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Just guessing here, but I've had better luck running 1.7.10 Minecraft with Java 7. You might want to try using an older Java version if you can.
 
From your log:
Mantle Environment: DO NOT REPORT THIS CRASH! Unsupported mods in environment: optifine

Remove optifine and try again, if you still have issues, post new log. (use https://paste.feed-the-beast.com to share logs instead of uploading)
 
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