Синтез установочных последовательностей для автоматов с временными ограничениями

State identification is the well-known problem in the theory of Finite State Machines (FSM) where homing sequences (HS) are used for the identification of a current FSM state, and this fact is widely used in the area of software and hardware testing and verification. For various kinds of FSMs, such as partial, complete, deterministic, non-deterministic, there exist sufficient and necessary conditions for the existence ofpreset and adaptive HS and algorithms for their derivation. Nowadays timed aspects become very important for hardware and software systems and for this reason classical FSMs are extended by clock variables. In this work, we address the problem of checking the existence and derivation of homing sequences for FSMs with timed guards and show that the length estimation for timed homing sequence coincides with that for untimed FSM. The investigation is based on the FSM abstraction of a Timed FSM, i.e. on a classical FSM which describes behavior of corresponding TFSM and inherits some of its properties. When solving state identification problems for timed FSMs, the existing FSM abstraction is properly optimized.Идентификация состояний является хорошо известной задачей теории конечных автоматов, и установочные последовательности, которые позволяют идентифицировать текущее состояние конечного автомата, широко используются в областях тестирования и верификации программного и аппаратного обеспечения. Для автоматов различных классов, полностью определенных и частичных, детерминированных и недетерминированных, установлены необходимые и достаточные условия существования безусловных и адаптивных установочных последовательностей и предложены алгоритмы их синтеза, если такая последовательность существует. В настоящее время при верификации и тестировании программного и аппаратного обеспечения необходимо учитывать временные аспекты, что приводит к расширению автоматных моделей временными переменными. В настоящей работе мы исследуем задачи проверки существования и синтеза безусловных и адаптивных установочных последовательностей для автоматов с временными ограничениями и показываем, что оценки на длину таких последовательностей совпадают с оценками для классических конечных автоматов. Предлагаемый подход основан на использовании конечно-автоматной абстракции временного автомата, то есть описании временного автомата соответствующим конечным автоматом, который сохраняет свойства временного автомата относительно установочных последовательностей

Model Checking and Model-Based Testing : Improving Their Feasibility by Lazy Techniques, Parallelization, and Other Optimizations

This thesis focuses on the lightweight formal method of model-based testing for checking safety properties, and derives a new and more feasible approach. For liveness properties, dynamic testing is impossible, so feasibility is increased by specializing on an important class of properties, livelock freedom, and deriving a more feasible model checking algorithm for it. All mentioned improvements are substantiated by experiments

Новые информационные технологии в исследовании сложных структур : материалы Тринадцатой международной конференции, 7-9 сентября 2020 г

Тринадцатая конференция с международным участием «Новые информационные технологии в исследовании сложных структур» была проведена в дистанционном формате с 7 по 9 сентября 2020 г. Материалы сборника ориентированы на использование специалистами в области информационных технологий в различных сферах человеческой деятельности, включая вычислительные и телекоммуникационные системы, образование, архитектуру и градостроительство, охрану природы, здравоохранение, разработку систем искусственного интеллекта, исследование дискретных и стохастических структур управления и связи

LIPIcs, Volume 261, ICALP 2023, Complete Volume

LIPIcs, Volume 261, ICALP 2023, Complete Volum

Using MapReduce Streaming for Distributed Life Simulation on the Cloud

Distributed software simulations are indispensable in the study of large-scale life models but often require the use of technically complex lower-level distributed computing frameworks, such as MPI. We propose to overcome the complexity challenge by applying the emerging MapReduce (MR) model to distributed life simulations and by running such simulations on the cloud. Technically, we design optimized MR streaming algorithms for discrete and continuous versions of Conway’s life according to a general MR streaming pattern. We chose life because it is simple enough as a testbed for MR’s applicability to a-life simulations and general enough to make our results applicable to various lattice-based a-life models. We implement and empirically evaluate our algorithms’ performance on Amazon’s Elastic MR cloud. Our experiments demonstrate that a single MR optimization technique called strip partitioning can reduce the execution time of continuous life simulations by 64%. To the best of our knowledge, we are the first to propose and evaluate MR streaming algorithms for lattice-based simulations. Our algorithms can serve as prototypes in the development of novel MR simulation algorithms for large-scale lattice-based a-life models.https://digitalcommons.chapman.edu/scs_books/1014/thumbnail.jp

A complex systems approach to education in Switzerland

The insights gained from the study of complex systems in biological, social, and engineered systems enables us not only to observe and understand, but also to actively design systems which will be capable of successfully coping with complex and dynamically changing situations. The methods and mindset required for this approach have been applied to educational systems with their diverse levels of scale and complexity. Based on the general case made by Yaneer Bar-Yam, this paper applies the complex systems approach to the educational system in Switzerland. It confirms that the complex systems approach is valid. Indeed, many recommendations made for the general case have already been implemented in the Swiss education system. To address existing problems and difficulties, further steps are recommended. This paper contributes to the further establishment complex systems approach by shedding light on an area which concerns us all, which is a frequent topic of discussion and dispute among politicians and the public, where billions of dollars have been spent without achieving the desired results, and where it is difficult to directly derive consequences from actions taken. The analysis of the education system's different levels, their complexity and scale will clarify how such a dynamic system should be approached, and how it can be guided towards the desired performance