Updated start function to handle know issue in

 main repo sosy-lab#776

contrib/p4-benchmark.py

@@ -25,10 +25,19 @@ def __init__(self):
         BenchExec.__init__(self)
 
     def load_executor(self):
-        from p4.p4execution import P4Execution
+        from p4_files.p4execution import P4Execution
 
         return P4Execution()
 
+    def start(self, argv):
+        """
+        Make sure the test is not executed in container. Otherwise the application
+        wont be able to create new containers for the switches.
+        """
+        if not "--no-container" in argv:
+            argv.append("--no-container")
+        return super().start(argv)
+
 
 def main(benchexec=None, argv=None):
     """