KeY 2.6.0 is the latest stable release, released on December 8th, 2016.
The version KeY 2.6.0 is identical to the version of the second KeY Book.
KeY Hoare has its own dedicated download page.
In case of questions about KeY please contact: firstname.lastname@example.org.
Download or Start
KeY requires Java version 7 or newer and is tested on Linux, OS X and Microsoft Windows.
Supported Java and JML Features
New Features in 2.x
- Explicit Heap Model and Dynamic Frames
- Verification of Recursive Methods
- Further Enhancend JML Support (Details)
- Simplified representation of integers
- GUI improvements (refreshed appearance, improved search, keyboard shortcuts)
- Counter Example Generation & Test Generation
- Calculus for Information Flow Reasoning
- Full support for shift-operations and partially for other binary operators
- Various bugfixes
KeY-Based Eclipse Projects
|Update Site Name:||KeY Eclipse Extensions|
|Update Site URL:||http://i12www.ira.uka.de/key/download/releases/2.6/eclipse/|
If no items are shown in the “Install” wizard, please deselect the checkbox “Group items by category”.
Unstable Development Versions (Nightly Builds)
No support is provided for development versions.
These issues are most likely only of concern if you are using webstart for the nighlty builds.
If you get an error dialog stating that the execution of the application was blocked due to your Java security settings, you have three options.
You can either
- download and run the binary versions using the links provided above,
- add the website
http://i12www.ira.uka.de/to the exception list of your Java installation, or
- import our certificate with which the Jar was signed.
Adding our website to the exception list
First, you have to start the Java Control Panel. This can be accomplished via running
javaws -viewer in a terminal. Two windows should open: The “Java Cache Viewer” (close this window) and the Java Control Panel. Click on the “Security” tab in the control panel and choose to edit the site list; then, click on “Add” and enter the URL
Import the KeY certificate
Download the file “KEY.cer” which contains our certificate. Open the Java Control Panel via running
javaws -viewer and close the cache viewer. Click on the “Security” tab and choose to manage certificates. Then, click on “import”, change the file filter to “All Files”, navigate to the directory where you stored the KEY.cer file, choose it and press OK.
If the two solutions outlined above should fail for you, please resort to downloading and using the compiled binary version.