--%>
Assignment Help - homework help

Explain LURCH

LURCH (Menzies et al. 2004) uses random search to explore a state machine’s state space. Because the search is random, it gives no guarantee that the state space has been exhaustively explored, so LURCH cannot be used for verification. However, any errors it finds are real errors, so it can be used for debugging. It can find assertion violations, deadlock, and cycle-based errors (no-progress cycles, and violations of temporal logic properties specified as acceptance cycles); finding cycle-based errors requires a state hash table. LURCH’s input format is concurrent finite-state machines, where transitions may be specified by C code.

In a case study of running model checkers to find seeded errors in a flight guidance system model, NuSMV (a model checker not described in this report) had a mean runtime of 2 hours where LURCH had a mean runtime of 3 minutes, yet LURCH found 40 of the 44 seeded errors that NuSMV found. In other demonstration problems, LURCH found all the errors that SPIN found when SPIN could terminate with the given resources. LURCH is claimed to scale to larger problems, and tends to use a stable amount of resources.

   Related Questions in Programming Languages

  • Q : Explain Wrapper classes Wrapper

    Wrapper classes: The Java's primitive types are not of object types. The wrapper classes are stated in the java.lang package. They comprises of a class for each and every primitive type: Boolean, Byte, Double, Float, Integer, Long & Short and Char

    		•
  • Q : Procedural and object-oriented programs

    Illustrate the difference between the procedural and object-oriented programs in brief.

    		•
  • Q : Implementation of XML Web Services

    Explain the implementation of XML Web Services to be found in .NET. In particular, explain the role of the wsdl.exe tool.

    		•
  • Q : Inventory management system in UML

    Mini-Case The Hatcher Company is in the process of developing a new inventory management system.  One of the event handling processes in that system is Receive Supplier Shipments.  The (inexperie

    		•
  • Q : C Sharp console application Write a

    Write a simple C# console application to consume the service to generate uniform random numbers.

    		•
  • Q : What is Process Process : It is an

    Process: It is an individual thread-of-control to which an execution time slice is assigned by the operating system.

    		•
  • Q : Define Statement Statement : The

    Statement: The fundamental building block of Java method. There are numerous different kinds of statement in Java, for example, the assignment statement, if statement, while loop and return statement.

    		•
  • Q : State-space Reduction in Promela model

    State-space Reduction: Two language statements are used to reduce the number of states in a Promela model: atomic and d-step. 1553_state</span></p> </div> <!-- /comment-box --> </li> </td> </tr><tr> <td> <li> <div class=

    Q : Explain Untyped Allocations Untyped

    Untyped Allocations: In C/C++ untyped allocations such as malloc, calloc, and realloc can easily be used to create overlays, which again require translation overhead to keep the corresponding non-overlaid objects consistent.

    Q : Define Object serialization Object

    Object serialization: The writing of an object's contents in such a manner that its state can be restored, either at a later time, or in a different procedure. This can be employed to store objects between runs of a program, or to transfer or shifts o

    		•