diff --git a/learning/observationtable.py b/learning/observationtable.py
index 2fc9db604016c80c2cc05c83c7d9f2b0efa9bbaa..86df935842aec557ecfe51713212b94b924fc85c 100644
--- a/learning/observationtable.py
+++ b/learning/observationtable.py
@@ -290,7 +290,10 @@ class Table:
             # priority to hMinus suffixes
             return newSuffixes
         else:
-            return self._isNotReducible(chaos=True)
+            # If the table is complete, no need to check hPlus (hPlus == hMinus)
+            if self.getObservableTraces() != set():
+                return self._isNotReducible(chaos=True)
+            return set()
 
     def _isNotReducible(self, chaos=False):
         # function used for filtering rows, we want only those which
@@ -428,7 +431,11 @@ class Table:
             # priority to hMinus suffixes
             return newSuffixes
         else:
-            return self._isNotConsistent(chaos=True)
+            # If the table is complete, no need to check hPlus (hPlus == hMinus)
+            if self.getObservableTraces() != set():
+                return self._isNotConsistent(chaos=True)
+            return set()
+
 
     def _isNotConsistent(self, chaos=False):
         # get all combinations of rows in S, with repetitions for hPlus