[Termtools] BenchExec no longer available

Dear all,

I was just informed that the benchmarking framework that we used in the past (BenchExec) is no longer available on StarExec. Hence, we'll have to work with "runsolver" instead. If I remember correctly, we used runsolver at some point, but then we switched to BenchExec due to issues with the measurement of the runtime. If you remember any details / your tool was affected by these problems, please let me know.

Best Florian