Optimization terminated successfully.
         Current function value: -3.360000
         Iterations: 17
         Function evaluations: 34
Writing phonon.eq.pckl
Writing phonon.0x-.pckl
Writing phonon.0x+.pckl
Writing phonon.0y-.pckl
Writing phonon.0y+.pckl
Writing phonon.0z-.pckl
Writing phonon.0z+.pckl
WARNING, 1 imaginary frequencies at q = ( 0.00,  0.00,  0.00) ; (omega_q = 5.837e-09*i)
WARNING, 1 imaginary frequencies at q = ( 0.00,  0.00,  0.00) ; (omega_q = 5.837e-09*i)