KeY 2
KeY 2.6.3 is the latest stable release, released on October 11th, 2017.
The versions KeY 2.6.x accompany the second KeY Book.
For major new features (like state merging etc.), please checkout the nightly build.
KeY 2 differs significantly from the previous KeY 1.6 release.
The last KeY 1.6 release is KeY 1.6.5 (released
on April 18, 2013) and only provided for legacy reasons.
KeY Hoare has its own dedicated download page.
In case of questions about KeY please contact: support@key-project.org.
Download or Start
KeY requires Java version 7 or newer and is tested on Linux, OS X and Microsoft Windows.- Instant Start: Web Start
- Binary Version: KeY-2.6.3.zip
- Source Code: KeY-2.6.3-src.tgz
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
Detailed information about the provided Eclipse extensions can be found here. To install KeY 2.6.3 for Eclipse 4.7 Oxygen (other 4.x versions (Luna/Mars/Neon) should work as well)| Update Site Name: | KeY Eclipse Extensions |
|---|---|
| Update Site URL: | https://formal.iti.kit.edu/key/download/releases/2.6/eclipse/ |
Known issues
If no items are shown in the “Install” wizard, please deselect the checkbox “Group items by category”.Unstable Development Versions (Nightly Builds)
You can download current snapshot of the KeY development.
Webstart (Nighlty Build)
Have a look at the section Webstart Problems
if you have trouble starting KeY via Webstart
fatJar distribution
Just downdload and start with
java -jar key*-exe.jar
Source and binary artefacts
Classical KeY distribution with single jar of components, sources and javadoc.
java-1.8.0-openjdk-openjfx.
No support is provided for development versions.
Webstart Problems
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 runningjavaws -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 http://i12www.ira.uka.de/.
Import the KeY certificate
Download the file “KEY.cer” which contains our certificate. Open the Java Control Panel via runningjavaws -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.
Known Problems & Workarounds
Strings “don’t work” in projects with auto-generated stubs
Problem description
When using the (otherwise very practical!) feature of the KeY eclipse plugin which automatically generates stubs (empty methods with default specifications) for included library methods, it might happen that symbolic execution of Java programs gets stuck at a place likestr = "foo";, where str is a variable of type String.