I am using PyTorch 1.4.0 and I am not sure about the segmentation use case thing, however, predicted results  the tensor tensor like this
([[[0, 0, 0,  …, 0, 0, 0],
[0, 0, 0,  …, 0, 0, 0],
[0, 0, 0,  …, 0, 0, 0],
…,
[0, 0, 0,  …, 0, 0, 0],
[0, 0, 0,  …, 0, 0, 0],
[0, 0, 0,  …, 0, 0, 0]],
correct_train = 7424540
total_train= 768000