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

Example 26 with Expr

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

the class CVC4NativeAPITest method checkSimpleLRAUnsat.

@Test
public void checkSimpleLRAUnsat() {
    // x + y = x * y AND x - 1 = 0
    Expr zero = exprMgr.mkConst(new Rational(0));
    Expr one = exprMgr.mkConst(new Rational(1));
    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), exprMgr.mkExpr(Kind.PLUS, varX, varY));
    Expr assertion2 = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.MINUS, varX, one), zero);
    smtEngine.assertFormula(assertion1);
    smtEngine.assertFormula(assertion2);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.UNSAT);
}

Example 27 with Expr

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

the class CVC4NativeAPITest method checkSimpleInequalitySat.

@Test
public void checkSimpleInequalitySat() {
    Expr zero = exprMgr.mkConst(new Rational(0));
    Expr one = exprMgr.mkConst(new Rational(1));
    Expr assertion = exprMgr.mkExpr(Kind.NOT, exprMgr.mkExpr(Kind.EQUAL, zero, one));
    smtEngine.assertFormula(assertion);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.SAT);
}

Example 28 with Expr

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

the class CVC4NativeAPITest method checkLIAUfsUnsat.

@Test
public void checkLIAUfsUnsat() {
    // 0 <= f(x)
    // 0 <= f(y)
    // f(x) + f(y) = x
    // f(x) + f(y) = y
    // f(x) = x + 1
    // f(y) = y - 1
    Expr zero = exprMgr.mkConst(new Rational(0));
    Expr one = exprMgr.mkConst(new Rational(1));
    Type intType = exprMgr.integerType();
    // Type for UFs later
    Type intToInt = exprMgr.mkFunctionType(intType, intType);
    Expr xInt = exprMgr.mkVar("x", intType);
    Expr yInt = exprMgr.mkVar("y", intType);
    // declare UFs
    Expr f = exprMgr.mkVar("f", intToInt);
    // Apply UFs
    Expr fx = exprMgr.mkExpr(Kind.APPLY_UF, f, xInt);
    Expr fy = exprMgr.mkExpr(Kind.APPLY_UF, f, yInt);
    Expr plus = exprMgr.mkExpr(Kind.PLUS, fx, fy);
    // Make some assumptions
    Expr assumptions1 = exprMgr.mkExpr(Kind.AND, exprMgr.mkExpr(Kind.LEQ, zero, fx), exprMgr.mkExpr(Kind.LEQ, zero, fy));
    Expr assumptions2 = exprMgr.mkExpr(Kind.AND, exprMgr.mkExpr(Kind.EQUAL, fx, exprMgr.mkExpr(Kind.PLUS, xInt, one)), exprMgr.mkExpr(Kind.EQUAL, fy, exprMgr.mkExpr(Kind.MINUS, yInt, one)), exprMgr.mkExpr(Kind.EQUAL, plus, xInt), exprMgr.mkExpr(Kind.EQUAL, plus, yInt));
    smtEngine.assertFormula(assumptions1);
    smtEngine.assertFormula(assumptions2);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.UNSAT);
}

Example 29 with Expr

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

the class CVC4NativeAPITest method checkSimpleLIAEqualitySat.

@Test
public void checkSimpleLIAEqualitySat() {
    Expr one = exprMgr.mkConst(new Rational(1));
    Expr two = exprMgr.mkConst(new Rational(2));
    Expr assertion = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.PLUS, one, one), two);
    smtEngine.assertFormula(assertion);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.SAT);
}

Example 30 with Expr

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

the class CVC4NativeAPITest method setupArrayQuant.

/**
 * Sets up array and quantifier based formulas for tests.
 */
public void setupArrayQuant() {
    Expr zero = exprMgr.mkConst(new Rational(0));
    Expr one = exprMgr.mkConst(new Rational(1));
    x = exprMgr.mkVar("x", exprMgr.integerType());
    ArrayType arrayType = exprMgr.mkArrayType(exprMgr.integerType(), exprMgr.integerType());
    array = exprMgr.mkVar("a", arrayType);
    aAtxEq0 = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.SELECT, array, x), zero);
    aAtxEq1 = exprMgr.mkExpr(Kind.EQUAL, exprMgr.mkExpr(Kind.SELECT, array, x), one);
}