Runtime verification using Valour

In this paper we give an overview of Valour, a runtime verification tool which has been developed in the context of a project to act as a backend verification tool for financial transaction software. A Valour script is written by the user and is then compiled into a verification system. Although, developed as part of a project, the tool has been designed as a stand-alone general-purpose verification engine with a particular emphasis on event consumption. The strong points of Valour when compared to other runtime verification tools is its focus on scalability and robustness.peer-reviewe

Runtime verification of parametric properties using SMEDL

Parametric properties are typical properties to be checked in runtime verification (RV). As a common technique for parametric monitoring, trace slicing divides an execution trace into a set of sub traces which are checked against non-parametric base properties. An efficient trace slicing algorithm is implemented in MOP. Another RV technique, QEA further allows for nested use of universal and existential quantification over parameters. In this paper, we present a methodology for parametric monitoring using the RV framework SMEDL. Trace slicing algorithm in MOP can be expressed by execution of a set of SMEDL monitors. Moreover, the semantics of nested quantifiers is encoded by a hierarchy of monitors for aggregating verdicts of sub traces. Through case studies, we demonstrate that SMEDL provides a natural way to monitor parametric properties with more potentials for flexible deployment and optimizations

From Simulation to Runtime Verification and Back: Connecting Single-Run Verification Techniques

Modern safety-critical systems, such as aircraft and spacecraft, crucially depend on rigorous verification, from design time to runtime. Simulation is a highly-developed, time-honored design-time verification technique, whereas runtime verification is a much younger outgrowth from modern complex systems that both enable embedding analysis on-board and require mission-time verification, e.g., for flight certification. While the attributes of simulation are well-defined, the vocabulary of runtime verification is still being formed; both are active research areas needed to ensure safety and security. This invited paper explores the connections and differences between simulation and runtime verification and poses open research questions regarding how each might be used to advance past bottlenecks in the other. We unify their vocabulary, list their commonalities and contrasts, and examine how their artifacts may be connected to push the state of the art of what we can (safely) fly

A Taxonomy for Classifying Runtime Verification Tools

International audienceOver the last 15 years Runtime Verification (RV) has grown into a diverse and active field, which has stimulated the development of numerous theoretical frameworks and tools. Many of the tools are at first sight very different and challenging to compare. Yet, there are similarities. In this work, we classify RV tools within a high-level taxonomy of concepts. We first present this taxonomy and discuss the different dimensions. Then, we survey RV tools and classify them according to the taxonomy. This paper constitutes a snapshot of the current state of the art and enables a comparison of existing tools