Element = Lattice = Model = Element: C
Lattice: hcp
Model: MEAM_LAMMPS_NouranianTschoppGwaltney_2014_CH__MO_354152387712_000
Computed model cutoff of 3.000000004544875 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: -52.198067
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 1.8055645720101912, total energy = -52.19806704753889

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: -52.198067
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 1.8055645753629515, total energy = -52.198067047538885

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: -52.198067
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 1.8055645712884143, total energy = -52.19806704753888

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: -52.198067
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 1.8055645763757655, total energy = -52.19806704753887

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: -52.198067
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 1.8055645688669766, total energy = -52.19806704753888

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: -52.198067
         Iterations: 32
         Function evaluations: 69
Results for this minimization:
  a = 1.8055645707063381, total energy = -52.19806704753888

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: -52.198067
         Iterations: 31
         Function evaluations: 65
Results for this minimization:
  a = 1.8055645722895863, total energy = -52.198067047538885

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: -52.198067
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 1.8055645641870797, total energy = -52.19806704753887

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: -52.198067
         Iterations: 33
         Function evaluations: 69
Results for this minimization:
  a = 1.8055645704269412, total energy = -52.19806704753887

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: -52.198067
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 1.8055645674467082, total energy = -52.19806704753887

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: -52.198067
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 1.8055645795539015, total energy = -52.19806704753887

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: -52.198067
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 1.8055645731743428, total energy = -52.19806704753889

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: -52.198067
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 1.8055645674467087, total energy = -52.19806704753886

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: -52.198067
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 1.8055645722895854, total energy = -52.19806704753888

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: -52.198067
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 1.8055645726621135, total energy = -52.19806704753888

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: -52.198067
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 1.8055645786225782, total energy = -52.19806704753886

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: -52.198067
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 1.805564568936822, total energy = -52.19806704753886

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: -52.198067
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 1.8055645673302934, total energy = -52.19806704753887

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 = [1.80556457] Angstroms and c = 2.3587796795048868 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 79
         Function evaluations: 159
Results for this minimization:
  a = 1.8116261760847423, c = 2.928403177729539, total energy = -52.201457124876974

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 2.506203409473942 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 67
         Function evaluations: 144
Results for this minimization:
  a = 1.811626164417487, c = 2.9284031865171403, total energy = -52.201457124876974

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 2.6536271394429973 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 76
         Function evaluations: 162
Results for this minimization:
  a = 1.811626174449827, c = 2.928403173137216, total energy = -52.201457124876974

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 2.8010508694120526 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 67
         Function evaluations: 146
Results for this minimization:
  a = 1.811626194122773, c = 2.9284031490931, total energy = -52.20145712487696

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 2.948474599381108 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 69
         Function evaluations: 151
Results for this minimization:
  a = 1.811626187787967, c = 2.9284031557160954, total energy = -52.20145712487697

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 3.095898329350163 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 67
         Function evaluations: 142
Results for this minimization:
  a = 1.8116261686516553, c = 2.928403218955718, total energy = -52.20145712487695

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 3.2433220593192185 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 68
         Function evaluations: 148
Results for this minimization:
  a = 1.8116261882927347, c = 2.928403134763581, total energy = -52.20145712487697

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 3.3907457892882737 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 69
         Function evaluations: 150
Results for this minimization:
  a = 1.8116261645137484, c = 2.9284031793297465, total energy = -52.20145712487695

Attempting to perform relaxation using initial lattice constant guess of a = [1.80556457] Angstroms and c = 3.538169519257329 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -52.201457
         Iterations: 68
         Function evaluations: 148
Results for this minimization:
  a = 1.8116261785964862, c = 2.928403144199824, total energy = -52.20145712487697

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

 Final lattice Constants:
   a = 1.8116261760847423 Angstroms, c = 2.928403177729539 Angstroms, c/a = 1.616450

 Total energy: -52.201457124876974 eV

 Cohesive energy: -13.050364281219244 eV/atom

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