Element = Lattice = Model = Element: Eu
Lattice: hcp
Model: LJ_ElliottAkerson_2015_Universal__MO_959249795837_003
Computed model cutoff of 14.111799996718807 Angstroms
Computed isolated atomic energy of 0.0 eV for species Eu

==============================================================================
==============================================================================
 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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))

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.8513769430574087, total energy = -14.319835410754623

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: -14.319835
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 3.851376900821926, total energy = -14.319835410754582

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: -14.319835
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.8513769194483753, total energy = -14.319835410754639

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: -14.319835
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.8513769283890724, total energy = -14.319835410754578

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: -14.319835
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.851376897096637, total energy = -14.319835410754647

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: -14.319835
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.8513769195415093, total energy = -14.319835410754612

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: -14.319835
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 3.851376897096634, total energy = -14.319835410754651

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: -14.319835
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 3.851376897061706, total energy = -14.319835410754655

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: -14.319835
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.85137689858675, total energy = -14.319835410754628

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: -14.319835
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.85137691847049, total energy = -14.319835410754665

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: -14.319835
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 3.8513769164681477, total energy = -14.31983541075466

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: -14.319835
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.8513769377022973, total energy = -14.31983541075456

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: -14.319835
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 3.8513769328594227, total energy = -14.319835410754584

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: -14.319835
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 3.851376917446032, total energy = -14.319835410754608

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: -14.319835
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 3.8513768905308097, total energy = -14.319835410754603

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: -14.319835
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 3.8513768970966344, total energy = -14.319835410754653

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: -14.319835
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 3.8513769194483762, total energy = -14.31983541075464

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: -14.319835
         Iterations: 32
         Function evaluations: 68
Results for this minimization:
  a = 3.8513769201934345, total energy = -14.319835410754646

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: -14.319835
         Iterations: 32
         Function evaluations: 69
Results for this minimization:
  a = 3.8513769283890724, total energy = -14.319835410754582

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: -14.319835
         Iterations: 32
         Function evaluations: 69
Results for this minimization:
  a = 3.8513769164681437, total energy = -14.319835410754663

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: -14.319835
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 3.8513768970966327, total energy = -14.319835410754644

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: -14.319835
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 3.851376931322739, total energy = -14.319835410754633

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: -14.319835
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 3.851376919541507, total energy = -14.319835410754603

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: -14.319835
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 3.85137689858675, total energy = -14.319835410754628

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: -14.319835
         Iterations: 35
         Function evaluations: 77
Results for this minimization:
  a = 3.8513768970966322, total energy = -14.319835410754644

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: -14.319835
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 3.85137689653784, total energy = -14.319835410754578

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: -14.319835
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 3.8513769362121835, total energy = -14.319835410754617

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: -14.319835
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.8513769539800684, total energy = -14.319835410754651

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: -14.319835
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.85137689858675, total energy = -14.319835410754632

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: -14.319835
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 3.851376898479063, total energy = -14.319835410754589

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: -14.319835
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 3.8513769184704865, total energy = -14.319835410754663

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: -14.319835
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 3.85137688392424, total energy = -14.319835410754566

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: -14.319835
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.8513769164681415, total energy = -14.319835410754663

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: -14.319835
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 3.8513769049022812, total energy = -14.31983541075463

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: -14.319835
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 3.8513769350247413, total energy = -14.31983541075463

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: -14.319835
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.851376929483375, total energy = -14.319835410754642

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: -14.319835
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 3.8513769328594156, total energy = -14.31983541075465

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: -14.319835
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.8513769194483727, total energy = -14.319835410754639

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: -14.319835
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 3.8513768928532954, total energy = -14.319835410754576

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: -14.319835
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 3.851376926913507, total energy = -14.319835410754612

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: -14.319835
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.8513768908334844, total energy = -14.31983541075459

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: -14.319835
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 3.8513768900069345, total energy = -14.319835410754642

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: -14.319835
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 3.851376897096631, total energy = -14.319835410754644

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: -14.319835
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 3.851376886246726, total energy = -14.31983541075457

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: -14.319835
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.8513769194483736, total energy = -14.319835410754637

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: -14.319835
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.8513769362121772, total energy = -14.31983541075464

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: -14.319835
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.8513769201934274, total energy = -14.319835410754637

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: -14.319835
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 3.85137690560077, total energy = -14.319835410754617

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: -14.319835
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 3.8513769283890724, total energy = -14.319835410754587

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: -14.319835
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.8513768985780237, total energy = -14.319835410754642

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: -14.319835
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 3.851376916468133, total energy = -14.319835410754662

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: -14.319835
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.851376907469232, total energy = -14.319835410754646

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: -14.319835
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.851376897096629, total energy = -14.319835410754646

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: -14.319835
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 3.8513768850825727, total energy = -14.319835410754584

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: -14.319835
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 3.851376931418785, total energy = -14.31983541075466

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: -14.319835
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 3.8513768948614486, total energy = -14.319835410754605

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: -14.319835
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 3.851376919442547, total energy = -14.31983541075461

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: -14.319835
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 3.85137689466064, total energy = -14.3198354107546

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: -14.319835
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 3.85137689858675, total energy = -14.319835410754628

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: -14.319835
         Iterations: 40
         Function evaluations: 88
Results for this minimization:
  a = 3.8513769325276406, total energy = -14.319835410754571

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: -14.319835
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 3.8513768970966216, total energy = -14.319835410754624

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: -14.319835
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 3.8513769164681353, total energy = -14.319835410754658

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: -14.319835
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.8513768968608892, total energy = -14.319835410754616

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: -14.319835
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 3.851376880193129, total energy = -14.319835410754596

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: -14.319835
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 3.8513768968405246, total energy = -14.31983541075464

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: -14.319835
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 3.8513769282493615, total energy = -14.319835410754601

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: -14.319835
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 3.851376917942244, total energy = -14.319835410754662

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: -14.319835
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.8513769650948193, total energy = -14.319835410754534

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: -14.319835
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.85137689858675, total energy = -14.319835410754617

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: -14.319835
         Iterations: 43
         Function evaluations: 92
Results for this minimization:
  a = 3.8513769460521914, total energy = -14.31983541075456

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: -14.319835
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.8513768900069274, total energy = -14.319835410754623

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: -14.319835
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 3.8513769133947706, total energy = -14.319835410754632

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: -14.319835
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 3.851376918470483, total energy = -14.319835410754678

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: -14.319835
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 3.851376894803252, total energy = -14.319835410754612

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: -14.319835
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 3.8513768839242437, total energy = -14.319835410754571

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: -14.319835
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 3.8513769336975967, total energy = -14.319835410754624

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: -14.319835
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 3.851376916980362, total energy = -14.319835410754687

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: -14.319835
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 3.8513769586686943, total energy = -14.319835410754562

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: -14.319835
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 3.8513768669217825, total energy = -14.31983541075456

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: -14.319835
         Iterations: 43
         Function evaluations: 93
Results for this minimization:
  a = 3.851376914518192, total energy = -14.319835410754582

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: -14.319835
         Iterations: 41
         Function evaluations: 86
Results for this minimization:
  a = 3.8513769291341156, total energy = -14.319835410754587

Attempting to perform relaxation using initial lattice constant guess of a = 11.625 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 = 11.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.1625000000000156 Angstroms and c = -1.8983545506569885 Angstroms; the model cutoff was estimated to be 14.111799996718807 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 = 11.75 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 = 11.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.1750000000000078 Angstroms and c = -1.9187669651801689 Angstroms; the model cutoff was estimated to be 14.111799996718807 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 = 11.875 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 = 11.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.1875 Angstroms and c = -1.9391793797033494 Angstroms; the model cutoff was estimated to be 14.111799996718807 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 = 12.0 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 14.111799996718807 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 = [3.85137692] Angstroms and c = 5.031417735325491 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 77
         Function evaluations: 165
Results for this minimization:
  a = 3.8513513080553095, c = 6.289355807542092, total energy = -14.31983543542296

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 5.345881343783335 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 72
         Function evaluations: 160
Results for this minimization:
  a = 3.8513512971097335, c = 6.289355789977119, total energy = -14.319835435422926

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 5.660344952241178 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 73
         Function evaluations: 150
Results for this minimization:
  a = 3.851351337071635, c = 6.289355692115511, total energy = -14.319835435422933

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 5.974808560699021 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 70
         Function evaluations: 150
Results for this minimization:
  a = 3.851351315796941, c = 6.289355840812543, total energy = -14.319835435422918

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 6.289272169156864 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 69
         Function evaluations: 147
Results for this minimization:
  a = 3.851351296817169, c = 6.289355849447392, total energy = -14.319835435422904

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 6.603735777614707 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 78
         Function evaluations: 156
Results for this minimization:
  a = 3.8513513363507776, c = 6.2893557519069265, total energy = -14.319835435422913

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 6.91819938607255 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 80
         Function evaluations: 160
Results for this minimization:
  a = 3.8513513096397984, c = 6.289355775646299, total energy = -14.319835435422958

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 7.2326629945303935 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 76
         Function evaluations: 162
Results for this minimization:
  a = 3.8513512987417915, c = 6.289355886641779, total energy = -14.319835435422934

Attempting to perform relaxation using initial lattice constant guess of a = [3.85137692] Angstroms and c = 7.547126602988237 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.319835
         Iterations: 80
         Function evaluations: 164
Results for this minimization:
  a = 3.8513513191570405, c = 6.289355792320306, total energy = -14.319835435422982

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

 Final lattice Constants:
   a = 3.8513513191570405 Angstroms, c = 6.289355792320306 Angstroms, c/a = 1.633026

 Total energy: -14.319835435422982 eV

 Cohesive energy: -3.5799588588557456 eV/atom

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