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UPPAAL is an integrated tool environment for modeling, validation and verification of real-time systems modeled as networks of timed automata, extended with data types (bounded integers, arrays, etc.).

UPPAAL CORA is a branch of UPPAAL for Cost Optimal Reachability Analysis developed by the UPPAAL team as part of the VHS and AMETIST projects. Whereas UPPAAL supports model checking of timed automata, UPPAAL CORA uses an extension of timed automata called LPTA. LPTA allows you to annotate the model with the notion of cost. This can be the cost of delay in certain situations or the cost of particular actions. UPPAAL CORA then finds optimal paths matching goal conditions.

UPPAAL CORA has been used in a number of case studies. Some of these are described on the case study page of this site. If you come up with interesting uses, please contact us. We are interested in hearing what you do!

Like UPPAAL, UPPAAL CORA is free for non-profit use, e.g. for evaluation, research, and teaching purposes.

Latest News

Release of CORA 060910

10 September 2006

A new release of UPPAAL CORA is available from the download page.

Content Updates

10 September 2006

Since the initial creation of this web page, many of the features of UPPAAL CORA have been integrated into UPPAAL and made available with the release of UPPAAL 4.0. At the same time, many new features have been added to UPPAAL CORA. Over time the information on this web page has become inaccurate, however, today this has changed: All pages should now be up to date.


The modeling language of UPPAAL CORA is robust towards changes in the problem modeled. This means that your investment in modeling is not lost when the problem changes, since it is easy to adapt the existing model.


Although the technology is rather new, experimental and very different from techniques used in traditional operational research, UPPAAL CORA is competitive in a number of case studies.


The language of UPPAAL CORA is a superset of UPPAAL. Any valid UPPAAL model is also a valid UPPAAL CORA model. This makes it easy and convenient to reuse and adapt your existing models to UPPAAL CORA.


UPPAAL CORA is based on the latest internal development version of UPPAAL, containing the latest performance and language improvements. It is however an experimental tool and lacks many of the verification features of UPPAAL.