We have finished collecting benchmarks for SYNTCOMP 2015. Joining the 569 benchmark instances from last year are more than 2000 new benchmark instances, including new and challenging instances of existing benchmarks and 6 completely new sets of benchmarks.
We are currently working hard on testing and categorizing the benchmarks, and coming up with a scheme for selecting benchmarks for the competition (with the goal to have a good distribution across benchmarks from different problem sets and of different difficulty).

For testing purposes, the preliminary set of new benchmarks is available in folder Benchmarks2015 of our Bitbucket repository. Note that some of the files still contain errors (like 2 instead of 1 outputs), and many of them are very hard and have not been solved by any of the tools from last year in our test runs.