Rooting -LG G3 (D851) Lollipop 5.0.1 Appears to work but doesn't.

Hello, I have an LG G3 (D851) Lollipop 5.0.1 And I have tried to root it with many different programs or manually band each times everything goes smoothly it says "Done" but the phone is not rooted ? What can I do ?

I have tried the following :

LG One Click Root (Visual)
LG One Click Root (Prompt)
PurpleDrake-Lite
LG Root Script v1.2
Kingroot
Newest root method V03
Towelroot

Here is what one click root says :

Starting adb server...
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
Waiting for device...
Device detected!
Pushing files...
4432 KB/s (1048328 bytes in 0.230s)
316 KB/s (9226 bytes in 0.028s)
4150 KB/s (4017098 bytes in 0.945s)
Rebooting...
Looking for LG serial port...
Phone found at COM4!
Rebooting into Download mode...
Waiting for device...
Phone found at COM4!
Rooting phone...
Author : blog.lvu.kr
SPECIAL COMMAND : ENTER, LEAVE
#
- Mounting /system, /data and rootfs
- Extracting files
- Disabling OTA survival
- Removing old files
- Placing files
- Post-installation script
- Unmounting /system and /data
#
Done!

They seem to work but then nothing happens on the phone, it's not rooted. Do you have any idea why ?

Thank you for your help.