Element = Lattice = Model = Element: Si
Lattice: hcp
Model: Tersoff_LAMMPS_ErhartAlbe_2005SiII_SiC__MO_408791041969_003
Computed model cutoff of 3.0499999976158345 Angstroms
Computed isolated atomic energy of 0.0 eV for species Si

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


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

Optimization terminated successfully.
         Current function value: -15.946183
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.7902276184409884, total energy = -15.946182705388258

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

Optimization terminated successfully.
         Current function value: -15.946183
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 2.7902276119217264, total energy = -15.946182705388262

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

Optimization terminated successfully.
         Current function value: -15.946183
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.7902276143431664, total energy = -15.946182705388258

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: -15.946183
         Iterations: 42
         Function evaluations: 89
Results for this minimization:
  a = 2.790227611595771, total energy = -15.946182705388269

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: -15.946183
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.790227615972984, total energy = -15.94618270538826

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: -15.946183
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 2.7902276148088294, total energy = -15.946182705388262

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: -15.946183
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.7902276061475284, total energy = -15.946182705388258

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: -15.946183
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.7902276180684566, total energy = -15.946182705388262

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: -15.946183
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.7902276158332846, total energy = -15.946182705388262

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: -15.946183
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 2.790227612579475, total energy = -15.946182705388265

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: -15.946183
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.7902276068925858, total energy = -15.946182705388258

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: -15.946183
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.79022761346714, total energy = -15.946182705388267

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: -15.946183
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 2.7902276103850454, total energy = -15.946182705388262

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: -15.946183
         Iterations: 32
         Function evaluations: 66
Results for this minimization:
  a = 2.7902276147855445, total energy = -15.94618270538826

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: -15.946183
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.790227611595765, total energy = -15.946182705388269

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: -15.946183
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.79022761270171, total energy = -15.946182705388262

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: -15.946183
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 2.790227615833282, total energy = -15.946182705388264

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: -15.946183
         Iterations: 34
         Function evaluations: 69
Results for this minimization:
  a = 2.7902276144595817, total energy = -15.946182705388257

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.25, total energy = 0.0

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.375, total energy = 0.0

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.5, total energy = 0.0

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


Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 3.645138087804932 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.949229
         Iterations: 79
         Function evaluations: 162
Results for this minimization:
  a = 4.049114398609182, c = 2.586603020860985, total energy = -16.949228795520533

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 3.87295921829274 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 88
         Function evaluations: 182
Results for this minimization:
  a = 2.7766216177072796, c = 4.600268487811379, total energy = -15.955591010624964

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.100780348780548 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 74
         Function evaluations: 152
Results for this minimization:
  a = 2.7766216110942703, c = 4.600268510240299, total energy = -15.955591010624964

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.3286014792683565 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 72
         Function evaluations: 150
Results for this minimization:
  a = 2.7766216042767744, c = 4.6002685026850365, total energy = -15.955591010624975

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.556422609756165 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 64
         Function evaluations: 139
Results for this minimization:
  a = 2.776621606550665, c = 4.600268506149993, total energy = -15.955591010624966

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.784243740243973 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 76
         Function evaluations: 162
Results for this minimization:
  a = 2.776621610149175, c = 4.600268501547866, total energy = -15.955591010624968

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 5.0120648707317805 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 70
         Function evaluations: 150
Results for this minimization:
  a = 2.776621606281222, c = 4.600268515696483, total energy = -15.955591010624971

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 5.239886001219589 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 83
         Function evaluations: 170
Results for this minimization:
  a = 2.7766216040806224, c = 4.600268519943693, total energy = -15.955591010624962

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 5.467707131707398 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.626780
         Iterations: 87
         Function evaluations: 206
Results for this minimization:
  a = 2.5957846980313573, c = 6.128102584356387, total energy = -14.626780041269745