Examples with CNFFactorization org.logicng.transformations.cnf.CNFFactorization used on opensource projects

Example 1 with CNFFactorization

use of org.logicng.transformations.cnf.CNFFactorization in project LogicNG by logic-ng.

the class ConnectedComponentsComputerTest method testFormulaSplit.

@Test
public void testFormulaSplit() throws IOException, ParserException {
    final FormulaFactory f = new FormulaFactory();
    f.putConfiguration(CCConfig.builder().amoEncoding(CCConfig.AMO_ENCODER.PURE).build());
    final Formula parsed = FormulaReader.readPseudoBooleanFormula("src/test/resources/formulas/formula1.txt", f);
    final List<Formula> formulas = new ArrayList<>();
    final List<Formula> originalFormulas = new ArrayList<>();
    for (final Formula formula : parsed) {
        originalFormulas.add(formula);
        if (formula instanceof PBConstraint) {
            formulas.add(formula);
        } else {
            formulas.add(formula.transform(new CNFFactorization()));
        }
    }
    final Graph<Variable> constraintGraph = ConstraintGraphGenerator.generateFromCnf(formulas);
    final Set<Set<Node<Variable>>> ccs = ConnectedComponentsComputation.compute(constraintGraph);
    final List<List<Formula>> split = ConnectedComponentsComputation.splitFormulasByComponent(originalFormulas, ccs);
    assertThat(split).hasSize(4);
    assertThat(split.get(0)).hasSize(1899);
    assertThat(split.get(1)).hasSize(3);
    assertThat(split.get(2)).hasSize(3);
    assertThat(split.get(3)).hasSize(3);
}

Example 2 with CNFFactorization

use of org.logicng.transformations.cnf.CNFFactorization in project LogicNG by logic-ng.

the class ConstraintGraphGeneratorTest method testRealExample.

@Test
public void testRealExample() throws IOException, ParserException {
    final FormulaFactory f = new FormulaFactory();
    f.putConfiguration(CCConfig.builder().amoEncoding(CCConfig.AMO_ENCODER.PURE).build());
    final Formula parsed = FormulaReader.readPseudoBooleanFormula("src/test/resources/formulas/formula1.txt", f);
    final List<Formula> formulas = new ArrayList<>();
    for (final Formula formula : parsed) {
        if (formula instanceof PBConstraint) {
            formulas.add(formula);
        } else {
            formulas.add(formula.transform(new CNFFactorization()));
        }
    }
    final Graph<Variable> constraintGraph = ConstraintGraphGenerator.generateFromCnf(formulas);
    final Set<Set<Node<Variable>>> ccs = ConnectedComponentsComputation.compute(constraintGraph);
    assertThat(ccs).hasSize(4);
}

Example 3 with CNFFactorization

use of org.logicng.transformations.cnf.CNFFactorization in project LogicNG by logic-ng.

the class DnnfCompilerTest method testLargeFormula.

@Test
@LongRunningTag
public void testLargeFormula() throws IOException, ParserException {
    final FormulaFactory f = new FormulaFactory();
    f.putConfiguration(CCConfig.builder().amoEncoding(CCConfig.AMO_ENCODER.PURE).build());
    final Formula parsed = FormulaReader.readPseudoBooleanFormula("src/test/resources/formulas/formula1.txt", f);
    final DnnfFactory dnnfFactory = new DnnfFactory();
    Dnnf dnnf = dnnfFactory.compile(parsed);
    final BigInteger dnnfCount = dnnf.execute(DnnfModelCountFunction.get());
    final List<Formula> formulas = new ArrayList<>();
    final List<Formula> originalFormulas = new ArrayList<>();
    for (final Formula formula : parsed) {
        originalFormulas.add(formula);
        if (formula instanceof PBConstraint) {
            formulas.add(formula);
        } else {
            formulas.add(formula.transform(new CNFFactorization()));
        }
    }
    final Graph<Variable> constraintGraph = ConstraintGraphGenerator.generateFromCnf(formulas);
    final Set<Set<Node<Variable>>> ccs = ConnectedComponentsComputation.compute(constraintGraph);
    final List<List<Formula>> split = ConnectedComponentsComputation.splitFormulasByComponent(originalFormulas, ccs);
    BigInteger multipliedCount = BigInteger.ONE;
    for (final List<Formula> component : split) {
        dnnf = dnnfFactory.compile(f.and(component));
        multipliedCount = multipliedCount.multiply(dnnf.execute(DnnfModelCountFunction.get()));
    }
    assertThat(dnnfCount).isEqualTo(multipliedCount);
}