Examples with Sum com.sri.ai.grinder.group.Sum used on opensource projects

Example 1 with Sum

use of com.sri.ai.grinder.group.Sum in project aic-expresso by aic-sri-international.

the class MultiQuantifierEliminationProblemTest method cornerCasesTest.

@Test
public void cornerCasesTest() {
    MultiQuantifierEliminationProblem problem;
    Expression problemExpression;
    problem = new DefaultMultiQuantifierEliminationProblem(new Sum(), list(), list(), parse("false"), parse("0"));
    problemExpression = parse("sum({{ (on ) 0 : false }})");
    assertEquals(problemExpression, problem.toExpression());
    try {
        problem = new DefaultMultiQuantifierEliminationProblem(new Conjunction(), list(parse("I")), list(parse("Integer"), parse("Boolean")), parse("I > 3 and I < 10 and not J"), parse("true"));
    } catch (AssertionError e) {
        if (!e.getMessage().contains("DefaultMultiQuantifierEliminationProblem")) {
            fail("Should have thrown an error containing 'DefaultMultiQuantifierEliminationProblem'");
        }
    }
}

Example 2 with Sum

use of com.sri.ai.grinder.group.Sum in project aic-expresso by aic-sri-international.

the class SamplingProceduralAttachmentSingleQuantifierEliminatorTest method test.

@Test
public void test() {
    String intervalString = "0..10";
    Context context = new TrueContext(new DifferenceArithmeticTheory(true, true));
    MultiQuantifierEliminationProblem problem = new DefaultMultiQuantifierEliminationProblem(new Sum(), list(parse("I")), list(parse(intervalString)), parse("I != 3"), parse("I^2"));
    SamplingProceduralAttachmentSingleQuantifierEliminator eliminator = new SamplingProceduralAttachmentSingleQuantifierEliminator(new CommonSimplifier(), new Random());
    // SHOULD NOT HAVE TO
    context = problem.extend(context);
    Expression sampler = eliminator.solve(problem, context);
    println(sampler);
    Rewriter rewriter = new CombiningTopRewriter(new CommonSimplifier(), ProceduralAttachments.getProceduralAttachmentsTopRewriter(context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
    println(rewriter.apply(sampler, context));
}

Example 3 with Sum

use of com.sri.ai.grinder.group.Sum in project aic-expresso by aic-sri-international.

the class SummationOnDifferenceArithmeticAndPolynomialStepSolverTest method runTest.

private void runTest(Expression variable, String constraintString, Expression body, Expression expected, Context context) {
    Theory theory = context.getTheory();
    SingleVariableDifferenceArithmeticConstraint constraint = new SingleVariableDifferenceArithmeticConstraint(variable, true, theory);
    constraint = (SingleVariableDifferenceArithmeticConstraint) constraint.conjoin(parse(constraintString), context);
    Expression typeExpression = context.getTypeExpressionOfRegisteredSymbol(variable);
    SingleQuantifierEliminationProblem problem = new DefaultSingleQuantifierEliminationProblem(new Sum(), variable, typeExpression, constraint, body);
    ExpressionStepSolver stepSolver = new SummationOnDifferenceArithmeticAndPolynomialStepSolver(problem);
    Expression actual = stepSolver.solve(context);
    expected = simplify(expected, context);
    System.out.println("sum({{ (on " + variable + " in " + GrinderUtil.getTypeExpressionOfExpression(variable, context) + ") " + body + " : " + constraintString + " }} = " + actual + "\n");
    if (!expected.equals(actual)) {
        Expression difference = apply(MINUS, expected, actual);
        Expression differenceResult = simplify(difference, context);
        if (!differenceResult.equals(ZERO)) {
            System.err.println("Expressions are not equal and even difference is not zero");
            System.err.println("Expected: " + expected);
            System.err.println("Actual: " + actual);
            System.err.println("Difference: " + differenceResult);
            fail("Expressions are not equal and even difference is not zero. Expected: " + expected + ", actual: " + actual);
        }
    }
// TODO: correctness test against grounding
}

Example 4 with Sum

use of com.sri.ai.grinder.group.Sum in project aic-expresso by aic-sri-international.

the class LinearRealArithmeticTheoryTest method runSummationTest.

private void runSummationTest(Expression variable, String constraintString, String bodyString, Expression expected, Simplifier simplifier, Context context) {
    Expression typeExpression = context.getTypeExpressionOfRegisteredSymbol(variable);
    runQuantifierTest(variable, constraintString, bodyString, expected, "summation for " + bodyString, (SingleVariableConstraint c, Expression b) -> new SummationOnLinearRealArithmeticAndPolynomialStepSolver(new DefaultSingleQuantifierEliminationProblem(new Sum(), variable, typeExpression, c, b)), context);
}

Example 5 with Sum

use of com.sri.ai.grinder.group.Sum in project aic-expresso by aic-sri-international.

the class AbstractTranslationBasedTheory method getSingleVariableConstraintModelCountingStepSolver.

@Override
public ExpressionLiteralSplitterStepSolver getSingleVariableConstraintModelCountingStepSolver(SingleVariableConstraint constraint, Context context) {
    Expression index = constraint.getVariable();
    Expression indexType = context.getTypeExpressionOfRegisteredSymbol(index);
    DefaultSingleQuantifierEliminationProblem problem = new DefaultSingleQuantifierEliminationProblem(new Sum(), index, indexType, constraint, ONE);
    return getSingleQuantifierEliminatorStepSolver(problem, context);
}