Element = Lattice = Model = Element: C
Lattice: hcp
Model: Tersoff_LAMMPS_ErhartAlbe_2005SiII_SiC__MO_408791041969_004
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 = 1.936804708465936, total energy = -11.561057728164634

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: 37
         Function evaluations: 78
Results for this minimization:
  a = 1.9368047062307596, total energy = -11.561057728164625

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: 37
         Function evaluations: 77
Results for this minimization:
  a = 1.936804705997929, total energy = -11.561057728164629

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: 35
         Function evaluations: 74
Results for this minimization:
  a = 1.936804705183024, total energy = -11.56105772816463

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: 72
Results for this minimization:
  a = 1.9368047067895542, total energy = -11.561057728164633

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: 35
         Function evaluations: 75
Results for this minimization:
  a = 1.9368047082331041, total energy = -11.561057728164634

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 = 1.9368047086521984, total energy = -11.56105772816463

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: 66
Results for this minimization:
  a = 1.9368047076277435, total energy = -11.561057728164629

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: 66
Results for this minimization:
  a = 1.936804708838463, total energy = -11.56105772816463

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: 69
Results for this minimization:
  a = 1.9368047054857016, total energy = -11.561057728164633

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: 35
         Function evaluations: 74
Results for this minimization:
  a = 1.9368047070689496, total energy = -11.561057728164629

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 = 2.530231075819453 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 77
         Function evaluations: 161
Results for this minimization:
  a = 2.488549782431468, c = 2.147096728255356, total energy = -16.316631018301788

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 2.6883705180581687 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 77
         Function evaluations: 160
Results for this minimization:
  a = 2.4885497678721773, c = 2.1470967288121448, total energy = -16.316631018301837

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 2.8465099602968844 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 79
         Function evaluations: 165
Results for this minimization:
  a = 2.4885497485603163, c = 2.147096730508556, total energy = -16.316631018301788

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.0046494025356 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 82
         Function evaluations: 173
Results for this minimization:
  a = 2.488549774386035, c = 2.1470967230680653, total energy = -16.316631018301795

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.1627888447743158 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.561058
         Iterations: 67
         Function evaluations: 145
Results for this minimization:
  a = 1.9366368409704728, c = 3.163337500203772, total energy = -11.561058378605615

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.3209282870130314 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 80
         Function evaluations: 164
Results for this minimization:
  a = 2.4885497970349073, c = 2.1470967310211964, total energy = -16.31663101830178

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.479067729251747 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 86
         Function evaluations: 193
Results for this minimization:
  a = 1.8570218833103602, c = 3.90121059905846, total energy = -11.495180515503545

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.637207171490463 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 88
         Function evaluations: 208
Results for this minimization:
  a = 1.857021878480297, c = 4.3486321955863065, total energy = -11.49518051550354

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.7953466137291785 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 77
         Function evaluations: 184
Results for this minimization:
  a = 1.8570218792625866, c = 3.9056145778934486, total energy = -11.495180515503543