Element = Lattice = Model = Element: Si
Lattice: hcp
Model: Tersoff_LAMMPS_Tersoff_1990_SiC__MO_444207127575_000
Computed model cutoff of 2.50000000420961 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: -8.716989
         Iterations: 79
         Function evaluations: 161
Results for this minimization:
  a = 2.4999999999971, total energy = -8.716989424732454

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: -8.716989
         Iterations: 61
         Function evaluations: 123
Results for this minimization:
  a = 2.499999999999636, total energy = -8.716989424863272

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: -8.716989
         Iterations: 77
         Function evaluations: 157
Results for this minimization:
  a = 2.499999999996362, total energy = -8.716989424694383

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: -8.716989
         Iterations: 61
         Function evaluations: 123
Results for this minimization:
  a = 2.4999999999987326, total energy = -8.716989424816667

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: -8.716989
         Iterations: 61
         Function evaluations: 124
Results for this minimization:
  a = 2.499999999998547, total energy = -8.716989424807112

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: -8.716989
         Iterations: 60
         Function evaluations: 121
Results for this minimization:
  a = 2.4999999999990896, total energy = -8.716989424835088

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: 0.000000
         Iterations: 36
         Function evaluations: 103
Results for this minimization:
  a = 2.7125000000000004, total energy = 0.0

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: -8.716989
         Iterations: 59
         Function evaluations: 119
Results for this minimization:
  a = 2.4999999999990905, total energy = -8.71698942483517

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: -9.219548
         Iterations: 53
         Function evaluations: 111
Results for this minimization:
  a = 2.500000000000001, total energy = -9.219547937841046

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: -8.716989
         Iterations: 55
         Function evaluations: 110
Results for this minimization:
  a = 2.4999999999992766, total energy = -8.716989424844746

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: -8.716989
         Iterations: 56
         Function evaluations: 112
Results for this minimization:
  a = 2.4999999999996367, total energy = -8.716989424863314

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: -8.716989
         Iterations: 54
         Function evaluations: 108
Results for this minimization:
  a = 2.499999999998179, total energy = -8.71698942478811

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 2.625, total energy = 0.0

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: -8.716989
         Iterations: 49
         Function evaluations: 99
Results for this minimization:
  a = 2.4999999999980016, total energy = -8.716989424778959

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 2.75, total energy = 0.0

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 2.875, total energy = 0.0

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.0, total energy = 0.0

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.125, total energy = 0.0

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 = [2.5] Angstroms and c = 3.2659863237109055 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.175247
         Iterations: 132
         Function evaluations: 263
Results for this minimization:
  a = 3.5377289399952168, c = 2.883163528051849, total energy = -17.175246818776582

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 3.470110468942837 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.175247
         Iterations: 136
         Function evaluations: 267
Results for this minimization:
  a = 3.537729285280485, c = 2.883162963151454, total energy = -17.1752468187781

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 3.6742346141747686 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.175247
         Iterations: 145
         Function evaluations: 288
Results for this minimization:
  a = 3.5377296726291476, c = 2.883162329432878, total energy = -17.175246818777676

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 3.8783587594067 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.175247
         Iterations: 151
         Function evaluations: 291
Results for this minimization:
  a = 3.537729249677139, c = 2.8831630214002626, total energy = -17.175246818778298

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 4.082482904638631 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.942635
         Iterations: 132
         Function evaluations: 292
Results for this minimization:
  a = 2.4999999999999676, c = 4.182432472683498, total energy = -12.94263504643615

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 4.286607049870563 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.942635
         Iterations: 135
         Function evaluations: 306
Results for this minimization:
  a = 2.499999999999964, c = 4.496899630778076, total energy = -12.94263504643603

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 4.490731195102494 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.942635
         Iterations: 122
         Function evaluations: 282
Results for this minimization:
  a = 2.4999999999999627, c = 4.486327326671523, total energy = -12.942635046435969

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 4.694855340334426 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.942635
         Iterations: 124
         Function evaluations: 279
Results for this minimization:
  a = 2.4999999999999543, c = 4.572982675900144, total energy = -12.942635046435818

Attempting to perform relaxation using initial lattice constant guess of a = [2.5] Angstroms and c = 4.8989794855663575 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.942635
         Iterations: 127
         Function evaluations: 291
Results for this minimization:
  a = 2.4999999999999605, c = 4.894187426436281, total energy = -12.942635046435909