Modular software model checking for distributed systems

Distributed systems are complex, being usually composed of several subsystems running in parallel. Modular model checking of a byzantine faulttolerant protocol. Stateevent based software model checking 3 the stateeventbased formalism presented in this paper is suitable for both sequential and concurrent systems. We present a frontend tool for translating rebeca to the languages of existing model checkers in order to model check rebeca models. We continually keep our customers business systems fresh with the latest product features and useful technology.

By watcharin leungwattanakit, cyrille artho, masami hagiya, yoshinori tanabe, mitsuharu yamamoto and. Abstract qc 20170104 distributed systems, based on their modular decomposition into processes. One of the main issues verification faces is the socalled state space explosion problem. Modular and safe eventdriven programming eecs at uc. This distributed controller model will contain enhanced hardware models, capturing the dynamics of the transducer and the e. The algorithmic analysis of control systems for large and distributed hybrid systems is considerably restricted by its computational complexity. Model checking is emerging as a popular technology for reasoning about behavioral properties of a wide variety of software artifacts including. The opposite of a modular architecture is an integrated architecture, in which no clear divisions exist between components. Application of model checking to hardware verification simple data structures are used systems are modular mostly finitestate systems system components have well defined interfaces mostly synchronous execution 8 application of model checking to software verification complex data structures are used procedural or oo design. Stoller, model checking multithreaded distributed java programs, proceedings of the 7th international spin workshop on spin model checking and software verification, p. Ieee transactions on software engineering, issn 00985589, eissn 19393520, ieee transactions on software engineering, vol. Modp is transforming the way asynchronous software is built at microsoft and amazon web services aws.

Modular software design, for example, refers to a design strategy in which a system is composed of relatively small and autonomous routines that fit together. Jan 07, 2020 we build a complex distributed systems software stack using modp. Modular software model checking for distributed systems watcharin leungwattanakit, cyrille artho, masami hagiya, yoshinori tanabe, mitsuharu yamamoto, and koichi takahashi abstractdistributed systems are complex, being usually composed of several subsystems running in parallel. A modular framework for modeling hardware elements in. The promise of model checking technology for finding defects due to unanticipated interleavings in highly concurrent systems has led a number of international corporations and government research labs such as microsoft, ibm, lucent, nec, nasa, and jet propulsion laboratories jpl to fund their own software model checking projects. We found no studies that analyzed the schedulability of distributed avionics systems as a whole including the network by model checking. We expect that our assumeguarantee model checking approach is applicable to other modular structured faulttolerant agreement protocols for asynchronous distributed systems. This paper presents pipal, a system for modular glass box software model checking, to further improve the scalability of glass box software model checking. Transparent model checking of unmodified distributed. As such they require a formal semantics on which the analysis process is build up. Modular software model checking for distributed systems by watcharin leungwattanakit, cyrille artho, masami hagiya, yoshinori tanabe, mitsuharu yamamoto and koichi takahashi abstract. Our interests and projects span scalable systems including hardware, networking, distributed systems, and programminglanguage technology, the internet. Revised lectures from the international symposium on compositionality. Various faulttolerant agreement protocols for asynchronous distributed systems can be constructed in a modular way which is based on consensus and failure detectors.

To apply modelbased techniques the overall system model of the automation system is needed. Discovering architectural mismatch in distributed eventbased. Composition of modular models for verification of distributed. Proceedings of the 4th international conference on tools and algorithms for construction and analysis of systems, pages 2035, 1998. More complex forms of reasoning such as induction kurshan and mcmillan 1989 are also possible within this framework. Embedded systems that run on a single processor or on an integrated group of processors. Discovering architectural mismatch in distributed event. Modular model checking can one infer a global property from the local speci cations. Combining environment generation and slicing for modular. His work on the software model checker magic received the acm distinguished paper award for contribution to the study of verification of modular software. Modular software model checking for distributed systems watcharin leungwattanakit, cyrille artho, masami hagiya, yoshinori tanabe, mitsuharu yamamoto, and koichi takahashi abstractdistributed systems are complex, being usually composed of several.

Modular software upgrades for distributed systems springerlink. Oct 23, 20 modular software model checking for distributed systems abstract. Practical software model checking via dynamic interface. Modelbased verification is an established approach to test the behavior of the system under test, before going into operation. Migration from a centralized to a distributed modeling approach decomposing an engine model modeling of control system components creating a library of reusable modeling components establishing a template for modeling distributed systems working toward a hardwareintheloop hil system simulation benchmarking and. Modular programming is a software design technique that emphasizes separating the functionality of a program into independent, interchangeable modules, such that each contains everything necessary to execute only one aspect of the desired functionality a module interface expresses the elements that are provided and required by the module. Modular and safe eventdriven programming eecs at uc berkeley. This can be useful especially for software, as the software model.

Interaction model the behavior and state of distributed systems can be described by a distributed algorithm a definition of the steps to be taken by each of the processes, including the transmission of messages between them. Our results demonstrate that compositional reasoning can help scale modelchecking both explicit and symbolic to large distributed systems. Distributed systems where the system software runs on a loosely integrated group of cooperating processors linked by a network. Modular programming, in the form of subsystems particularly for io and software libraries, dates to early software systems, where it was used for code reuse. The term modular can apply to both hardware and software. Further extensions to this work have allowed for the model checking of event systems written in a special purpose language, iil zbcd06. This paper presents a modeling framework for schedulability analysis of distributed integrated modular avionics dima systems that consist of spatially distributed arinc653 modules connected by a unified afdx network.

The abstract components are then composed to form an abstract system to which a model checking. Yet while a system is upgrading, it must continue to provide service to users. We propose to employ modular techniques to the distributed model checking problem. Modelchecking aims at verifying that a software or hardware system meets its specification. One of the bene ts of restricting ourselves to lineartime logic as opposed to a more expressive logic such as ctl or the modal mucalculus is the ability to invoke the magic compositional. Finally, the efficiency of our method is evaluated through the experimental results obtained from using two model checking tools, spin and smv. The elements defined in the interface are detectable. Given a distributed system, each of its components is reduced by abstracting away from details that are irrelevant for the required specification. Any distance may separate computers in the network.

Efficient computeraided verification of parallel and. This leads to several orders of magnitude speedups 8 over previous model checking approaches. In order to enable the verification of discrete controllers for such hybrid systems, this contribution proposes an approach that combines decomposition, model checking and deduction. Modular software model checking for distributed systems abstract. In general, these modeling languages are designed to be suitable for applying model checking techniques and are not necessarily based on a software development paradigm. Model based verification is an established approach to test the behavior of the system under test, before going into operation. Modular abstractions for verifying realtime distributed. An example of a particularly challenging distributed system is multimaster, optimistic. It is not possible to upgrade all the nodes in a system at once, since some nodes may be unavailable and halting the system for an upgrade is unacceptable. Concurrent execution and interprocess communication in these systems are prone to errors that are difficult to detect by traditional testing, which does not cover every possible. Modular software model checking for distributed systems. Model checking a modularstructured nonblocking atomic. A distributed system is a system whose components are located on different networked computers, which communicate and coordinate their actions by passing messages to one another.

Actl developed for nitestate systems dilian gurov kth stockholm modular software veri cation december 2014 5 29. Abstraction for model checking modular interpreted systems over atl extended abstract, michael koster and peter lohmann, proc. Software model checking for distributed systems with selectorbased, nonblocking communication. The requirements may be expressed logically, with a deductive design process, or the requirements may come in. The increasing complexity of distributed automation systems requires new methods to verify the correct functionality. Distributed computing is a field of computer science that studies distributed systems. Our interests and projects span scalable systems including hardware, networking, distributed systems, and programminglanguage technology, the internet including the web, ecommerce, and information retrieval, and humancomputer interaction including userinterface technology, computerbased appliances, and mobile computing. To apply model based techniques the overall system model of the automation system is needed. However it is difficult to design correct faulttolerant distributed protocols especially for asynchronous systems. Modular software model checking for distributed systems core. Feb 24, 2014 wiki article on this topic starts with this sentence the word software architecture intuitively denotes the high level structures of a software system. More than 40 million people use github to discover, fork, and contribute to over 100 million projects. It achieves this transparency via a novel architecture.

Embedded systems distributed architectures raise other issues than limited shannon budget and costtocommunicate distributed control architectures cause artifacts that can be problematic for feedback control systems architectures such as ima and autosar aim at enabling modular development of systems in complex supplier chains. The abstract components are then composed to form an abstract system to which a model checking procedure is. In choosing a computational model, a logic and a preorder to obtain a. Our results demonstrate that compositional reasoning can help scale model checking both explicit and symbolic to large distributed systems. Model checking, automated abstraction, and compositional. Abstraction for model checking modular interpreted systems. Modular software model checking for distributed systems watcharin leungwattanakit, cyrille artho, masami hagiya, yoshinori tanabe, mitsuharu yamamoto, and koichi takahashi abstract distributed systems are complex, being usually composed of several subsystems running in parallel.

Home browse by title proceedings compos97 modular model checking. A modeling frameworkfor schedulability analysis of. The components interact with one another in order to achieve a common goal. Upgrading the software of longlived, highlyavailable distributed systems is difficult. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Integrated software systems are software packages that combines many applications in one program, in the effective running of the accountancy profession accountants needed a utility program to load data from one program to another, this became very complicated especially where there are huge work volumes therefore necessitating integration of two or more modules that interact and as a result. The requirements may be expressed logically, with a deductive design process, or the requirements may come in the form of datasets, with an inductive design process. Citeseerx internship proposal distributed modelchecking. Srcs charter is to advance the state of the art in computer systems by doing basic and applied research in support of our companys business objectives.

Modular software model checking for distributed systems article pdf available in ieee transactions on software engineering 405. Unit 1 architecture of distributed systems 1 architecture of distributed systemsintroductiona distributed system ds is one in which hardware and software components, located at remote networked computers, coordinate and communicate their actions only by passing messages. We build a complex distributed systems software stack using modp. By watcharin leungwattanakit, cyrille artho, masami hagiya, yoshinori tanabe, mitsuharu yamamoto and koichi takahashi. Modp is transforming the way asynchronous software is built at. We model a dima system as a set of stopwatch automata swa in uppaal to analyze its schedulability by classical model checking mc and statistical model checking smc. Models and software model checking of a distributed file. Stoller, modelchecking multithreaded distributed java programs, proceedings of the 7th international spin workshop on spin model checking and software verification, p. Messages are transmitted to transfer information between processes and to coordinate their activity. Personal systems that are not distributed and that are designed to run on a personal computer or workstation. A modeling framework for schedulability analysis of. On modular architectures on software architecture medium. Wiki article on this topic starts with this sentence the word software architecture intuitively denotes the high level structures of a software system. Modular abstractions for verifying realtime distributed systems.