Element = Lattice = Model = Element: Cl
Lattice: hcp
Model: Sim_LAMMPS_ReaxFF_BrugnoliMiyataniAkaji_SiCeNaClHO_2023__SM_282799919035_000
Computed model cutoff of 9.995503467395904 Angstroms
Computed isolated atomic energy of -4.4992694244655834e-07 eV for species Cl

==============================================================================
==============================================================================
 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: -0.018724
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 5.757833603769562, total energy = -0.018723820005710424

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: -0.018724
         Iterations: 42
         Function evaluations: 91
Results for this minimization:
  a = 5.757833558321009, total energy = -0.018723820005708262

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: -0.018724
         Iterations: 40
         Function evaluations: 90
Results for this minimization:
  a = 5.757833689980912, total energy = -0.018723820005709938

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: -0.018724
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 5.75783355301246, total energy = -0.018723820005710465

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: -0.018724
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 5.757833718031179, total energy = -0.018723820005709695

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: -0.018724
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 5.757833481673159, total energy = -0.018723820005710212

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: -0.018724
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 5.757833563908937, total energy = -0.01872382000571048

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: -0.018724
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 5.757833561883309, total energy = -0.018723820005710462

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: -0.018724
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 5.757833573780949, total energy = -0.01872382000571048

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: -0.018724
         Iterations: 42
         Function evaluations: 89
Results for this minimization:
  a = 5.757833555340767, total energy = -0.018723820005710465

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: -0.018724
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 5.757833531498913, total energy = -0.018723820005710427

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: -0.018724
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 5.75783354537563, total energy = -0.018723820005710455

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: -0.018724
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 5.757833601534365, total energy = -0.018723820005710424

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: -0.018724
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 5.757833611685789, total energy = -0.01872382000571039

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: -0.018724
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 5.75783358879562, total energy = -0.018723820005710465

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: -0.018724
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 5.757833573222163, total energy = -0.018723820005710472

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: -0.018724
         Iterations: 38
         Function evaluations: 84
Results for this minimization:
  a = 5.757833504676828, total energy = -0.018723820005710316

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: -0.018724
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 5.757833552360536, total energy = -0.018723820005710455

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: -0.018724
         Iterations: 39
         Function evaluations: 87
Results for this minimization:
  a = 5.7578336829785295, total energy = -0.018723820005710008

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: -0.018724
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 5.7578336130827665, total energy = -0.01872382000571038

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: -0.018724
         Iterations: 38
         Function evaluations: 84
Results for this minimization:
  a = 5.757833754294554, total energy = -0.018723820005709248

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: -0.018724
         Iterations: 37
         Function evaluations: 83
Results for this minimization:
  a = 5.757833483815198, total energy = -0.018723820005710226

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: -0.018724
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 5.757833564328026, total energy = -0.018723820005710448

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: -0.018724
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 5.7578334689140345, total energy = -0.018723820005710143

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: -0.018724
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 5.757833536714315, total energy = -0.01872382000571043

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: -0.018724
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 5.757833531498911, total energy = -0.018723820005710424

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: -0.018724
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 5.75783352880535, total energy = -0.018723820005710424

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: -0.018724
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 5.757833513617514, total energy = -0.018723820005710372

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: -0.018724
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 5.757833640795434, total energy = -0.018723820005710268

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: -0.018724
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 5.757833518087864, total energy = -0.01872382000571036

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: -0.018724
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 5.757833583711182, total energy = -0.018723820005710455

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: -0.018724
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 5.757833551056681, total energy = -0.01872382000571046

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: -0.018724
         Iterations: 36
         Function evaluations: 80
Results for this minimization:
  a = 5.757833603024481, total energy = -0.018723820005710417

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: -0.018724
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 5.75783354640007, total energy = -0.01872382000571046

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: -0.018724
         Iterations: 35
         Function evaluations: 80
Results for this minimization:
  a = 5.757833317446057, total energy = -0.018723820005708318

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: -0.018724
         Iterations: 36
         Function evaluations: 82
Results for this minimization:
  a = 5.757833558693528, total energy = -0.018723820005710472

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: -0.018724
         Iterations: 34
         Function evaluations: 76
Results for this minimization:
  a = 5.757833550596843, total energy = -0.018723820005710465

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: -0.018724
         Iterations: 36
         Function evaluations: 82
Results for this minimization:
  a = 5.757833439856767, total energy = -0.018723820005709938

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: -0.018724
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 5.75783357518812, total energy = -0.018723820005710476

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: -0.018724
         Iterations: 35
         Function evaluations: 77
Results for this minimization:
  a = 5.757833383977413, total energy = -0.018723820005709324

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: -0.018724
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 5.757833544909953, total energy = -0.018723820005710434

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: -0.018724
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 5.757833574432879, total energy = -0.01872382000571046

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: -0.018724
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 5.7578334799269175, total energy = -0.018723820005710212

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: -0.018724
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 5.757833343744278, total energy = -0.01872382000570873

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: -0.018724
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 5.757833524374291, total energy = -0.01872382000571041

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: -0.018724
         Iterations: 38
         Function evaluations: 85
Results for this minimization:
  a = 5.757833474129438, total energy = -0.0187238200057102

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: -0.018724
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 5.757833513617517, total energy = -0.01872382000571036

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: -0.018724
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 5.757833584398029, total energy = -0.018723820005710462

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: -0.018724
         Iterations: 36
         Function evaluations: 80
Results for this minimization:
  a = 5.757833528518676, total energy = -0.018723820005710417

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: -0.018724
         Iterations: 37
         Function evaluations: 83
Results for this minimization:
  a = 5.757833629846573, total energy = -0.018723820005710323

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: -0.018724
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 5.757833553629463, total energy = -0.018723820005710465

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: -0.018724
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 5.757833570241923, total energy = -0.018723820005710455

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: -0.018724
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 5.757833531498903, total energy = -0.01872382000571043

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: -0.018724
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 5.757833528518675, total energy = -0.018723820005710417

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: -0.018724
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 5.757833568379283, total energy = -0.018723820005710472

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: -0.018724
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 5.757833575084809, total energy = -0.018723820005710465

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: -0.018724
         Iterations: 38
         Function evaluations: 85
Results for this minimization:
  a = 5.757833366486004, total energy = -0.01872382000570909

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: -0.018724
         Iterations: 39
         Function evaluations: 87
Results for this minimization:
  a = 5.75783366048708, total energy = -0.018723820005710143

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: -0.018724
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 5.757833464945723, total energy = -0.018723820005710115

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: -0.018724
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 5.757833660783945, total energy = -0.018723820005710174

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: -0.018724
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 5.757833479251715, total energy = -0.018723820005710205

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: -0.018724
         Iterations: 38
         Function evaluations: 85
Results for this minimization:
  a = 5.7578336588514425, total energy = -0.018723820005710178

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: -0.018724
         Iterations: 40
         Function evaluations: 90
Results for this minimization:
  a = 5.757833666141955, total energy = -0.018723820005710122

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: -0.018724
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 5.757833690493131, total energy = -0.018723820005709938

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: -0.018724
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 5.757833548123017, total energy = -0.01872382000571047

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: -0.018724
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 5.757833626866344, total energy = -0.018723820005710337

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: -0.018724
         Iterations: 39
         Function evaluations: 86
Results for this minimization:
  a = 5.75783367394469, total energy = -0.01872382000571007

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: -0.018724
         Iterations: 41
         Function evaluations: 85
Results for this minimization:
  a = 5.757833573827512, total energy = -0.01872382000571048

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: -0.018724
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 5.757833712722637, total energy = -0.018723820005709733

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: -0.018724
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 5.757833540439606, total energy = -0.01872382000571044

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


Attempting to perform relaxation using initial lattice constant guess of a = [5.75783356] Angstroms and c = 7.522002269572082 = ([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 = [5.75783356] Angstroms and c = 7.992127411420337 = ([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 = [5.75783356] Angstroms and c = 8.462252553268591 = ([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 = [5.75783356] Angstroms and c = 8.932377695116848 = ([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 = [5.75783356] Angstroms and c = 9.402502836965102 = ([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 = [5.75783356] Angstroms and c = 9.872627978813359 = ([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 = [5.75783356] Angstroms and c = 10.342753120661612 = ([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 = [5.75783356] Angstroms and c = 10.81287826250987 = ([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 = [5.75783356] Angstroms and c = 11.283003404358123 = ([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 = [5.75783356] Angstroms, c = [9.40250284] Angstroms, c/a = 1.632993

 Total energy: -0.01872382000571048 eV

 Cohesive energy: -0.00468095500142762 eV/atom

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