Element = Lattice = Model = Element: Ga
Lattice: hcp
Model: Tersoff_LAMMPS_NordAlbeErhart_2003_GaN__MO_612061685362_004
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: 36
         Function evaluations: 74
Results for this minimization:
  a = 2.809154824353756, total energy = -10.606902712473339

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: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.8091548239346595, total energy = -10.60690271247333

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: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.809154828940518, 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: 69
Results for this minimization:
  a = 2.8091548271477222, total energy = -10.606902712473333

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 = 2.8091548291034996, total energy = -10.606902712473332

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 = 2.809154826961458, total energy = -10.606902712473321

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 = 2.8091548308730117, total energy = -10.606902712473326

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: 72
Results for this minimization:
  a = 2.8091548204421986, total energy = -10.606902712473316

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: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.809154824935831, total energy = -10.606902712473325

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: 74
         Function evaluations: 156
Results for this minimization:
  a = 4.1165053019416025, c = 2.6650090439567995, total energy = -11.374661981919443

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: 155
Results for this minimization:
  a = 2.788199374605015, c = 4.6506837472982445, 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 = 2.7881993697684555, c = 4.650683762423917, total energy = -10.621225088453107

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: 70
         Function evaluations: 144
Results for this minimization:
  a = 2.7881993559331386, c = 4.650683779752074, total energy = -10.621225088453096

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: 65
         Function evaluations: 141
Results for this minimization:
  a = 2.788199372473021, c = 4.6506837601954, total energy = -10.621225088453102

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: 144
Results for this minimization:
  a = 2.788199359516815, c = 4.6506837565545025, total energy = -10.621225088453093

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: 83
         Function evaluations: 169
Results for this minimization:
  a = 2.7881993572130837, c = 4.6506837955553415, total energy = -10.621225088453102

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: 86
         Function evaluations: 182
Results for this minimization:
  a = 2.788199360945757, c = 4.6506837682499915, total energy = -10.6212250884531

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: -9.275146
         Iterations: 96
         Function evaluations: 223
Results for this minimization:
  a = 2.692661008181, c = 6.314436717133999, total energy = -9.275146264686342