How to make the ROS_INFO output stable? There is no other printout anywhere but this.

edit

Minimum distance 4.191115

                                         Minimum distance 4.190969

                                                                   Minimum distance 4.188169

  Minimum distance 4.190690

      Minimum distance 4.190304

                                Minimum distance 4.190628

                                                          Minimum distance 4.189540

Console output when the output formatting breaks

process[twist_mux-11]: started with pid [8118]
process[spawn_husky_model-12]: started with pid [8142]
[ INFO] [1524064476.680043681]: [twist_marker_server] Initialized.
[WARN] [1524064476.925794, 0.000000]: DEPRECATION warning: --shutdown-timeout has no effect.
[ INFO] [1524064476.985947174]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1524064476.988022291]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...
libGL error: failed to create drawable
                                      [ INFO] [1524064478.110975520, 0.022000000]: waitForService: Service [/gazebo/set_physics_properties] is now available.
                                                                                                                                                             [ INFO] [1524064478.189070053, 0.072000000]: Physics dynamic reconfigure ready.
                                Warning [parser_urdf.cc:1232] multiple inconsistent <gravity> exists due to fixed joint reduction overwriting previous value [true] with [false].
                                                                                                                                                                                 [ INFO] [1524064479.110225758, 0.282000000]: Laser Plugin: Using the 'robotNamespace' param: '/'

The code snippet

void HuskyHighlevelController::subscriberCallback(const sensor_msgs::LaserScan::ConstPtr &msg){
    min_dist = msg->ranges[0];
    for (int i = 0; i < msg->ranges.size(); i++){
        float r = msg->ranges[i];
        if (r<min_dist){
            min_dist = r;
        }
    }
    ROS_INFO_STREAM("Minimum distance :" << min_dist);
}