verif: Return fail code instead of success

util/sim/data_utils.py

@@ -227,13 +227,13 @@ def check_result(expected, actual, atol=None, rtol=None):
     if atol is not None and rtol is not None:
         raise ValueError('atol and rtol are mutually exclusive.')
     if atol is not None:
-        fail = np.allclose(expected, actual, atol=atol, equal_nan=False)
+        success = np.allclose(expected, actual, atol=atol, equal_nan=False)
         error = np.abs(expected - actual)
     elif rtol is not None:
-        fail = np.allclose(expected, actual, rtol=rtol, equal_nan=False)
+        success = np.allclose(expected, actual, rtol=rtol, equal_nan=False)
         scale = np.maximum(np.abs(expected), np.abs(actual))
         scale[scale == 0] = 1  # Avoid division by zero, use absolute tolerance instead
         error = np.abs(expected - actual) / scale
     else:
         raise ValueError('Either atol or rtol must be specified.')
-    return fail, error
+    return not success, error