Element = Lattice = Model = Element: Cu
Lattice: hcp
Model: MEAM_LAMMPS_EtesamiAsadi_2018_Cu__MO_227887284491_001
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: 68
Results for this minimization:
  a = 2.5608194251544774, total energy = -14.122557886816043

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: 33
         Function evaluations: 73
Results for this minimization:
  a = 2.560819426446688, total energy = -14.122557886816042

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: 33
         Function evaluations: 69
Results for this minimization:
  a = 2.5608194267144415, total energy = -14.122557886816042

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: 72
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: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.560819414816796, total energy = -14.122557886816038

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: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.560819426435046, total energy = -14.122557886816038

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: 74
Results for this minimization:
  a = 2.560819422081112, total energy = -14.122557886816038

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: 76
Results for this minimization:
  a = 2.560819439229088, total energy = -14.122557886816036

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: 77
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: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.5608194151660397, total energy = -14.122557886816038

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: 82
Results for this minimization:
  a = 2.5608194426167756, 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: 77
Results for this minimization:
  a = 2.560819422849451, total energy = -14.122557886816038

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: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.5608194356784217, total energy = -14.122557886816038

==============================================================================
==============================================================================
 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: 71
         Function evaluations: 153
Results for this minimization:
  a = 2.5555774075782858, c = 4.199006130922305, total energy = -14.123200190381565

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: 69
         Function evaluations: 143
Results for this minimization:
  a = 2.555577394994562, c = 4.199006113648567, total energy = -14.123200190381558

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: 68
         Function evaluations: 144
Results for this minimization:
  a = 2.5555774164289433, c = 4.199006123586722, total energy = -14.123200190381562

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: 67
         Function evaluations: 139
Results for this minimization:
  a = 2.5555774069888306, c = 4.19900610831886, total energy = -14.123200190381562

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: 67
         Function evaluations: 149
Results for this minimization:
  a = 2.555577397974141, c = 4.199006127902305, total energy = -14.12320019038156

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: 71
         Function evaluations: 150
Results for this minimization:
  a = 2.5555774106918414, c = 4.199006082289595, total energy = -14.12320019038156

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: 69
         Function evaluations: 149
Results for this minimization:
  a = 2.55557740953246, c = 4.1990060866248555, total energy = -14.123200190381558

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: 68
         Function evaluations: 147
Results for this minimization:
  a = 2.5555774136203055, c = 4.199006120143228, total energy = -14.12320019038156

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: 77
         Function evaluations: 159
Results for this minimization:
  a = 2.5555774113661274, c = 4.199006114785447, total energy = -14.123200190381562

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

 Final lattice Constants:
   a = 2.5555774075782858 Angstroms, c = 4.199006130922305 Angstroms, c/a = 1.643075

 Total energy: -14.123200190381565 eV

 Cohesive energy: -3.5308000475953913 eV/atom

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