Examples with BruteForceCommonInterpreter com.sri.ai.grinder.sgdpllt.interpreter.BruteForceCommonInterpreter used on opensource projects

Example 6 with BruteForceCommonInterpreter

use of com.sri.ai.grinder.sgdpllt.interpreter.BruteForceCommonInterpreter in project aic-expresso by aic-sri-international.

the class SGDPLLTTester method runModelCountingTestForSingleVariableConstraint.

private static void runModelCountingTestForSingleVariableConstraint(Expression variable, Collection<Expression> literals, Constraint constraint, boolean testAgainstBruteForce, Theory theory, Context context) {
    Expression literalsConjunction = And.make(literals);
    String problemDescription = "model counting of " + literalsConjunction + " for variable " + variable;
    output("Problem: " + problemDescription);
    Simplifier symbolicSolver = (e, p) -> computeModelCountBySolver((SingleVariableConstraint) e, p);
    SingleVariableConstraint singleVariableConstraint = (SingleVariableConstraint) constraint;
    Expression symbolicSolution = symbolicSolver.apply(singleVariableConstraint, context);
    if (Util.thereExists(new SubExpressionsDepthFirstIterator(symbolicSolution), e -> e instanceof QuantifiedExpression || Sets.isIntensionalSet(e))) {
        throw new Error("Symbolic solution is not quantifier-free: " + symbolicSolution);
    }
    output("Symbolic result: " + symbolicSolution);
    if (testAgainstBruteForce) {
        if (singleVariableConstraint.isContradiction()) {
            if (!symbolicSolution.equals(ZERO)) {
                throw new Error("Constraint is contradiction, but symbolic solver does not produce 0, but instead " + symbolicSolution);
            }
        } else {
            Expression testingVariable = singleVariableConstraint.getVariable();
            Set<Expression> allVariables = getVariableReferences(singleVariableConstraint, context);
            Collection<Expression> otherVariables = removeFromSetNonDestructively(allVariables, v -> v.equals(testingVariable));
            BinaryFunction<BruteForceCommonInterpreter, Context, Expression> fromInterpreterAndContextWithAssignmentToOtherVariablesToBruteForceSolution = (interpreter, contextWithAssignmentToOtherVariables) -> bruteForceModelCounterForVariableGivenInterpreterAndAssignmentToOtherVariables(variable, literalsConjunction, interpreter, theory, contextWithAssignmentToOtherVariables);
            testSymbolicVsBruteForceComputationForEachAssignment(theory, problemDescription, otherVariables, symbolicSolution, fromInterpreterAndContextWithAssignmentToOtherVariablesToBruteForceSolution, context);
        }
    } else {
        output("Skipping test againt brute-force.");
    }
}