Element = Lattice = Model = Element: Si
Lattice: hcp
Model: Tersoff_LAMMPS_ErhartAlbe_2005SiII_SiC__MO_408791041969_004
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: 75
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: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.790227615274489, total energy = -15.946182705388265

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: 72
Results for this minimization:
  a = 2.790227613598111, total energy = -15.946182705388258

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 = 2.7902276093140257, 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: 74
Results for this minimization:
  a = 2.7902276119217273, total energy = -15.946182705388264

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: 72
Results for this minimization:
  a = 2.790227613411843, total energy = -15.946182705388265

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: 74
Results for this minimization:
  a = 2.790227614575997, 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: 33
         Function evaluations: 70
Results for this minimization:
  a = 2.790227606962435, 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: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.7902276121079925, 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: 71
Results for this minimization:
  a = 2.790227616182528, 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: 73
Results for this minimization:
  a = 2.7902276180684566, total energy = -15.946182705388258

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: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.790227610457805, total energy = -15.946182705388264

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: 165
Results for this minimization:
  a = 4.049114427604321, c = 2.5866030327280285, 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: 82
         Function evaluations: 171
Results for this minimization:
  a = 2.776621623305333, c = 4.600268481496405, total energy = -15.955591010624955

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: 73
         Function evaluations: 153
Results for this minimization:
  a = 2.7766216043925445, c = 4.6002685092410385, total energy = -15.955591010624962

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: 70
         Function evaluations: 148
Results for this minimization:
  a = 2.7766216027074035, c = 4.600268526067377, total energy = -15.955591010624964

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: 71
         Function evaluations: 155
Results for this minimization:
  a = 2.776621604249357, c = 4.600268510736935, total energy = -15.955591010624962

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: 73
         Function evaluations: 154
Results for this minimization:
  a = 2.7766216075591394, c = 4.600268517408567, total energy = -15.955591010624964

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: 74
         Function evaluations: 157
Results for this minimization:
  a = 2.7766216003126614, c = 4.600268524144999, total energy = -15.955591010624964

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: 81
         Function evaluations: 166
Results for this minimization:
  a = 2.776621602067478, c = 4.600268500434698, total energy = -15.955591010624964

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: 90
         Function evaluations: 214
Results for this minimization:
  a = 2.595784691794713, c = 6.239165385029805, total energy = -14.626780041269742