Element = Lattice = Model = Element: O
Lattice: hcp
Model: Sim_LAMMPS_reaxFF_FthenakisPetsalakisTozzini_2022_CHON__SM_198543900691_000
Computed model cutoff of 9.99254635568708 Angstroms
Computed isolated atomic energy of -0.08713303931863443 eV for species O

==============================================================================
==============================================================================
 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))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.0 Angstroms
Exception message:
ERROR on proc 0: Neighbor list overflow, boost neigh_modify one (src/npair_half_bin_newtoff_ghost.c
Continuing...


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

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.125 Angstroms
Exception message:
ERROR on proc 0: Neighbor list overflow, boost neigh_modify one (src/npair_half_bin_newtoff_ghost.c
Continuing...


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

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.25 Angstroms
Exception message:
ERROR on proc 0: Neighbor list overflow, boost neigh_modify one (src/npair_half_bin_newtoff_ghost.c
Continuing...


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

Results for this minimization:
  a = 2.071544297095538, total energy = 0.5304387212862236

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: 0.530439
         Iterations: 58
         Function evaluations: 123
Results for this minimization:
  a = 2.0715442971442832, total energy = 0.5304387213547883

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: 0.645882
         Iterations: 47
         Function evaluations: 112
Results for this minimization:
  a = 2.0920839786529553, total energy = 0.645881948585719

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: 0.645882
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 2.0920843090862036, total energy = 0.6458819486413958

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: 0.530439
         Iterations: 62
         Function evaluations: 134
Results for this minimization:
  a = 2.071544297124092, total energy = 0.5304387219489171

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: 0.645882
         Iterations: 34
         Function evaluations: 76
Results for this minimization:
  a = 2.092084026546218, total energy = 0.6458819484986416

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: 0.645882
         Iterations: 36
         Function evaluations: 84
Results for this minimization:
  a = 2.092083835601807, total energy = 0.6458819485317959

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: 0.645882
         Iterations: 36
         Function evaluations: 80
Results for this minimization:
  a = 2.092084119468927, total energy = 0.6458819485830911

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: -0.073818
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 3.807075107982378, total energy = -0.0738178566129073

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: -0.073818
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 3.8070751423947513, total energy = -0.0738178566129079

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: -0.073818
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 3.807075119507502, total energy = -0.07381785661290763

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: -0.073818
         Iterations: 36
         Function evaluations: 80
Results for this minimization:
  a = 3.8070750556886237, total energy = -0.0738178566129078

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: -0.073818
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 3.8070751495659354, total energy = -0.07381785661290946

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: -0.073818
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 3.807075047492983, total energy = -0.07381785661290702

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: -0.073818
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 3.8070751656778157, total energy = -0.0738178566129079

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: -0.073818
         Iterations: 34
         Function evaluations: 76
Results for this minimization:
  a = 3.8070751495659363, total energy = -0.07381785661290946

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: -0.073818
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 3.8070751431689143, total energy = -0.07381785661290852

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: -0.073818
         Iterations: 34
         Function evaluations: 75
Results for this minimization:
  a = 3.807075139880181, total energy = -0.0738178566129093

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: -0.073818
         Iterations: 32
         Function evaluations: 73
Results for this minimization:
  a = 3.807075116038323, total energy = -0.07381785661290663

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: -0.073818
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 3.8070751758059487, total energy = -0.07381785661290824

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: -0.073818
         Iterations: 32
         Function evaluations: 71
Results for this minimization:
  a = 3.807075268030166, total energy = -0.07381785661290668

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: -0.073818
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 3.807075071334839, total energy = -0.07381785661290852

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: -0.073818
         Iterations: 34
         Function evaluations: 75
Results for this minimization:
  a = 3.8070750474929813, total energy = -0.07381785661290702

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: -0.073818
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 3.8070751410909, total energy = -0.0738178566129093

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: -0.073818
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.8070751763880253, total energy = -0.07381785661290807

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: -0.073818
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 3.807075144164263, total energy = -0.07381785661290946

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: -0.073818
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 3.807075055874883, total energy = -0.07381785661290685

Attempting to perform relaxation using initial lattice constant guess of a = 4.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.8070751079823824, total energy = -0.07381785661290702

Attempting to perform relaxation using initial lattice constant guess of a = 4.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 3.80707521282602, total energy = -0.07381785661290513

Attempting to perform relaxation using initial lattice constant guess of a = 5.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 36
         Function evaluations: 80
Results for this minimization:
  a = 3.8070751423947513, total energy = -0.0738178566129079

Attempting to perform relaxation using initial lattice constant guess of a = 5.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 3.807075107024864, total energy = -0.07381785661290763

Attempting to perform relaxation using initial lattice constant guess of a = 5.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.8070751195074983, total energy = -0.07381785661290763

Attempting to perform relaxation using initial lattice constant guess of a = 5.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.8070751265622684, total energy = -0.07381785661290885

Attempting to perform relaxation using initial lattice constant guess of a = 5.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.807075031101702, total energy = -0.07381785661290702

Attempting to perform relaxation using initial lattice constant guess of a = 5.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 3.807075168209849, total energy = -0.07381785661290918

Attempting to perform relaxation using initial lattice constant guess of a = 5.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.807075149565932, total energy = -0.07381785661290946

Attempting to perform relaxation using initial lattice constant guess of a = 5.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 3.807075018907198, total energy = -0.07381785661290646

Attempting to perform relaxation using initial lattice constant guess of a = 6.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 3.807075047492976, total energy = -0.0738178566129068

Attempting to perform relaxation using initial lattice constant guess of a = 6.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.8070751608844127, total energy = -0.07381785661290802

Attempting to perform relaxation using initial lattice constant guess of a = 6.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.8070751656778157, total energy = -0.0738178566129079

Attempting to perform relaxation using initial lattice constant guess of a = 6.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.8070751554143487, total energy = -0.0738178566129079

Attempting to perform relaxation using initial lattice constant guess of a = 6.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.807075070869174, total energy = -0.07381785661290807

Attempting to perform relaxation using initial lattice constant guess of a = 6.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.807075090908614, total energy = -0.07381785661290718

Attempting to perform relaxation using initial lattice constant guess of a = 6.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.80707514316891, total energy = -0.07381785661290852

Attempting to perform relaxation using initial lattice constant guess of a = 6.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.8070750311017036, total energy = -0.07381785661290702

Attempting to perform relaxation using initial lattice constant guess of a = 7.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 3.8070751398801788, total energy = -0.07381785661290885

Attempting to perform relaxation using initial lattice constant guess of a = 7.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.807075147796417, total energy = -0.07381785661290885

Attempting to perform relaxation using initial lattice constant guess of a = 7.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 3.807075142202659, total energy = -0.0738178566129079

Attempting to perform relaxation using initial lattice constant guess of a = 7.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.80707515138201, total energy = -0.07381785661290702

Attempting to perform relaxation using initial lattice constant guess of a = 7.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.807075150660239, total energy = -0.07381785661290641

Attempting to perform relaxation using initial lattice constant guess of a = 7.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.807075148625885, total energy = -0.0738178566129073

Attempting to perform relaxation using initial lattice constant guess of a = 7.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.807075268030155, total energy = -0.07381785661290668

Attempting to perform relaxation using initial lattice constant guess of a = 7.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.8070750647457254, total energy = -0.07381785661290946

Attempting to perform relaxation using initial lattice constant guess of a = 8.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.8070750713348356, total energy = -0.07381785661290885

Attempting to perform relaxation using initial lattice constant guess of a = 8.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.807075048054685, total energy = -0.0738178566129069

Attempting to perform relaxation using initial lattice constant guess of a = 8.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 39
         Function evaluations: 86
Results for this minimization:
  a = 3.807075047492985, total energy = -0.0738178566129069

Attempting to perform relaxation using initial lattice constant guess of a = 8.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 3.8070752340368808, total energy = -0.07381785661290641

Attempting to perform relaxation using initial lattice constant guess of a = 8.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 3.807075133174651, total energy = -0.07381785661290763

Attempting to perform relaxation using initial lattice constant guess of a = 8.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 3.8070752223953575, total energy = -0.0738178566129063

Attempting to perform relaxation using initial lattice constant guess of a = 8.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 3.8070751763880253, total energy = -0.07381785661290818

Attempting to perform relaxation using initial lattice constant guess of a = 8.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 3.8070751870254798, total energy = -0.07381785661290824

Attempting to perform relaxation using initial lattice constant guess of a = 9.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 43
         Function evaluations: 92
Results for this minimization:
  a = 3.8070750695653146, total energy = -0.07381785661290885

Attempting to perform relaxation using initial lattice constant guess of a = 9.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 3.8070751277729786, total energy = -0.07381785661290818

Attempting to perform relaxation using initial lattice constant guess of a = 9.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 3.8070750558748796, total energy = -0.07381785661290668

Attempting to perform relaxation using initial lattice constant guess of a = 9.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 3.8070751656778157, total energy = -0.07381785661290768

Attempting to perform relaxation using initial lattice constant guess of a = 9.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.8070750947110397, total energy = -0.07381785661290646

Attempting to perform relaxation using initial lattice constant guess of a = 9.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 3.807075186818825, total energy = -0.0738178566129078

Attempting to perform relaxation using initial lattice constant guess of a = 9.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 3.807075151987366, total energy = -0.07381785661290785

Attempting to perform relaxation using initial lattice constant guess of a = 9.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 3.807075268030163, total energy = -0.07381785661290624

Attempting to perform relaxation using initial lattice constant guess of a = 10.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.073818
         Iterations: 42
         Function evaluations: 92
Results for this minimization:
  a = 3.8070751425111666, total energy = -0.07381785661290818

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


Attempting to perform relaxation using initial lattice constant guess of a = [3.80707515] Angstroms and c = 4.9735421487287965 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 5.284388533024346 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 5.595234917319896 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 5.906081301615446 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 6.216927685910996 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 6.527774070206545 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 6.838620454502095 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 7.149466838797645 = ([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 = 10.0 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 = [3.80707515] Angstroms and c = 7.460313223093195 = ([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 = 10.0 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 = [3.80707515] Angstroms, c = [6.21692769] Angstroms, c/a = 1.632993

 Total energy: -0.07381785661290946 eV

 Cohesive energy: -0.018454464153227365 eV/atom

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