Element = Lattice = Model = Element: Si
Lattice: hcp
Model: Tersoff_LAMMPS_ErhartAlbe_2005_SiC__MO_903987585848_003
Computed model cutoff of 2.9599999915808666 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: -15.815132
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.7206154197454486, total energy = -15.815131941033995

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: -15.815132
         Iterations: 40
         Function evaluations: 82
Results for this minimization:
  a = 2.720615414483473, total energy = -15.815131941034

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: -15.815132
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.720615416765213, total energy = -15.815131941033997

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: -15.815132
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 2.7206154227256834, total energy = -15.815131941033993

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: -15.815132
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.720615420630205, total energy = -15.815131941033998

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: -15.815132
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.720615416171497, total energy = -15.815131941034

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: -15.815132
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.7206154188141225, total energy = -15.815131941033997

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: -15.815132
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.7206154196173884, total energy = -15.815131941033995

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: -15.815132
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.720615417510273, total energy = -15.815131941033998

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: -15.815132
         Iterations: 35
         Function evaluations: 72
Results for this minimization:
  a = 2.7206154151353985, total energy = -15.815131941033993

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: -15.815132
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 2.7206154186744254, total energy = -15.815131941034002

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: -15.815132
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.720615414204076, total energy = -15.815131941033995

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: -15.815132
         Iterations: 33
         Function evaluations: 69
Results for this minimization:
  a = 2.7206154166487977, total energy = -15.815131941033995

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: -15.815132
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 2.720615419303068, total energy = -15.815131941033997

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: -15.815132
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.7206154188839715, total energy = -15.815131941033997

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: -15.815132
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 2.7206154193321694, total energy = -15.815131941033998

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: -15.815132
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.7206154160201548, total energy = -15.815131941033993

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 = [2.72061542] Angstroms and c = 3.5541970997870758 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -16.348590
         Iterations: 73
         Function evaluations: 163
Results for this minimization:
  a = 4.0176298965165085, c = 2.589919843865907, total energy = -16.34858993921827

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 3.776334418523768 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.818350
         Iterations: 72
         Function evaluations: 150
Results for this minimization:
  a = 2.714718268575142, c = 4.462108604416951, total energy = -15.818350437192906

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 3.99847173726046 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.818350
         Iterations: 73
         Function evaluations: 148
Results for this minimization:
  a = 2.7147182721148306, c = 4.46210859970487, total energy = -15.818350437192906

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 4.220609055997152 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.818350
         Iterations: 66
         Function evaluations: 143
Results for this minimization:
  a = 2.714718263466671, c = 4.462108625222961, total energy = -15.818350437192905

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 4.4427463747338445 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.818350
         Iterations: 65
         Function evaluations: 135
Results for this minimization:
  a = 2.714718268770347, c = 4.46210861035084, total energy = -15.818350437192905

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 4.664883693470537 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.818350
         Iterations: 68
         Function evaluations: 142
Results for this minimization:
  a = 2.7147182704388264, c = 4.462108600269117, total energy = -15.818350437192905

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 4.887021012207229 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.818350
         Iterations: 74
         Function evaluations: 153
Results for this minimization:
  a = 2.714718265650737, c = 4.462108616194989, total energy = -15.818350437192903

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 5.109158330943921 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.818350
         Iterations: 79
         Function evaluations: 164
Results for this minimization:
  a = 2.714718263040904, c = 4.462108617635129, total energy = -15.818350437192903

Attempting to perform relaxation using initial lattice constant guess of a = [2.72061542] Angstroms and c = 5.331295649680613 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -13.443569
         Iterations: 85
         Function evaluations: 207
Results for this minimization:
  a = 2.606835211228437, c = 5.388427685877453, total energy = -13.44356894095675