPES:
 353     return d_logic.isTheoryEnabled(theory::THEORY_DATATYPES);
 354   case THEORY_INTS:
 355     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 356       d_logic.areIntegersUsed() && ( !d_logic.areRealsUsed() );
 357   case THEORY_REALS:
 358     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 359       ( !d_logic.areIntegersUsed() ) && d_logic.areRealsUsed();
 360   case THEORY_REALS_INTS:
 361     return d_logic.isTheoryEnabled(theory::THEORY_ARITH) &&
 362       d_logic.areIntegersUsed() && d_logic.areRealsUsed();
 363   case THEORY_QUANTIFIERS:
 364     return d_logic.isQuantified();
 365   case THEORY_SETS:
 366     return d_logic.isTheoryEnabled(theory::THEORY_SETS);
 367   case THEORY_STRINGS:
 368     return d_logic.isTheoryEnabled(theory::THEORY_STRINGS);
 369   case THEORY_UF:
 370     return d_logic.isTheoryEnabled(theory::THEORY_UF);
 371   case THEORY_FP:
 372     return d_logic.isTheoryEnabled(theory::THEORY_FP);
 373   case THEORY_SEP:
 374     return d_logic.isTheoryEnabled(theory::THEORY_SEP);
 375   default:
 376     std::stringstream ss;
 377     ss << "internal error: unsupported theory " << theory;
 378     throw ParserException(ss.str());
 379   }
 380 }
 381
 382 bool Smt2::logicIsSet() {
 383   return d_logicSet;
 384 }
 385
 386 Expr Smt2::getExpressionForNameAndType(const std::string& name, Type t) {
 387   if(sygus() && name[0]=='-' &&
 388     name.find_first_not_of("0123456789", 1) == std::string::npos) {
 389     //allow unary minus in sygus
 390     return getExprManager()->mkConst(Rational(name));
 391   }else if(isAbstractValue(name)) {
 392     return mkAbstractValue(name);
 393   }else{
 394     return Parser::getExpressionForNameAndType(name, t);
 395   }
 396 }
 397
 398 Expr Smt2::mkDefineFunRec(
 399     const std::string& fname,
 400     const std::vector<std::pair<std::string, Type> >& sortedVarNames,
 401     Type t,
 402     std::vector<Expr>& flattenVars)
 403 {
 404   std::vector<Type> sorts;
 405   for (const std::pair<std::string, CVC4::Type>& svn : sortedVarNames)
 406   {
 407     sorts.push_back(svn.second);
 408   }
 409
 410   // make the flattened function type, add bound variables
 411   // to flattenVars if the defined function was given a function return type.
 412   Type ft = mkFlatFunctionType(sorts, t, flattenVars);
 413
 414   // allow overloading
 415   return mkVar(fname, ft, ExprManager::VAR_FLAG_NONE, true);
 416 }
 417
 418 void Smt2::pushDefineFunRecScope(
 419     const std::vector<std::pair<std::string, Type> >& sortedVarNames,
 420     Expr func,
 421     const std::vector<Expr>& flattenVars,
 422     std::vector<Expr>& bvs,
 423     bool bindingLevel)
 424 {
 425   pushScope(bindingLevel);
 426
 427   // bound variables are those that are explicitly named in the preamble
 428   // of the define-fun(s)-rec command, we define them here
 429   for (const std::pair<std::string, CVC4::Type>& svn : sortedVarNames)
 430   {
 431     Expr v = mkBoundVar(svn.first, svn.second);
 432     bvs.push_back(v);
 433   }
 434
 435   bvs.insert(bvs.end(), flattenVars.begin(), flattenVars.end());
 436 }
 437
 438 void Smt2::reset() {
 439   d_logicSet = false;
 440   d_logic = LogicInfo();
 441   operatorKindMap.clear();
 442   d_lastNamedTerm = std::pair<Expr, std::string>();
 443   this->Parser::reset();
 444
 445   if( !strictModeEnabled() ) {
 446     addTheory(Smt2::THEORY_CORE);
 447   }
 448 }
 449
 450 void Smt2::resetAssertions() {
 451   // Remove all declarations except the ones at level 0.
 452   while (this->scopeLevel() > 0) {
 453     this->popScope();
 454   }
 455 }
 456
 457 void Smt2::setLogic(std::string name) {
 458
 459   if(sygus()) {
 460     // non-smt2-standard sygus logic names go here (http://sygus.seas.upenn.edu/files/sygus.pdf Section 3.2)
 461     if(name == "Arrays") {
 462       name = "A";
 463     }else if(name == "Reals") {
 464       name = "LRA";
 465     }
 466   }
 467
 468   d_logicSet = true;
 469   if(logicIsForced()) {
 470     d_logic = getForcedLogic();
 471   } else {
 472     d_logic = name;
 473   }
 474
 475   // if sygus is enabled, we must enable UF, datatypes, integer arithmetic and
 476   // higher-order
 477   if(sygus()) {
 478     if (!d_logic.isQuantified())
 479     {
 480       warning("Logics in sygus are assumed to contain quantifiers.");
 481       warning("Omit QF_ from the logic to avoid this warning.");
 482     }
 483     // get unlocked copy, modify, copy and relock
 484     LogicInfo log(d_logic.getUnlockedCopy());
 485     log.enableQuantifiers();
 486     log.enableTheory(theory::THEORY_UF);
 487     log.enableTheory(theory::THEORY_DATATYPES);
 488     log.enableIntegers();
 489     log.enableHigherOrder();
 490     d_logic = log;
 491     d_logic.lock();
 492   }
 493
 494   // Core theory belongs to every logic
 495   addTheory(THEORY_CORE);
 496
 497   if(d_logic.isTheoryEnabled(theory::THEORY_UF)) {
 498     addTheory(THEORY_UF);
 499   }
 500
 501   if(d_logic.isTheoryEnabled(theory::THEORY_ARITH)) {
 502     if(d_logic.areIntegersUsed()) {
 503       if(d_logic.areRealsUsed()) {
 504         addTheory(THEORY_REALS_INTS);
 505       } else {
 506         addTheory(THEORY_INTS);
 507       }
 508     } else if(d_logic.areRealsUsed()) {
 509       addTheory(THEORY_REALS);
 510     }
 511
 512     if (d_logic.areTranscendentalsUsed())
 513     {
 514       addTheory(THEORY_TRANSCENDENTALS);
 515     }
 516   }
 517
 518   if(d_logic.isTheoryEnabled(theory::THEORY_ARRAYS)) {
 519     addTheory(THEORY_ARRAYS);
 520   }
 521
 522   if(d_logic.isTheoryEnabled(theory::THEORY_BV)) {
 523     addTheory(THEORY_BITVECTORS);
 524   }
 525
 526   if(d_logic.isTheoryEnabled(theory::THEORY_DATATYPES)) {
 527     addTheory(THEORY_DATATYPES);
 528   }
 529
 530   if(d_logic.isTheoryEnabled(theory::THEORY_SETS)) {
 531     addTheory(THEORY_SETS);
 532   }
 533
 534   if(d_logic.isTheoryEnabled(theory::THEORY_STRINGS)) {
 535     addTheory(THEORY_STRINGS);
 536   }
 537
 538   if(d_logic.isQuantified()) {
 539     addTheory(THEORY_QUANTIFIERS);
 540   }
 541
 542   if (d_logic.isTheoryEnabled(theory::THEORY_FP)) {
 543     addTheory(THEORY_FP);
 544   }
 545
 546   if (d_logic.isTheoryEnabled(theory::THEORY_SEP)) {
 547     addTheory(THEORY_SEP);
 548   }
 549
 550 }/* Smt2::setLogic() */
 551
 552 void Smt2::setInfo(const std::string& flag, const SExpr& sexpr) {
 553   // TODO: ???
 554 }
 555
 556 void Smt2::setOption(const std::string& flag, const SExpr& sexpr) {
 557   // TODO: ???
 558 }
 559
 560 void Smt2::checkThatLogicIsSet() {
 561   if( ! logicIsSet() ) {
 562     if(strictModeEnabled()) {
 563       parseError("set-logic must appear before this point.");
 564     } else {
 565       warning("No set-logic command was given before this point.");
 566       warning("CVC4 will make all theories available.");
 567       warning("Consider setting a stricter logic for (likely) better performance.");
 568       warning("To suppress this warning in the future use (set-logic ALL).");
 569
 570       setLogic("ALL");
 571
 572       Command* c = new SetBenchmarkLogicCommand("ALL");
 573       c->setMuted(true);
 574       preemptCommand(c);
 575     }
 576   }
 577 }
 578
 579 /* The include are managed in the lexer but called in the parser */
 580 // Inspired by http://www.antlr3.org/api/C/interop.html
 581
 582 static bool newInputStream(const std::string& filename, pANTLR3_LEXER lexer) {
 583   Debug("parser") << "Including " << filename << std::endl;
 584   // Create a new input stream and take advantage of built in stream stacking
 585   // in C target runtime.
 586   //
 587   pANTLR3_INPUT_STREAM    in;
 588 #ifdef CVC4_ANTLR3_OLD_INPUT_STREAM
 589   in = antlr3AsciiFileStreamNew((pANTLR3_UINT8) filename.c_str());
 590 #else /* CVC4_ANTLR3_OLD_INPUT_STREAM */
 591   in = antlr3FileStreamNew((pANTLR3_UINT8) filename.c_str(), ANTLR3_ENC_8BIT);
 592 #endif /* CVC4_ANTLR3_OLD_INPUT_STREAM */
 593   if( in == NULL ) {
 594     Debug("parser") << "Can't open " << filename << std::endl;
 595     return false;
 596   }
 597   // Same thing as the predefined PUSHSTREAM(in);
 598   lexer->pushCharStream(lexer, in);
 599   // restart it
 600   //lexer->rec->state->tokenStartCharIndex      = -10;
 601   //lexer->emit(lexer);
 602
 603   // Note that the input stream is not closed when it EOFs, I don't bother
 604   // to do it here, but it is up to you to track streams created like this
 605   // and destroy them when the whole parse session is complete. Remember that you
 606   // don't want to do this until all tokens have been manipulated all the way through
 607   // your tree parsers etc as the token does not store the text it just refers
 608   // back to the input stream and trying to get the text for it will abort if you
 609   // close the input stream too early.
 610
 611   //TODO what said before
 612   return true;
 613 }
 614
 615 void Smt2::includeFile(const std::string& filename) {
 616   // security for online version
 617   if(!canIncludeFile()) {
 618     parseError("include-file feature was disabled for this run.");
 619   }
 620
 621   // Get the lexer
 622   AntlrInput* ai = static_cast<AntlrInput*>(getInput());
 623   pANTLR3_LEXER lexer = ai->getAntlr3Lexer();
 624   // get the name of the current stream "Does it work inside an include?"
 625   const std::string inputName = ai->getInputStreamName();
 626
 627   // Find the directory of the current input file
 628   std::string path;
 629   size_t pos = inputName.rfind('/');
 630   if(pos != std::string::npos) {
 631     path = std::string(inputName, 0, pos + 1);
 632   }
 633   path.append(filename);
 634   if(!newInputStream(path, lexer)) {
 635     parseError("Couldn't open include file `" + path + "'");
 636   }
 637 }
 638
 639 void Smt2::mkSygusConstantsForType( const Type& type, std::vector<CVC4::Expr>& ops ) {
 640   if( type.isInteger() ){
 641     ops.push_back(getExprManager()->mkConst(Rational(0)));
 642     ops.push_back(getExprManager()->mkConst(Rational(1)));
 643   }else if( type.isBitVector() ){
 644     unsigned sz = ((BitVectorType)type).getSize();
 645     BitVector bval0(sz, (unsigned int)0);
 646     ops.push_back( getExprManager()->mkConst(bval0) );
 647     BitVector bval1(sz, (unsigned int)1);
 648     ops.push_back( getExprManager()->mkConst(bval1) );
 649   }else if( type.isBoolean() ){
 650     ops.push_back(getExprManager()->mkConst(true));
 651     ops.push_back(getExprManager()->mkConst(false));
 652   }
 653   //TODO : others?
 654 }
 655
 656 //  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)
 657 //  This method may also add new elements pairwise into datatypes/sorts/ops/cnames/cargs in the case of non-flat gterms.
 658 void Smt2::processSygusGTerm( CVC4::SygusGTerm& sgt, int index,
 659                               std::vector< CVC4::Datatype >& datatypes,
 660                               std::vector< CVC4::Type>& sorts,
 661                               std::vector< std::vector<CVC4::Expr> >& ops,
 662                               std::vector< std::vector<std::string> >& cnames,
 663                               std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 664                               std::vector< bool >& allow_const,
 665                               std::vector< std::vector< std::string > >& unresolved_gterm_sym,
 666                               std::vector<CVC4::Expr>& sygus_vars,
 667                               std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin, std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr,
 668                               CVC4::Type& ret, bool isNested ){
 669   if( sgt.d_gterm_type==SygusGTerm::gterm_op || sgt.d_gterm_type==SygusGTerm::gterm_let ){
 670     Debug("parser-sygus") << "Add " << sgt.d_expr << " to datatype " << index
 671                           << ", isLet = "
 672                           << (sgt.d_gterm_type == SygusGTerm::gterm_let)
 673                           << std::endl;
 674     Kind oldKind;
 675     Kind newKind = kind::UNDEFINED_KIND;
 676     //convert to UMINUS if one child of MINUS
 677     if( sgt.d_children.size()==1 && sgt.d_expr==getExprManager()->operatorOf(kind::MINUS) ){
 678       oldKind = kind::MINUS;
 679       newKind = kind::UMINUS;
 680     }
 681     if( newKind!=kind::UNDEFINED_KIND ){
 682       Expr newExpr = getExprManager()->operatorOf(newKind);
 683       Debug("parser-sygus") << "Replace " << sgt.d_expr << " with " << newExpr << std::endl;
 684       sgt.d_expr = newExpr;
 685       std::string oldName = kind::kindToString(oldKind);
 686       std::string newName = kind::kindToString(newKind);
 687       size_t pos = 0;
 688       if((pos = sgt.d_name.find(oldName, pos)) != std::string::npos){
 689         sgt.d_name.replace(pos, oldName.length(), newName);
 690       }
 691     }
 692     ops[index].push_back( sgt.d_expr );
 693     cnames[index].push_back( sgt.d_name );
 694     cargs[index].push_back( std::vector< CVC4::Type >() );
 695     for( unsigned i=0; i<sgt.d_children.size(); i++ ){
 696       std::stringstream ss;
 697       ss << datatypes[index].getName() << "_" << ops[index].size() << "_arg_" << i;
 698       std::string sub_dname = ss.str();
 699       //add datatype for child
 700       Type null_type;
 701       pushSygusDatatypeDef( null_type, sub_dname, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym );
 702       int sub_dt_index = datatypes.size()-1;
 703       //process child
 704       Type sub_ret;
 705       processSygusGTerm( sgt.d_children[i], sub_dt_index, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym,
 706                          sygus_vars, sygus_to_builtin, sygus_to_builtin_expr, sub_ret, true );
 707       //process the nested gterm (either pop the last datatype, or flatten the argument)
 708       Type tt = processSygusNestedGTerm( sub_dt_index, sub_dname, datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym,
 709                                          sygus_to_builtin, sygus_to_builtin_expr, sub_ret );
 710       cargs[index].back().push_back(tt);
 711     }
 712     //if let, must create operator
 713     if( sgt.d_gterm_type==SygusGTerm::gterm_let ){
 714       processSygusLetConstructor( sgt.d_let_vars, index, datatypes, sorts, ops, cnames, cargs,
 715                                   sygus_vars, sygus_to_builtin, sygus_to_builtin_expr );
 716     }
 717   }else if( sgt.d_gterm_type==SygusGTerm::gterm_constant ){
 718     if( sgt.getNumChildren()!=0 ){
 719       parseError("Bad syntax for Sygus Constant.");
 720     }
 721     std::vector< Expr > consts;
 722     mkSygusConstantsForType( sgt.d_type, consts );
 723     Debug("parser-sygus") << "...made " << consts.size() << " constants." << std::endl;
 724     for( unsigned i=0; i<consts.size(); i++ ){
 725       std::stringstream ss;
 726       ss << consts[i];
 727       Debug("parser-sygus") << "...add for constant " << ss.str() << std::endl;
 728       ops[index].push_back( consts[i] );
 729       cnames[index].push_back( ss.str() );
 730       cargs[index].push_back( std::vector< CVC4::Type >() );
 731     }
 732     allow_const[index] = true;
 733   }else if( sgt.d_gterm_type==SygusGTerm::gterm_variable || sgt.d_gterm_type==SygusGTerm::gterm_input_variable ){
 734     if( sgt.getNumChildren()!=0 ){
 735       parseError("Bad syntax for Sygus Variable.");
 736     }
 737     Debug("parser-sygus") << "...process " << sygus_vars.size() << " variables." << std::endl;
 738     for( unsigned i=0; i<sygus_vars.size(); i++ ){
 739       if( sygus_vars[i].getType()==sgt.d_type ){
 740         std::stringstream ss;
 741         ss << sygus_vars[i];
 742         Debug("parser-sygus") << "...add for variable " << ss.str() << std::endl;
 743         ops[index].push_back( sygus_vars[i] );
 744         cnames[index].push_back( ss.str() );
 745         cargs[index].push_back( std::vector< CVC4::Type >() );
 746       }
 747     }
 748   }else if( sgt.d_gterm_type==SygusGTerm::gterm_nested_sort ){
 749     ret = sgt.d_type;
 750   }else if( sgt.d_gterm_type==SygusGTerm::gterm_unresolved ){
 751     if( isNested ){
 752       if( isUnresolvedType(sgt.d_name) ){
 753         ret = getSort(sgt.d_name);
 754       }else{
 755         //nested, unresolved symbol...fail
 756         std::stringstream ss;
 757         ss << "Cannot handle nested unresolved symbol " << sgt.d_name << std::endl;
 758         parseError(ss.str());
 759       }
 760     }else{
 761       //will resolve when adding constructors
 762       unresolved_gterm_sym[index].push_back(sgt.d_name);
 763     }
 764   }else if( sgt.d_gterm_type==SygusGTerm::gterm_ignore ){
 765
 766   }
 767 }
 768
 769 bool Smt2::pushSygusDatatypeDef( Type t, std::string& dname,
 770                                   std::vector< CVC4::Datatype >& datatypes,
 771                                   std::vector< CVC4::Type>& sorts,
 772                                   std::vector< std::vector<CVC4::Expr> >& ops,
 773                                   std::vector< std::vector<std::string> >& cnames,
 774                                   std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 775                                   std::vector< bool >& allow_const,
 776                                   std::vector< std::vector< std::string > >& unresolved_gterm_sym ){
 777   sorts.push_back(t);
 778   datatypes.push_back(Datatype(dname));
 779   ops.push_back(std::vector<Expr>());
 780   cnames.push_back(std::vector<std::string>());
 781   cargs.push_back(std::vector<std::vector<CVC4::Type> >());
 782   allow_const.push_back(false);
 783   unresolved_gterm_sym.push_back(std::vector< std::string >());
 784   return true;
 785 }
 786
 787 bool Smt2::popSygusDatatypeDef( std::vector< CVC4::Datatype >& datatypes,
 788                                  std::vector< CVC4::Type>& sorts,
 789                                  std::vector< std::vector<CVC4::Expr> >& ops,
 790                                  std::vector< std::vector<std::string> >& cnames,
 791                                  std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 792                                  std::vector< bool >& allow_const,
 793                                  std::vector< std::vector< std::string > >& unresolved_gterm_sym ){
 794   sorts.pop_back();
 795   datatypes.pop_back();
 796   ops.pop_back();
 797   cnames.pop_back();
 798   cargs.pop_back();
 799   allow_const.pop_back();
 800   unresolved_gterm_sym.pop_back();
 801   return true;
 802 }
 803
 804 Type Smt2::processSygusNestedGTerm( int sub_dt_index, std::string& sub_dname, std::vector< CVC4::Datatype >& datatypes,
 805                                     std::vector< CVC4::Type>& sorts,
 806                                     std::vector< std::vector<CVC4::Expr> >& ops,
 807                                     std::vector< std::vector<std::string> >& cnames,
 808                                     std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 809                                     std::vector< bool >& allow_const,
 810                                     std::vector< std::vector< std::string > >& unresolved_gterm_sym,
 811                                     std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin,
 812                                     std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr, Type sub_ret ) {
 813   Type t = sub_ret;
 814   Debug("parser-sygus") << "Argument is ";
 815   if( t.isNull() ){
 816     //then, it is the datatype we constructed, which should have a single constructor
 817     t = mkUnresolvedType(sub_dname);
 818     Debug("parser-sygus") << "inline flattening of (auxiliary, local) datatype " << t << std::endl;
 819     Debug("parser-sygus") << ": to compute type, construct ground term witnessing the grammar, #cons=" << cargs[sub_dt_index].size() << std::endl;
 820     if( cargs[sub_dt_index].empty() ){
 821       parseError(std::string("Internal error : datatype for nested gterm does not have a constructor."));
 822     }
 823     Expr sop = ops[sub_dt_index][0];
 824     Type curr_t;
 825     if( sop.getKind() != kind::BUILTIN && ( sop.isConst() || cargs[sub_dt_index][0].empty() ) ){
 826       curr_t = sop.getType();
 827       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;
 828       // only cache if it is a singleton datatype (has unique expr)
 829       if (ops[sub_dt_index].size() == 1)
 830       {
 831         sygus_to_builtin_expr[t] = sop;
 832         // store that term sop has dedicated sygus type t
 833         if (d_sygus_bound_var_type.find(sop) == d_sygus_bound_var_type.end())
 834         {
 835           d_sygus_bound_var_type[sop] = t;
 836         }
 837       }
 838     }else{
 839       std::vector< Expr > children;
 840       if( sop.getKind() != kind::BUILTIN ){
 841         children.push_back( sop );
 842       }
 843       for( unsigned i=0; i<cargs[sub_dt_index][0].size(); i++ ){
 844         std::map< CVC4::Type, CVC4::Expr >::iterator it = sygus_to_builtin_expr.find( cargs[sub_dt_index][0][i] );
 845         if( it==sygus_to_builtin_expr.end() ){
 846           if( sygus_to_builtin.find( cargs[sub_dt_index][0][i] )==sygus_to_builtin.end() ){
 847             std::stringstream ss;
 848             ss << "Missing builtin type for type " << cargs[sub_dt_index][0][i] << "!" << std::endl;
 849             ss << "Builtin types are currently : " << std::endl;
 850             for( std::map< CVC4::Type, CVC4::Type >::iterator itb = sygus_to_builtin.begin(); itb != sygus_to_builtin.end(); ++itb ){
 851               ss << "  " << itb->first << " -> " << itb->second << std::endl;
 852             }
 853             parseError(ss.str());
 854           }
 855           Type bt = sygus_to_builtin[cargs[sub_dt_index][0][i]];
 856           Debug("parser-sygus") << ":  child " << i << " introduce type elem for " << cargs[sub_dt_index][0][i] << " " << bt << std::endl;
 857           std::stringstream ss;
 858           ss << t << "_x_" << i;
 859           Expr bv = mkBoundVar(ss.str(), bt);
 860           children.push_back( bv );
 861           d_sygus_bound_var_type[bv] = cargs[sub_dt_index][0][i];
 862         }else{
 863           Debug("parser-sygus") << ":  child " << i << " existing sygus to builtin expr : " << it->second << std::endl;
 864           children.push_back( it->second );
 865         }
 866       }
 867       Kind sk = sop.getKind() != kind::BUILTIN
 868                     ? kind::APPLY_UF
 869                     : getExprManager()->operatorToKind(sop);
 870       Debug("parser-sygus") << ": operator " << sop << " with " << sop.getKind() << " " << sk << std::endl;
 871       Expr e = getExprManager()->mkExpr( sk, children );
 872       Debug("parser-sygus") << ": constructed " << e << ", which has type " << e.getType() << std::endl;
 873       curr_t = e.getType();
 874       sygus_to_builtin_expr[t] = e;
 875     }
 876     sorts[sub_dt_index] = curr_t;
 877     sygus_to_builtin[t] = curr_t;
 878   }else{
 879     Debug("parser-sygus") << "simple argument " << t << std::endl;
 880     Debug("parser-sygus") << "...removing " << datatypes.back().getName() << std::endl;
 881     //otherwise, datatype was unecessary
 882     //pop argument datatype definition
 883     popSygusDatatypeDef( datatypes, sorts, ops, cnames, cargs, allow_const, unresolved_gterm_sym );
 884   }
 885   return t;
 886 }
 887
 888 void Smt2::processSygusLetConstructor( std::vector< CVC4::Expr >& let_vars,
 889                                        int index,
 890                                        std::vector< CVC4::Datatype >& datatypes,
 891                                        std::vector< CVC4::Type>& sorts,
 892                                        std::vector< std::vector<CVC4::Expr> >& ops,
 893                                        std::vector< std::vector<std::string> >& cnames,
 894                                        std::vector< std::vector< std::vector< CVC4::Type > > >& cargs,
 895                                        std::vector<CVC4::Expr>& sygus_vars,
 896                                        std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin,
 897                                        std::map< CVC4::Type, CVC4::Expr >& sygus_to_builtin_expr ) {
 898   std::vector< CVC4::Expr > let_define_args;
 899   Expr let_body;
 900   int dindex = cargs[index].size()-1;
 901   Debug("parser-sygus") << "Process let constructor for datatype " << datatypes[index].getName() << ", #subtypes = " << cargs[index][dindex].size() << std::endl;
 902   for( unsigned i=0; i<cargs[index][dindex].size(); i++ ){
 903     Debug("parser-sygus") << "  " << i << " : " << cargs[index][dindex][i] << std::endl;
 904     if( i+1==cargs[index][dindex].size() ){
 905       std::map< CVC4::Type, CVC4::Expr >::iterator it = sygus_to_builtin_expr.find( cargs[index][dindex][i] );
 906       if( it!=sygus_to_builtin_expr.end() ){
 907         let_body = it->second;
 908       }else{
 909         std::stringstream ss;
 910         ss << datatypes[index].getName() << "_body";
 911         let_body = mkBoundVar(ss.str(), sygus_to_builtin[cargs[index][dindex][i]]);
 912         d_sygus_bound_var_type[let_body] = cargs[index][dindex][i];
 913       }
 914     }
 915   }
 916   Debug("parser-sygus") << std::endl;
 917   Debug("parser-sygus") << "Body is " << let_body << std::endl;
 918   Debug("parser-sygus") << "# let vars = " << let_vars.size() << std::endl;
 919   for( unsigned i=0; i<let_vars.size(); i++ ){
 920     Debug("parser-sygus") << "  let var " << i << " : " << let_vars[i] << " " << let_vars[i].getType() << std::endl;
 921     let_define_args.push_back( let_vars[i] );
 922   }
 923   /*
 924   Debug("parser-sygus") << "index = " << index << ", start index = " << start_index << ", #Current datatypes = " << datatypes.size() << std::endl;
 925   for( unsigned i=start_index; i<datatypes.size(); i++ ){
 926     Debug("parser-sygus") << "  datatype " << i << " : " << datatypes[i].getName() << ", #cons = " << cargs[i].size() << std::endl;
 927     if( !cargs[i].empty() ){
 928       Debug("parser-sygus") << "  operator 0 is " << ops[i][0] << std::endl;
 929       Debug("parser-sygus") << "  cons 0 has " << cargs[i][0].size() << " sub fields." << std::endl;
 930       for( unsigned j=0; j<cargs[i][0].size(); j++ ){
 931         Type bt = sygus_to_builtin[cargs[i][0][j]];
 932         Debug("parser-sygus") << "    cons 0, selector " << j << " : " << cargs[i][0][j] << " " << bt << std::endl;
 933       }
 934     }
 935   }
 936   */
 937   //last argument is the return, pop
 938   cargs[index][dindex].pop_back();
 939   collectSygusLetArgs( let_body, cargs[index][dindex], let_define_args );
 940
 941   Debug("parser-sygus") << "Make define-fun with "
 942                         << cargs[index][dindex].size()
 943                         << " operator arguments and " << let_define_args.size()
 944                         << " provided arguments..." << std::endl;
 945   if (cargs[index][dindex].size() != let_define_args.size())
 946   {
 947     std::stringstream ss;
 948     ss << "Wrong number of let body terms." << std::endl;
 949     parseError(ss.str());
 950   }
 951   std::vector<CVC4::Type> fsorts;
 952   for( unsigned i=0; i<cargs[index][dindex].size(); i++ ){
 953     Debug("parser-sygus") << "  " << i << " : " << let_define_args[i] << " " << let_define_args[i].getType() << " " << cargs[index][dindex][i] << std::endl;
 954     fsorts.push_back(let_define_args[i].getType());
 955   }
 956
 957   Type ft = getExprManager()->mkFunctionType(fsorts, let_body.getType());
 958   std::stringstream ss;
 959   ss << datatypes[index].getName() << "_let";
 960   Expr let_func = mkFunction(ss.str(), ft, ExprManager::VAR_FLAG_DEFINED);
 961   d_sygus_defined_funs.push_back( let_func );
 962   preemptCommand( new DefineFunctionCommand(ss.str(), let_func, let_define_args, let_body) );
 963
 964   ops[index].pop_back();
 965   ops[index].push_back( let_func );
 966   cnames[index].pop_back();
 967   cnames[index].push_back(ss.str());
 968
 969   //mark function as let constructor
 970   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() );
 971   d_sygus_let_func_to_body[let_func] = let_body;
 972   d_sygus_let_func_to_num_input_vars[let_func] = let_vars.size();
 973 }
 974
 975
 976 void Smt2::collectSygusLetArgs( CVC4::Expr e, std::vector< CVC4::Type >& sygusArgs, std::vector< CVC4::Expr >& builtinArgs ) {
 977   if( e.getKind()==kind::BOUND_VARIABLE ){
 978     if( std::find( builtinArgs.begin(), builtinArgs.end(), e )==builtinArgs.end() ){
 979       builtinArgs.push_back( e );
 980       sygusArgs.push_back( d_sygus_bound_var_type[e] );
 981       if( d_sygus_bound_var_type[e].isNull() ){
 982         std::stringstream ss;
 983         ss << "While constructing body of let gterm, can't map " << e << " to sygus type." << std::endl;
 984         parseError(ss.str());
 985       }
 986     }
 987   }else{
 988     for( unsigned i=0; i<e.getNumChildren(); i++ ){
 989       collectSygusLetArgs( e[i], sygusArgs, builtinArgs );
 990     }
 991   }
 992 }
 993
 994 void Smt2::setSygusStartIndex( std::string& fun, int startIndex,
 995                                std::vector< CVC4::Datatype >& datatypes,
 996                                std::vector< CVC4::Type>& sorts,
 997                                std::vector< std::vector<CVC4::Expr> >& ops ) {
 998   if( startIndex>0 ){
 999     CVC4::Datatype tmp_dt = datatypes[0];
1000     Type tmp_sort = sorts[0];
1001     std::vector< Expr > tmp_ops;
1002     tmp_ops.insert( tmp_ops.end(), ops[0].begin(), ops[0].end() );
1003     datatypes[0] = datatypes[startIndex];
1004     sorts[0] = sorts[startIndex];
1005     ops[0].clear();
1006     ops[0].insert( ops[0].end(), ops[startIndex].begin(), ops[startIndex].end() );
1007     datatypes[startIndex] = tmp_dt;
1008     sorts[startIndex] = tmp_sort;
1009     ops[startIndex].clear();
1010     ops[startIndex].insert( ops[startIndex].begin(), tmp_ops.begin(), tmp_ops.end() );
1011   }else if( startIndex<0 ){
1012     std::stringstream ss;
1013     ss << "warning: no symbol named Start for synth-fun " << fun << std::endl;
1014     warning(ss.str());
1015   }
1016 }
1017
1018 void Smt2::mkSygusDatatype( CVC4::Datatype& dt, std::vector<CVC4::Expr>& ops,
1019                             std::vector<std::string>& cnames, std::vector< std::vector< CVC4::Type > >& cargs,
1020                             std::vector<std::string>& unresolved_gterm_sym,
1021                             std::map< CVC4::Type, CVC4::Type >& sygus_to_builtin ) {
1022   Debug("parser-sygus") << "Making sygus datatype " << dt.getName() << std::endl;
1023   Debug("parser-sygus") << "  add constructors..." << std::endl;
1024
1025   Debug("parser-sygus") << "SMT2 sygus parser : Making constructors for sygus datatype " << dt.getName() << std::endl;
1026   Debug("parser-sygus") << "  add constructors..." << std::endl;
1027   // size of cnames changes, this loop must check size
1028   for (unsigned i = 0; i < cnames.size(); i++)
1029   {
1030     bool is_dup = false;
1031     bool is_dup_op = false;
1032     for (unsigned j = 0; j < i; j++)
1033     {
1034       if( ops[i]==ops[j] ){
1035         is_dup_op = true;
1036         if( cargs[i].size()==cargs[j].size() ){
1037           is_dup = true;
1038           for( unsigned k=0; k<cargs[i].size(); k++ ){
1039             if( cargs[i][k]!=cargs[j][k] ){
1040               is_dup = false;
1041               break;
1042             }
1043           }
1044         }
1045         if( is_dup ){
1046           break;
1047         }
1048       }
1049     }
1050     Debug("parser-sygus") << "SYGUS CONS " << i << " : ";
1051     if( is_dup ){
1052       Debug("parser-sygus") << "--> Duplicate gterm : " << ops[i] << std::endl;
1053       ops.erase( ops.begin() + i, ops.begin() + i + 1 );
1054       cnames.erase( cnames.begin() + i, cnames.begin() + i + 1 );
1055       cargs.erase( cargs.begin() + i, cargs.begin() + i + 1 );
1056       i--;
1057     }
1058     else
1059     {
1060       std::shared_ptr<SygusPrintCallback> spc;
1061       if (is_dup_op)
1062       {
1063         Debug("parser-sygus") << "--> Duplicate gterm operator : " << ops[i]
1064                               << std::endl;
1065         // make into define-fun
1066         std::vector<Type> ltypes;
1067         for (unsigned j = 0, size = cargs[i].size(); j < size; j++)
1068         {
1069           ltypes.push_back(sygus_to_builtin[cargs[i][j]]);
1070         }
1071         std::vector<Expr> largs;
1072         Expr lbvl = makeSygusBoundVarList(dt, i, ltypes, largs);
1073
1074         // make the let_body
1075         std::vector<Expr> children;
1076         if (ops[i].getKind() != kind::BUILTIN)
1077         {
1078           children.push_back(ops[i]);
1079         }
1080         children.insert(children.end(), largs.begin(), largs.end());
1081         Kind sk = ops[i].getKind() != kind::BUILTIN
1082                       ? kind::APPLY_UF
1083                       : getExprManager()->operatorToKind(ops[i]);
1084         Expr body = getExprManager()->mkExpr(sk, children);
1085         // replace by lambda
1086         ops[i] = getExprManager()->mkExpr(kind::LAMBDA, lbvl, body);
1087         Debug("parser-sygus") << "  ...replace op : " << ops[i] << std::endl;
1088         // callback prints as the expression
1089         spc = std::make_shared<printer::SygusExprPrintCallback>(body, largs);
1090       }
1091       else
1092       {
1093         std::map<Expr, Expr>::iterator it =
1094             d_sygus_let_func_to_body.find(ops[i]);
1095         if (it != d_sygus_let_func_to_body.end())
1096         {
1097           Debug("parser-sygus") << "--> Let expression " << ops[i] << std::endl;
1098           Expr let_body = it->second;
1099           std::vector<Expr> let_args = d_sygus_let_func_to_vars[ops[i]];
1100           unsigned let_num_input_args =
1101               d_sygus_let_func_to_num_input_vars[ops[i]];
1102           // the operator is just the body for the arguments
1103           std::vector<Type> ltypes;
1104           for (unsigned j = 0, size = let_args.size(); j < size; j++)
1105           {
1106             ltypes.push_back(let_args[j].getType());
1107           }
1108           std::vector<Expr> largs;
1109           Expr lbvl = makeSygusBoundVarList(dt, i, ltypes, largs);
1110           Expr sbody = let_body.substitute(let_args, largs);
1111           ops[i] = getExprManager()->mkExpr(kind::LAMBDA, lbvl, sbody);
1112           Debug("parser-sygus") << "  ...replace op : " << ops[i] << std::endl;
1113           // callback prints as a let expression
1114           spc = std::make_shared<printer::SygusLetExprPrintCallback>(
1115               let_body, let_args, let_num_input_args);
1116         }
1117         else if (ops[i].getType().isBitVector() && ops[i].isConst())
1118         {
1119           Debug("parser-sygus") << "--> Bit-vector constant " << ops[i] << " ("
1120                                 << cnames[i] << ")" << std::endl;
1121           // Since there are multiple output formats for bit-vectors and
1122           // we are required by sygus standards to print in the exact input
1123           // format given by the user, we use a print callback to custom print
1124           // the given name.
1125           spc = std::make_shared<printer::SygusNamedPrintCallback>(cnames[i]);
1126         }
1127         else if (isDefinedFunction(ops[i]))
1128         {
1129           Debug("parser-sygus") << "--> Defined function " << ops[i]
1130                                 << std::endl;
1131           // turn f into (lammbda (x) (f x))
1132           // in a degenerate case, ops[i] may be a defined constant,
1133           // in which case we do not replace by a lambda.
1134           if (ops[i].getType().isFunction())
1135           {
1136             std::vector<Type> ftypes =
1137                 static_cast<FunctionType>(ops[i].getType()).getArgTypes();
1138             std::vector<Expr> largs;
1139             Expr lbvl = makeSygusBoundVarList(dt, i, ftypes, largs);
1140             largs.insert(largs.begin(), ops[i]);
1141             Expr body = getExprManager()->mkExpr(kind::APPLY_UF, largs);
1142             ops[i] = getExprManager()->mkExpr(kind::LAMBDA, lbvl, body);
1143             Debug("parser-sygus") << "  ...replace op : " << ops[i]
1144                                   << std::endl;
1145           }
1146           else
1147           {
1148             Debug("parser-sygus") << "  ...replace op : " << ops[i]
1149                                   << std::endl;
1150           }
1151           // keep a callback to say it should be printed with the defined name
1152           spc = std::make_shared<printer::SygusNamedPrintCallback>(cnames[i]);
1153         }
1154         else
1155         {
1156           Debug("parser-sygus") << "--> Default case " << ops[i] << std::endl;
1157         }
1158       }
1159       // must rename to avoid duplication
1160       std::stringstream ss;
1161       ss << dt.getName() << "_" << i << "_" << cnames[i];
1162       cnames[i] = ss.str();
1163       Debug("parser-sygus") << "  construct the datatype " << cnames[i] << "..."
1164                             << std::endl;
1165       // add the sygus constructor
1166       dt.addSygusConstructor(ops[i], cnames[i], cargs[i], spc);
1167       Debug("parser-sygus") << "  finished constructing the datatype"
1168                             << std::endl;
1169     }
1170   }
1171
1172   Debug("parser-sygus") << "  add constructors for unresolved symbols..." << std::endl;
1173   if( !unresolved_gterm_sym.empty() ){
1174     std::vector< Type > types;
1175     Debug("parser-sygus") << "...resolve " << unresolved_gterm_sym.size() << " symbols..." << std::endl;
1176     for( unsigned i=0; i<unresolved_gterm_sym.size(); i++ ){
1177       Debug("parser-sygus") << "  resolve : " << unresolved_gterm_sym[i] << std::endl;
1178       if( isUnresolvedType(unresolved_gterm_sym[i]) ){
1179         Debug("parser-sygus") << "    it is an unresolved type." << std::endl;
1180         Type t = getSort(unresolved_gterm_sym[i]);
1181         if( std::find( types.begin(), types.end(), t )==types.end() ){
1182           types.push_back( t );
1183           //identity element
1184           Type bt = dt.getSygusType();
1185           Debug("parser-sygus") << ":  make identity function for " << bt << ", argument type " << t << std::endl;
1186
1187           std::stringstream ss;
1188           ss << t << "_x";
1189           Expr var = mkBoundVar(ss.str(), bt);
1190           std::vector<Expr> lchildren;
1191           lchildren.push_back(
1192               getExprManager()->mkExpr(kind::BOUND_VAR_LIST, var));
1193           lchildren.push_back(var);
1194           Expr id_op = getExprManager()->mkExpr(kind::LAMBDA, lchildren);
1195
1196           // empty sygus callback (should not be printed)
1197           std::shared_ptr<SygusPrintCallback> sepc =
1198               std::make_shared<printer::SygusEmptyPrintCallback>();
1199
1200           //make the sygus argument list
1201           std::vector< Type > id_carg;
1202           id_carg.push_back( t );
1203           dt.addSygusConstructor(id_op, unresolved_gterm_sym[i], id_carg, sepc);
1204
1205           //add to operators
1206           ops.push_back( id_op );
1207         }
1208       }else{
1209         Debug("parser-sygus") << "    ignore. (likely a free let variable)" << std::endl;
1210       }
1211     }
1212   }
1213 }
1214
1215 Expr Smt2::makeSygusBoundVarList(Datatype& dt,
1216                                  unsigned i,
1217                                  const std::vector<Type>& ltypes,
1218                                  std::vector<Expr>& lvars)
1219 {
1220   for (unsigned j = 0, size = ltypes.size(); j < size; j++)
1221   {
1222     std::stringstream ss;
1223     ss << dt.getName() << "_x_" << i << "_" << j;
1224     Expr v = mkBoundVar(ss.str(), ltypes[j]);
1225     lvars.push_back(v);
1226   }
1227   return getExprManager()->mkExpr(kind::BOUND_VAR_LIST, lvars);
1228 }
1229
1230 InputLanguage Smt2::getLanguage() const
1231 {
1232   ExprManager* em = getExprManager();
1233   return em->getOptions().getInputLanguage();
1234 }
1235
1236 }/* CVC4::parser namespace */
1237 }/* CVC4 namespace */