Element = Lattice = Model = Element: Si
Lattice: hcp
Model: SW_HauchHollandMarder_1999Brittle_Si__MO_119167353542_004
Computed model cutoff of 3.717053969502455 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: -10.121702
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 3.0593001440167473, total energy = -10.121702271820446

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: -10.121702
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 3.059300141700078, total energy = -10.121702271820443

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: -10.121702
         Iterations: 39
         Function evaluations: 81
Results for this minimization:
  a = 3.0593001400120556, total energy = -10.121702271820443

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: -10.121702
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.0593001430854274, total energy = -10.121702271820435

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: -10.121702
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 3.059300145227466, total energy = -10.121702271820439

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: -10.121702
         Iterations: 40
         Function evaluations: 82
Results for this minimization:
  a = 3.0593001465313154, total energy = -10.121702271820439

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: -10.121702
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 3.0593001421540977, total energy = -10.121702271820444

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: -10.121702
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 3.0593001436209306, total energy = -10.121702271820443

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: -10.121702
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 3.0593001425266295, total energy = -10.121702271820444

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: -10.121702
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.0593001407687574, total energy = -10.121702271820444

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: -10.121702
         Iterations: 37
         Function evaluations: 76
Results for this minimization:
  a = 3.0593001449480672, total energy = -10.121702271820446

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: -10.121702
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 3.059300136566161, total energy = -10.121702271820434

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: -10.121702
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 3.059300139080733, total energy = -10.121702271820439

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: -10.121702
         Iterations: 35
         Function evaluations: 72
Results for this minimization:
  a = 3.0593001436209324, total energy = -10.121702271820451

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: -10.121702
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 3.0593001471832393, total energy = -10.121702271820448

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: -10.121702
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 3.059300146030727, total energy = -10.121702271820446

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: -10.121702
         Iterations: 32
         Function evaluations: 69
Results for this minimization:
  a = 3.0593001443892716, total energy = -10.121702271820446

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: -10.121702
         Iterations: 32
         Function evaluations: 67
Results for this minimization:
  a = 3.0593001408851705, total energy = -10.121702271820443

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: -10.121702
         Iterations: 33
         Function evaluations: 69
Results for this minimization:
  a = 3.0593001453205946, total energy = -10.121702271820439

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: -10.121702
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 3.0593001473578623, total energy = -10.12170227182044

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: -10.121702
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 3.059300142480061, total energy = -10.121702271820448

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: -10.121702
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 3.059300140012055, total energy = -10.121702271820443

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: -10.121702
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 3.059300141700078, total energy = -10.121702271820443

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


Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 3.996652971677108 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.689784
         Iterations: 75
         Function evaluations: 158
Results for this minimization:
  a = 3.855722584834877, c = 3.3683715332650124, total energy = -11.689783740232999

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 4.246443782406928 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.689784
         Iterations: 75
         Function evaluations: 154
Results for this minimization:
  a = 3.8557225909361934, c = 3.368371525316161, total energy = -11.689783740233

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 4.496234593136748 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.121702
         Iterations: 68
         Function evaluations: 147
Results for this minimization:
  a = 3.0593001488522003, c = 4.995816216400389, total energy = -10.121702271820444

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 4.746025403866567 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.121702
         Iterations: 63
         Function evaluations: 138
Results for this minimization:
  a = 3.059300130281116, c = 4.995816254328473, total energy = -10.121702271820443

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 4.9958162145963865 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.121702
         Iterations: 67
         Function evaluations: 141
Results for this minimization:
  a = 3.0593001299108096, c = 4.995816235634654, total energy = -10.121702271820439

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 5.245607025326207 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.121702
         Iterations: 71
         Function evaluations: 152
Results for this minimization:
  a = 3.059300141191457, c = 4.995816223781369, total energy = -10.121702271820448

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 5.495397836056027 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.121702
         Iterations: 73
         Function evaluations: 151
Results for this minimization:
  a = 3.0593001438026737, c = 4.9958162102605135, total energy = -10.121702271820448

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 5.745188646785846 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.121702
         Iterations: 80
         Function evaluations: 166
Results for this minimization:
  a = 3.0593001430183535, c = 4.9958162211185915, total energy = -10.121702271820446

Attempting to perform relaxation using initial lattice constant guess of a = [3.05930014] Angstroms and c = 5.994979457515665 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -10.121702
         Iterations: 73
         Function evaluations: 156
Results for this minimization:
  a = 3.0593001424953536, c = 4.995816218702656, total energy = -10.12170227182045