Quickly fix grad experiment bugs in NNSmith artifact version.

nnsmith-fix-grad.patch

diff --git a/experiments/input_search.py b/experiments/input_search.py
index 3a2eec0..f82f55e 100644
--- a/experiments/input_search.py
+++ b/experiments/input_search.py
@@ -50,7 +50,7 @@ def mknets(args, exp_seed):
         os.makedirs(model_path)
     __DIFF_CACHE__ = 'config/diff.pkl'
     differentiable_ops = rewrite_op_dtype(
-        ALL_OP_TYPES, factory=None, diff=True, verbose=True, cache=__DIFF_CACHE__)
+        ALL_OP_TYPES, factory=None, diff=True, verbose=False, cache=__DIFF_CACHE__)
     print(differentiable_ops)
     results = {
         'model_seed': [],