--%>
Assignment Help - homework help

Explain VeriSoft

VeriSoft (Godefroid, 2005) is a model checker for C and C++; other languages can be used, but components in other languages are treated as black boxes. VeriSoft has been used to find defects in very large telecommunications programs (Chandra, Godefroid, and Palm 2002). It is available for download at the VeriSoft website. This package includes a version of VeriSoft for analyzing multiprocess C or C++ programs whose processes communicate via a predefined set of types of communication objects. It is a “stateless” model checker, in that visited states are not saved. It uses clever partial-order reduction search algorithms utilizing program analysis to avoid revisiting states, and guarantees complete coverage of the state space to some depth, while preserving correctness properties. Verisoft can search for four basic types of errors:

  • Deadlocks.
  • Divergences. A divergence occurs when a process does not attempt to communicate with the rest of the system for more than a given (user-specified) amount of time.
  • Livelocks. A livelock occurs when a process is blocked during a sequence of more than a given (user-specified) number of successive states in the state space.
  • Violations of state assertions, the assertions having been stated using a special operation VS_assert(boolean_expr).

To represent non-determinism in the model or environment, VeriSoft provides a special operation VS_toss to express non-deterministic choice, which is like Verify.random in Java PathFinder.

   Related Questions in Programming Languages

  • Q : Describe Method result Method result :

    Method result: The value returned from a method through a return statement. The kind of expression in the return statement should match the return type declared in method header.

    		•
  • Q : Various controls of ASP.NET AJAX Name

    Name the various controls of ASP.NET AJAX?

    		•
  • Q : Define the term Writer class Writer

    Writer class: It is a sub class of the Writer abstract, stated in the java.io package. The writer classes translate output from Unicode to the host-dependent character set encoding.

    		•
  • Q : What is an Exception handler Exception

    Exception handler: It is a try statement which acts as an exception handler - a place where exception objects are dealt and caught with.

    		•
  • Q : Level-triggering interrupt Normal 0

    Normal 0 false false

  • Q : Problem on Vectors Create a vector

    Create a vector representing x coordinates of a measurement with 20 points between 0 and 10. Create another vector y representing fake measurements which are related to the above x values as y = 2.3 x – 1.2. Next add random (normal, Gaussian) noise to the vector

    		•
  • Q : Define Bootstrap classes Bootstrap

    Bootstrap classes: The classes which make up the Java Platform Core Application Programming Interface (API), like those found in the java.lang, java.io and java.io packages.

    		•
  • Q : Define Short-circuit operator

    Short-circuit operator: It is an operator in which only as a lot of operands are computed as are required to determine the final outcome of the operation. The logical-and (&&) and logical-or (||) operators are most general illustration, though

    		•
  • Q : Retrieve the text for ORA-12705 Normal

    Normal 0 false false

  • Q : Simple Sorting Program in C Shell

    Assignment: Sorting You will write a simple sorting program. This program should be invoked as follows: shell% ./fastsort -i inputfile -o outputfile

    		•