## Jan Friso Groote: Real equation systems

The toolset heavily relies on boolean equation systems, which are the workhorse to solve modal formulas. Boolean equation systems only permit truth values as solutions for variables. It would be nice to also extract quantitative information using modal formulas, such as probabilities, durations, or yields. For this purpose it would be nice to have real *…continue reading*

## Allan van Hulst: Kernels and small quasi-kernels in directed graphs (guest speaker)

In this talk I would like to discuss recent developments on the subject of kernels and quasi-kernels in directed graphs. A kernel is an independent set K in a directed graph such that every vertex is reachable in at most one step from K. A quasi-kernel is a weakening of the concept of a kernel. *…continue reading*

## Milan Hutten: Sound and Complete Axiomatizations for the rooted variants of Divergence-Preserving, Weak Divergence-Preserving and Stability-Respecting Branching Bisimilarity

This thesis studies divergence and the extra complexity it adds to branching bisimilarity and axiomatizations with respect to branching bisimilarity. Aceto et al. provided sound and complete axiomatization with respect to rooted branching bisimilarity over basic CCS with the prefix iteration operator. Additionally, Spaninks, and Liu and Yu proposed sound and complete axiomatizations with respect *…continue reading*

## Anna Stramaglia: lpsparunfold: features and application

Concise process models in mCRL2 can be obtained by the use of data types such as lists and structured sorts. However, the addition of structure in the process parameters negatively affects static analysis tools such as constant elimination, parameter elimination and sum elimination which consider process parameters as single units in their analysis. To address *…continue reading*

## Nobuko Yoshida: mCRL2 for type-based verifications for distributed processes and programs

I first summarise how we used mCRL2 for checking properties of distributed processes and programs. I then talk about our most recent work which applies mCRL2 to unreliable systems, which we presented at CONCUR 2022.

## Floris Zeven: Spatial Model Checking with mCRL2

Image analysis using spatial model checking is a relatively recent approach that has promising applications in the medical field. We investigated whether it is possible to verify spatial proper- ties using the mCRL2 toolset, which was built to verify concurrent systems and protocols. This was achieved by translating Spatial Logic for Closure Spaces (SLCS) formulae *…continue reading*

## Anna Stramaglia: Semantics of UML State Machine Diagrams – overview and ambiguities

The Unified Modeling Language (UML), proposed by the Object Management Group (OMG), is a general purpose modeling language which became the standard for modeling system’ structure and behaviour. A UML model offers different views of the system in the form of various diagrams. The talk’s focus are UML State Machine Diagrams, widely used to specify *…continue reading*

## Thomas Neele: Compositional Learning of Synchronous Automata

The classical L* algorithm for learning DFAs runs in polynomial time with the size of the DFA being learnt. However, the DFA that represents a system consisting of multiple parallel components can grow exponentially in the number of components; known as the state space explosion problem. In this talk I will demonstrate how, given the *…continue reading*

## Erik de Vink: In search of for stability: cancelativity for probabilistic bisimulation

In an ongoing project on the complete axiomatization of branching probabilistic bisimulation, we are currently focusing on a cancellation property. We see a route of proving the property by means of topological arguments which seems a bit far-fetched. As a possible alternative approach we propose the notion of a stable process. A process is stable *…continue reading*

## Mark Bouwman: Verifying the EULYNX level crossing

Even though the behaviour of the EULYNX specification of the level crossing is conceptually quite simple, the state space associated to the mCRL2 model is enormous. This Thursday I will present the reasons for the state space explosion and the measures we took to drastically reduce it. Moreover, I will present the verification efforts, which *…continue reading*