At this point, most likely. Once you pack snow in with a plow you have a few hours to move it. Once it turns to ice it's going to stay there until spring short of using a backhoe.

This is why I try to be so diligent in clearing the ridge of packed snow left by the plows at the end of my driveway as soon as possible. The longer I wait the harder it is to move, and at a certain point it becomes a small glacier that isn't going anywhere without heavy equipment.