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/********************* */
/*! \file evaluator_white.cpp
** \verbatim
** Top contributors (to current version):
** Aina Niemetz, Andres Noetzli
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
** in the top-level source directory and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
#include <vector>
#include "expr/node.h"
#include "test_smt.h"
#include "theory/bv/theory_bv_utils.h"
#include "theory/evaluator.h"
#include "theory/rewriter.h"
#include "util/rational.h"
namespace CVC4 {
using namespace theory;
namespace test {
class TestTheoryWhiteEvaluator : public TestSmt
{
};
TEST_F(TestTheoryWhiteEvaluator, simple)
{
TypeNode bv64Type = d_nodeManager->mkBitVectorType(64);
Node w = d_nodeManager->mkVar("w", bv64Type);
Node x = d_nodeManager->mkVar("x", bv64Type);
Node y = d_nodeManager->mkVar("y", bv64Type);
Node z = d_nodeManager->mkVar("z", bv64Type);
Node zero = d_nodeManager->mkConst(BitVector(64, (unsigned int)0));
Node one = d_nodeManager->mkConst(BitVector(64, (unsigned int)1));
Node c1 = d_nodeManager->mkConst(BitVector(
64,
(unsigned int)0b0000000100000101001110111001101000101110011101011011110011100111));
Node c2 = d_nodeManager->mkConst(BitVector(
64,
(unsigned int)0b0000000100000101001110111001101000101110011101011011110011100111));
Node t = d_nodeManager->mkNode(
kind::ITE, d_nodeManager->mkNode(kind::EQUAL, y, one), x, w);
std::vector<Node> args = {w, x, y, z};
std::vector<Node> vals = {c1, zero, one, c1};
Evaluator eval;
Node r = eval.eval(t, args, vals);
ASSERT_EQ(r,
Rewriter::rewrite(t.substitute(
args.begin(), args.end(), vals.begin(), vals.end())));
}
TEST_F(TestTheoryWhiteEvaluator, loop)
{
TypeNode bv64Type = d_nodeManager->mkBitVectorType(64);
Node w = d_nodeManager->mkBoundVar(bv64Type);
Node x = d_nodeManager->mkVar("x", bv64Type);
Node zero = d_nodeManager->mkConst(BitVector(1, (unsigned int)0));
Node one = d_nodeManager->mkConst(BitVector(64, (unsigned int)1));
Node c = d_nodeManager->mkConst(BitVector(
64,
(unsigned int)0b0001111000010111110000110110001101011110111001101100000101010100));
Node largs = d_nodeManager->mkNode(kind::BOUND_VAR_LIST, w);
Node lbody = d_nodeManager->mkNode(
kind::BITVECTOR_CONCAT, bv::utils::mkExtract(w, 62, 0), zero);
Node lambda = d_nodeManager->mkNode(kind::LAMBDA, largs, lbody);
Node t =
d_nodeManager->mkNode(kind::BITVECTOR_AND,
d_nodeManager->mkNode(kind::APPLY_UF, lambda, one),
d_nodeManager->mkNode(kind::APPLY_UF, lambda, x));
std::vector<Node> args = {x};
std::vector<Node> vals = {c};
Evaluator eval;
Node r = eval.eval(t, args, vals);
ASSERT_EQ(r,
Rewriter::rewrite(t.substitute(
args.begin(), args.end(), vals.begin(), vals.end())));
}
TEST_F(TestTheoryWhiteEvaluator, strIdOf)
{
Node a = d_nodeManager->mkConst(String("A"));
Node empty = d_nodeManager->mkConst(String(""));
Node one = d_nodeManager->mkConst(Rational(1));
Node two = d_nodeManager->mkConst(Rational(2));
std::vector<Node> args;
std::vector<Node> vals;
Evaluator eval;
{
Node n = d_nodeManager->mkNode(kind::STRING_STRIDOF, a, empty, one);
Node r = eval.eval(n, args, vals);
ASSERT_EQ(r, Rewriter::rewrite(n));
}
{
Node n = d_nodeManager->mkNode(kind::STRING_STRIDOF, a, a, one);
Node r = eval.eval(n, args, vals);
ASSERT_EQ(r, Rewriter::rewrite(n));
}
{
Node n = d_nodeManager->mkNode(kind::STRING_STRIDOF, a, empty, two);
Node r = eval.eval(n, args, vals);
ASSERT_EQ(r, Rewriter::rewrite(n));
}
{
Node n = d_nodeManager->mkNode(kind::STRING_STRIDOF, a, a, two);
Node r = eval.eval(n, args, vals);
ASSERT_EQ(r, Rewriter::rewrite(n));
}
}
TEST_F(TestTheoryWhiteEvaluator, code)
{
Node a = d_nodeManager->mkConst(String("A"));
Node empty = d_nodeManager->mkConst(String(""));
std::vector<Node> args;
std::vector<Node> vals;
Evaluator eval;
// (str.code "A") ---> 65
{
Node n = d_nodeManager->mkNode(kind::STRING_TO_CODE, a);
Node r = eval.eval(n, args, vals);
ASSERT_EQ(r, d_nodeManager->mkConst(Rational(65)));
}
// (str.code "") ---> -1
{
Node n = d_nodeManager->mkNode(kind::STRING_TO_CODE, empty);
Node r = eval.eval(n, args, vals);
ASSERT_EQ(r, d_nodeManager->mkConst(Rational(-1)));
}
}
} // namespace test
} // namespace CVC4
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