go back in time looping continually at the point you first created the stone before it began becoming infinitely heavy make sure you hide from yourself so you dont see yourself and try to stop yourself in the past,arrive in the past to lift the stone at the precise moment you always make it, you have to move quicker than plank time though also careful not to get stuck in a recursive loop, you can avoid this by projecting some indeterministic chaos or randomness into the time your about to arrive in before you arrive there,this may disintegrate and fragment your mind so wear a helmet,if all else fails drill an infinite hole into the rock and pour infinite water into the holes then infinitely make it freeze in infinitely freezing weather, if that doesnt work fill infinite hole with water put a infinitely expanding stick in the hole that reacts to water and will infinitely break the rock, be sure to pack an an infinite entropy parka so you dont on a temporal level freeze in time two times or three times over.