Mac Os 10.13 logs me out randomly | Help reading logs - macos

Question

Apparently out of the blue, I have started to experience random crashes on my Mac Pro 4.1, flashed to 5.1. It's running High Sierra 10.13.6 (17G9016), with 48Gb of Ram and two cards (one GT120 and a flashed MacVidCard Titan X Pascal). It is a soft crash in the sense that it just logs me out of my session and then I need to log in again, so it doesn't completely reboot.
However it's very annoying since I can't finish any task properly and need to reopen all the files I might be working with, which generally deal with heavy graphics (CAD applications or video editing).
I am not fluent in reading crash logs, so any help reading this one is much appreciated.
Here's the last crash log:
Process: WindowServer [144]
Path: /System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/Resources/WindowServer
Identifier: WindowServer
Version: 600.00 (312.103.11)
Code Type: X86-64 (Native)
Parent Process: launchd [1]
Responsible: WindowServer [144]
User ID: 88
Date/Time: 2019-11-17 18:15:12.313 +0000
OS Version: Mac OS X 10.13.6 (17G9016)
Report Version: 12
Anonymous UUID: B4B1B7C1-08E2-6A09-6684-E949A6C2D95F
Time Awake Since Boot: 230 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000016
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [0]
VM Regions Near 0x16:
-->
__TEXT 0000000108ebe000-0000000108ebf000 [ 4K] r-x/rwx SM=COW [/System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/Resources/WindowServer]
Application Specific Information:
StartTime:2019-11-17 18:11:36
GPU:NV
MetalDevice for accelerator(0x4507): 0x7fb86ae03ef8 (MTLDevice: 0x7fb86c004800)
MetalDevice for accelerator(0x4e07): 0x7fb86d00d858 (MTLDevice: 0x7fb86c004800)
IOService:/AppleACPIPlatformExpert/PCI0#0/AppleACPIPCI/IOU0#3/IOPP/PXS1#0/NVDA,Display-B#1/NVDA
IOService:/AppleACPIPlatformExpert/PCI0#0/AppleACPIPCI/IOU1#7/IOPP/PXS2#0/NVDA,Display-A#0/NVDATesla
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libGPUSupport.dylib 0x00007fff6606b10c gpumRestoreTextureData + 60
1 libGFXShared.dylib 0x00007fff56f366d9 gfxUploadPluginTextureLevel + 111
2 GLEngine 0x00007fff57bf55e7 gleSynchronizePluginTextureLevels + 279
3 GLEngine 0x00007fff57bbfaaf gleBindFramebuffer + 321
4 GLEngine 0x00007fff57b0855c glBindFramebuffer_Exec + 142
5 com.apple.SkyLight 0x00007fff6f32ec24 CaptureSurfaceGL::CreateAndAttachTextureToFBO() + 162
6 com.apple.SkyLight 0x00007fff6f32e3d8 CaptureSurfaceGL::PrepareForPopulation(CGRect, WSPixelFormat, float, bool, CGColorSpace*, CGXDisplayDevice*, unsigned int) + 74
7 com.apple.SkyLight 0x00007fff6f444601 WSCALayerBackingUpdateFlatteningIfNeeded + 1284
8 com.apple.SkyLight 0x00007fff6f3cd2b3 CGXNextSurface + 3246
9 com.apple.SkyLight 0x00007fff6f472211 generate_layers_for_window_surfaces(CGXRedrawState*, CGXWindow*, CGSOrderOp, unsigned int, int*, WSCompositeSourceLayer**, CGSRegionObject*) + 5581
10 com.apple.SkyLight 0x00007fff6f46cca6 generate_layers_for_window(CGXRedrawState*, CGXWindow*) + 3193
11 com.apple.SkyLight 0x00007fff6f46afc1 CGXUpdateDisplay + 13505
12 com.apple.SkyLight 0x00007fff6f467882 update_display_callback(void*, double) + 257
13 com.apple.SkyLight 0x00007fff6f4ae552 run_timer_pass + 495
14 com.apple.SkyLight 0x00007fff6f4dc1c9 CGXRunOneServicesPass + 247
15 com.apple.SkyLight 0x00007fff6f4dcd84 SLXServer + 832
16 WindowServer 0x0000000108ebedde 0x108ebe000 + 3550
17 libdyld.dylib 0x00007fff75559015 start + 1
Thread 1:
0 libsystem_kernel.dylib 0x00007fff756aa28a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff75871009 _pthread_wqthread + 1035
2 libsystem_pthread.dylib 0x00007fff75870be9 start_wqthread + 13
Thread 2:
0 libsystem_kernel.dylib 0x00007fff756a020a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff7569f724 mach_msg + 60
2 com.apple.CoreDisplay 0x00007fff4d4cb685 0x7fff4d41c000 + 718469
3 com.apple.CoreDisplay 0x00007fff4d4cb813 0x7fff4d41c000 + 718867
4 libsystem_pthread.dylib 0x00007fff75871661 _pthread_body + 340
5 libsystem_pthread.dylib 0x00007fff7587150d _pthread_start + 377
6 libsystem_pthread.dylib 0x00007fff75870bf9 thread_start + 13
Thread 3:: com.apple.coreanimation.render-server
0 libsystem_kernel.dylib 0x00007fff756a020a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff7569f724 mach_msg + 60
2 com.apple.QuartzCore 0x00007fff5890ae62 CA::Render::Server::server_thread(void*) + 870
3 com.apple.QuartzCore 0x00007fff5890aae6 thread_fun + 25
4 libsystem_pthread.dylib 0x00007fff75871661 _pthread_body + 340
5 libsystem_pthread.dylib 0x00007fff7587150d _pthread_start + 377
6 libsystem_pthread.dylib 0x00007fff75870bf9 thread_start + 13
Thread 4:
0 libsystem_kernel.dylib 0x00007fff756aa28a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff75871009 _pthread_wqthread + 1035
2 libsystem_pthread.dylib 0x00007fff75870be9 start_wqthread + 13
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x00007fb871800000 rbx: 0x00007fb86c0e8800 rcx: 0x0000000000000000 rdx: 0x0000000000000000
rdi: 0x00007fb86f832a00 rsi: 0x00007fb86c0e8800 rbp: 0x00007ffee6d40380 rsp: 0x00007ffee6d40320
r8: 0x0000000000000000 r9: 0x000000016f236ee7 r10: 0x0000000000000003 r11: 0x0000000000000206
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x00007fb86f832a00
rip: 0x00007fff6606b10c rfl: 0x0000000000010246 cr2: 0x0000000000000016
Logical CPU: 4
Error Code: 0x00000004
Trap Number: 14
Binary Images:
[…]
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 3
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 318
thread_create: 0
thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=380.3M resident=0K(0%) swapped_out_or_unallocated=380.3M(100%)
Writable regions: Total=1.6G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=1.6G(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
Activity Tracing 256K 2
CG backing stores 173.6M 139
CG framebuffers 1.0G 9
CG framebuffers (reserved) 56.1M 9 reserved VM address space (unallocated)
CG image 668K 9
CoreAnimation 64.1M 53
CoreGraphics 4K 2
Dispatch continuations 32.0M 2
Kernel Alloc Once 8K 2
MALLOC 321.3M 146
MALLOC guard page 48K 13
MALLOC_LARGE (reserved) 160K 2 reserved VM address space (unallocated)
OpenGL GLSL 256K 4
STACK GUARD 56.0M 6
Stack 10.0M 6
VM_ALLOCATE 1352K 50
__CGSERVER 4K 2
__DATA 51.1M 249
__FONT_DATA 4K 2
__GLSLBUILTINS 2588K 2
__LINKEDIT 194.5M 10
__SLSERVER 4K 2
__TEXT 185.8M 250
__UNICODE 560K 2
mapped file 25.8M 3
shared memory 180K 15
=========== ======= =======
TOTAL 2.1G 965
TOTAL, minus reserved VM space 2.1G 965