Examples with RoundingMode edu.stanford.CVC4.RoundingMode used on opensource projects

Example 1 with RoundingMode

use of edu.stanford.CVC4.RoundingMode in project java-smt by sosy-lab.

the class CVC4NativeAPITest method checkSimpleFPUnsat.

@Test
public void checkSimpleFPUnsat() {
    // x * y = 1/4 AND x > 0 AND y < 0
    RoundingMode rm = RoundingMode.roundNearestTiesToAway;
    Expr rmExpr = exprMgr.mkConst(rm);
    Expr oneFourth = exprMgr.mkConst(new FloatingPoint(new FloatingPointSize(8, 24), rm, new Rational(1, 4)));
    Expr zero = exprMgr.mkConst(new FloatingPoint(new FloatingPointSize(8, 24), RoundingMode.roundNearestTiesToAway, new Rational(0)));
    Expr varX = exprMgr.mkVar("x", exprMgr.mkFloatingPointType(8, 24));
    Expr varY = exprMgr.mkVar("y", exprMgr.mkFloatingPointType(8, 24));
    Expr assertion1 = exprMgr.mkExpr(Kind.FLOATINGPOINT_EQ, exprMgr.mkExpr(Kind.FLOATINGPOINT_MULT, rmExpr, varX, varY), oneFourth);
    Expr assertion2 = exprMgr.mkExpr(Kind.FLOATINGPOINT_GT, varX, zero);
    Expr assertion3 = exprMgr.mkExpr(Kind.FLOATINGPOINT_LT, varY, zero);
    smtEngine.assertFormula(assertion1);
    smtEngine.assertFormula(assertion2);
    smtEngine.assertFormula(assertion3);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.UNSAT);
}

Example 2 with RoundingMode

use of edu.stanford.CVC4.RoundingMode in project java-smt by sosy-lab.

the class CVC4NativeAPITest method checkSimpleFPSat.

/**
 * Do not ever try to use decimals in a new Rational that has only a 0 as decimal. This will
 * SIGSEV CVC4!
 */
@Test
public void checkSimpleFPSat() {
    // x * y = 1/4
    RoundingMode rm = RoundingMode.roundNearestTiesToAway;
    Expr rmExpr = exprMgr.mkConst(rm);
    Expr oneFourth = exprMgr.mkConst(new FloatingPoint(new FloatingPointSize(8, 24), rm, new Rational(1, 4)));
    Expr varX = exprMgr.mkVar("x", exprMgr.mkFloatingPointType(8, 24));
    Expr varY = exprMgr.mkVar("y", exprMgr.mkFloatingPointType(8, 24));
    Expr assertion1 = exprMgr.mkExpr(Kind.FLOATINGPOINT_EQ, exprMgr.mkExpr(Kind.FLOATINGPOINT_MULT, rmExpr, varX, varY), oneFourth);
    smtEngine.assertFormula(assertion1);
    Result satCheck = smtEngine.checkSat();
    assertThat(satCheck.isSat()).isEqualTo(Sat.SAT);
}