Huh? “Speed of light is unattainable”? “Distance to travel would shrink to near zero”? Also, you seem to ignore, it’s Einstein’s THEORY of relativity.
Just stop you’re embarrassing yourself.
>Einstein’s THEORY of relativity.
Tested and confirmed at 99.999% of the speed of light at cyclotrons and in cosmic rays every day. You want me to elaborate, though I fear it would be useless?