Element = Lattice = Model = Element: Ag
Lattice: hcp
Model: MEAM_LAMMPS_LeeShimBaskes_2003_Ag__MO_969318541747_001
Computed model cutoff of 4.5000000042096095 Angstroms
Computed isolated atomic energy of 0.0 eV for species Ag

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


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

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.8805717349052467, total energy = -11.381387824971885

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

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 2.880571732297539, total energy = -11.381387824971887

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

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.8805717376526445, total energy = -11.381387824971887

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

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.880571730871458, total energy = -11.381387824971887

Attempting to perform relaxation using initial lattice constant guess of a = 1.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 2.8805717322975433, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.880571743100883, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 1.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.8805717393755907, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 1.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8805717322975397, total energy = -11.381387824971887

Attempting to perform relaxation using initial lattice constant guess of a = 2.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.880571722984317, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 2.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.880571735650302, total energy = -11.381387824971881

Attempting to perform relaxation using initial lattice constant guess of a = 2.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.8805717360693963, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 2.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.8805717291310424, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 2.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.8805717304348946, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 2.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 2.880571734812111, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 2.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 32
         Function evaluations: 68
Results for this minimization:
  a = 2.8805717390030616, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 2.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.880571729503572, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 3.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 2.8805717334151266, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 3.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.8805717267096043, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 3.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 35
         Function evaluations: 77
Results for this minimization:
  a = 2.880571723729372, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 3.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.8805717294686466, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 3.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 2.8805717317154604, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 3.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.8805717291310415, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 3.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.8805717268842272, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 3.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.880571740120647, total energy = -11.381387824971887

Attempting to perform relaxation using initial lattice constant guess of a = 4.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.88057173192501, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 4.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.8805717336246754, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 4.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.880571729317305, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 4.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.8805717376235407, total energy = -11.381387824971883

Attempting to perform relaxation using initial lattice constant guess of a = 4.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 2.8805717354407494, total energy = -11.381387824971885

Attempting to perform relaxation using initial lattice constant guess of a = 4.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -11.381388
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.8805717331357297, total energy = -11.381387824971883

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


Attempting to perform relaxation using initial lattice constant guess of a = [2.88057173] Angstroms and c = 3.763163152860796 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 3.998360849914596 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 4.233558546968396 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 4.468756244022195 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 4.703953941075996 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 4.939151638129795 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 5.174349335183596 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 5.409547032237395 = ([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 = 4.625 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 = [2.88057173] Angstroms and c = 5.644744729291196 = ([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 = 4.625 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 = [2.88057173] Angstroms, c = [4.70395394] Angstroms, c/a = 1.632993

 Total energy: -11.381387824971887 eV

 Cohesive energy: -2.8453469562429716 eV/atom

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