Dezyne 2.14.0 released as free software!

December 06, 2021

We are thrilled to announce Dezyne 2.14: Dezyne is now being released as free software (FLOSS); thank you! Of course, Verum will continue to sponsor development of Dezyne, as well as offer the commercial Dezyne-IDE integration.

This release introduces implicit interface illegals: Specifying illegal in an interface is now optional, similar to components.

Dezyne now also has implicit temporary variables: a single valued action or call can now be used in if and reply expressions.

A new command dzn graph can be used to generate simplified (filtered) state diagrams using --hide and --remove options.

In the verification and simulation traces, the beginning of a livelock error is now marked with <loop>.

The documentation has seen a major rewrite and is available here:

We will evaluate your reports and track them via the Gitlab dezyne-issues project, see our guide to writing helpful bug reports.

What's next?

Full blocking support and verification with system scope. Introducing a new keyword defer for asynchronous behavior and deprecation of async.


Looking beyond the next releases we will introduce implicit interface constraints. Hierarchical behaviors, module-specifications and data-interfaces. Support for Model Based Testing.

The Dezyne developers.

Here are the compressed sources and a GPG detached signature[*]:

Here are the MD5 and SHA1 checksums:
05ec3d262ff142e957a0b2d1eafed1d4 dezyne-2.14.0.tar.gz
56de95b39815e1605f0789661d97bf22f288796a dezyne-2.14.0.tar.gz

[*] Use a .sig file to verify that the corresponding file (without the .sig suffix) is intact. First, be sure to download both the .sig file and the corresponding tarball. Then, run a command like this:

gpg --verify dezyne-2.14.0.tar.gz.sig

If that command fails because you don't have the required public key, then run this command to import it:

gpg --keyserver --recv-keys 1A858392E331EAFDB8C27FFBF3C1A0D9C1D65273

and rerun the gpg --verify command.


Changes in 2.14.0 since 2.13.3

About Dezyne

Dezyne is a programming language and a set of tools to specify, validate, verify, simulate, document, and implement concurrent control software for embedded and cyber-physical systems.

The Dezyne language has formal semantics expressed in mCRL2 developed at the department of Mathematics and Computer Science of the Eindhoven University of Technology (TUE). Dezyne requires that every model is finite, deterministic and free of deadlocks, livelocks, and contract violations. This achieved by means of the language itself as well as builtin verification through model checking. This allows the construction of complex systems by assembling independently verified components.

Dezyne is free software, it is distributed under the terms of the GNU Affero General Public Licence version 3 or later.

About Verum

Verum, the organization behind the Dezyne language, is committed to continuing to invest in the language for the benefit of all its users. Verum assists its customers and partners in solving the software challenges of today and tomorrow, by offering expert consultancy on the application of the Dezyne language and the development and use of its tools, as well as on Verum's commercial tools like IDE support based on the LSP (Language Server Protocol), interactive integrated graphics, interactive simulation, (custom) code generation and (custom) runtime library support.