--%>
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 : What is no-arg constructor no-arg

    no-arg constructor: It is a constructor which takes no arguments. By default, each and every class without an explicit constructor has a default no-arg constructor with the public access. Its role is entirely to invoke the no-arg constructor of the in

    		•
  • Q : What is Static method Static method :

    Static method: The static method (also termed as a class method) is one with static reserved word in its header. The static methods vary from all other methods in that they are not related with any specific instance of the class to which they fit in.

    		•
  • Q : Describe Locale Locale : The details

    Locale: The details which are dependent on conventions and customs approved by a specific country or culture. Within programs, this influences issues like number and date formatting, for example. Designers of classes must be sensitive to the locale-sp

    		•
  • Q : Explain Java PathFinder Java

    Java PathFinder: Java PathFinder (JPF) is a model checker that has been developed as a verification and testing environment for Java programs (Figure shown below). It is available as open source at SourceForge.net (JPF website). It consists of a custo

    		•
  • Q : Non linear dynamic model equation to

    Could you please show the steps from non linear dynamic model equation to linear equation?

    		•
  • Q : What is an IP address IP address : An

    IP address: An Internet Protocol (abbreviated as IP) address for a networked computer. Presently, IP addresses comprises of 4-byte values, written in dotted decimal notation, like 129.12.0.1. In future, IP addresses will be 16-bytes long to accommodat

    		•
  • Q : Explain Fully qualified class name

    Fully qualified class name: The name of a class, comprising any package name and including class name. The class outline is as follows:     package oddments;    class Outer

    		•
  • Q : What are ORB-IOR-a servant-a POA manager

    In CORBA, what are i) an ORB ii) an IOR iii) a servant iv) a POA and v) a POA manager?

    		•
  • Q : File handling modes and corresponding

    Q : Define Constant Constant : It is the

    Constant: It is the memory block where value can be stored once although can’t modify later on throughout program execution. Example: const int pi =3.14;

    		•