MBP Retina Mid 2014, unexpected "restart/update/failure"

[_MrZ_]

Hello guys, it is the second time it happens to me that when I randomly restart my MBP, suddenly it fails to reboot saying that the installation of MacOS has failed and giving me an error page like the one I'm attaching.
I didn't really notice if this is happening after a restart for installing software updates or not, but is quite scary for me as is the first time my baby "fails" me.
I was wondering if it was the case to back up everything and format and reinstall an older OS as my machine maybe starts having some problem handling the new OS?
Any help would be much appreciated.

Please find attached the Installer Log.

 

[_Kiki_]

Can be a problem with integrated graphics/CPU

 

[Fishrrman]

What I would try...

Download the 10.13.6 combo updater from here:
https://support.apple.com/kb/DL1970?locale=en_US

Then, apply it against your existing OS install.
Yes, I realize you ALREADY HAVE 10.13.6.

But re-applying the update may "clean up" any problems there might be with what you have now.

Running it won't damage your personal data.