Hi Alexey
As I told before, this issue is becoming more common, even with some tweaks. In my case it seems to be linked to an overclocked Nvidia GTX 1080 TI by MSI. The other one behaves normally. The processing is successful when the memory demand is slightly lower, for instance using High instead of UltraHigh (sometimes, if we are dealing with a big project, it also happens in "high"). If possible, it would be great to lower the VRam consumption, as you explained to be in the works for version 1.7.3. Even better would be a way to assign the percentage of processing to a certain GPU to lower the demand. If I had a way to lower the processing load to the most powerful GPU, the problem would be gone for certain. I've been paying attention and the problem occurs when this GPU has 3 consecutive peaks in maximum memory consumption. The syntax of the error varies but is very similar to the one posted by mamirkhani (only numbers vary)
Error: CL_BUILD_PROGRAM_FAILURE (-11) at line 627
Best Regards