Question

what happens if we travel faster than light

Answer 1

if you travel faster than light then  warping space would allow you to travel as if you were moving faster than light by changing the structure of the universe, at least temporarily. You would end up in a certain location much faster than if you travelled there the 'normal way,' kind of like a secret passage. Happily for relativity, you would STILL not actually be travelling faster than the speed of light in local space, so Einstein's 'speed limit' still holds.

Answer 2

This is never possible.
Nothing can ever travel faster than light.
This way first postulated by Einstein in his infamous Special theory of Relativity.
Later, it was proved just before he published his work on General Relativity in 1915.
This however he proved by the way of proving Spontaneity and Causality of any event in the universe and it's notice anywhere else In the universe.
I recommend you to read these.
The basic idea was that traveling faster than light would mean that information will never reach you!
This obviously violates fundamental laws of universal truth and obviously Uncertainty principle.
Hope this helps you !