Element = Lattice = Model = Element: V
Lattice: hcp
Model: EAM_Dynamo_Olsson_2009_V__MO_944449444863_001
Computed model cutoff of 4.544574559219212 Angstroms
Computed isolated atomic energy of -1e-07 eV for species V

==============================================================================
==============================================================================
 Starting optimization to find optimum lattice constant 'a' with c/a fixed to
 sqrt(8/3)
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = 1.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.7252557933330577, total energy = -20.689826805659937

Attempting to perform relaxation using initial lattice constant guess of a = 1.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.725255840807222, total energy = -20.689826805659916

Attempting to perform relaxation using initial lattice constant guess of a = 1.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 2.7252557950560004, total energy = -20.689826805659933

Attempting to perform relaxation using initial lattice constant guess of a = 1.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 2.7252558015286983, total energy = -20.689826805659923

Attempting to perform relaxation using initial lattice constant guess of a = 1.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.725255789607766, total energy = -20.689826805659912

Attempting to perform relaxation using initial lattice constant guess of a = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.725255793333055, total energy = -20.689826805659933

Attempting to perform relaxation using initial lattice constant guess of a = 1.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.7252558410167698, total energy = -20.68982680565991

Attempting to perform relaxation using initial lattice constant guess of a = 1.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.72525579854846, total energy = -20.68982680565992

Attempting to perform relaxation using initial lattice constant guess of a = 2.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.725255794078114, total energy = -20.689826805659926

Attempting to perform relaxation using initial lattice constant guess of a = 2.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.7252557905565498, total energy = -20.68982680565992

Attempting to perform relaxation using initial lattice constant guess of a = 2.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 2.7252558408072227, total energy = -20.689826805659912

Attempting to perform relaxation using initial lattice constant guess of a = 2.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.7252557786181564, total energy = -20.689826805659926

Attempting to perform relaxation using initial lattice constant guess of a = 2.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 34
         Function evaluations: 75
Results for this minimization:
  a = 2.7252557950560004, total energy = -20.689826805659937

Attempting to perform relaxation using initial lattice constant guess of a = 2.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 32
         Function evaluations: 69
Results for this minimization:
  a = 2.7252558410167693, total energy = -20.68982680565991

Attempting to perform relaxation using initial lattice constant guess of a = 2.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 32
         Function evaluations: 69
Results for this minimization:
  a = 2.7252557933330546, total energy = -20.689826805659933

Attempting to perform relaxation using initial lattice constant guess of a = 2.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 33
         Function evaluations: 69
Results for this minimization:
  a = 2.725255798781291, total energy = -20.68982680565993

Attempting to perform relaxation using initial lattice constant guess of a = 3.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.7252557968720788, total energy = -20.68982680565992

Attempting to perform relaxation using initial lattice constant guess of a = 3.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 2.7252557850442827, total energy = -20.689826805659923

Attempting to perform relaxation using initial lattice constant guess of a = 3.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 35
         Function evaluations: 77
Results for this minimization:
  a = 2.7252557933330532, total energy = -20.689826805659933

Attempting to perform relaxation using initial lattice constant guess of a = 3.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.725255792401731, total energy = -20.689826805659916

Attempting to perform relaxation using initial lattice constant guess of a = 3.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.7252558358013617, total energy = -20.689826805659912

Attempting to perform relaxation using initial lattice constant guess of a = 3.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 2.725255796441341, total energy = -20.689826805659916

Attempting to perform relaxation using initial lattice constant guess of a = 3.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.725255788769573, total energy = -20.689826805659912

Attempting to perform relaxation using initial lattice constant guess of a = 3.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.7252557909116115, total energy = -20.68982680565992

Attempting to perform relaxation using initial lattice constant guess of a = 4.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.7252557933330523, total energy = -20.689826805659923

Attempting to perform relaxation using initial lattice constant guess of a = 4.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.725255818944426, total energy = -20.689826805659916

Attempting to perform relaxation using initial lattice constant guess of a = 4.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.725255791842935, total energy = -20.689826805659905

Attempting to perform relaxation using initial lattice constant guess of a = 4.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.725255835801363, total energy = -20.6898268056599

Attempting to perform relaxation using initial lattice constant guess of a = 4.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.725255780667063, total energy = -20.689826805659905

Attempting to perform relaxation using initial lattice constant guess of a = 4.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -20.689827
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.7252557982341377, total energy = -20.68982680565992

==============================================================================
==============================================================================
 Starting optimization with both a and c/a relaxed
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 3.560259259855871 = ([1.30639453] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 3.7827754635968627 = ([1.38804419] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 4.005291667337854 = ([1.46969385] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 4.227807871078847 = ([1.5513435] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 4.450324074819838 = ([1.63299316] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 4.67284027856083 = ([1.71464282] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 4.895356482301821 = ([1.79629248] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 5.117872686042814 = ([1.87794214] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.72525579] Angstroms and c = 5.340388889783805 = ([1.95959179] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 4.625 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


==============================================================================
==============================================================================
 Finished with optimization
==============================================================================
==============================================================================

 Final lattice Constants:
   a = [2.72525579] Angstroms, c = [4.45032407] Angstroms, c/a = 1.632993

 Total energy: -20.689826805659937 eV

 Cohesive energy: -5.172456701414984 eV/atom

==============================================================================
==============================================================================