Examples with IntExpr jkind.lustre.IntExpr used on opensource projects

Example 1 with IntExpr

use of jkind.lustre.IntExpr in project AGREE by loonwerks.

the class ReplaceFollowedByOperator method transform.

public static SimulationProgram transform(final SimulationProgram program) {
    final Program lustreProgram = program.getLustreProgram();
    if (lustreProgram.nodes.size() != 1) {
        throw new IllegalArgumentException("Only lustre programs with exactly one node are supported");
    }
    final ReplaceFollowedByOperator visitor = new ReplaceFollowedByOperator();
    final NodeBuilder nodeBuilder = new NodeBuilder(visitor.visit(lustreProgram.getMainNode()));
    // Create variable for the step number
    nodeBuilder.addInput(new VarDecl(stepVariableId, NamedType.INT));
    // Add an output for the next step number
    nodeBuilder.addOutput(new VarDecl(nextStepVariableId, NamedType.INT));
    nodeBuilder.addEquation(new Equation(new IdExpr(nextStepVariableId), new BinaryExpr(new IdExpr(stepVariableId), BinaryOp.PLUS, new IntExpr(1))));
    // Create the new lustre program using the new node
    final ProgramBuilder lustreProgramBuilder = new ProgramBuilder(lustreProgram);
    lustreProgramBuilder.clearNodes();
    lustreProgramBuilder.addNode(nodeBuilder.build());
    // Create the simulation program
    final SimulationProgramBuilder simulationProgramBuilder = new SimulationProgramBuilder(program);
    final Expr stepVariableExpr = new IdExpr(stepVariableId);
    // Ensure that the initial step is greater than the first step when simulating inductive counterexamples
    final int initialStepValue = program.getType().isInductive() ? firstStepValue + 1 : firstStepValue;
    simulationProgramBuilder.addInitialConstraint(new BinaryExpr(stepVariableExpr, BinaryOp.EQUAL, new IntExpr(initialStepValue)));
    simulationProgramBuilder.addCarryVariable(new CarryVariable(stepVariableExpr, new IdExpr(nextStepVariableId)));
    simulationProgramBuilder.setLustreProgram(lustreProgramBuilder.build());
    return simulationProgramBuilder.build();
}

Example 2 with IntExpr

use of jkind.lustre.IntExpr in project AGREE by loonwerks.

the class AgreeASTBuilder method caseArraySubExpr.

@Override
public Expr caseArraySubExpr(ArraySubExpr expr) {
    // Note: AADL/AGREE arrays are indexed starting at 1, JKind arrays are indexed starting at zero
    Expr index = new BinaryExpr(doSwitch(expr.getIndex()), BinaryOp.MINUS, new IntExpr(1));
    Expr array = doSwitch(expr.getExpr());
    return new ArrayAccessExpr(array, index);
}

Example 3 with IntExpr

use of jkind.lustre.IntExpr in project AGREE by loonwerks.

the class AgreeASTBuilder method caseIndicesExpr.

@Override
public Expr caseIndicesExpr(IndicesExpr expr) {
    AgreeTypeSystem.TypeDef arrayTypeDef = AgreeTypeSystem.infer(expr.getArray());
    if (arrayTypeDef instanceof AgreeTypeSystem.ArrayTypeDef) {
        int size = ((AgreeTypeSystem.ArrayTypeDef) arrayTypeDef).size;
        List<Expr> elems = new ArrayList<>();
        for (int i = 0; i < size; i++) {
            elems.add(new IntExpr(i + 1));
        }
        return new ArrayExpr(elems);
    }
    throw new RuntimeException("Error caseIndicesExpr");
}

Example 4 with IntExpr

use of jkind.lustre.IntExpr in project AGREE by loonwerks.

the class AgreeASTBuilder method caseGetPropertyExpr.

@Override
public Expr caseGetPropertyExpr(GetPropertyExpr expr) {
    NamedElement propName = expr.getProp();
    PropertyExpression propVal;
    if (propName instanceof Property) {
        ComponentRef cr = expr.getComponentRef();
        NamedElement compName = null;
        if (cr instanceof DoubleDotRef) {
            compName = ((DoubleDotRef) cr).getElm();
        } else if (cr instanceof ThisRef) {
            compName = curInst;
        }
        Property prop = (Property) propName;
        propVal = AgreeUtils.getPropExpression(compName, prop);
        if (propVal == null) {
            if (Activator.getDefault().getPreferenceStore().getBoolean(PreferenceConstants.PREF_UNSPECIFIED_AADL_PROPERTIES)) {
                String propInputName = unspecifiedAadlPropertyPrefix + compName.getName() + dotChar + prop.getName();
                unspecifiedAadlProperties.put(propInputName, expr);
                return new IdExpr(propInputName);
            } else {
                throw new AgreeException("Could not locate property value '" + prop.getQualifiedName() + "' in component '" + compName.getName() + "'.  Is it possible " + "that a 'this' statement is used in a context in which it wasn't supposed to?" + "  Analysis of unspecified AADL properties as inputs may be enabled in the AGREE preferences.");
            }
        }
    } else {
        propVal = AgreeUtils.getPropExpression((PropertyConstant) propName);
        if (propVal == null) {
            throw new AgreeException("Could not locate property value '" + propName.getQualifiedName());
        }
    }
    Expr res = null;
    if (propVal != null) {
        if (propVal instanceof StringLiteral) {
            // nodeStr += value.getValue() + ")";
            throw new AgreeException("Property value for '" + propName.getQualifiedName() + "' cannot be of string type");
        } else if (propVal instanceof NamedValue) {
            // EnumerationLiteral enVal = (EnumerationLiteral) absVal;
            throw new AgreeException("Property value for '" + propName.getQualifiedName() + "' cannot be of enumeration type");
        } else if (propVal instanceof BooleanLiteral) {
            BooleanLiteral value = (BooleanLiteral) propVal;
            res = new BoolExpr(value.getValue());
        } else if (propVal instanceof IntegerLiteral) {
            IntegerLiteral value = (IntegerLiteral) propVal;
            res = new IntExpr(BigInteger.valueOf((long) value.getScaledValue()));
        } else {
            assert (propVal instanceof RealLiteral);
            RealLiteral value = (RealLiteral) propVal;
            res = new RealExpr(BigDecimal.valueOf(value.getValue()));
        }
    }
    assert (res != null);
    return res;
}

Example 5 with IntExpr

use of jkind.lustre.IntExpr in project AGREE by loonwerks.

the class AgreeCalendarUtils method getExplicitCalendarNode.

public static Node getExplicitCalendarNode(String nodeName, List<IdExpr> calendar, List<Expr> clocks) {
    // filter the calendar if some clocks are not present
    List<IdExpr> filteredCalendar = new ArrayList<>();
    Map<String, List<Integer>> clockTickMap = new HashMap<>();
    for (IdExpr calId : calendar) {
        for (Expr clockExpr : clocks) {
            IdExpr clockId = (IdExpr) clockExpr;
            if (calId.id.equals(clockId.id)) {
                filteredCalendar.add(clockId);
                break;
            }
        }
    }
    int i = 0;
    for (IdExpr clockId : filteredCalendar) {
        List<Integer> ticks = clockTickMap.get(clockId.id);
        if (ticks == null) {
            ticks = new ArrayList<>();
            clockTickMap.put(clockId.id, ticks);
        }
        ticks.add(i++);
    }
    for (Expr clockExpr : clocks) {
        IdExpr clockId = (IdExpr) clockExpr;
        if (clockTickMap.get(clockId.id) == null) {
            throw new AgreeException("Clock Id '" + clockId.id + "' is not present in calendar statement");
        }
    }
    // add all of the clocks to to the inputs of the node
    List<VarDecl> inputs = new ArrayList<>();
    for (Expr clockExpr : clocks) {
        VarDecl input = new VarDecl(((IdExpr) clockExpr).id, NamedType.BOOL);
        inputs.add(input);
    }
    // the output is the variable asserting the calendar
    List<VarDecl> outputs = new ArrayList<>();
    IdExpr outputAssert = new IdExpr("__CALENDAR_ASSERTION");
    outputs.add(new VarDecl(outputAssert.id, NamedType.BOOL));
    // create a variable that counts through the calendar elements
    List<VarDecl> locals = new ArrayList<>();
    VarDecl clockCounterVar = new VarDecl("__CALANDER_COUNTER", NamedType.INT);
    locals.add(clockCounterVar);
    List<Equation> equations = new ArrayList<>();
    // create the expression for the counter variable
    IdExpr clockCountId = new IdExpr(clockCounterVar.id);
    IntExpr calendarSize = new IntExpr(BigInteger.valueOf(filteredCalendar.size() - 1));
    Expr preClockCount = new UnaryExpr(UnaryOp.PRE, clockCountId);
    Expr preLast = new BinaryExpr(preClockCount, BinaryOp.EQUAL, calendarSize);
    Expr prePlus = new BinaryExpr(preClockCount, BinaryOp.PLUS, new IntExpr(BigInteger.ONE));
    Expr ifClock = new IfThenElseExpr(preLast, new IntExpr(BigInteger.ZERO), prePlus);
    Expr clockArrow = new BinaryExpr(new IntExpr(BigInteger.ZERO), BinaryOp.ARROW, ifClock);
    Equation clockCountEq = new Equation(clockCountId, clockArrow);
    equations.add(clockCountEq);
    // create constraints for which calendar element is ticking
    Expr calendarConstraint = new BoolExpr(true);
    for (Expr clockExpr : clocks) {
        IdExpr clockId = (IdExpr) clockExpr;
        List<Integer> ticks = clockTickMap.get(clockId.id);
        Expr clockTicking = new BoolExpr(false);
        for (Integer tick : ticks) {
            Expr clockIsTickValue = new BinaryExpr(clockCountId, BinaryOp.EQUAL, new IntExpr(BigInteger.valueOf(tick.longValue())));
            clockTicking = new BinaryExpr(clockTicking, BinaryOp.OR, clockIsTickValue);
        }
        Expr ifExpr = new IfThenElseExpr(clockTicking, clockId, new UnaryExpr(UnaryOp.NOT, clockId));
        calendarConstraint = new BinaryExpr(calendarConstraint, BinaryOp.AND, ifExpr);
    }
    Equation outEq = new Equation(outputAssert, calendarConstraint);
    equations.add(outEq);
    NodeBuilder builder = new NodeBuilder(nodeName);
    builder.addInputs(inputs);
    builder.addOutputs(outputs);
    builder.addLocals(locals);
    builder.addEquations(equations);
    return builder.build();
}