VM starts every other time

failed, from fresh host boot

2018-09-05 20:33:59.347+0000: starting up libvirt version: 4.5.0, qemu version: 3.0.0, kernel: 4.18.5, hostname: ungoliant.lan
LC_ALL=C PATH=/run/libvirt/nix-emulators:/nix/store/mdm7f4mka3dqdkvj1nz8gckzzad1hqqq-iptables-1.6.2/bin:/nix/store/adv7z6p3ns738dbn47byd1ccfq14k958-iproute2-4.18.0/bin:/nix/store/0vpf80hbzhbbbx3cgb4i0ky8n7ad7fkg-pm-utils-1.4.1/bin:/nix/store/4mhqcm3laqr6qp8xwhi6144ddciqjv6a-numad-0.5/bin:/nix/store/qsvyz09nl9qcgkjqn1ljxzcjnynr1f2b-numactl-2.0.12/bin:/nix/store/0k60brnmbvzvg6qcqvr0nbr1k0smhykh-bridge-utils-1.5/bin:/nix/store/qsm949m8mhashzzyx4qi7r6kyqwv9kn6-dmidecode-3.1/bin:/nix/store/az90jpkq4r4h97pjlf1jyzdpa9hd1fcq-dnsmasq-2.79/bin:/nix/store/4ar5i4266i4q5ndsywm541g4rd37b60m-ebtables-2.0.10-4/bin:/nix/store/1743p67gikszmyyf6s1195lqahwygiql-qemu-3.0.0/bin:/nix/store/wm8va53fh5158ipi0ic9gir64hrvqv1z-coreutils-8.29/bin:/nix/store/g5dlpwd44kd75i71nwzii8w4bp4inxwk-findutils-4.6.0/bin:/nix/store/9f89z51na7w931aja8lqlmhqny9h16cj-gnugrep-3.1/bin:/nix/store/ny5p32137wfyzdm485xfdck21w1gyl3g-gnused-4.5/bin:/nix/store/dzn7zyf1dhxlvrbpgnyn7di58zvfblrq-systemd-239/bin:/nix/store/1743p67gikszmyyf6s1195lqahwygiql-qemu-3.0.0/sbin:/nix/store/wm8va53fh5158ipi0ic9gir64hrvqv1z-coreutils-8.29/sbin:/nix/store/g5dlpwd44kd75i71nwzii8w4bp4inxwk-findutils-4.6.0/sbin:/nix/store/9f89z51na7w931aja8lqlmhqny9h16cj-gnugrep-3.1/sbin:/nix/store/ny5p32137wfyzdm485xfdck21w1gyl3g-gnused-4.5/sbin:/nix/store/dzn7zyf1dhxlvrbpgnyn7di58zvfblrq-systemd-239/sbin QEMU_AUDIO_DRV=none /run/libvirt/nix-emulators/qemu-kvm -name guest=win10-nvme,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-win10-nvme/master-key.aes -machine pc-i440fx-2.11,accel=kvm,usb=off,vmport=off,dump-guest-core=off,mem-merge=off -cpu host,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_vendor_id=asdf,kvm=off -drive file=/run/libvirt/nix-ovmf/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on -drive file=/var/lib/libvirt/qemu/nvram/win10-nvme_VARS.fd,if=pflash,format=raw,unit=1 -m 16000 -realtime mlock=on -smp 8,sockets=1,cores=4,threads=2 -object iothread,id=iothread1 -object iothread,id=iothread2 -object iothread,id=iothread3 -object iothread,id=iothread4 -uuid 4501390f-373c-4e8d-bd5b-d117184df72d -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,fd=21,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=0 -boot menu=off,strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/media/evo/@vmfiles/virtio-win-0.1.149.iso,format=raw,if=none,id=drive-ide0-0-1,readonly=on -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=2 -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:21:cb:ab,bus=pci.0,addr=0x2 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0,bus=usb.0,port=1 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 -device vfio-pci,host=2e:00.0,id=hostdev0,bus=pci.0,addr=0x3 -device vfio-pci,host=2e:00.1,id=hostdev1,bus=pci.0,addr=0x8 -device vfio-pci,host=2c:00.0,id=hostdev2,bootindex=1,bus=pci.0,addr=0x9 -device usb-host,hostbus=1,hostaddr=3,id=hostdev3,bus=usb.0,port=4 -device vfio-pci,host=27:00.0,id=hostdev4,bus=pci.0,addr=0xa -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -object input-linux,id=mouse1,evdev=/dev/input/by-id/usb-Microsoft_Microsoft®_2.4GHz_Transceiver_v9.0-if01-event-mouse -object input-linux,id=kbd1,evdev=/dev/input/by-id/usb-Microsoft_Microsoft®_2.4GHz_Transceiver_v9.0-event-kbd,grab_all=on,repeat=on -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny -msg timestamp=on
2018-09-05 20:33:59.347+0000: Domain id=1 is tainted: high-privileges
2018-09-05 20:33:59.347+0000: Domain id=1 is tainted: custom-argv
2018-09-05 20:33:59.347+0000: Domain id=1 is tainted: host-cpu
2018-09-05T20:33:59.393706Z qemu-system-x86_64: -chardev pty,id=charserial0: char device redirected to /dev/pts/1 (label charserial0)
2018-09-05T20:33:59.397396Z qemu-system-x86_64: This family of AMD CPU doesn't support hyperthreading(2). Please configure -smp options properly or try enabling topoext feature.
2018-09-05T20:34:13.956609Z qemu-system-x86_64: terminating on signal 15 from pid 1253 (/nix/store/mywf84a15qf0341lz59psq1ssysv28f5-libvirt-4.5.0/sbin/libvirtd)

successful, after failure

2018-09-05 20:36:45.762+0000: starting up libvirt version: 4.5.0, qemu version: 3.0.0, kernel: 4.18.5, hostname: ungoliant.lan
LC_ALL=C PATH=/run/libvirt/nix-emulators:/nix/store/mdm7f4mka3dqdkvj1nz8gckzzad1hqqq-iptables-1.6.2/bin:/nix/store/adv7z6p3ns738dbn47byd1ccfq14k958-iproute2-4.18.0/bin:/nix/store/0vpf80hbzhbbbx3cgb4i0ky8n7ad7fkg-pm-utils-1.4.1/bin:/nix/store/4mhqcm3laqr6qp8xwhi6144ddciqjv6a-numad-0.5/bin:/nix/store/qsvyz09nl9qcgkjqn1ljxzcjnynr1f2b-numactl-2.0.12/bin:/nix/store/0k60brnmbvzvg6qcqvr0nbr1k0smhykh-bridge-utils-1.5/bin:/nix/store/qsm949m8mhashzzyx4qi7r6kyqwv9kn6-dmidecode-3.1/bin:/nix/store/az90jpkq4r4h97pjlf1jyzdpa9hd1fcq-dnsmasq-2.79/bin:/nix/store/4ar5i4266i4q5ndsywm541g4rd37b60m-ebtables-2.0.10-4/bin:/nix/store/1743p67gikszmyyf6s1195lqahwygiql-qemu-3.0.0/bin:/nix/store/wm8va53fh5158ipi0ic9gir64hrvqv1z-coreutils-8.29/bin:/nix/store/g5dlpwd44kd75i71nwzii8w4bp4inxwk-findutils-4.6.0/bin:/nix/store/9f89z51na7w931aja8lqlmhqny9h16cj-gnugrep-3.1/bin:/nix/store/ny5p32137wfyzdm485xfdck21w1gyl3g-gnused-4.5/bin:/nix/store/dzn7zyf1dhxlvrbpgnyn7di58zvfblrq-systemd-239/bin:/nix/store/1743p67gikszmyyf6s1195lqahwygiql-qemu-3.0.0/sbin:/nix/store/wm8va53fh5158ipi0ic9gir64hrvqv1z-coreutils-8.29/sbin:/nix/store/g5dlpwd44kd75i71nwzii8w4bp4inxwk-findutils-4.6.0/sbin:/nix/store/9f89z51na7w931aja8lqlmhqny9h16cj-gnugrep-3.1/sbin:/nix/store/ny5p32137wfyzdm485xfdck21w1gyl3g-gnused-4.5/sbin:/nix/store/dzn7zyf1dhxlvrbpgnyn7di58zvfblrq-systemd-239/sbin QEMU_AUDIO_DRV=none /run/libvirt/nix-emulators/qemu-kvm -name guest=win10-nvme,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-2-win10-nvme/master-key.aes -machine pc-i440fx-2.11,accel=kvm,usb=off,vmport=off,dump-guest-core=off,mem-merge=off -cpu host,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_vendor_id=asdf,kvm=off -drive file=/run/libvirt/nix-ovmf/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on -drive file=/var/lib/libvirt/qemu/nvram/win10-nvme_VARS.fd,if=pflash,format=raw,unit=1 -m 16000 -realtime mlock=on -smp 8,sockets=1,cores=4,threads=2 -object iothread,id=iothread1 -object iothread,id=iothread2 -object iothread,id=iothread3 -object iothread,id=iothread4 -uuid 4501390f-373c-4e8d-bd5b-d117184df72d -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,fd=21,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=0 -boot menu=off,strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/media/evo/@vmfiles/virtio-win-0.1.149.iso,format=raw,if=none,id=drive-ide0-0-1,readonly=on -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=2 -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:21:cb:ab,bus=pci.0,addr=0x2 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0,bus=usb.0,port=1 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 -device vfio-pci,host=2e:00.0,id=hostdev0,bus=pci.0,addr=0x3 -device vfio-pci,host=2e:00.1,id=hostdev1,bus=pci.0,addr=0x8 -device vfio-pci,host=2c:00.0,id=hostdev2,bootindex=1,bus=pci.0,addr=0x9 -device usb-host,hostbus=1,hostaddr=3,id=hostdev3,bus=usb.0,port=4 -device vfio-pci,host=27:00.0,id=hostdev4,bus=pci.0,addr=0xa -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -object input-linux,id=mouse1,evdev=/dev/input/by-id/usb-Microsoft_Microsoft®_2.4GHz_Transceiver_v9.0-if01-event-mouse -object input-linux,id=kbd1,evdev=/dev/input/by-id/usb-Microsoft_Microsoft®_2.4GHz_Transceiver_v9.0-event-kbd,grab_all=on,repeat=on -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny -msg timestamp=on
2018-09-05 20:36:45.762+0000: Domain id=2 is tainted: high-privileges
2018-09-05 20:36:45.762+0000: Domain id=2 is tainted: custom-argv
2018-09-05 20:36:45.762+0000: Domain id=2 is tainted: host-cpu
2018-09-05T20:36:45.801034Z qemu-system-x86_64: -chardev pty,id=charserial0: char device redirected to /dev/pts/1 (label charserial0)
2018-09-05T20:36:45.804987Z qemu-system-x86_64: This family of AMD CPU doesn't support hyperthreading(2). Please configure -smp options properly or try enabling topoext feature.
2018-09-05T20:37:13.812387Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
2018-09-05T20:37:13.812410Z qemu-system-x86_64: libusb_release_interface: -4 [NO_DEVICE]
libusb: error [_open_sysfs_attr] open /sys/bus/usb/devices/1-9/bConfigurationValue failed ret=-1 errno=2
libusb: error [udev_hotplug_event] ignoring udev action bind
2018-09-05T20:37:23.309316Z qemu-system-x86_64: warning: guest updated active QH