Element = Lattice = Model = Element: Ag
Lattice: hcp
Model: Morse_Shifted_GirifalcoWeizer_1959HighCutoff_Ag__MO_111986436268_004
Computed model cutoff of 10.349099996387991 Angstroms
Computed isolated atomic energy of 0.0 eV for species Ag

==============================================================================
==============================================================================
 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))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.0 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.0 Angstroms and c = 1.632993161855452 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


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: -12.017843
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.880110254883766, total energy = -12.017843014145416

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: -12.017843
         Iterations: 39
         Function evaluations: 86
Results for this minimization:
  a = 2.8801102489233017, total energy = -12.017843014145459

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: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.880110306106515, total energy = -12.017843014145441

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: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102453842797, total energy = -12.01784301414543

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: -12.017843
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8801102653145803, total energy = -12.017843014145422

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: -12.017843
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 2.8801102489233026, total energy = -12.017843014145457

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: -12.017843
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.8801102861762047, total energy = -12.017843014145438

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: -12.017843
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.880110276117924, total energy = -12.017843014145473

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: -12.017843
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.8801102630794055, total energy = -12.017843014145459

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: -12.017843
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.880110256769695, total energy = -12.017843014145415

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: -12.017843
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 2.880110228667035, total energy = -12.017843014145447

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: -12.017843
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 2.8801102489233017, total energy = -12.017843014145445

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: -12.017843
         Iterations: 33
         Function evaluations: 74
Results for this minimization:
  a = 2.8801102598430592, total energy = -12.017843014145502

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: -12.017843
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 2.880110258981586, total energy = -12.017843014145459

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: -12.017843
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 2.880110285946285, total energy = -12.017843014145495

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: -12.017843
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.8801102634053684, total energy = -12.017843014145475

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: -12.017843
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 2.8801102354191244, total energy = -12.017843014145456

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: -12.017843
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.8801102653145785, total energy = -12.017843014145411

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: -12.017843
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.880110293440521, total energy = -12.017843014145468

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: -12.017843
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.8801102489233017, total energy = -12.017843014145429

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: -12.017843
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.880110287340356, total energy = -12.017843014145463

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: -12.017843
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.8801102861762047, total energy = -12.017843014145429

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: -12.017843
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.880110263172535, total energy = -12.017843014145418

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: -12.017843
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8801102761179207, total energy = -12.017843014145464

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: -12.017843
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8801102827361325, total energy = -12.017843014145434

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: -12.017843
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.8801102626835897, total energy = -12.017843014145459

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: -12.017843
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8801102489233017, total energy = -12.017843014145432

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: -12.017843
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8801102557219527, total energy = -12.017843014145413

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: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.880110303871333, total energy = -12.017843014145415

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: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102286670375, total energy = -12.017843014145452

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: -12.017843
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.8801102457160566, total energy = -12.017843014145456

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: -12.017843
         Iterations: 38
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102489233017, total energy = -12.017843014145429

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: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102899422357, total energy = -12.017843014145447

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: -12.017843
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.8801102598430575, total energy = -12.017843014145488

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: -12.017843
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.880110246315601, total energy = -12.017843014145432

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: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.880110239004713, total energy = -12.017843014145445

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: -12.017843
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.8801103001460433, total energy = -12.017843014145418

Attempting to perform relaxation using initial lattice constant guess of a = 5.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102859462797, total energy = -12.017843014145488

Attempting to perform relaxation using initial lattice constant guess of a = 5.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.880110293440519, total energy = -12.017843014145473

Attempting to perform relaxation using initial lattice constant guess of a = 6.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102634053612, total energy = -12.017843014145457

Attempting to perform relaxation using initial lattice constant guess of a = 6.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8801102387777027, total energy = -12.017843014145406

Attempting to perform relaxation using initial lattice constant guess of a = 6.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 2.880110307596624, total energy = -12.017843014145418

Attempting to perform relaxation using initial lattice constant guess of a = 6.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8801102599129065, total energy = -12.017843014145434

Attempting to perform relaxation using initial lattice constant guess of a = 6.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.880110265314573, total energy = -12.017843014145413

Attempting to perform relaxation using initial lattice constant guess of a = 6.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.880110276350744, total energy = -12.01784301414545

Attempting to perform relaxation using initial lattice constant guess of a = 6.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 2.8801102821249485, total energy = -12.017843014145416

Attempting to perform relaxation using initial lattice constant guess of a = 6.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 2.880110286321724, total energy = -12.017843014145448

Attempting to perform relaxation using initial lattice constant guess of a = 7.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8801102489233, total energy = -12.01784301414543

Attempting to perform relaxation using initial lattice constant guess of a = 7.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.8801102861761976, total energy = -12.017843014145445

Attempting to perform relaxation using initial lattice constant guess of a = 7.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.8801102589815772, total energy = -12.017843014145484

Attempting to perform relaxation using initial lattice constant guess of a = 7.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102908037097, total energy = -12.017843014145473

Attempting to perform relaxation using initial lattice constant guess of a = 7.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8801102861762047, total energy = -12.017843014145429

Attempting to perform relaxation using initial lattice constant guess of a = 7.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 2.880110289693407, total energy = -12.01784301414549

Attempting to perform relaxation using initial lattice constant guess of a = 7.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.8801102638942995, total energy = -12.017843014145438

Attempting to perform relaxation using initial lattice constant guess of a = 7.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 2.880110242729997, total energy = -12.017843014145418

Attempting to perform relaxation using initial lattice constant guess of a = 8.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8801102761179167, total energy = -12.017843014145452

Attempting to perform relaxation using initial lattice constant guess of a = 8.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 2.880110287864227, total energy = -12.017843014145445

Attempting to perform relaxation using initial lattice constant guess of a = 8.25 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 8.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.8249999999999922 Angstroms and c = -1.3472193585307353 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 8.375 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 8.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.8375000000000234 Angstroms and c = -1.3676317730539793 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 8.5 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 8.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.8500000000000156 Angstroms and c = -1.3880441875771599 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 8.625 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 8.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.8625000000000078 Angstroms and c = -1.4084566021003402 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 8.75 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 8.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.875 Angstroms and c = -1.4288690166235205 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 8.875 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 8.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.8874999999999922 Angstroms and c = -1.449281431146701 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.0 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9000000000000234 Angstroms and c = -1.469693845669945 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.125 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9125000000000156 Angstroms and c = -1.4901062601931256 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.25 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9250000000000078 Angstroms and c = -1.510518674716306 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.375 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9375 Angstroms and c = -1.5309310892394863 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.5 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9499999999999922 Angstroms and c = -1.5513435037626666 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.625 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9625000000000234 Angstroms and c = -1.5717559182859109 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.75 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9750000000000156 Angstroms and c = -1.5921683328090912 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 9.875 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 9.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.9875000000000078 Angstroms and c = -1.6125807473322717 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 10.0 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 10.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.0 Angstroms and c = -1.632993161855452 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 10.125 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 10.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.0124999999999922 Angstroms and c = -1.6534055763786324 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 10.25 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 10.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.0250000000000234 Angstroms and c = -1.6738179909018767 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 10.375 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 10.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.0375000000000156 Angstroms and c = -1.694230405425057 Angstroms; the model cutoff was estimated to be 10.349099996387991 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


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


Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 3.7625602877707562 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 70
         Function evaluations: 152
Results for this minimization:
  a = 2.8802344361360674, c = 4.702795330271149, total energy = -12.017843437036298

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 3.9977203057564283 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 67
         Function evaluations: 151
Results for this minimization:
  a = 2.8802344386220486, c = 4.702795264692067, total energy = -12.017843437036257

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 4.2328803237421 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 74
         Function evaluations: 158
Results for this minimization:
  a = 2.88023442873048, c = 4.702795370130357, total energy = -12.017843437036301

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 4.4680403417277725 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 67
         Function evaluations: 143
Results for this minimization:
  a = 2.880234384998556, c = 4.702795404744622, total energy = -12.017843437036344

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 4.703200359713445 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 68
         Function evaluations: 141
Results for this minimization:
  a = 2.8802344387224075, c = 4.702795284165131, total energy = -12.017843437036284

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 4.938360377699117 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 73
         Function evaluations: 156
Results for this minimization:
  a = 2.8802343949565365, c = 4.702795398036441, total energy = -12.017843437036298

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 5.173520395684789 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 65
         Function evaluations: 144
Results for this minimization:
  a = 2.8802344021882385, c = 4.702795433970606, total energy = -12.017843437036282

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 5.408680413670461 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 68
         Function evaluations: 150
Results for this minimization:
  a = 2.8802344673785774, c = 4.702795269667549, total energy = -12.017843437036282

Attempting to perform relaxation using initial lattice constant guess of a = [2.88011026] Angstroms and c = 5.643840431656133 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -12.017843
         Iterations: 77
         Function evaluations: 161
Results for this minimization:
  a = 2.880234461556042, c = 4.7027953973611005, total energy = -12.017843437036243

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

 Final lattice Constants:
   a = 2.880234384998556 Angstroms, c = 4.702795404744622 Angstroms, c/a = 1.632782

 Total energy: -12.017843437036344 eV

 Cohesive energy: -3.004460859259086 eV/atom

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