Element = Lattice = Model = Element: Na
Lattice: hcp
Model: EAM_Dynamo_NicholAckland_2016_Na__MO_048172193005_000
Computed model cutoff of 5.577301917672165 Angstroms
Computed isolated atomic energy of 0.0 eV for species Na

==============================================================================
==============================================================================
 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: -4.448937
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 3.939000993967063, total energy = -4.448937171256227

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: -4.448937
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.9390009448863545, total energy = -4.448937171256227

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: -4.448937
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 3.9390009362250566, total energy = -4.44893717125623

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: -4.448937
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 3.93900093957783, total energy = -4.448937171256231

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: -4.448937
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.939000946283346, total energy = -4.448937171256228

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: -4.448937
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 3.9390009371331, total energy = -4.448937171256231

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: -4.448937
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.939000918995589, total energy = -4.448937171256225

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: -4.448937
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.939000951591879, total energy = -4.44893717125623

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: -4.448937
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 3.9390009462833455, total energy = -4.44893717125623

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: -4.448937
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.9390009412542004, total energy = -4.448937171256229

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: -4.448937
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 3.939000911358744, total energy = -4.448937171256223

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: -4.448937
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 3.939000928401943, total energy = -4.448937171256226

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: -4.448937
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 3.9390009525232017, total energy = -4.448937171256227

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: -4.448937
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.9390009726164896, total energy = -4.448937171256224

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: -4.448937
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 3.9390009477734615, total energy = -4.448937171256231

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: -4.448937
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.939000904653221, total energy = -4.448937171256225

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: -4.448937
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.9390009462833433, total energy = -4.448937171256227

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: -4.448937
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 3.9390009170165285, total energy = -4.44893717125623

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: -4.448937
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 3.939000936830418, total energy = -4.448937171256233

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: -4.448937
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.939000944991131, total energy = -4.448937171256226

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: -4.448937
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 3.939000932686031, total energy = -4.448937171256231

Attempting to perform relaxation using initial lattice constant guess of a = 3.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 3.939000945608132, total energy = -4.4489371712562304

Attempting to perform relaxation using initial lattice constant guess of a = 3.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 3.9390009187627584, total energy = -4.448937171256223

Attempting to perform relaxation using initial lattice constant guess of a = 3.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 3.939000948728063, total energy = -4.448937171256233

Attempting to perform relaxation using initial lattice constant guess of a = 4.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 3.939000947028399, total energy = -4.4489371712562304

Attempting to perform relaxation using initial lattice constant guess of a = 4.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 3.939000953407959, total energy = -4.448937171256228

Attempting to perform relaxation using initial lattice constant guess of a = 4.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 3.9390009000897406, total energy = -4.448937171256226

Attempting to perform relaxation using initial lattice constant guess of a = 4.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 36
         Function evaluations: 80
Results for this minimization:
  a = 3.939000935293734, total energy = -4.448937171256223

Attempting to perform relaxation using initial lattice constant guess of a = 4.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 3.9390009448863545, total energy = -4.448937171256225

Attempting to perform relaxation using initial lattice constant guess of a = 4.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 3.939000972791109, total energy = -4.448937171256224

Attempting to perform relaxation using initial lattice constant guess of a = 4.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.9390009319409733, total energy = -4.448937171256229

Attempting to perform relaxation using initial lattice constant guess of a = 4.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.9390009362250558, total energy = -4.448937171256231

Attempting to perform relaxation using initial lattice constant guess of a = 5.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.9390009362250566, total energy = -4.448937171256234

Attempting to perform relaxation using initial lattice constant guess of a = 5.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 3.9390009363181857, total energy = -4.448937171256225

Attempting to perform relaxation using initial lattice constant guess of a = 5.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 37
         Function evaluations: 82
Results for this minimization:
  a = 3.9390009724942496, total energy = -4.448937171256228

Attempting to perform relaxation using initial lattice constant guess of a = 5.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.9390009470516825, total energy = -4.448937171256232

Attempting to perform relaxation using initial lattice constant guess of a = 5.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.9390009397058723, total energy = -4.448937171256229

Attempting to perform relaxation using initial lattice constant guess of a = 5.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.9390009263152024, total energy = -4.4489371712562304

==============================================================================
==============================================================================
 Starting optimization with both a and c/a relaxed
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 5.1458892747181935 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 70
         Function evaluations: 154
Results for this minimization:
  a = 3.939000945513313, c = 6.432361655594882, total energy = -4.448937171256231

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 5.467507354388081 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 69
         Function evaluations: 149
Results for this minimization:
  a = 3.9390009489132085, c = 6.432361639297495, total energy = -4.448937171256231

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 5.7891254340579685 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 73
         Function evaluations: 161
Results for this minimization:
  a = 3.939000976594306, c = 6.432361537727871, total energy = -4.4489371712562304

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 6.110743513727856 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 74
         Function evaluations: 154
Results for this minimization:
  a = 3.939000940740668, c = 6.432361604685019, total energy = -4.44893717125623

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 6.432361593397744 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 64
         Function evaluations: 142
Results for this minimization:
  a = 3.9390009608040097, c = 6.432361593765389, total energy = -4.4489371712562304

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 6.753979673067631 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 71
         Function evaluations: 153
Results for this minimization:
  a = 3.9390009269015476, c = 6.432361724639899, total energy = -4.4489371712562304

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 7.075597752737519 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 71
         Function evaluations: 153
Results for this minimization:
  a = 3.9390009125104104, c = 6.432361626771558, total energy = -4.44893717125623

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 7.397215832407406 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 80
         Function evaluations: 171
Results for this minimization:
  a = 3.9390009780113644, c = 6.432361465144261, total energy = -4.448937171256226

Attempting to perform relaxation using initial lattice constant guess of a = [3.93900094] Angstroms and c = 7.718833912077294 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -4.448937
         Iterations: 76
         Function evaluations: 163
Results for this minimization:
  a = 3.939000974399684, c = 6.432361702408565, total energy = -4.448937171256228

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

 Final lattice Constants:
   a = [3.93900094] Angstroms, c = [6.43236159] Angstroms, c/a = 1.632993

 Total energy: -4.448937171256234 eV

 Cohesive energy: -1.1122342928140585 eV/atom

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