Ctl model checking for processing simple xpath queries loredana afanasiev 1massimo franceschet,2 maarten marx maarten de rijke1 1informatics institute, university of amsterdam. Model checking an introduction meeting 3, csci 5535, spring 2013 announcements – temporal logics: ltl and ctl – explicit-state model checking. Pdf | much research has been done in the field of model-checking complex systems (either hardware or software) approaches that use ex-plicit state modelling mostly use bit vectors to represent . Timed ctl model checking lecture #16 of advanced model checking joost-pieter katoen lehrstuhl 2: software modeling & veriﬁcation model checking ltl and ctl . In this chapter, we will explore a method of model checking that avoids the state explosion problem in some cases by representing the kripke model implicitly with a boolean formula this allows the ctl model checking algorithm to be implemented using well developed automatic techniques for manipulating boolean formulas.
Ctl model checking lecture #4 of principles of model checking joost-pieter katoen software modeling and veriﬁcation group aﬃliated to university of twente, formal methods and tools. 2 spoiler • this stuff really works • symbolic model checking is a massive success in the model-checking field • slam took the pl world by storm. Analysis engines include ctl model checking and computation of performance measures model-checking department of computer science 226 atanasoff hall ames, ia . Kripkestructure to model a system what is kripke a kripkestructure over a set of atomic propositions ctl -model-checking ctl-model-checking ltl-model-checking.
Learning to verify branching time properties a learning based model checking algorithm for ctl is that ctl afosr muri award f49620-02-1-0325 and nsf 04-29639. I apologies if my title is vague, i'm trying to apply ctl/ltl model-checking on some system written in java, however, i still don't understand how to reach a result using either of the approaches. Distributed ctl model-checking and counterexample search [bcy02, bh05, bou05], and modal mu-calculus [bbw02] were also studied in [bp07] we presented a distributed veriﬁcation of reachability, liveness and home state properties.
Model checking is based on checking models so, we first start by explaining what models are, and will make clear that so-called labeled transition systems , a model that is akin to automata, are suitable for modeling sequential, as well as multi-threading programs. Summary of lecture v ctl model checking: general ideas ctl model checking: the labeling algorithm labeling algorithm in details ctl model checking: theoretical issues. Easy usage of the plugin by providing seperate views on the model checking process (namely an advanced and a basic view) supported temporal logics cover full modal μ -calculus and ctl visualization and interaction of underlying game-based algorithm as sib-graph. Model checking for ectl and ctlf is p-complete too for logics like ctl + , fctl, and ectl + , the exact complexity is not known it has been observed [ces86, theo 62] that for ctl + the problem is np-hard. In general, ctl model checking is more efficient than ltl model checking however, for checking the compliance of a certain treatment of which we do not know the order between the individual actions, a ctl formula consists of a disjunction of each possible order of actions and considers the existence of each order.
Ctl models = kripke structures 5 example pp q p,q 12 3 4 6 ctl: computation tree logics defined on computation trees of kripke structures 2 7 ctl model checking . Emerson and i gave a polynomial algorithm for solving the model checking problem for the logic ctl the gure below shows the structure of a typical to model check . This gives a model checking algorithm for fair ctl (just do all the above using bdd operations) 17 symbolic model checking with fairness constraints. Ctl: computation tree logic a branching-time logic, meaning that its model of time is a tree-like structure in which the future is not determined there are different paths in the future, any one of which might be an actual path that is realized. Model checking with ctl based upon: logic in computer science huth and ryan 2000 (148-215) model checking clarke, grumberg and peled 1999 (1-26).
Video created by eit digital for the course quantitative model checking we introduce labeled transition systems (lts), the syntax and semantics of computational tree logic (ctl) and discuss the model checking algorithms that are necessary to . 653 computation of paths up: 65 reachability analysis previous: 651 reductions of the 652 predicates and ctl model checking in this section, you will find a short introduction into the syntax and semantics of ctl (computational tree logic), and a description of the state predicates used in ina . Model checking algorithms for ctl how to check whether state s satisﬁes computerecursivelythe set of states that satisfy check whether state s belongs to sat(). 02246: model checking we will introduce a logic called probabilistic ctl (pctl), and how to do model checking for it this is an extension of ctl in which we can .
Model-checking idea of model-checking: establish that the system is a model of a formula (doing a search) ctl model checking smv input language and its semantics. I know that symbolic model checking is state space traversal based on representations of states sets and transition relations as formulas like in ctl using models like kripke model i know the theory .