Starting copter simulator (SITL)
Downloading SITL from http://dronekit-assets.s3.amazonaws.com/sitl/copter/sitl-linux-copter-3.3.tar.gz
Download Complete.
Payload Extracted.
Ready to boot.
Traceback (most recent call last):
  File "vehicle_state.py", line 31, in <module>
    sitl = dronekit_sitl.start_default()
  File "/usr/local/lib/python2.7/dist-packages/dronekit_sitl/__init__.py", line 462, in start_default
    sitl.launch(sitl_args, await_ready=True, restart=True)
  File "/usr/local/lib/python2.7/dist-packages/dronekit_sitl/__init__.py", line 251, in launch
    caps = ArdupilotCapabilities(self.path)
  File "/usr/local/lib/python2.7/dist-packages/dronekit_sitl/__init__.py", line 160, in __init__
    process = subprocess.Popen([path, '--help'], stdout=subprocess.PIPE)
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception
OSError: [Errno 8] Exec format error