Element = Lattice = Model = Element: Al
Lattice: hcp
Model: MEAM_LAMMPS_DickelBaskesAslam_2018_MgAlZn__MO_093637366498_002
Computed model cutoff of 5.999999990463257 Angstroms
Computed isolated atomic energy of 0.0 eV for species Al

==============================================================================
==============================================================================
 Starting optimization to find optimum lattice constant 'a' with c/a fixed to
 sqrt(8/3)
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = 1.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.307108
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.8704327523708377, total energy = -13.307107565043227

Attempting to perform relaxation using initial lattice constant guess of a = 1.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.307108
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 2.8704327743500473, total energy = -13.307107565043212

Attempting to perform relaxation using initial lattice constant guess of a = 1.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.307108
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.870432758703828, total energy = -13.307107565043221

Attempting to perform relaxation using initial lattice constant guess of a = 1.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.307108
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8704327464103754, total energy = -13.307107565043223

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: -13.307108
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8704327452927867, total energy = -13.30710756504323

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: -13.307108
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 2.8704327556886726, total energy = -13.307107565043227

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: -13.307108
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 2.8704327546060084, total energy = -13.30710756504322

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: -13.307108
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.87043275590986, total energy = -13.307107565043227

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: -13.307108
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.870432751998307, total energy = -13.307107565043225

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: -13.307108
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.8704327492043396, total energy = -13.307107565043228

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: -13.307108
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.8704327626153834, total energy = -13.307107565043223

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: -13.307108
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.8704327429761163, total energy = -13.307107565043221

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: -13.307108
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.870432758703828, total energy = -13.307107565043225

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: -13.307108
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.870432775406516, total energy = -13.307107565043218

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: -13.307108
         Iterations: 32
         Function evaluations: 68
Results for this minimization:
  a = 2.8704327576793736, total energy = -13.307107565043225

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: -13.307108
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 2.8704327483894305, total energy = -13.307107565043225

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: -13.307108
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 2.8704327528364955, total energy = -13.307107565043225

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: -13.307108
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.870432752533816, total energy = -13.307107565043223

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: -13.307108
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.87043275553733, total energy = -13.307107565043221

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: -13.307108
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.870432740901014, total energy = -13.30710756504322

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: -13.307108
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.8704327604733395, total energy = -13.307107565043228

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: -13.307108
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.870432765613076, total energy = -13.30710756504322

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: -13.307108
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.870432747527957, total energy = -13.30710756504322

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: -13.307108
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8704327531158897, total energy = -13.307107565043223

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: -13.307108
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.8704327523708337, total energy = -13.307107565043227

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: -13.307108
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.8704327464103705, total energy = -13.307107565043221

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: -13.307108
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8704327460378396, total energy = -13.307107565043223

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: -13.307108
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.8704327477607876, total energy = -13.307107565043227

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: -13.307108
         Iterations: 38
         Function evaluations: 78
Results for this minimization:
  a = 2.870432755805082, total energy = -13.307107565043228

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: -13.307108
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.8704327509622076, total energy = -13.307107565043223

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: -13.307108
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.8704327431973082, total energy = -13.307107565043227

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: -13.307108
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.8704327510728, total energy = -13.307107565043223

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: -13.307108
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.8704327531741, total energy = -13.307107565043221

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: -13.307108
         Iterations: 39
         Function evaluations: 81
Results for this minimization:
  a = 2.8704327511833934, total energy = -13.307107565043223

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: -13.307108
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 2.870432759821413, total energy = -13.307107565043223

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: -13.307108
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.8704327598214157, total energy = -13.307107565043221

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: -13.307108
         Iterations: 39
         Function evaluations: 81
Results for this minimization:
  a = 2.870432745129798, total energy = -13.307107565043225

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: -13.307108
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.870432749099564, total energy = -13.307107565043223

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: -13.307108
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.870432773558418, total energy = -13.307107565043218

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: -13.307108
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 2.87043273290037, total energy = -13.307107565043218

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: -13.307108
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.8704327598214077, total energy = -13.307107565043225

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


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 3.749917635703275 = ([1.30639453] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 3.9842874879347296 = ([1.38804419] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 4.218657340166184 = ([1.46969385] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 4.45302719239764 = ([1.5513435] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 4.687397044629094 = ([1.63299316] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 4.921766896860548 = ([1.71464282] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 5.156136749092004 = ([1.79629248] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 5.390506601323459 = ([1.87794214] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = [2.87043275] Angstroms and c = 5.624876453554913 = ([1.95959179] * a) Angstroms

     Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 6.0 Angstroms
     Exception message:
setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
     Continuing...


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

 Final lattice Constants:
   a = [2.87043275] Angstroms, c = [4.68739704] Angstroms, c/a = 1.632993

 Total energy: -13.30710756504323 eV

 Cohesive energy: -3.3267768912608076 eV/atom

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