Element = Lattice = Model = Element: Si
Lattice: hcp
Model: MEAM_LAMMPS_LenoskySadighAlonso_2000_Si__MO_533426548156_000
Computed model cutoff of 4.499999959208102 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: -15.684015
         Iterations: 42
         Function evaluations: 86
Results for this minimization:
  a = 2.8314971289597497, total energy = -15.684014704273384

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: -15.684015
         Iterations: 42
         Function evaluations: 88
Results for this minimization:
  a = 2.8314971304964285, total energy = -15.684014704273379

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: -15.684015
         Iterations: 41
         Function evaluations: 84
Results for this minimization:
  a = 2.8314971299842, total energy = -15.684014704273388

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: -15.684015
         Iterations: 39
         Function evaluations: 79
Results for this minimization:
  a = 2.831497130059877, total energy = -15.684014704273382

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: -15.684015
         Iterations: 44
         Function evaluations: 91
Results for this minimization:
  a = 2.8314971290994473, total energy = -15.684014704273388

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: -15.684015
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 2.8314971279352914, total energy = -15.684014704273382

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: -15.684015
         Iterations: 39
         Function evaluations: 81
Results for this minimization:
  a = 2.831497126910836, total energy = -15.684014704273377

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: -15.684015
         Iterations: 37
         Function evaluations: 75
Results for this minimization:
  a = 2.8314971305662766, total energy = -15.684014704273377

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: -15.684015
         Iterations: 39
         Function evaluations: 79
Results for this minimization:
  a = 2.8314971279352927, total energy = -15.68401470427338

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: -15.684015
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.8314971290994433, total energy = -15.68401470427338

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: -15.684015
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.831497130496429, total energy = -15.68401470427338

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: -15.684015
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8314971313578985, total energy = -15.684014704273377

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: -15.684015
         Iterations: 35
         Function evaluations: 72
Results for this minimization:
  a = 2.8314971299842, total energy = -15.68401470427338

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: -15.684015
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.8314971304353085, total energy = -15.684014704273379

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: -15.684015
         Iterations: 33
         Function evaluations: 67
Results for this minimization:
  a = 2.831497129547642, total energy = -15.684014704273386

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: -15.684015
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 2.83149712816812, total energy = -15.684014704273382

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: -15.684015
         Iterations: 35
         Function evaluations: 71
Results for this minimization:
  a = 2.831497128959745, total energy = -15.684014704273388

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: -15.684015
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.831497128936462, total energy = -15.684014704273375

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: -15.684015
         Iterations: 36
         Function evaluations: 74
Results for this minimization:
  a = 2.8314971279352896, total energy = -15.684014704273382

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: -15.684015
         Iterations: 35
         Function evaluations: 71
Results for this minimization:
  a = 2.8314971304178473, total energy = -15.684014704273382

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: -15.684015
         Iterations: 36
         Function evaluations: 74
Results for this minimization:
  a = 2.831497129029592, total energy = -15.684014704273388

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: -0.446214
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 3.8936046123504644, total energy = -0.44621412133749155

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: -0.446214
         Iterations: 32
         Function evaluations: 70
Results for this minimization:
  a = 3.8936046101152897, total energy = -0.44621412133749155

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: -0.446214
         Iterations: 32
         Function evaluations: 70
Results for this minimization:
  a = 3.893604610860348, total energy = -0.44621412133749155

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: -0.446214
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 3.8936046123504644, total energy = -0.44621412133749155

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: -0.446214
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 3.893604616820812, total energy = -0.44621412133749155

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: -15.684015
         Iterations: 38
         Function evaluations: 78
Results for this minimization:
  a = 2.8314971290994397, total energy = -15.68401470427338

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: -15.684015
         Iterations: 39
         Function evaluations: 80
Results for this minimization:
  a = 2.8314971272775438, total energy = -15.684014704273373

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: 0.000000
         Iterations: 33
         Function evaluations: 97
Results for this minimization:
  a = 4.7250000000000005, total energy = 0.0

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


Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 3.6990523608620296 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.260569
         Iterations: 75
         Function evaluations: 161
Results for this minimization:
  a = 3.077144668682849, c = 3.3968995919917777, total energy = -17.260568824804874

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 3.9302431334159063 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.260569
         Iterations: 76
         Function evaluations: 154
Results for this minimization:
  a = 3.0771446731073793, c = 3.396899560919768, total energy = -17.260568824804864

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 4.161433905969783 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -18.144794
         Iterations: 87
         Function evaluations: 178
Results for this minimization:
  a = 3.4819214428522067, c = 2.6324721091891954, total energy = -18.144794384311282

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 4.39262467852366 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -18.144794
         Iterations: 84
         Function evaluations: 177
Results for this minimization:
  a = 3.4819214727653476, c = 2.632472095072531, total energy = -18.144794384311272

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 4.623815451077537 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -18.144794
         Iterations: 104
         Function evaluations: 212
Results for this minimization:
  a = 3.4819214585314597, c = 2.6324721114541716, total energy = -18.14479438431128

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 4.855006223631413 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.761742
         Iterations: 69
         Function evaluations: 154
Results for this minimization:
  a = 2.589564920781079, c = 5.290923441586228, total energy = -15.761741869217813

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 5.08619699618529 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.761742
         Iterations: 76
         Function evaluations: 162
Results for this minimization:
  a = 2.5895649414219504, c = 5.290923391008217, total energy = -15.76174186921781

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 5.317387768739167 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.761742
         Iterations: 79
         Function evaluations: 168
Results for this minimization:
  a = 2.589564933176063, c = 5.290923415028485, total energy = -15.761741869217808

Attempting to perform relaxation using initial lattice constant guess of a = [2.83149713] Angstroms and c = 5.548578541293043 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -18.144794
         Iterations: 87
         Function evaluations: 170
Results for this minimization:
  a = 3.481921453229492, c = 2.632472104676835, total energy = -18.144794384311282

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

 Final lattice Constants:
   a = 3.4819214428522067 Angstroms, c = 2.6324721091891954 Angstroms, c/a = 0.756040

 Total energy: -18.144794384311282 eV

 Cohesive energy: -4.536198596077821 eV/atom

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