Klever

We are happy to announce that Klever 2.0 is released!

Klever 2.0 implements ideas suggested in [1]. In general we added support for verification of software written in the GNU C programming language. First examples of using Klever for software that differs from Linux device drivers are verification of Linux kernel subsystems [2] and BusyBox applets. We are looking forward for more success stories!

Most important changes in Klever 2.0 are the following:

• Klever does not build programs under verification anymore. Instead it takes as input build bases that should be prepared with Clade in advance. This considerably speed ups verification when verifying the same software within different verification jobs. Also, this provides a more natural way to integrate Klever within a standard development life cycle.
• The generator of program fragments (former verification objects) includes abstract means suitable for various software as well as means for particular kinds of programs that allow to avoid considerable efforts for configuring program decomposition.
• The environment models generator consists of a number sub-generators that take specifications in suitable specific formats. This allows to simplify development of such the specifications very much. Besides, we fixed many existing and developed new environment model specifications both for new kinds of interactions between Linux kernel and BusyBox components and for new versions of the Linux kernel.
• The Klever interface provides users with a extremely useful online editor that enables changing configuration and specification files directly within the interface.

As usual many minor improvements and bug fixes were included in Klever 2.0.

Klever 2.0 differs too much from previous versions of Klever. Therefore, we recommend to deploy it from scratch rather than to update existing deployments.

We would like to thank everybody who participated in development, testing and using of Klever!

References

1. Novikov E., Zakharov I. (2018) Towards Automated Static Verification of GNU C Programs. In: Petrenko A., Voronkov A. (eds) Perspectives of System Informatics. PSI 2017. Lecture Notes in Computer Science, vol 10742. Springer, Cham.
2. Novikov E., Zakharov I. (2018) Verification of Operating System Monolithic Kernels Without Extensions. In: Margaria T., Steffen B. (eds) Leveraging Applications of Formal Methods, Verification and Validation. Industrial Practice. ISoLA 2018. Lecture Notes in Computer Science, vol 11247. Springer, Cham.