Memory allocation error while using Thrust

#include <thrust/host_vector.h>
#include <thrust/device_vector.h>
#include <cuda.h>
#include <iostream>

int main(void)
{
  size_t free, total;

  cudaMemGetInfo (&free , &total);
  std::cout << "Free Memory                                    : " << free  << std::endl ;
  std::cout << "Total amount of memory                         : " << total <<std::endl;

    //Use Thrust to  initialize all ten integers of a device_vector to 1
    thrust::device_vector<int> D(10, 1);
    //Print out the device vector.
    for (int i = 0; i < D.size(); ++i)
     {
      std::cout << D[i] <<std::endl ;
     }



    return 0;
}