I got this on all rigs with    ccminer-tpruvot-v2.2.5-x16s-cuda8.0 on raven coin. 10-50 sec of normal work and this error again.

[2018-04-04 21:47:04] NVML GPU monitoring enabled.
[2018-04-04 21:47:04] 5 miner threads started, using 'x16r' algorithm.
/root/xminer.sh: line 69: 21850 Illegal instruction $MINER_PATH $MINER_OPTIONS
Miner ended/crashed. Restarting miner in 10 seconds --------------
============ Starting Miner ===============
*** ccminer 2.2.5 for nVidia GPUs by tpruvot@github config.json Built with the nVidia CUDA Toolkit 8.0 64-bits
Originally based on Christian Buchner and Christian H. project
Include some kernels from alexis78, djm34, djEzo, tsiv and krnlx.
BTC donation address: 1AJdfCpLWPNoAMDfHF1wD5y8VgKSSTHxPo (tpruvot)
[2018-04-04 21:47:15] Starting on stratum tcp://stratum.threeeyed.info:3331
[2018-04-04 21:47:15] NVML GPU monitoring enabled.
[2018-04-04 21:47:15] 5 miner threads started, using 'x16r' algorithm.
/root/xminer.sh: line 69: 22063 Illegal instruction $MINER_PATH $MINER_OPTIONS
Miner ended/crashed. Restarting miner in 10 seconds --------------