Can't start turtlebot3 simulation

edit

I am using ROS Kinetic on Ubuntu 16.04(VirtualBox) with Gazebo 7.0. The turtlebot3 simulation with turtlebot3_empty_world.launch is not launching.

I am not able to upload a screenshot due to lack of the required 5 points and so I am pasting the log from my terminal

roslaunch turtlebot3_gazebo turtlebot3_empty_world.launch 
... logging to /home/daniel/.ros/log/d347cfe0-b298-11e7-9cb0-080027b84f82/roslaunch-daniel-VirtualBox-4286.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

xacro: Traditional processing is deprecated. Switch to --inorder processing!
To check for compatibility of your document, use option --check-order.
For more infos, see http://wiki.ros.org/xacro#Processing_Order
xacro.py is deprecated; please use xacro instead
started roslaunch server http://daniel-VirtualBox:33883/

SUMMARY
========

PARAMETERS
 * /robot_description: <?xml version="1....
 * /rosdistro: kinetic
 * /rosversion: 1.12.7
 * /use_sim_time: True

NODES
  /
    gazebo (gazebo_ros/gzserver)
    gazebo_gui (gazebo_ros/gzclient)
    spawn_urdf (gazebo_ros/spawn_model)

auto-starting new master
process[master]: started with pid [4300]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to d347cfe0-b298-11e7-9cb0-080027b84f82
process[rosout-1]: started with pid [4313]
started core service [/rosout]
process[gazebo-2]: started with pid [4320]
process[gazebo_gui-3]: started with pid [4340]
process[spawn_urdf-4]: started with pid [4347]
[ INFO] [1508175514.078153357]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1508175514.082199333]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...