src/parser/smt/smt.cpp

   1 /*********************                                                        */
   2 /*! \file smt.cpp
   3  ** \verbatim
   4  ** Original author: cconway
   5  ** Major contributors: mdeters
   6  ** Minor contributors (to current version): dejan
   7  ** This file is part of the CVC4 prototype.
   8  ** Copyright (c) 2009, 2010, 2011  The Analysis of Computer Systems Group (ACSys)
   9  ** Courant Institute of Mathematical Sciences
  10  ** New York University
  11  ** See the file COPYING in the top-level source directory for licensing
  12  ** information.\endverbatim
  13  **
  14  ** Definitions of SMT constants.
  15  **/
  16
  17 #include <ext/hash_map>
  18 namespace std {
  19   using namespace __gnu_cxx;
  20 }
  21
  22 #include "expr/type.h"
  23 #include "expr/command.h"
  24 #include "parser/parser.h"
  25 #include "parser/smt/smt.h"
  26
  27 namespace CVC4 {
  28 namespace parser {
  29
  30 std::hash_map<const std::string, Smt::Logic, CVC4::StringHashFunction> Smt::newLogicMap() {
  31   std::hash_map<const std::string, Smt::Logic, CVC4::StringHashFunction> logicMap;
  32   logicMap["QF_AX"] = QF_AX;
  33   logicMap["QF_BV"] = QF_BV;
  34   logicMap["QF_IDL"] = QF_IDL;
  35   logicMap["QF_LIA"] = QF_LIA;
  36   logicMap["QF_LRA"] = QF_LRA;
  37   logicMap["QF_NIA"] = QF_NIA;
  38   logicMap["QF_NRA"] = QF_NRA;
  39   logicMap["QF_RDL"] = QF_RDL;
  40   logicMap["QF_SAT"] = QF_SAT;
  41   logicMap["QF_UF"] = QF_UF;
  42   logicMap["QF_UFIDL"] = QF_UFIDL;
  43   logicMap["QF_UFBV"] = QF_UFBV;
  44   logicMap["QF_UFLRA"] = QF_UFLRA;
  45   logicMap["QF_UFLIA"] = QF_UFLIA;
  46   logicMap["QF_UFLIRA"] = QF_UFLIRA;
  47   logicMap["QF_UFNIA"] = QF_UFNIA;
  48   logicMap["QF_UFNIRA"] = QF_UFNIRA;
  49   logicMap["QF_UFNRA"] = QF_UFNRA;
  50   logicMap["QF_ABV"] = QF_ABV;
  51   logicMap["QF_AUFBV"] = QF_AUFBV;
  52   logicMap["QF_UFNIRA"] = QF_UFNIRA;
  53   logicMap["QF_AUFLIA"] = QF_AUFLIA;
  54   logicMap["QF_AUFLIRA"] = QF_AUFLIRA;
  55   return logicMap;
  56 }
  57
  58 Smt::Logic Smt::toLogic(const std::string& name) {
  59   static std::hash_map<const std::string, Smt::Logic, CVC4::StringHashFunction> logicMap = newLogicMap();
  60   return logicMap[name];
  61 }
  62
  63 Smt::Smt(ExprManager* exprManager, Input* input, bool strictMode, bool parseOnly) :
  64   Parser(exprManager,input,strictMode,parseOnly),
  65   d_logicSet(false) {
  66
  67   // Boolean symbols are always defined
  68   addOperator(kind::AND);
  69   addOperator(kind::EQUAL);
  70   addOperator(kind::IFF);
  71   addOperator(kind::IMPLIES);
  72   addOperator(kind::ITE);
  73   addOperator(kind::NOT);
  74   addOperator(kind::OR);
  75   addOperator(kind::XOR);
  76
  77 }
  78
  79 void Smt::addArithmeticOperators() {
  80   addOperator(kind::PLUS);
  81   addOperator(kind::MINUS);
  82   addOperator(kind::UMINUS);
  83   addOperator(kind::MULT);
  84   addOperator(kind::LT);
  85   addOperator(kind::LEQ);
  86   addOperator(kind::GT);
  87   addOperator(kind::GEQ);
  88 }
  89
  90 void Smt::addTheory(Theory theory) {
  91   switch(theory) {
  92   case THEORY_ARRAYS:
  93   case THEORY_ARRAYS_EX: {
  94     Type indexType = mkSort("Index");
  95     Type elementType = mkSort("Element");
  96     DeclarationSequence* seq = new DeclarationSequence();
  97     seq->addCommand(new DeclareTypeCommand("Index", 0, indexType));
  98     seq->addCommand(new DeclareTypeCommand("Element", 0, elementType));
  99     preemptCommand(seq);
 100
 101     defineType("Array", getExprManager()->mkArrayType(indexType, elementType));
 102
 103     addOperator(kind::SELECT);
 104     addOperator(kind::STORE);
 105     break;
 106   }
 107
 108   case THEORY_INT_ARRAYS_EX: {
 109     defineType("Array", getExprManager()->mkArrayType(getExprManager()->integerType(), getExprManager()->integerType()));
 110
 111     addOperator(kind::SELECT);
 112     addOperator(kind::STORE);
 113     break;
 114   }
 115
 116   case THEORY_EMPTY: {
 117     Type sort = mkSort("U");
 118     preemptCommand(new DeclareTypeCommand("U", 0, sort));
 119     break;
 120   }
 121
 122   case THEORY_REALS_INTS:
 123     defineType("Real", getExprManager()->realType());
 124     // falling-through on purpose, to add Ints part of RealsInts
 125
 126   case THEORY_INTS:
 127     defineType("Int", getExprManager()->integerType());
 128     addArithmeticOperators();
 129     break;
 130
 131   case THEORY_REALS:
 132     defineType("Real", getExprManager()->realType());
 133     addArithmeticOperators();
 134     break;
 135
 136   case THEORY_BITVECTORS:
 137     break;
 138
 139   default:
 140     Unhandled(theory);
 141   }
 142 }
 143
 144 bool Smt::logicIsSet() {
 145   return d_logicSet;
 146 }
 147
 148 inline void Smt::addUf() {
 149   addTheory(Smt::THEORY_EMPTY);
 150   addOperator(kind::APPLY_UF);
 151 }
 152
 153 void Smt::setLogic(const std::string& name) {
 154   d_logicSet = true;
 155   d_logic = toLogic(name);
 156
 157   switch(d_logic) {
 158   case QF_AX:
 159     addTheory(THEORY_ARRAYS_EX);
 160     break;
 161
 162   case QF_IDL:
 163   case QF_LIA:
 164   case QF_NIA:
 165     addTheory(THEORY_INTS);
 166     break;
 167
 168   case QF_RDL:
 169   case QF_LRA:
 170   case QF_NRA:
 171     addTheory(THEORY_REALS);
 172     break;
 173
 174   case QF_SAT:
 175     /* no extra symbols needed */
 176     break;
 177
 178   case QF_UFIDL:
 179   case QF_UFLIA:
 180   case QF_UFNIA:// nonstandard logic
 181     addTheory(THEORY_INTS);
 182     addUf();
 183     break;
 184
 185   case QF_UFLRA:
 186   case QF_UFNRA:
 187     addTheory(THEORY_REALS);
 188     addUf();
 189     break;
 190
 191   case QF_UFLIRA:// nonstandard logic
 192   case QF_UFNIRA:// nonstandard logic
 193     addTheory(THEORY_INTS);
 194     addTheory(THEORY_REALS);
 195     addUf();
 196     break;
 197
 198   case QF_UF:
 199     addUf();
 200     break;
 201
 202   case QF_BV:
 203     addTheory(THEORY_BITVECTORS);
 204     break;
 205
 206   case QF_ABV:
 207     addTheory(THEORY_ARRAYS_EX);
 208     addTheory(THEORY_BITVECTORS);
 209     break;
 210
 211   case QF_UFBV:
 212     addUf();
 213     addTheory(THEORY_BITVECTORS);
 214     break;
 215
 216   case QF_AUFBV:
 217     addUf();
 218     addTheory(THEORY_ARRAYS_EX);
 219     addTheory(THEORY_BITVECTORS);
 220     break;
 221
 222   case QF_AUFLIA:
 223     addTheory(THEORY_INT_ARRAYS_EX);
 224     addUf();
 225     addTheory(THEORY_INTS);
 226     break;
 227
 228   case QF_AUFLIRA:
 229     addTheory(THEORY_ARRAYS_EX);
 230     addUf();
 231     addTheory(THEORY_INTS);
 232     addTheory(THEORY_REALS);
 233     break;
 234
 235   case AUFLIA:
 236   case AUFLIRA:
 237   case AUFNIRA:
 238   case LRA:
 239   case UFLRA:
 240   case UFNIA:
 241     Unhandled(name);
 242   }
 243 }
 244
 245 }/* CVC4::parser namespace */
 246 }/* CVC4 namespace */