Element = Lattice = Model = Element: Cu
Lattice: hcp
Model: MEAM_LAMMPS_EtesamiAsadi_2018_Cu__MO_227887284491_000
Computed model cutoff of 3.999999990463257 Angstroms
Computed isolated atomic energy of 0.0 eV for species Cu

==============================================================================
==============================================================================
 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: -14.122558
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.5608194336295163, total energy = -14.122557886816036

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: -14.122558
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.5608194148167973, total energy = -14.12255788681604

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: -14.122558
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 2.5608194251544774, total energy = -14.122557886816042

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: -14.122558
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.5608194254338787, total energy = -14.122557886816042

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: -14.122558
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.5608194433152707, total energy = -14.122557886816036

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: -14.122558
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.5608194317668698, total energy = -14.122557886816043

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: -14.122558
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.560819427669049, total energy = -14.122557886816038

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: -14.122558
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 2.5608194426167756, total energy = -14.122557886816038

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: -14.122558
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.5608194336295145, total energy = -14.12255788681604

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: -14.122558
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.560819432558492, total energy = -14.122557886816042

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: -14.122558
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.560819428175455, total energy = -14.122557886816047

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: -14.122558
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.560819434840231, total energy = -14.12255788681604

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: -14.122558
         Iterations: 32
         Function evaluations: 67
Results for this minimization:
  a = 2.5608194251544774, total energy = -14.122557886816045

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: -14.122558
         Iterations: 32
         Function evaluations: 71
Results for this minimization:
  a = 2.5608194276690486, total energy = -14.12255788681604

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: -14.122558
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 2.560819427482783, total energy = -14.122557886816038

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: -14.122558
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.5608194123487915, total energy = -14.122557886816033

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: -14.122558
         Iterations: 34
         Function evaluations: 70
Results for this minimization:
  a = 2.5608194276690472, total energy = -14.12255788681604

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: -14.122558
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 2.5608194261440076, total energy = -14.12255788681604

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: -14.122558
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.5608194232918313, total energy = -14.12255788681604

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: -14.122558
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.5608194294851265, total energy = -14.12255788681604

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: -14.122558
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.5608194276690472, total energy = -14.122557886816038

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: -14.122558
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.56081941516604, total energy = -14.122557886816034

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: -14.122558
         Iterations: 37
         Function evaluations: 81
Results for this minimization:
  a = 2.5608194433152676, total energy = -14.122557886816036

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: -14.122558
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.560819423571226, total energy = -14.122557886816036

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: -14.122558
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.5608194410800924, total energy = -14.122557886816033

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


Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 3.345440491965686 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 70
         Function evaluations: 153
Results for this minimization:
  a = 2.55557739772855, c = 4.1990061271761405, total energy = -14.123200190381562

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 3.5545305227135415 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 72
         Function evaluations: 159
Results for this minimization:
  a = 2.5555773880385297, c = 4.19900614013771, total energy = -14.12320019038156

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 3.763620553461397 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 70
         Function evaluations: 148
Results for this minimization:
  a = 2.5555774151944135, c = 4.199006134387737, total energy = -14.123200190381564

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 3.9727105842092527 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 68
         Function evaluations: 142
Results for this minimization:
  a = 2.555577410616556, c = 4.199006118507112, total energy = -14.123200190381564

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 4.181800614957108 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 63
         Function evaluations: 140
Results for this minimization:
  a = 2.555577414487505, c = 4.199006145692646, total energy = -14.123200190381562

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 4.390890645704964 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 70
         Function evaluations: 148
Results for this minimization:
  a = 2.5555774136630642, c = 4.199006103192391, total energy = -14.123200190381558

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 4.5999806764528195 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 67
         Function evaluations: 145
Results for this minimization:
  a = 2.555577410265598, c = 4.199006095499852, total energy = -14.12320019038156

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 4.809070707200675 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 73
         Function evaluations: 157
Results for this minimization:
  a = 2.5555774070264743, c = 4.199006142496599, total energy = -14.123200190381558

Attempting to perform relaxation using initial lattice constant guess of a = [2.56081943] Angstroms and c = 5.018160737948531 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -14.123200
         Iterations: 75
         Function evaluations: 158
Results for this minimization:
  a = 2.555577405226182, c = 4.199006132265183, total energy = -14.123200190381565

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

 Final lattice Constants:
   a = 2.555577405226182 Angstroms, c = 4.199006132265183 Angstroms, c/a = 1.643075

 Total energy: -14.123200190381565 eV

 Cohesive energy: -3.5308000475953913 eV/atom

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