--%>
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 : ArrayLists I. The Assignment The

    I. The Assignment The Bashemin Parking Garage contains a single lane that can hold up to ten cars.  Arriving cars enter the garage at the rear and are parked in the empty space nearest to the front.  Departing cars exit only from the front.  If a cu

    		•
  • Q : What is Automation Testing life cycle

    What is Automation Testing life cycle?

    		•
  • Q : Define Swapping Swapping : An

    Swapping: An {operating system} is frequently able to run programs which need more memory than is physically accessible on the host system. In order to do this, the complete memory needed is broken down into smaller pieces that are swapped in whenever

    		•
  • Q : Define Modem Modem : It is a

    Modem: It is a modulator-demodulator. A hardware device employed to connect a digital computer to an analogue telephone network by making analogue signals into digital signals, and vice-versa.

    		•
  • Q : System Architecture for Windows

    Tell me about the System Architecture for Windows Programming?

    		•
  • Q : State HyperText Transfer Protocol

    HyperText Transfer Protocol: The HyperText Transfer Protocol (abbreviated as HTTP) is a set of rules stated to enable a Web client (that is, browser) to interact with the Web server.

    		•
  • Q : Image reconstruction in CT using MATLAB

    What is Image reconstruction in CT using MATLAB?

    		•
  • Q : What is testing What is testing?

    What is testing?

    		•
  • Q : Explain While loop While loop: It is

    While loop: It is one of Java's three control structures employed for looping. The other two are: do loop and for loop. The while loop comprises of a Boolean expression and a loop body. The condition is tested prior to the loop body is entered for the

    		•
  • Q : What is Virtual desktop Virtual desktop

    Virtual desktop: The name employed to explain a user's graphical working area in a window manager. The name arises in the early days of graphical user interfaces whenever it was thought that such would lead to `paperless offices'. This was anticipated

    		•