--%>
Assignment Help - homework help

Property Specifications of Java Pathfinder

Property Specifications: The most straightforward way to specify and check simple safety properties in JPF is to use Java assertions inside the application under analysis. This allows the specification of properties that only depend on the application data values (e.g., parameter value intervals). Violations are caught by JPF. The drawbacks of this method are that it requires access to the application sources, and that it can significantly increase the state space if the property requires evaluation state itself (e.g., for properties implemented as automatons).

The other way to specify properties is by using gov.nasa.jpf.Property or gov.nasa.jpf.GenericProperty instances to encapsulate property checks.

50_property spec.jpg

The user typically creates an instance of such a class and provides an implementation for its check() method which does the main work for checking the property. The check()method is evaluated after each transition. If it returns false and termination has been requested, the search process ends, and all violated properties are printed (which potentially includes error traces).

JPF comes with generic Property classes for the following properties:

  • No Deadlocks
  • No Assertion Violation
  • No Uncaught Exceptions (i.e., not handled inside the application)

   Related Questions in Programming Languages

  • Q : Programming with C# QUESTION 1      

    QUESTION 1       The following UML diagram describes an abstract class Customer. This class is to be used as part of a Company's inventory system. The inventory system will contain many different types of customers.  A separate s

    		•
  • Q : Define the term Instance Define the

    Define the term Instance: It is a synonym for object. The objects of a class are instantiated whenever a class constructor is invoked through the new operator.

    		•
  • Q : ID of TC Trustcenter Publisher and

    For how long are ID of TC Trustcenter Publisher and certificates of developer valid?

    		•
  • Q : Write the benefits of DLR Write the

    Write the benefits of DLR?

    		•
  • Q : How class can be prevented from

    How class can be prevented from inheriting further?

    		•
  • Q : Define the term Punctuation Define the

    Define the term Punctuation: Symbols like commas and semicolons that a compiler employs to understand the structure of the program.

    		•
  • Q : What is an Immutable object Immutable

    Immutable object: It is an object whose state might not be modified. The objects of String class are immutable, for example - their length and contents are fixed once formed.

    		•
  • Q : Explain the benefits of using MTS

    Explain the benefits of using MTS?

    		•
  • Q : Define Scope Scope : A language's scope

    Scope: A language's scope rules establish how broadly variables, methods and classes are visible in a class or program. The local variables contain a scope restricted to the block in which they are stated, for example. Private methods and variables co

    		•
  • Q : Define Container Abstractions Container

    Container Abstractions: Abstractions for containers (such as lists, stacks, sets, or queues) may represent just the state of a container—e.g., full or empty—and abstract away from the actual container content. The list operations also need

    		•