Examples with Expr com.google.api.expr.v1alpha1.Expr used on opensource projects

Example 21 with Expr

use of com.google.api.expr.v1alpha1.Expr in project java-smt by sosy-lab.

the class CVC4NativeAPITest method checkArraySat.

@Test
public void checkArraySat() {
    // ((x = 123) & (select(arr, 5) = 123)) => ((select(arr, 5) = x) & (x = 123))
    Expr five = exprMgr.mkConst(new Rational(5));
    Expr oneTwoThree = exprMgr.mkConst(new Rational(123));
    Expr xInt = exprMgr.mkVar("x_int", exprMgr.integerType());
    ArrayType arrayType = exprMgr.mkArrayType(exprMgr.integerType(), exprMgr.integerType());
    Expr arr = exprMgr.mkVar("arr", arrayType);
    Expr xEq123 = exprMgr.mkExpr(Kind.EQUAL, xInt, oneTwoThree);
    Expr selAat5Eq123 = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.SELECT, arr, five), oneTwoThree);
    Expr selAat5EqX = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.SELECT, arr, five), xInt);
    Expr leftAnd = exprMgr.mkExpr(Kind.AND, xEq123, selAat5Eq123);
    Expr rightAnd = exprMgr.mkExpr(Kind.AND, xEq123, selAat5EqX);
    Expr impl = exprMgr.mkExpr(Kind.IMPLIES, leftAnd, rightAnd);
    smtEngine.assertFormula(impl);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.SAT);
}

Example 22 with Expr

use of com.google.api.expr.v1alpha1.Expr in project java-smt by sosy-lab.

the class CVC4NativeAPITest method checkInvalidTypeOperationsCheckSat.

/**
 * It does not matter if you take an int or array or bv here, all result in the same error.
 */
@Test
public void checkInvalidTypeOperationsCheckSat() {
    BitVectorType bvType = exprMgr.mkBitVectorType(16);
    Expr bvVar = exprMgr.mkVar("bla", bvType);
    Expr assertion = exprMgr.mkExpr(Kind.AND, bvVar, bvVar);
    Exception e = assertThrows(edu.stanford.CVC4.Exception.class, () -> smtEngine.checkSat(assertion));
    assertThat(e.toString()).contains("expecting a Boolean subexpression");
}

Example 23 with Expr

use of com.google.api.expr.v1alpha1.Expr in project java-smt by sosy-lab.

the class CVC4NativeAPITest method checkSimpleLRAUnsat2.

@Test
public void checkSimpleLRAUnsat2() {
    // x + y = 3/2 AND x * y = 3/2
    Expr threeHalf = exprMgr.mkConst(new Rational(3, 2));
    Expr varX = exprMgr.mkVar("x", exprMgr.realType());
    Expr varY = exprMgr.mkVar("y", exprMgr.realType());
    Expr assertion1 = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.NONLINEAR_MULT, varX, varY), threeHalf);
    Expr assertion2 = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.PLUS, varX, varY), threeHalf);
    smtEngine.assertFormula(assertion1);
    smtEngine.assertFormula(assertion2);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.UNSAT);
}

Example 24 with Expr

use of com.google.api.expr.v1alpha1.Expr in project java-smt by sosy-lab.

the class CVC4NativeAPITest method checkLIAModel.

@Test
public void checkLIAModel() {
    // 1 + 2 = var
    // it follows that var = 3
    Expr one = exprMgr.mkConst(new Rational(1));
    Expr two = exprMgr.mkConst(new Rational(2));
    Expr var = exprMgr.mkVar(exprMgr.integerType());
    Expr assertion = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.PLUS, one, two), var);
    Result result = smtEngine.checkSat(assertion);
    assertThat(result.isSat()).isEqualTo(Sat.SAT);
    Expr assertionValue = smtEngine.getValue(assertion);
    assertThat(assertionValue.toString()).isEqualTo("true");
    assertThat(smtEngine.getValue(var).toString()).isEqualTo("3");
}

Example 25 with Expr

use of com.google.api.expr.v1alpha1.Expr in project java-smt by sosy-lab.

the class CVC4NativeAPITest method checkSimpleLRASat.

@Test
public void checkSimpleLRASat() {
    // x * y = 8/5 AND x < 4/5
    Expr fourFifth = exprMgr.mkConst(new Rational(4, 5));
    Expr eightFifth = exprMgr.mkConst(new Rational(8, 5));
    Expr varX = exprMgr.mkVar("x", exprMgr.realType());
    Expr varY = exprMgr.mkVar("y", exprMgr.realType());
    Expr assertion1 = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.NONLINEAR_MULT, varX, varY), eightFifth);
    Expr assertion2 = exprMgr.mkExpr(Kind.LT, varX, fourFifth);
    smtEngine.assertFormula(assertion1);
    smtEngine.assertFormula(assertion2);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.SAT);
}