Element = Lattice = Model = Element: C
Lattice: hcp
Model: Tersoff_LAMMPS_ErhartAlbe_2005SiII_SiC__MO_408791041969_002
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: 75
Results for this minimization:
  a = 1.9368047073483492, total energy = -11.561057728164627

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: 80
Results for this minimization:
  a = 1.93680470706895, total energy = -11.561057728164629

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: 75
Results for this minimization:
  a = 1.9368047075695358, total energy = -11.56105772816463

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 = 1.9368047064635925, 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: 71
Results for this minimization:
  a = 1.9368047074181969, total energy = -11.56105772816463

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: 34
         Function evaluations: 71
Results for this minimization:
  a = 1.9368047064170246, total energy = -11.56105772816463

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: 33
         Function evaluations: 68
Results for this minimization:
  a = 1.9368047080817634, 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: 32
         Function evaluations: 68
Results for this minimization:
  a = 1.9368047076277435, total energy = -11.561057728164625

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: 34
         Function evaluations: 72
Results for this minimization:
  a = 1.9368047041818504, total energy = -11.561057728164627

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: 35
         Function evaluations: 73
Results for this minimization:
  a = 1.9368047088501044, total energy = -11.561057728164629

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: 71
Results for this minimization:
  a = 1.9368047062307592, total energy = -11.561057728164625

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 = 2.5302310746484005 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 78
         Function evaluations: 163
Results for this minimization:
  a = 2.4885497874556437, c = 2.1470967303461146, total energy = -16.316631018301806

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 2.6883705168139254 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 75
         Function evaluations: 156
Results for this minimization:
  a = 2.488549765315022, c = 2.147096738977909, total energy = -16.31663101830179

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 2.8465099589794502 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 74
         Function evaluations: 160
Results for this minimization:
  a = 2.4885497559843186, c = 2.147096725955582, total energy = -16.316631018301813

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.004649401144975 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 84
         Function evaluations: 176
Results for this minimization:
  a = 2.4885497491459483, c = 2.147096725283557, total energy = -16.316631018301813

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.1627888433105 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.561058
         Iterations: 69
         Function evaluations: 145
Results for this minimization:
  a = 1.9366368488801466, c = 3.163337485667605, total energy = -11.561058378605615

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.320928285476025 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.316631
         Iterations: 83
         Function evaluations: 172
Results for this minimization:
  a = 2.4885497609838207, c = 2.147096725647687, total energy = -16.316631018301802

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.47906772764155 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 88
         Function evaluations: 198
Results for this minimization:
  a = 1.8570218831110599, c = 3.9012434687535036, total energy = -11.49518051550354

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.6372071698070747 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 93
         Function evaluations: 206
Results for this minimization:
  a = 1.8570218842578579, c = 3.952902443889653, total energy = -11.495180515503542

Attempting to perform relaxation using initial lattice constant guess of a = [1.93680471] Angstroms and c = 3.7953466119725996 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.495181
         Iterations: 89
         Function evaluations: 208
Results for this minimization:
  a = 1.857021888933857, c = 3.86170030528263, total energy = -11.495180515503538