Element = Lattice = Model = Element: N
Lattice: hcp
Model: Tersoff_LAMMPS_KinaciHaskinsSevik_2012_BNC__MO_105008013807_000
Computed model cutoff of 2.09999999832366 Angstroms
Computed isolated atomic energy of 0.0 eV for species N

==============================================================================
==============================================================================
 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: -5.021734
         Iterations: 36
         Function evaluations: 74
Results for this minimization:
  a = 1.480104483943434, total energy = -5.021734459661197

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: -5.021734
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 1.4801044831518086, total energy = -5.02173445966119

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: -5.021734
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 1.480104484129697, total energy = -5.02173445966119

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: -5.021734
         Iterations: 33
         Function evaluations: 68
Results for this minimization:
  a = 1.4801044833846388, total energy = -5.021734459661189

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: -5.021734
         Iterations: 31
         Function evaluations: 66
Results for this minimization:
  a = 1.4801044844090936, total energy = -5.021734459661189

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: -5.021734
         Iterations: 33
         Function evaluations: 69
Results for this minimization:
  a = 1.4801044840365647, total energy = -5.021734459661192

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: -5.021734
         Iterations: 36
         Function evaluations: 74
Results for this minimization:
  a = 1.480104483617469, total energy = -5.021734459661187

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: -5.021734
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 1.480104484478943, total energy = -5.021734459661194

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: -5.021734
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 1.480104484036565, total energy = -5.02173445966119

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: -5.021734
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 1.4801044825697312, total energy = -5.02173445966119

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: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 2.25, total energy = 0.0

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 = [1.48010448] Angstroms and c = 1.9336004008889767 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 76
         Function evaluations: 156
Results for this minimization:
  a = 1.4798846329925313, c = 2.417718384723254, total energy = -5.021734785663738

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.0544504259445375 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 78
         Function evaluations: 162
Results for this minimization:
  a = 1.4798846500877516, c = 2.4177183245913145, total energy = -5.021734785663737

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.1753004510000986 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 76
         Function evaluations: 163
Results for this minimization:
  a = 1.4798846470973683, c = 2.4177183476763, total energy = -5.02173478566374

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.2961504760556593 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 72
         Function evaluations: 152
Results for this minimization:
  a = 1.4798846261340415, c = 2.417718403557632, total energy = -5.02173478566374

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.41700050111122 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 72
         Function evaluations: 149
Results for this minimization:
  a = 1.4798846392575529, c = 2.4177183693643975, total energy = -5.021734785663739

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.537850526166781 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 68
         Function evaluations: 148
Results for this minimization:
  a = 1.4798846490847817, c = 2.417718342788729, total energy = -5.021734785663741

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.658700551222342 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 77
         Function evaluations: 160
Results for this minimization:
  a = 1.479884651802118, c = 2.4177183242227867, total energy = -5.021734785663738

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.7795505762779027 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 73
         Function evaluations: 154
Results for this minimization:
  a = 1.4798846233914826, c = 2.4177184266612306, total energy = -5.021734785663738

Attempting to perform relaxation using initial lattice constant guess of a = [1.48010448] Angstroms and c = 2.9004006013334633 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -5.021735
         Iterations: 73
         Function evaluations: 156
Results for this minimization:
  a = 1.479884633937636, c = 2.417718386667227, total energy = -5.021734785663738

==============================================================================
==============================================================================
 Finished with optimization
==============================================================================
==============================================================================

 Final lattice Constants:
   a = 1.4798846490847817 Angstroms, c = 2.417718342788729 Angstroms, c/a = 1.633721

 Total energy: -5.021734785663741 eV

 Cohesive energy: -1.2554336964159352 eV/atom

==============================================================================
==============================================================================