--%>
Assignment Help - homework help

Search and Coverage of SPIN

Search and Coverage of SPIN: SPIN has a highly optimized state exploration algorithm. It supports random, interactive and guided simulation, and both exhaustive and partial coverage, based on either depth-first or breadth-first search.

To reduce the problem of running out of memory storing the states that have been visited (so that the search will not explore them again), SPIN provides an option called bitstate hashing, also known as supertrace. Bitstate hashing uses memory as a bit vector. When a state is visited during SPIN’s exploration, its state vector is hashed to a bit in memory: the bit indicates whether the state has been visited previously. If a different state vector hashes to the same bit location, SPIN will erroneously conclude that the state has been visited and will terminate exploration from that state. This may lead to false negatives (errors may not be found), but not false positives (no false error reports).

Paradoxically, using the bitstate option may lead to increased coverage of the state space, because more of it can be explored in the given amount of memory.

   Related Questions in Programming Languages

  • Q : Define the term Catching exceptions

    Catching exceptions: Exceptions are caught in the catch clause of the try statement. Catching an exception provides the program a chance to recover from the trouble or attempt a repair for whatsoever caused it.

    		•
  • Q : What is Discrete simulation Discrete

    Discrete simulation: In a discrete simulation, the time passes at an irregular rate which is determined by the primary events of interest in simulation.

    		•
  • Q : What is an Attribute Attribute : It is

    Attribute: It is a particular usage of an instance variable. The set of attribute values held in a specific instance of a class state the current state of that instance. A class definition might impose specific constraints on the valid states of its i

    		•
  • Q : Define TCP endpoint TCP endpoint : It

    TCP endpoint: It is the combination of an IP address and Transmission Control Protocol (abbreviated as TCP) port number.

    		•
  • Q : Explain Connection handshake Connection

    Connection handshake: It is the exchange of messages among two processes in an attempt to create a connection between them.

    		•
  • Q : Explain the computer thread Explain the

    Explain the computer thread.

    		•
  • Q : Explain the good illustrations of

    Explain the good illustrations of closing XHTML elements.

    		•
  • Q : Updating the Status of an Order in SQL

    Build a procedure named STATUS_SHIP_SP which permits a company to employee in the Shipping Department to update the status of an order to add up shipping information. The BB_BASKETSTATUS table maintains a list of events for each order and hence a shopper can see the c

    		•
  • Q : What is Application programming

    Application programming interface (API): It is a set of definitions that you can make use of it in writing programs. In the perspective of Java, these are the classes, packages, and interfaces which can be utilized to build complex ap

    		•
  • Q : What are collections and generics What

    What are collections and generics?

    		•