/home/yurenh2/miniconda3/lib/python3.13/site-packages/torch/autograd/graph.py:865: UserWarning: Attempting to run cuBLAS, but there was no current CUDA context! Attempting to set the primary context... (Triggered internally at /pytorch/aten/src/ATen/cuda/CublasHandlePool.cpp:330.)
  return Variable._execution_engine.run_backward(  # Calls into the C++ engine to run the backward pass
(a) single-eval: rel=5.98e-07  (EXACT — gap is fp/FD noise)
(b) orig-vs-orig under 1e-6 state noise: rel=4.87e-01 cos=0.881368
HOLO_FAST_PROBE_DONE