Element = Lattice = Model = Element: Ga
Lattice: hcp
Model: Tersoff_LAMMPS_NordAlbeErhart_2003_GaN__MO_612061685362_003
Computed model cutoff of 3.0200000027567353 Angstroms
Computed isolated atomic energy of 0.0 eV for species Ga

==============================================================================
==============================================================================
 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: -10.606903
         Iterations: 39
         Function evaluations: 81
Results for this minimization:
  a = 2.8091548249125515, total energy = -10.60690271247335

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: -10.606903
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.8091548266587782, total energy = -10.606902712473357

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: -10.606903
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.8091548271477222, total energy = -10.606902712473335

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: -10.606903
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.809154824912554, total energy = -10.606902712473339

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: -10.606903
         Iterations: 40
         Function evaluations: 83
Results for this minimization:
  a = 2.809154826449232, total energy = -10.606902712473362

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: -10.606903
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.809154827892783, total energy = -10.606902712473328

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: -10.606903
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.809154824540019, total energy = -10.606902712473335

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: -10.606903
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8091548264492303, total energy = -10.606902712473348

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: -10.606903
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.809154830966147, total energy = -10.606902712473325

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: -10.606903
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.8091548239579436, total energy = -10.606902712473326

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: -10.606903
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.8091548243537554, total energy = -10.606902712473328

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: -10.606903
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.8091548267286264, total energy = -10.606902712473328

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: -10.606903
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.8091548271477222, total energy = -10.606902712473344

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: -10.606903
         Iterations: 32
         Function evaluations: 67
Results for this minimization:
  a = 2.8091548271477222, total energy = -10.606902712473339

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: -10.606903
         Iterations: 32
         Function evaluations: 67
Results for this minimization:
  a = 2.80915482849814, total energy = -10.606902712473325

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: -10.606903
         Iterations: 33
         Function evaluations: 69
Results for this minimization:
  a = 2.809154822304844, total energy = -10.606902712473318

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: -10.606903
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.809154827147722, total energy = -10.606902712473333

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: -10.606903
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.8091548243537545, total energy = -10.606902712473326

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 = [2.80915483] Angstroms and c = 3.6698644977478683 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.374662
         Iterations: 80
         Function evaluations: 166
Results for this minimization:
  a = 4.116505281985594, c = 2.665009089138266, total energy = -11.374661981919457

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 3.89923102885711 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 72
         Function evaluations: 157
Results for this minimization:
  a = 2.7881993680813615, c = 4.6506837662178, total energy = -10.621225088453091

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 4.128597559966352 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 72
         Function evaluations: 151
Results for this minimization:
  a = 2.7881993787658343, c = 4.650683749087399, total energy = -10.621225088453095

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 4.357964091075593 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 72
         Function evaluations: 155
Results for this minimization:
  a = 2.7881993851037308, c = 4.650683728512796, total energy = -10.621225088453087

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 4.587330622184835 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 63
         Function evaluations: 139
Results for this minimization:
  a = 2.7881993712751276, c = 4.650683750874448, total energy = -10.621225088453091

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 4.8166971532940765 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 68
         Function evaluations: 145
Results for this minimization:
  a = 2.7881993603304505, c = 4.650683757588614, total energy = -10.621225088453084

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 5.046063684403318 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 82
         Function evaluations: 165
Results for this minimization:
  a = 2.7881993722958676, c = 4.650683754716667, total energy = -10.62122508845309

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 5.27543021551256 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 179
         Function evaluations: 337
Results for this minimization:
  a = 2.7881993671831617, c = 4.6506837592881825, total energy = -10.621225088453091

Attempting to perform relaxation using initial lattice constant guess of a = [2.80915483] Angstroms and c = 5.5047967466218015 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.621225
         Iterations: 140
         Function evaluations: 272
Results for this minimization:
  a = 2.7881993705431554, c = 4.650683751501408, total energy = -10.621225088453095