Element = Lattice = Model = Element: O
Lattice: hcp
Model: Sim_LAMMPS_ReaxFF_BrugnoliMiyataniAkaji_SiCeNaClHO_2023__SM_282799919035_000
Computed model cutoff of 9.99375 Angstroms
Computed isolated atomic energy of -0.10865229683367895 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))

Optimization terminated successfully.
         Current function value: -0.065436
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.5693718552589555, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 4.569372082874187, total energy = -0.06543616584823336

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: -0.065436
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 4.569371819496158, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.5693718552589395, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 4.569371933117509, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.5693718902766784, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.569371950230564, total energy = -0.06543616584823592

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: -0.065436
         Iterations: 41
         Function evaluations: 91
Results for this minimization:
  a = 4.569372023642062, total energy = -0.06543616584823492

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: -0.065436
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.569372011627998, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 38
         Function evaluations: 84
Results for this minimization:
  a = 4.569371826015413, total energy = -0.06543616584823425

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: -0.065436
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.569371844828131, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 39
         Function evaluations: 87
Results for this minimization:
  a = 4.569371953606612, total energy = -0.06543616584823558

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: -0.065436
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 4.5693719536066055, total energy = -0.06543616584823558

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: -0.065436
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.569372045993809, total energy = -0.06543616584823403

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: -0.065436
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.569371957331896, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 36
         Function evaluations: 82
Results for this minimization:
  a = 4.569371819496157, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.569372001220475, total energy = -0.06543616584823536

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: -0.065436
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.569371854769996, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 4.569371946901085, total energy = -0.06543616584823547

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: -0.065436
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.569371955469251, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 4.569371977678385, total energy = -0.0654361658482357

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: -0.065436
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 4.569371890276673, total energy = -0.06543616584823592

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: -0.065436
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 4.569371933117508, total energy = -0.0654361658482357

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: -0.065436
         Iterations: 33
         Function evaluations: 73
Results for this minimization:
  a = 4.569371950626374, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 4.5693719810806215, total energy = -0.06543616584823436

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: -0.065436
         Iterations: 33
         Function evaluations: 74
Results for this minimization:
  a = 4.569371902942658, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 4.569371969174243, total energy = -0.06543616584823492

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: -0.065436
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 4.569371963851155, total energy = -0.06543616584823592

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: -0.065436
         Iterations: 36
         Function evaluations: 81
Results for this minimization:
  a = 4.5693720480194315, total energy = -0.06543616584823347

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: -0.065436
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.569371819496155, total energy = -0.0654361658482337

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: -0.065436
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 4.569371927203609, total energy = -0.06543616584823436

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: -0.065436
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 4.569371961685828, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 4.569371973956002, total energy = -0.0654361658482348

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: -0.065436
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.5693718552589395, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 4.5693718743132195, total energy = -0.06543616584823436

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: -0.065436
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 4.569371950393538, total energy = -0.06543616584823536

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: -0.065436
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.569371860474348, total energy = -0.06543616584823414

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: -0.065436
         Iterations: 36
         Function evaluations: 81
Results for this minimization:
  a = 4.569372010231016, total energy = -0.06543616584823447

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: -0.065436
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.569371961848807, total energy = -0.06543616584823558

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: -0.065436
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.569371957331896, total energy = -0.06543616584823536

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: -0.065436
         Iterations: 37
         Function evaluations: 82
Results for this minimization:
  a = 4.5693718872964375, total energy = -0.0654361658482347

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: -0.065436
         Iterations: 37
         Function evaluations: 82
Results for this minimization:
  a = 4.569371867924925, total energy = -0.06543616584823514

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: -0.065436
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 4.569371852278705, total energy = -0.0654361658482357

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: -0.065436
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.569371935212983, total energy = -0.06543616584823458

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: -0.065436
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 4.569371933757793, total energy = -0.06543616584823614

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: -0.065436
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 4.569371855014467, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 4.569371934654187, total energy = -0.06543616584823492

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: -0.065436
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.569371914491052, total energy = -0.06543616584823503

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: -0.065436
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.569371909648177, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.569371931720525, total energy = -0.06543616584823514

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: -0.065436
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.56937185712159, total energy = -0.06543616584823458

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: -0.065436
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.569372005827598, total energy = -0.06543616584823558

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: -0.065436
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.569371969997876, total energy = -0.0654361658482357

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: -0.065436
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 4.569371902942657, total energy = -0.06543616584823558

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: -0.065436
         Iterations: 39
         Function evaluations: 86
Results for this minimization:
  a = 4.569372010184452, total energy = -0.06543616584823547

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: -0.065436
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.569371963851157, total energy = -0.06543616584823503

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: -0.065436
         Iterations: 38
         Function evaluations: 86
Results for this minimization:
  a = 4.569371945783486, total energy = -0.06543616584823536

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: -0.065436
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.569371950626367, total energy = -0.06543616584823436

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: -0.065436
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.569371987879272, total energy = -0.06543616584823514

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: -0.065436
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 4.5693720432172995, total energy = -0.06543616584823503

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: -0.065436
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.569371957228579, total energy = -0.0654361658482358

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: -0.065436
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 4.569371887855222, total energy = -0.06543616584823592

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: -0.065436
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 4.569371855910859, total energy = -0.06543616584823536

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: -0.065436
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 4.569371893472266, total energy = -0.06543616584823525

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: -0.065436
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.5693718758411705, total energy = -0.06543616584823492

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: -0.065436
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.569371884167778, total energy = -0.06543616584823514

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: -0.065436
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.569371854362533, total energy = -0.0654361658482357

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: -0.065436
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.569371894560746, total energy = -0.0654361658482348

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: -0.065436
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.56937188962474, total energy = -0.06543616584823514

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: -0.065436
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.5693718353286386, total energy = -0.06543616584823536

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


Attempting to perform relaxation using initial lattice constant guess of a = [4.56937193] Angstroms and c = 5.96940249744056 = ([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 = [4.56937193] Angstroms and c = 6.342490153530595 = ([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 = [4.56937193] Angstroms and c = 6.71557780962063 = ([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 = [4.56937193] Angstroms and c = 7.0886654657106645 = ([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 = [4.56937193] Angstroms and c = 7.461753121800699 = ([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 = [4.56937193] Angstroms and c = 7.834840777890734 = ([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 = [4.56937193] Angstroms and c = 8.207928433980769 = ([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 = [4.56937193] Angstroms and c = 8.581016090070804 = ([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 = [4.56937193] Angstroms and c = 8.954103746160838 = ([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 = [4.56937193] Angstroms, c = [7.46175312] Angstroms, c/a = 1.632993

 Total energy: -0.06543616584823614 eV

 Cohesive energy: -0.016359041462059035 eV/atom

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