Element = Lattice = Model = Element: C
Lattice: hcp
Model: Tersoff_LAMMPS_ErhartAlbe_2005_SiC__MO_903987585848_005
Computed model cutoff of 2.1499999973923365 Angstroms
Computed isolated atomic energy of 0.0 eV for species C

==============================================================================
==============================================================================
 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: -11.561058
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 1.9368047073483492, total energy = -11.561057886777245

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: -11.561058
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 1.9368047104217112, total energy = -11.561057886777236

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: -11.561058
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 1.936804705299437, total energy = -11.56105788677724

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: -11.561058
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 1.9368047082563886, total energy = -11.561057886777242

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: -11.561058
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 1.9368047073483476, total energy = -11.561057886777238

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: -11.561058
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 1.9368047088384635, total energy = -11.561057886777238

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: -11.561058
         Iterations: 32
         Function evaluations: 67
Results for this minimization:
  a = 1.9368047072668562, total energy = -11.56105788677724

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: -11.561058
         Iterations: 31
         Function evaluations: 67
Results for this minimization:
  a = 1.9368047086754814, total energy = -11.56105788677724

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: -11.561058
         Iterations: 32
         Function evaluations: 67
Results for this minimization:
  a = 1.936804707348347, total energy = -11.561057886777235

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: -11.561058
         Iterations: 33
         Function evaluations: 68
Results for this minimization:
  a = 1.9368047078605741, total energy = -11.561057886777235

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: -11.561058
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 1.936804703768575, total energy = -11.561057886777233

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 2.375, total energy = 0.0

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 = 2.5, 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: 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 = 2.75 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 = [1.93680471] Angstroms and c = 2.5302310743594436 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 85
         Function evaluations: 164
Results for this minimization:
  a = 2.48854976681758, c = 2.1470967267065126, total energy = -16.31663121361996

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 2.6883705165069087 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 80
         Function evaluations: 166
Results for this minimization:
  a = 2.4885497613699727, c = 2.1470967205419873, total energy = -16.316631213619956

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 2.846509958654374 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 76
         Function evaluations: 156
Results for this minimization:
  a = 2.4885497619998738, c = 2.147096728021329, total energy = -16.316631213619956

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.004649400801839 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 83
         Function evaluations: 172
Results for this minimization:
  a = 2.488549786808708, c = 2.1470967286484255, total energy = -16.31663121361999

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.162788842949304 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.561059
         Iterations: 70
         Function evaluations: 145
Results for this minimization:
  a = 1.9366368487103889, c = 3.163337452317401, total energy = -11.561058537218187

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.320928285096769 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 80
         Function evaluations: 165
Results for this minimization:
  a = 2.4885497625152952, c = 2.147096722847476, total energy = -16.31663121361999

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.4790677272442343 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 90
         Function evaluations: 198
Results for this minimization:
  a = 1.8570218833779304, c = 3.9038259485887696, total energy = -11.495180660605325

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.6372071693916994 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 84
         Function evaluations: 191
Results for this minimization:
  a = 1.8570218833121115, c = 3.951423163924625, total energy = -11.495180660605325

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.7953466115391645 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 90
         Function evaluations: 212
Results for this minimization:
  a = 1.8570218831044518, c = 3.881054447670862, total energy = -11.495180660605328