Start Discovering Solved Questions and Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Liveness Properties: A liveness property asserts that something good eventually happens, and is used mainly to ensure progress. Liveness properties prevent: starvation: Processes not getting the re
Safety Properties: This property asserts that nothing bad will happen during the execution of the program (e.g., no deadlocks, or no attempts to take an item from an empty buffer). Safety properties
Generic vs. Application-Specific Properties: Properties can be generic or application specific. Illustrations of generic properties are: No array out-of-bounds accesses No divide by zeros No de
Properties : A property is a precise condition that can be checked in a given state or across a number of states (for example, to describe behaviors in the case of temporal properties). It should spec
Model Checking a Program: The operation of a model checker can be described in terms of the familiar metaphor of searching a graph (Figure shown below). The nodes of the graph represent the states of
Programs as Models Program model checkers simply model check programs directly. They often adopt a modeling notation which is—or is close to—some popular implementation language such
Model Extraction: Several program model checkers are based on automated model extraction, where program is translated into an input notation of an existing model checker (Corbett 1998; Havelund and Pr
Model Construction: The initial research projects which applied model checking to real source code built models by hand based on relatively small parts of programs (Penix et al. 2000; Havelund, Lowry,
What are the Characteristics of a good model?
Models: Building an accurate model of the system is a major and critical step in program model checking. You need to create models of both the application to be model checked and the environment in wh
As described a model checker typically examines all the possible states and execution paths in a systematic and exhaustive manner in order to check if one or more properties hold. That’s how it
Advantages of Model Checking: Many tools already exist to help detect problems in source code. Testing is clearly the most widely used technique and there are a variety of tools which support test dat
Program model checking refers to the application of model-checking techniques to software systems, and in particular to the final implementation where the code itself is the target of the analysis (Fi
Explain Hardware versus Software Model Checking?
Model checking is the collection of methods for analyzing an abstract representation of a system to determine the validity of one or more properties of interest. Much specifically, it has been defined
Wffs (Well-formed formulas): These are defined inductively by the following clauses: (i) If P is an n-ary predicate and t1, …, tn are terms, then P(t1, …,
Terms: Terms are defined inductively by the following clauses. (i) Every individual variable and every individual co
Non-Logical Vocabulary: 1. Predicates, called also relation symbols, each with its associated arity. For our needs, we may assume that the number of predicates is finite. But this is not essential. We
When air is compressed adiabatically the law connecting the absolute temperature T and the pressure P is of the form T = A.Pn where A and N are constants. Show by drawing a suitable linear graph that
The voltage v mV in a circuit is given by: v = 20 sin (200 Πt - 0.7854) where t is the time in seconds (a) State the amplitude, frequency, period and
Cards are randomly drawn one at the time and with replacement from a standard deck of 52 playing cards. (a) Find the probability of getting the fourth spades on the 10th draw. (b) Determine the expe
The number of trucks coming to a certain warehouse each day follows the Poisson distribution with λ= 8. The warehouse can handle a maximum of 12 trucks a day. What is the probability that on a
A fair die is rolled (independently) 12 times. (a) Let X denote the total number of 1’s in 12 rolls. Find the expected value and variance of X. (b) Determine the probability of obtaining exact
(a) Solve the following by: (i) First reducing the system of first order differentiat equations to a second order differential equation. (ii) Decoupling the following linear system of equation
Using the mass balance law approach, write down a set of word equations to model the transport of lead concentration. A) Draw a compartmental model to represent the diffusion of lead through th