Element = Lattice = Model = Element: Zn
Lattice: hcp
Model: LJ_ElliottAkerson_2015_Universal__MO_959249795837_003
Computed model cutoff of 8.69516999930146 Angstroms
Computed isolated atomic energy of 0.0 eV for species Zn

==============================================================================
==============================================================================
 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: -6.380073
         Iterations: 39
         Function evaluations: 81
Results for this minimization:
  a = 2.3730667479336294, total energy = -6.380073213613128

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: -6.380073
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.37306677531451, total energy = -6.380073213613138

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: -6.380073
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.373066771775484, total energy = -6.380073213613131

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: -6.380073
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.3730667687952556, total energy = -6.380073213613128

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: -6.380073
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.373066767910497, total energy = -6.380073213613128

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: -6.380073
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.373066762182863, total energy = -6.380073213613127

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: -6.380073
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.373066770657897, total energy = -6.380073213613124

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: -6.380073
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 2.373066767177079, total energy = -6.380073213613144

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: -6.380073
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 2.373066771775486, total energy = -6.380073213613131

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: -6.380073
         Iterations: 32
         Function evaluations: 69
Results for this minimization:
  a = 2.3730667889583863, total energy = -6.38007321361312

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: -6.380073
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.373066757712514, total energy = -6.380073213613103

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: -6.380073
         Iterations: 32
         Function evaluations: 70
Results for this minimization:
  a = 2.373066771775484, total energy = -6.380073213613134

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: -6.380073
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.373066771775484, total energy = -6.380073213613133

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: -6.380073
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 2.373066764138639, total energy = -6.380073213613149

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: -6.380073
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.373066768795251, total energy = -6.3800732136131515

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: -6.380073
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.3730667639814778, total energy = -6.380073213613132

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: -6.380073
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.3730667679104935, total energy = -6.380073213613123

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: -6.380073
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.373066763393581, total energy = -6.380073213613114

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: -6.380073
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.3730667621828605, total energy = -6.380073213613121

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: -6.380073
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.3730667853727927, total energy = -6.380073213613109

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: -6.380073
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.373066769354045, total energy = -6.380073213613125

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: -6.380073
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.373066772794115, total energy = -6.38007321361314

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: -6.380073
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.373066767177079, total energy = -6.380073213613148

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: -6.380073
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.373066757386547, total energy = -6.380073213613112

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: -6.380073
         Iterations: 37
         Function evaluations: 76
Results for this minimization:
  a = 2.373066771775483, total energy = -6.380073213613142

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: -6.380073
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.373066764697435, total energy = -6.380073213613101

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: -6.380073
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.3730667889583827, total energy = -6.38007321361312

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: -6.380073
         Iterations: 39
         Function evaluations: 86
Results for this minimization:
  a = 2.3730667827185243, total energy = -6.380073213613128

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: -6.380073
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.3730667753145056, total energy = -6.380073213613132

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: -6.380073
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.373066754452882, total energy = -6.380073213613142

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: -6.380073
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 2.373066775314512, total energy = -6.38007321361313

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: -6.380073
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.3730667440220676, total energy = -6.380073213613099

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: -6.380073
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.373066771775484, total energy = -6.380073213613135

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: -6.380073
         Iterations: 40
         Function evaluations: 83
Results for this minimization:
  a = 2.3730667590949395, total energy = -6.380073213613114

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: -6.380073
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.3730667641386374, total energy = -6.380073213613148

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: -6.380073
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.373066765011756, total energy = -6.380073213613131

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: -6.380073
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.3730667687952476, total energy = -6.380073213613149

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: -6.380073
         Iterations: 39
         Function evaluations: 86
Results for this minimization:
  a = 2.373066786210984, total energy = -6.380073213613121

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: -6.380073
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 2.3730667639814724, total energy = -6.38007321361312

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: -6.380073
         Iterations: 40
         Function evaluations: 83
Results for this minimization:
  a = 2.3730667645111656, total energy = -6.380073213613114

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: -6.380073
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.3730667591094883, total energy = -6.380073213613124

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: -6.380073
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.3730667810887054, total energy = -6.380073213613109

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: -6.380073
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.373066768050194, total energy = -6.380073213613116

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: -6.380073
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.373066788166759, total energy = -6.380073213613089

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: -6.380073
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 2.3730667555238982, total energy = -6.380073213613114

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: -6.380073
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 2.373066777491467, total energy = -6.3800732136131195

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: -6.380073
         Iterations: 40
         Function evaluations: 82
Results for this minimization:
  a = 2.373066785372789, total energy = -6.3800732136131115

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: -6.380073
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.373066786210984, total energy = -6.38007321361312

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: -6.380073
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 2.3730667693540433, total energy = -6.3800732136131275

Attempting to perform relaxation using initial lattice constant guess of a = 7.125 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 = 7.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.7125000000000128 Angstroms and c = -1.1635076278220304 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 7.25 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 = 7.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.7250000000000156 Angstroms and c = -1.1839200423452283 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 7.375 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 = 7.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.7375000000000078 Angstroms and c = -1.2043324568684086 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 7.5 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 = 7.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.75 Angstroms and c = -1.224744871391589 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 7.625 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 = 7.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.7624999999999922 Angstroms and c = -1.2451572859147695 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 7.75 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 = 7.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.7750000000000234 Angstroms and c = -1.2655697004380135 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 7.875 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 = 7.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.7875000000000156 Angstroms and c = -1.285982114961194 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 8.0 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 = 8.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -0.8000000000000078 Angstroms and c = -1.3063945294843744 Angstroms; the model cutoff was estimated to be 8.69516999930146 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 = 8.125 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 8.69516999930146 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 8.69516999930146 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 8.69516999930146 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 8.69516999930146 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 8.69516999930146 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 8.69516999930146 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 = [2.37306677] Angstroms and c = 3.100161444855247 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 75
         Function evaluations: 158
Results for this minimization:
  a = 2.3730509519996312, c = 3.8752533418846626, total energy = -6.380073224603849

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 3.2939215351586997 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 70
         Function evaluations: 151
Results for this minimization:
  a = 2.373050998373442, c = 3.8752533111520475, total energy = -6.380073224603853

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 3.4876816254621525 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 66
         Function evaluations: 147
Results for this minimization:
  a = 2.373050970570641, c = 3.875253327836229, total energy = -6.380073224603852

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 3.6814417157656054 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 68
         Function evaluations: 149
Results for this minimization:
  a = 2.373050965324858, c = 3.875253402839668, total energy = -6.380073224603866

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 3.8752018060690583 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 68
         Function evaluations: 145
Results for this minimization:
  a = 2.3730509845304883, c = 3.875253322959656, total energy = -6.380073224603871

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 4.068961896372511 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 73
         Function evaluations: 155
Results for this minimization:
  a = 2.373050989264885, c = 3.8752533539275125, total energy = -6.3800732246038505

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 4.262721986675964 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 70
         Function evaluations: 149
Results for this minimization:
  a = 2.373050992174046, c = 3.8752533488043466, total energy = -6.380073224603865

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 4.456482076979417 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 71
         Function evaluations: 154
Results for this minimization:
  a = 2.3730509988474884, c = 3.875253283234813, total energy = -6.380073224603844

Attempting to perform relaxation using initial lattice constant guess of a = [2.37306677] Angstroms and c = 4.65024216728287 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.380073
         Iterations: 72
         Function evaluations: 153
Results for this minimization:
  a = 2.3730509957361425, c = 3.875253341329916, total energy = -6.380073224603847

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

 Final lattice Constants:
   a = 2.3730509845304883 Angstroms, c = 3.875253322959656 Angstroms, c/a = 1.633026

 Total energy: -6.380073224603871 eV

 Cohesive energy: -1.5950183061509677 eV/atom

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