Element = Lattice = Model = Element: Si
Lattice: hcp
Model: Tersoff_LAMMPS_ErhartAlbe_2005SiII_SiC__MO_408791041969_002
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: 41
         Function evaluations: 87
Results for this minimization:
  a = 2.7902276123641125, total energy = -15.94618270538826

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: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.7902276158332855, total energy = -15.946182705388262

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: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.7902276087552327, total energy = -15.94618270538826

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: 37
         Function evaluations: 75
Results for this minimization:
  a = 2.790227615193, total energy = -15.94618270538826

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 = 2.7902276098611765, 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: 75
Results for this minimization:
  a = 2.7902276098728205, total energy = -15.946182705388265

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: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.7902276168344553, total energy = -15.946182705388264

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: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.79022761171218, total energy = -15.94618270538826

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: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.790227612748275, total energy = -15.94618270538826

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: 73
Results for this minimization:
  a = 2.7902276144595817, total energy = -15.946182705388269

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: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.790227603539826, total energy = -15.946182705388255

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 = 2.7902276131324473, total energy = -15.946182705388265

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: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.790227619931101, total energy = -15.946182705388255

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: 72
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: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.790227618534118, 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 = 3.6451380915461984 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.949229
         Iterations: 82
         Function evaluations: 167
Results for this minimization:
  a = 4.049114412893051, c = 2.586603038972928, total energy = -16.94922879552054

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 3.872959222267836 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 83
         Function evaluations: 173
Results for this minimization:
  a = 2.7766216128504375, c = 4.6002684840057, total energy = -15.955591010624959

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.1007803529894735 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 81
         Function evaluations: 163
Results for this minimization:
  a = 2.776621601789622, c = 4.600268527009728, total energy = -15.955591010624962

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.328601483711111 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 71
         Function evaluations: 150
Results for this minimization:
  a = 2.776621607921589, c = 4.600268496107285, total energy = -15.955591010624966

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.556422614432749 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 65
         Function evaluations: 140
Results for this minimization:
  a = 2.776621605020831, c = 4.600268507753096, total energy = -15.955591010624968

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 4.784243745154386 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 73
         Function evaluations: 152
Results for this minimization:
  a = 2.776621596163528, c = 4.600268518033337, total energy = -15.955591010624959

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 5.012064875876024 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 74
         Function evaluations: 152
Results for this minimization:
  a = 2.7766216089257165, c = 4.6002684921330115, total energy = -15.955591010624964

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 5.239886006597661 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.955591
         Iterations: 79
         Function evaluations: 167
Results for this minimization:
  a = 2.776621600560664, c = 4.600268529382777, total energy = -15.955591010624966

Attempting to perform relaxation using initial lattice constant guess of a = [2.79022761] Angstroms and c = 5.467707137319299 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.626780
         Iterations: 88
         Function evaluations: 216
Results for this minimization:
  a = 2.595784690431056, c = 5.6966496461964615, total energy = -14.626780041269745