1. Discrete time model for process meta language with fictitious-clockBoštjan Vlaovič, Aleksander Vreže, 2022, original scientific article Abstract: Industries like telecommunications, medical, automotive, military, avionics, and aerospace
use complex real-time systems. Specification and Description Language (SDL) is one of the leading
domain specific languages that is formally defined by international standards and well established in
describing such systems. To check system properties abstracted model of the system is prepared in
selected modeling language. We use Spin (Simple Promela Interpreter) model checker that is one of
the leading tools for verification of complex concurrent and reactive systems. This paper focuses on
modeling the SDL timer construct. It is one of the SDL constructs that is not easily modeled with
Promela, but is present in many SDL systems. After an overview of the related work we propose
a new Discrete Time Model for Promela (DTMP) that is seamlessly integrated in our framework
for modeling SDL systems and can be used with the mainstream version of the Spin tool. To the
best of our knowledge, this is not possible with the existing solutions. We describe how DTMP can
be used to model SDL systems that use timers. Experimental results demonstrate its applicability
to non-SDL systems with Fischer’s mutual exclusion protocol and the Parallel Acknowledgment
with Retransmission that were used in prior studies. We compare state-space requirements with
one of the existing solutions DT Promela and DT Spin. With that, virtues and shortcomings of this
high-level solution are exposed. We have shown that DTMP is effective when an extensive range of
timer expiration values are used, which is usually the case in real-life SDL systems.
Keywords: formal specifications, formal languages, discrete time, model checking, automated extraction, SDL, Promela, SpinRCP, Sdl2pml
Published in DKUM: 27.03.2025; Views: 0; Downloads: 2
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2. Modeling, simulation, and verification of a Bounded Retransmission Protocol using Spin model checker and SpinRCP integrated development environment : master's thesisPero Buden, 2022, master's thesis Abstract: Simple Promela Interpreter (Spin) is a model checker that uses Protocol Meta Language (PROMELA) to describe systems. Unfortunately, PROMELA does not support any time constructs, limiting the implementation of a Bounded Retransmission Protocol (BRP) in Spin's integrated development environment called Spin Rich Client Platform (SpinRCP). In the master's thesis, we model, simulate, and verify four versions of BRP. The first two versions are modeled without a timer, and with the others we show two different ways to simulate timers in PROMELA. The tests we run will show the time and space complexity of verifying each version depending on the size of the file sent and the number of retries to send each chunk.
Keywords: model checker, Bounded Retransmission Protocol, Spin, SpinRCP, timer
Published in DKUM: 20.10.2022; Views: 462; Downloads: 42
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3. Applying automated model extraction for simulation and verification of real-life SDL specification with spinBoštjan Vlaovič, Aleksander Vreže, Zmago Brezočnik, 2017, original scientific article Abstract: Formally defined Specification and Description Language (SDL) is used for the design and specification of complex safety-critical systems. Each change in the specification of the product should be immediately checked formally against the requirements’ specification. This paper presents semi-automated system abstraction, automated model extraction, simulation, and formal verification of real-life complex SDL specification. Sound algorithms implemented in our sdl2pml automated model extraction tool preserve all properties of the SDL system. Sdl2pml includes our model of discrete time, abstraction, and support for all relevant SDL functionality and constructs such as dynamic process creation, rational data types, and communication with more than one process instance. To the best of our knowledge, most of them are not supported by any other known approach. We use our SpinRCP tool for simulation and formal verification of the extracted model with the Spin model checker. We demonstrate the applicability of our approach on ISDN User adaptation protocol from SI3000 Softswitch. The extracted Promela model is the largest one ever processed by Spin. We have shown that Spin simulation and model checking can be applied successfully to such huge models.
Keywords: formal specifications, automated extraction, formal languages, simulation, formal verification, model cheking, SDL, Promela, SpinRCP, Sdl2pml
Published in DKUM: 03.08.2017; Views: 1402; Downloads: 435
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