Element = Lattice = Model = Element: Ni
Lattice: hcp
Model: MEAM_LAMMPS_MaiselKoZhang_2017_VNiTi__MO_744610363128_002
Computed model cutoff of 5.000000004544876 Angstroms
Computed isolated atomic energy of 0.0 eV for species Ni

==============================================================================
==============================================================================
 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: -17.759464
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.4911351673305067, total energy = -17.759463837616195

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: -17.759464
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 2.4911351636052124, total energy = -17.759463837616188

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: -17.759464
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.491135150194168, total energy = -17.759463837616178

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: -17.759464
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.4911351630929914, total energy = -17.759463837616195

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: -17.759464
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 2.491135174781086, total energy = -17.759463837616202

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: -17.759464
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.4911351646063853, total energy = -17.7594638376162

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: -17.759464
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.491135162604041, total energy = -17.7594638376162

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: -17.759464
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.4911351767368615, total energy = -17.7594638376162

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: -17.759464
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.4911351554095758, total energy = -17.75946383761618

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: -17.759464
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 2.491135174455122, total energy = -17.759463837616195

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: -17.759464
         Iterations: 33
         Function evaluations: 72
Results for this minimization:
  a = 2.4911351636052133, total energy = -17.759463837616195

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: -17.759464
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.4911351616028696, total energy = -17.75946383761619

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: -17.759464
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 2.4911351705668494, total energy = -17.7594638376162

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: -17.759464
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 2.4911351683898824, total energy = -17.759463837616195

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: -17.759464
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.4911351666785784, total energy = -17.7594638376162

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: -17.759464
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.491135160555131, total energy = -17.75946383761619

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: -17.759464
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 2.4911351703107343, total energy = -17.759463837616195

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: -17.759464
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.491135159507394, total energy = -17.759463837616185

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: -17.759464
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 2.4911351673305027, total energy = -17.759463837616188

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: -17.759464
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 2.491135166538878, total energy = -17.759463837616188

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: -17.759464
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.4911351726274, total energy = -17.75946383761619

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: -17.759464
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 2.491135169425977, total energy = -17.759463837616188

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: -17.759464
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.4911351726332214, total energy = -17.7594638376162

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: -17.759464
         Iterations: 36
         Function evaluations: 76
Results for this minimization:
  a = 2.491135173779908, total energy = -17.759463837616195

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: -17.759464
         Iterations: 38
         Function evaluations: 79
Results for this minimization:
  a = 2.4911351562477635, total energy = -17.759463837616188

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: -17.759464
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 2.4911351666785793, total energy = -17.759463837616195

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: -17.759464
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 2.491135166538877, total energy = -17.759463837616195

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: -17.759464
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.491135175805539, total energy = -17.75946383761619

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: -17.759464
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.491135163552821, total energy = -17.75946383761619

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: -17.759464
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 2.491135168634354, total energy = -17.75946383761619

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: -17.759464
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.491135170450436, total energy = -17.759463837616195

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: -17.759464
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 2.491135162487623, total energy = -17.75946383761619

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: -17.759464
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 2.491135170450434, total energy = -17.75946383761619

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: -17.759464
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.491135171614582, total energy = -17.759463837616188

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


Attempting to perform relaxation using initial lattice constant guess of a = [2.49113517] Angstroms and c = 3.25440536454008 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 3.457805699823835 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 3.6612060351075897 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 3.8646063703913445 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 4.068006705675099 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 4.271407040958854 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 4.474807376242609 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 4.678207711526364 = ([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 = 5.125 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 = [2.49113517] Angstroms and c = 4.881608046810118 = ([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 = 5.125 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 = [2.49113517] Angstroms, c = [4.06800671] Angstroms, c/a = 1.632993

 Total energy: -17.759463837616202 eV

 Cohesive energy: -4.439865959404051 eV/atom

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