Element = Lattice = Model = Element: Sr
Lattice: hcp
Model: Morse_Shifted_GirifalcoWeizer_1959MedCutoff_Sr__MO_964297938209_004
Computed model cutoff of 15.431900002062333 Angstroms
Computed isolated atomic energy of 0.0 eV for species Sr

==============================================================================
==============================================================================
 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 15.431900002062333 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))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.125 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.125 Angstroms and c = 1.8371173070873836 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 1.25 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 = 1.25 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.25 Angstroms and c = 2.041241452319315 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 1.375 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 = 1.375 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.375 Angstroms and c = 2.2453655975512468 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 1.5 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 = 1.5 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.5 Angstroms and c = 2.449489742783178 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 4.299482766690202, total energy = -6.8401573045071515

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: -6.840157
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.299482682114467, total energy = -6.840157304507155

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: -6.840157
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 4.299482746515423, total energy = -6.840157304507142

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: -6.840157
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 4.29948273710907, total energy = -6.8401573045071276

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: -6.840157
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.299482768774037, total energy = -6.8401573045071276

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.2994826699607085, total energy = -6.840157304507114

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: -6.840157
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 4.299482729984445, total energy = -6.840157304507151

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: -6.840157
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 4.299482749658637, total energy = -6.840157304507158

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: -6.840157
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.299482744699347, total energy = -6.840157304507157

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: -6.840157
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.299482786655433, total energy = -6.84015730450714

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.2994828091003, total energy = -6.8401573045071355

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.299482756573711, total energy = -6.840157304507161

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: -6.840157
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 4.299482750793686, total energy = -6.840157304507144

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: -6.840157
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 4.299482757004444, total energy = -6.840157304507155

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: -6.840157
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.2994827062124426, total energy = -6.84015730450713

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: -6.840157
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 4.2994827352464196, total energy = -6.8401573045071595

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: -6.840157
         Iterations: 35
         Function evaluations: 77
Results for this minimization:
  a = 4.299482757868828, total energy = -6.840157304507127

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: -6.840157
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 4.299482746515423, total energy = -6.840157304507141

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: -6.840157
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 4.299482665391407, total energy = -6.840157304507114

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: -6.840157
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 4.299482741951943, total energy = -6.840157304507136

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: -6.840157
         Iterations: 32
         Function evaluations: 71
Results for this minimization:
  a = 4.299482745677233, total energy = -6.840157304507149

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: -6.840157
         Iterations: 33
         Function evaluations: 74
Results for this minimization:
  a = 4.29948276897194, total energy = -6.840157304507141

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: -6.840157
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 4.299482727627037, total energy = -6.840157304507147

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: -6.840157
         Iterations: 34
         Function evaluations: 75
Results for this minimization:
  a = 4.2994826699607085, total energy = -6.840157304507112

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: -6.840157
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 4.299482672195883, total energy = -6.840157304507134

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: -6.840157
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 4.299482729984448, total energy = -6.840157304507157

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: -6.840157
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 4.299482727795836, total energy = -6.840157304507146

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: -6.840157
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.29948275629431, total energy = -6.840157304507164

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: -6.840157
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.299482676479963, total energy = -6.840157304507122

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: -6.840157
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.299482722207902, total energy = -6.840157304507141

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: -6.840157
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 4.299482786655426, total energy = -6.840157304507155

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: -6.840157
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 4.299482786655424, total energy = -6.840157304507153

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: -6.840157
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.299482739530504, total energy = -6.840157304507128

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: -6.840157
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 4.299482794106003, total energy = -6.8401573045071276

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: -6.840157
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 4.299482751567846, total energy = -6.840157304507133

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.2994827562943065, total energy = -6.84015730450716

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: -6.840157
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.299482699553479, total energy = -6.840157304507131

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: -6.840157
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 4.299482708447613, total energy = -6.840157304507153

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.299482686148258, total energy = -6.8401573045071276

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: -6.840157
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.299482766538855, total energy = -6.840157304507137

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: -6.840157
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 4.299482759697999, total energy = -6.840157304507138

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: -6.840157
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.299482712027384, total energy = -6.840157304507123

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: -6.840157
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.299482749775052, total energy = -6.840157304507141

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: -6.840157
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.299482722207903, total energy = -6.840157304507146

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.299482683092354, total energy = -6.840157304507116

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: -6.840157
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.299482757953223, total energy = -6.840157304507127

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.299482749216255, total energy = -6.840157304507119

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: -6.840157
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 4.299482746428112, total energy = -6.84015730450714

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: -6.840157
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.299482850730422, total energy = -6.840157304507121

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: -6.840157
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.299482727283602, total energy = -6.840157304507147

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: -6.840157
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 4.299482714384787, total energy = -6.84015730450713

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: -6.840157
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.299482741951939, total energy = -6.840157304507136

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: -6.840157
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.299482766538858, total energy = -6.840157304507143

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.299482745677237, total energy = -6.840157304507147

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.299482790101311, total energy = -6.840157304507128

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.299482794007047, total energy = -6.840157304507145

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.299482738412915, total energy = -6.840157304507151

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.299482707865536, total energy = -6.840157304507137

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 4.299482739239467, total energy = -6.840157304507158

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 4.299482701707155, total energy = -6.840157304507126

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 4.2994827611488216, total energy = -6.840157304507134

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.29948267219588, total energy = -6.840157304507125

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.299482692840684, total energy = -6.840157304507132

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 4.299482729984452, total energy = -6.840157304507164

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.299482752848406, total energy = -6.840157304507147

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.299482753220936, total energy = -6.8401573045071435

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 42
         Function evaluations: 92
Results for this minimization:
  a = 4.299482755121421, total energy = -6.840157304507137

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 4.29948275629431, total energy = -6.84015730450716

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 4.299482654094031, total energy = -6.840157304507115

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 4.299482671706925, total energy = -6.8401573045071205

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

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.299482735246411, total energy = -6.840157304507159

Attempting to perform relaxation using initial lattice constant guess of a = 10.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.299482722207898, total energy = -6.8401573045071435

Attempting to perform relaxation using initial lattice constant guess of a = 10.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 4.299482749775052, total energy = -6.840157304507148

Attempting to perform relaxation using initial lattice constant guess of a = 10.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.299482770636682, total energy = -6.840157304507145

Attempting to perform relaxation using initial lattice constant guess of a = 10.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.2994828009977795, total energy = -6.840157304507128

Attempting to perform relaxation using initial lattice constant guess of a = 11.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.299482786655417, total energy = -6.84015730450715

Attempting to perform relaxation using initial lattice constant guess of a = 11.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 42
         Function evaluations: 89
Results for this minimization:
  a = 4.299482718999932, total energy = -6.840157304507142

Attempting to perform relaxation using initial lattice constant guess of a = 11.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.299482739530504, total energy = -6.840157304507129

Attempting to perform relaxation using initial lattice constant guess of a = 11.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.299482766605075, total energy = -6.840157304507146

Attempting to perform relaxation using initial lattice constant guess of a = 11.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.299482794105993, total energy = -6.8401573045071355

Attempting to perform relaxation using initial lattice constant guess of a = 11.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.29948274965863, total energy = -6.840157304507148

Attempting to perform relaxation using initial lattice constant guess of a = 11.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 4.29948275697097, total energy = -6.840157304507148

Attempting to perform relaxation using initial lattice constant guess of a = 11.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -6.840157
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 4.299482797447126, total energy = -6.840157304507129

Attempting to perform relaxation using initial lattice constant guess of a = 12.0 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 = 12.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2000000000000313 Angstroms and c = -1.9595917942265935 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 12.125 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 = 12.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2125000000000057 Angstroms and c = -1.980004208749745 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 12.25 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 = 12.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2250000000000156 Angstroms and c = -2.000416623272954 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 12.375 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 = 12.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2375000000000256 Angstroms and c = -2.0208290377961635 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 12.5 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 = 12.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.25 Angstroms and c = -2.041241452319315 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 12.625 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 = 12.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2625000000000313 Angstroms and c = -2.0616538668425592 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 12.75 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 = 12.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2750000000000057 Angstroms and c = -2.0820662813657105 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 12.875 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 = 12.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2875000000000156 Angstroms and c = -2.10247869588892 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.0 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 = 13.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3000000000000256 Angstroms and c = -2.1228911104121293 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.125 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 = 13.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3125 Angstroms and c = -2.143303524935281 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.25 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 = 13.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3250000000000313 Angstroms and c = -2.163715939458525 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.375 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 = 13.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3375000000000057 Angstroms and c = -2.1841283539816763 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.5 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 = 13.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3500000000000156 Angstroms and c = -2.2045407685048857 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.625 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 = 13.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3625000000000256 Angstroms and c = -2.224953183028095 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.75 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 = 13.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.375 Angstroms and c = -2.2453655975512468 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 13.875 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 = 13.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3875000000000313 Angstroms and c = -2.265778012074491 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.0 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 = 14.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4000000000000057 Angstroms and c = -2.286190426597642 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.125 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 = 14.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4125000000000156 Angstroms and c = -2.3066028411208515 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.25 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 = 14.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4250000000000256 Angstroms and c = -2.327015255644061 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.375 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 = 14.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4375 Angstroms and c = -2.3474276701672125 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.5 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 = 14.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4500000000000313 Angstroms and c = -2.3678400846904566 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.625 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 = 14.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4625000000000057 Angstroms and c = -2.388252499213608 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.75 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 = 14.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4750000000000156 Angstroms and c = -2.4086649137368172 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 14.875 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 = 14.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4875000000000256 Angstroms and c = -2.4290773282600266 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 15.0 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 = 15.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5 Angstroms and c = -2.449489742783178 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 15.125 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 = 15.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5125000000000313 Angstroms and c = -2.4699021573064224 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 15.25 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 = 15.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5249999999999844 Angstroms and c = -2.490314571829539 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 15.375 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 = 15.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5375000000000156 Angstroms and c = -2.510726986352783 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = 15.5 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 = 15.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.550000000000047 Angstroms and c = -2.531139400876027 Angstroms; the model cutoff was estimated to be 15.431900002062333 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 = [4.29948276] Angstroms and c = 5.616820752435232 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 76
         Function evaluations: 156
Results for this minimization:
  a = 4.299903072123566, c = 7.019652339557442, total energy = -6.840158176168735

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 5.967872049462434 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 72
         Function evaluations: 154
Results for this minimization:
  a = 4.299903033271317, c = 7.019652255204925, total energy = -6.840158176168748

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 6.318923346489636 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 74
         Function evaluations: 154
Results for this minimization:
  a = 4.2999029995398494, c = 7.019652274855414, total energy = -6.840158176168755

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 6.669974643516838 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 64
         Function evaluations: 140
Results for this minimization:
  a = 4.299902922558534, c = 7.019652635011875, total energy = -6.840158176168719

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 7.02102594054404 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 66
         Function evaluations: 144
Results for this minimization:
  a = 4.299903009347837, c = 7.019652515647382, total energy = -6.8401581761687575

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 7.372077237571242 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 72
         Function evaluations: 153
Results for this minimization:
  a = 4.299903038776667, c = 7.019652464643322, total energy = -6.840158176168739

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 7.723128534598444 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 77
         Function evaluations: 165
Results for this minimization:
  a = 4.299903002083525, c = 7.019652448073698, total energy = -6.840158176168758

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 8.074179831625646 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 69
         Function evaluations: 148
Results for this minimization:
  a = 4.2999030086740575, c = 7.0196523299550755, total energy = -6.840158176168756

Attempting to perform relaxation using initial lattice constant guess of a = [4.29948276] Angstroms and c = 8.425231128652847 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -6.840158
         Iterations: 69
         Function evaluations: 151
Results for this minimization:
  a = 4.2999029910440605, c = 7.019652368230023, total energy = -6.8401581761687416

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

 Final lattice Constants:
   a = 4.299903002083525 Angstroms, c = 7.019652448073698 Angstroms, c/a = 1.632514

 Total energy: -6.840158176168758 eV

 Cohesive energy: -1.7100395440421896 eV/atom

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