Add extra control flow ERROR_IF tests

Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Change-Id: I7276dc686d8d18ba44663b73e35ceca2a1cbaadf
diff --git a/verif/generator/tosa_utils.py b/verif/generator/tosa_utils.py
index d79ab3c..29ae898 100644
--- a/verif/generator/tosa_utils.py
+++ b/verif/generator/tosa_utils.py
@@ -142,6 +142,9 @@
                 DType.INT32,
                 DType.INT48,
             )
+    else:
+        # Assume all types but the input type are incorrect
+        incorrect_types = list(usableDTypes(excludes=(input_dtype,)))
     return rng.choice(a=incorrect_types)