Element = Lattice = Model = Element: Al
Lattice: hcp
Model: Morse_Shifted_GirifalcoWeizer_1959MedCutoff_Al__MO_279544746097_003
Computed model cutoff of 9.77940999358893 Angstroms
Computed isolated atomic energy of 0.0 eV for species Al

==============================================================================
==============================================================================
 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: -11.551331
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8552175849676162, total energy = -11.551331321226955

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: -11.551331
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 2.8552175853867077, total energy = -11.551331321226943

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: -11.551331
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.8552175872027874, total energy = -11.55133132122695

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: -11.551331
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8552176123950694, total energy = -11.551331321226925

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: -11.551331
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8552175547229153, total energy = -11.551331321226955

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: -11.551331
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8552175852702946, total energy = -11.551331321226964

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: -11.551331
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.8552175730466836, total energy = -11.55133132122696

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: -11.551331
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8552175872027874, total energy = -11.551331321226954

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: -11.551331
         Iterations: 35
         Function evaluations: 72
Results for this minimization:
  a = 2.855217573046686, total energy = -11.551331321226943

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: -11.551331
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.855217570811511, total energy = -11.551331321226927

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: -11.551331
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.8552175883203748, total energy = -11.55133132122694

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: -11.551331
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.855217629065736, total energy = -11.551331321226916

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: -11.551331
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.8552175872027874, total energy = -11.551331321226957

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: -11.551331
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 2.8552176407858503, total energy = -11.551331321226932

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: -11.551331
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.8552175678312786, total energy = -11.551331321226911

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: -11.551331
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.8552176329074435, total energy = -11.55133132122696

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: -11.551331
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.8552175492048257, total energy = -11.551331321226932

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: -11.551331
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.8552176427911036, total energy = -11.55133132122691

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: -11.551331
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.8552175873890517, total energy = -11.551331321226938

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: -11.551331
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 2.8552175841032286, total energy = -11.551331321226957

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: -11.551331
         Iterations: 37
         Function evaluations: 83
Results for this minimization:
  a = 2.8552176434546688, total energy = -11.551331321226936

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: -11.551331
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.855217595677821, total energy = -11.551331321226954

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: -11.551331
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.8552175872027874, total energy = -11.551331321226954

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: -11.551331
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.8552175918593976, total energy = -11.551331321226938

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: -11.551331
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.855217566341161, total energy = -11.551331321226904

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: -11.551331
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8552175885124607, total energy = -11.551331321226968

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: -11.551331
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8552175843680723, total energy = -11.551331321226941

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: -11.551331
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.855217570438981, total energy = -11.551331321226938

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: -11.551331
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8552175883203703, total energy = -11.551331321226929

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: -11.551331
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.855217585992067, total energy = -11.551331321226979

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: -11.551331
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.8552176285127655, total energy = -11.551331321226955

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: -11.551331
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8552175777032947, total energy = -11.551331321226959

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: -11.551331
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8552175872027874, total energy = -11.551331321226948

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: -11.551331
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8552175868768206, total energy = -11.55133132122697

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: -11.551331
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.855217640785848, total energy = -11.55133132122694

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: -11.551331
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8552175840362923, total energy = -11.551331321226952

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: -11.551331
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.855217604711649, total energy = -11.551331321226957

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: -11.551331
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.85521760256961, total energy = -11.551331321226915

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: -11.551331
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8552176430821365, total energy = -11.551331321226904

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: -11.551331
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8552176323253646, total energy = -11.551331321226918

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: -11.551331
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.855217610672108, total energy = -11.551331321226929

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: -11.551331
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.855217601731416, total energy = -11.551331321226936

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: -11.551331
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 2.8552176436642185, total energy = -11.551331321226906

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: -11.551331
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.8552175593329583, total energy = -11.551331321226925

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: -11.551331
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.855217587389046, total energy = -11.551331321226941

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: -11.551331
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.855217612053085, total energy = -11.551331321226957

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: -11.551331
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 2.855217607598748, total energy = -11.551331321226934

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: -11.551331
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 2.8552176373341354, total energy = -11.55133132122694

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: -11.551331
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.855217573046682, total energy = -11.551331321226947

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: -11.551331
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.8552175730495883, total energy = -11.55133132122697

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: -11.551331
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.85521758622489, total energy = -11.551331321226925

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: -11.551331
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 2.855217620061008, total energy = -11.551331321226941

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: -11.551331
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 2.8552175865042955, total energy = -11.551331321226952

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: -11.551331
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.8552175495598973, total energy = -11.551331321226924

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: -11.551331
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 2.855217589333175, total energy = -11.551331321226924

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: -11.551331
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 2.8552175987977444, total energy = -11.551331321226966

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: -11.551331
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 2.855217611975963, total energy = -11.551331321226913

Attempting to perform relaxation using initial lattice constant guess of a = 8.125 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 = 8.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.8125 Angstroms and c = -1.3268069440075547 Angstroms; the model cutoff was estimated to be 9.77940999358893 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 = 8.25 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 9.77940999358893 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 = [2.85521759] Angstroms and c = 3.7300406348275814 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 78
         Function evaluations: 162
Results for this minimization:
  a = 2.855449214293583, c = 4.661794289607458, total energy = -11.551332416001793

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 3.9631681745043053 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 70
         Function evaluations: 146
Results for this minimization:
  a = 2.855449197212999, c = 4.66179420646508, total energy = -11.551332416001802

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 4.196295714181029 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 71
         Function evaluations: 150
Results for this minimization:
  a = 2.8554491535123097, c = 4.661794274514397, total energy = -11.551332416001793

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 4.4294232538577525 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 68
         Function evaluations: 140
Results for this minimization:
  a = 2.855449169296439, c = 4.661794271708667, total energy = -11.551332416001806

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 4.662550793534477 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 69
         Function evaluations: 144
Results for this minimization:
  a = 2.8554492075395608, c = 4.661794146838961, total energy = -11.551332416001824

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 4.895678333211201 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 73
         Function evaluations: 158
Results for this minimization:
  a = 2.8554492037248576, c = 4.661794269184279, total energy = -11.551332416001818

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 5.1288058728879244 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 74
         Function evaluations: 157
Results for this minimization:
  a = 2.855449222405362, c = 4.661794221465923, total energy = -11.551332416001806

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 5.361933412564648 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 74
         Function evaluations: 162
Results for this minimization:
  a = 2.8554491796228048, c = 4.661794315134371, total energy = -11.55133241600183

Attempting to perform relaxation using initial lattice constant guess of a = [2.85521759] Angstroms and c = 5.595060952241372 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -11.551332
         Iterations: 68
         Function evaluations: 151
Results for this minimization:
  a = 2.855449197769564, c = 4.661794250619896, total energy = -11.55133241600183

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

 Final lattice Constants:
   a = 2.8554491796228048 Angstroms, c = 4.661794315134371 Angstroms, c/a = 1.632596

 Total energy: -11.55133241600183 eV

 Cohesive energy: -2.8878331040004577 eV/atom

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