I have been running Minecraft 1.11.2 for a while and everything works fine. But today it suddenly stops loading my terrain. It got stuck on "Building Terrain" forever. I tried to create a new world in single player mode. Same thing. So I uninstalled minecraft and deleted .minecraft folder. Download the latest 1.11.2 version and reinstall it several times. Still the same error.
Here is the output file when it gets stuck:

15:56:41 launcher Preparing to launch minecraft client for 1.11.2
15:56:41 launcher Checking installations.
15:56:41 launcher Minecraft client 1.11.2 is ready to start.
15:56:41 launcher Starting!
15:56:41 launcher Using default game log configuration client-1.7.xml (outputs XML)
15:56:42 bes Setting user: yellowducky2
15:56:43 beu Skipping bad option: lastServer:
15:56:43 bes LWJGL Version: 2.9.4
15:56:43 cae Reloading ResourceManager: Default
15:56:44 ccq Starting up SoundSystem...
15:56:44 ccq Initializing LWJGL OpenAL
15:56:44 ccq (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
15:56:44 ccq OpenAL initialized.
15:56:44 ccq Sound engine started

And here is the log file:
[15:56:42] [Client thread/INFO]: Setting user: yellowducky2
[15:56:43] [Client thread/WARN]: Skipping bad option: lastServer:
[15:56:43] [Client thread/INFO]: LWJGL Version: 2.9.4
[15:56:43] [Client thread/INFO]: Reloading ResourceManager: Default
[15:56:44] [Sound Library Loader/INFO]: Starting up SoundSystem...
[15:56:44] [Thread-5/INFO]: Initializing LWJGL OpenAL
[15:56:44] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[15:56:44] [Thread-5/INFO]: OpenAL initialized.
[15:56:44] [Sound Library Loader/INFO]: Sound engine started
[15:56:47] [Client thread/INFO]: Created: 1024x512 textures-atlas
[15:57:26] [Server thread/INFO]: Starting integrated minecraft server version 1.11.2
[15:57:26] [Server thread/INFO]: Generating keypair
[15:57:27] [Server thread/INFO]: Preparing start region for level 0
[15:57:28] [Server thread/INFO]: Preparing spawn area: 13%

Could you please help me?