Various approaches to model checking software 6 hypothesis model checking is an algorithmic approach to analysis of finitestate systems model checking has been originally developed for analysis of hardware designs and communication protocols model checking algorithms and tools have to be tuned to be applicable to analysis of software. Merging static analysis and model checking for improved security vulnerability detection xiii. Goanna static analysis at the nist static analysis tool exposition. Download scientific diagram example program and labeled cfg for useafterfree check. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Using smt solvers for falsepositive elimination in static. Automated technology for verification and analysis atva. The commercial version of goanna is currently deployed in a wide range of. Adds syntactic information as labels in kripke structure translates static analysis problems to ctl uses model checking to analyse resulting model advantage. Goanna works primarily on a syntactic program abstraction, i. We outline its architecture and show how syntactic properties.
Refining the control structure of loops using static analysis. The system in our case is some program and a counter example a trace through the program. Model checking systems there are many other successful examples of the use of model checking in hardware and protocol verification. We shall exploit this translation to provide our examples in a clike syntax for. The remainder of this paper is organized as follows. Syntax testing needs driver program to be built that automatically sequences through a set of test cases usually stored as data.
In particular, we summarize our earlier approach on syntactic software model checking. Runtime verification of microcontroller binary code. Goanna uses the offtheshelf model checker nusmv as its core analysis engine on a. Nowadays, it is widely accepted that its application will enhance and complement existing validation techniques as simulation and test. This papers approach uses syntactic pattern recognition in attempting to improve disambiguation. In this context a bug is a violation of a syntactic model checking formula resulting in a counter example. Download scientific diagram example program and labeled cfg for useafter free check.
Use model checking for static analysis of real code. This means we can check for full ctl including syntactic liveness properties. Using model check ing to conduct static analysis allows a straightforward specification of desired program properties in computation tree logic ctl 2. Runtime verification bridges the gap between formal verification and testing by providing techniques and tools that connect executions of a software to. The approach that software model checking takes 10 is that of data abstraction. This leads to ambiguous situations in which it is not clear which word to use. It uses the nusmv model checker as the underlying veri. Unlike existing approaches goanna uses the offtheshelf nusmv model checker as its core analysis engine on a syntactic flowsensitive program abstraction.
The weaknesses in widening and narrowing can be remedied, in part, through the use of disjunctive domains 2 or techniques for re. Such a proof is often given as a counterexample, i. Goanna is based on formal software analysis techniques such as model checking. Goanna static analysis tool at sate software assurance.
The document includes the rationale behind the language of choice and it also includes the state of the art. In the syntactic topic model, words are constrained to be consistent with both. Unlike existing approaches goanna uses the otheshelf nusmv model checker as its core analysis engine on a syntactic. The complexity of designs is increasing very rapidly system on a chip. Model checking has been around for more than 20 years now, and has migrated from the purely research to the industrial arena.
We outline its architecture and show how syntactic properties can be expressed in ctl. We may now perform static analysis by formulating the properties of interest as formulas in temporal logic. Syntactic model checking uses a very coarse abstraction. Example program and labeled cfg for useafterfree check. Goanna and discuss a number of reallife experiments on larger c code projects. This abstraction includes the control ow graph cfg of a program and labels atomic propositions consisting of syntactic occurrences of interest. The chosen abstractions are, thus, pushdown models or. This is not intended to be a theoretical introduction into model checking, for which there is plenty of literature available. Unlike static program analysis, traditional software model checking has. Working on the intersection of software model checking and automated static bug.
However, we anticipate to improve on this by incorporating more semanticbased software model checking techniques such as predicate abstraction 6. Model checking driven static analysis for the real world. Merging static analysis and model checking for improved. At the same time it is also different from traditional software model checking tools by sacrificing some of the latters semantic depth and focusing on more generic bug detecting capabilities. The finitestate assumption is not unrealistic for hardware. The papers are organized in topical sections on model checking, software verification, decision procedures, lineartime analysis, tool demonstration papers, timed and stochastic systems, theory, and short papers. Part of the library and information science commons recommended citation qin, j. Software model checking typically operates on the semantic level of a program. Smtbased false positive elimination in static program analysis.
Enter a phrase, or a text, and you will have a complete analysis of the syntactic relations established between the pairs of words that compose it. An abstract specification language for static program. Thus, syntactic checking verifies that keywords, object names, operators, delimiters, and so on are placed correctly in your sql statement. Model checking 8, 25 and static analysis 21, 23 are automatedtechniquespromisingto ensure limitedcorrectness or to. Goanna is based on formal software analysis techniques such as model checking, static analysis and smt solving. Automated technology for verification and analysis. In the subsequent section 3 we present our novel framework of a staged analysis to detect tainted data and its potentially malicious use. The ctlbased model checking approach enables a high degree of flexibility in writing checks, scales to large number of checks, and can scale to large code bases.
It is provided either as a command line tool goanna central or as an integration into eclipse or visual studio called goanna studio. Model checking removes invalid paths in a second step. The fact that industry intel, ibm, motorola is starting to use model checking is encouraging. Principles of model checking christel baier and joostpieter katoen principles of model checking baier and katoen computer science our growing dependence on increasingly complex computer and software systems necessitates the development of formalisms, techniques, and tools for assessing functional properties of these systems. Moreover, these models generate words either from the syntactic or thematic context. We explain the underlying algorithms, the transformation steps from data ow results to a model. The ctl model checking problem is encoded in two steps and we illustrate this by a simple example. For example, the following embedded sql statements contain syntax errors.
We highlight how model checking and static analysis can be used on a large scale. Once the properties have been defined the tool analyses source code automatically and efficiently. For each kind of transition, the source and target locations i. A domain for analyzing the distribution of numerical values. We believe that goanna provides some realistic middle ground to address deep software issues in a practical manner. We symbolically evaluate the feasibility of such a counter example on. By ansgar fehnker, jorg brauer, ralf huuck and sean seefried. Search for wildcards or unknown words put a in your word or phrase where you want to leave a placeholder. Rules of syntax specify how language elements are sequenced to form valid statements.
Unlike existing approaches goanna uses the offtheshelf nusmv model checker as its core analysis. Below are some wellknown model checkers, categorized by whether the specification is a formula or an automaton. We outline its architecture and show how syntactic properties can be ex pressed. Red lizard software wikimili, the free encyclopedia. Model checking problem given a kripke structure m s,r,l that represents a finitestate transition graph and a temporal logic formula f find all states in s that satisfy f. Goanna uses standard symbolic ctl model checking as implemented in the nusmv 6 tool on a highlevel program abstraction. Interprocedural pointer analysis in goanna sciencedirect. We try to demonstrate how jpf execution differs from using a normal jvm, and in doing so. Locked bag 6016 university of new south wales sydney nsw 1466, australia abstract. Goanna is based on model checking techniques and performs an automated semantics code analysis for detecting quality as well as security software bugs. Syntactic software model checking ansgar fehnker, j org brauer, ralf huuck, and sean seefried national ict australia ltd. I try to explain here in a nontechnical manner what is model checking. Hardware verification is an important application of model checking and related techniques.
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