Model Extended KIM ID = === Verification check vc-periodicity-support start (2018-05-10 21:41:32) === !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!! !!!!! !!!!! VERIFICATION CHECK: vc-periodicity-support !!!!! !!!!! !!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Description: Check that the model supports periodic boundary conditions correctly. If the simulation box is increased by an integer factor along a periodic direction, the total energy must multiply by that factor and the forces on atoms that are periodic copies of each other must be the same. The check is performed for a randomly distorted non-periodic face-centered cubic (FCC) cube base structure. Separate configurations are tested for each species supported by the model, as well as one containing a random distribution of all species. For each configuration, all possible combinations of periodic boundary conditions are tested: TFF, FTF, FFT, TTF, TFT, TTF, TTT (where 'T' indicates periodicity along a direction, and 'F' indicates no periodicity). The verification check passes if the energy of all configurations that the model is able to compute support all periodic boundary conditions correctly. Configurations used for testing are provided as auxiliary files. Author: Ellad Tadmor ------------------------------------------------------------------------------------------------------------------------ Results for KIM Model : EAM_Dynamo_Zhou_Johnson_Pt__MO_102190350384_004 Supported species : Pt random seed = 13 lattice constant (orig) = 3.000 perturbation amplitude = 0.300 number unit cells per side = 1 ------------------------------------------------------------------------------------------------------------------------ * Error: at line 626 in EAM_Implementation.hpp Message: Particle has density value outside of embedding function interpolation domain KIM_STATUS_MSG: unsuccessful completion * Error: at line 626 in EAM_Implementation.hpp Message: Particle has density value outside of embedding function interpolation domain KIM_STATUS_MSG: unsuccessful completion MONOATOMIC STRUCTURE -- Species = Pt, PBC = TTT (Configuration in file "config-Pt-TTT.xyz") ------------------------------------------------------------------------------------------------------------------------ The system is doubled in p=3 periodic directions, which means an increase by a factor n=2^3=8 in the number of atoms and in the energy. Energy requirement: V(DBL_p(r_1,...,r_N)) = (2^p) V(r_1,...,r_N), where r_i is the position of atom i, V is the potential energy, and DBL_p is an operator that doubles the configuration in p periodic directions. V(DBL_p(r_1,...,r_N)) = 963.111048003 2^p V(r_1,...,r_N) = 963.111048003 Forces requirement: f_k(DBL_p(r_1,...,r_N)) = f_(k % N)(r_1,...,r_N), where r_i is the position of atom i, f_k is the force on atom k (where k runs from 1 to the number of atoms in the doubled configuration), DBL_p doubles the configuration in p periodic directions, N is the number of atoms in the original configuration, and % is the modulo operator. k f_k(DBL_p(r_1,...,r_N)) f_(k % N)(r_1,...,r_N) ------------------------------------------------------------------------------------------------------------------------ 0 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 1 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 2 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 3 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 4 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 5 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 6 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 7 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 8 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 9 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 10 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 11 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 12 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 13 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 14 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 15 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 16 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 17 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 18 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 19 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 20 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 21 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 22 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 23 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 24 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 25 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 26 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 27 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 28 -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 | -8.41487108e+01 -1.26014021e+02 -1.36644604e+02 29 8.07491273e+01 4.15128294e+01 -5.90655405e+01 | 8.07491273e+01 4.15128294e+01 -5.90655405e+01 30 7.14026012e+01 -7.71718184e+01 9.66115752e+01 | 7.14026012e+01 -7.71718184e+01 9.66115752e+01 31 -6.80030177e+01 1.61673010e+02 9.90985689e+01 | -6.80030177e+01 1.61673010e+02 9.90985689e+01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Pt, PBC = TTF (Configuration in file "config-Pt-TTF.xyz") ------------------------------------------------------------------------------------------------------------------------ The system is doubled in p=2 periodic directions, which means an increase by a factor n=2^2=4 in the number of atoms and in the energy. Energy requirement: V(DBL_p(r_1,...,r_N)) = (2^p) V(r_1,...,r_N), where r_i is the position of atom i, V is the potential energy, and DBL_p is an operator that doubles the configuration in p periodic directions. V(DBL_p(r_1,...,r_N)) = 23.9360021316 2^p V(r_1,...,r_N) = 23.9360021316 Forces requirement: f_k(DBL_p(r_1,...,r_N)) = f_(k % N)(r_1,...,r_N), where r_i is the position of atom i, f_k is the force on atom k (where k runs from 1 to the number of atoms in the doubled configuration), DBL_p doubles the configuration in p periodic directions, N is the number of atoms in the original configuration, and % is the modulo operator. k f_k(DBL_p(r_1,...,r_N)) f_(k % N)(r_1,...,r_N) ------------------------------------------------------------------------------------------------------------------------ 0 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 | 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 1 -4.62159856e+00 9.65049396e+00 -2.02745707e+01 | -4.62159856e+00 9.65049396e+00 -2.02745707e+01 2 1.36540778e+01 -9.51348357e+00 2.04637714e+01 | 1.36540778e+01 -9.51348357e+00 2.04637714e+01 3 -1.19912986e+01 7.76351104e+00 1.75806997e+01 | -1.19912986e+01 7.76351104e+00 1.75806997e+01 4 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 | 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 5 -4.62159856e+00 9.65049396e+00 -2.02745707e+01 | -4.62159856e+00 9.65049396e+00 -2.02745707e+01 6 1.36540778e+01 -9.51348357e+00 2.04637714e+01 | 1.36540778e+01 -9.51348357e+00 2.04637714e+01 7 -1.19912986e+01 7.76351104e+00 1.75806997e+01 | -1.19912986e+01 7.76351104e+00 1.75806997e+01 8 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 | 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 9 -4.62159856e+00 9.65049396e+00 -2.02745707e+01 | -4.62159856e+00 9.65049396e+00 -2.02745707e+01 10 1.36540778e+01 -9.51348357e+00 2.04637714e+01 | 1.36540778e+01 -9.51348357e+00 2.04637714e+01 11 -1.19912986e+01 7.76351104e+00 1.75806997e+01 | -1.19912986e+01 7.76351104e+00 1.75806997e+01 12 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 | 2.95881940e+00 -7.90052143e+00 -1.77699003e+01 13 -4.62159856e+00 9.65049396e+00 -2.02745707e+01 | -4.62159856e+00 9.65049396e+00 -2.02745707e+01 14 1.36540778e+01 -9.51348357e+00 2.04637714e+01 | 1.36540778e+01 -9.51348357e+00 2.04637714e+01 15 -1.19912986e+01 7.76351104e+00 1.75806997e+01 | -1.19912986e+01 7.76351104e+00 1.75806997e+01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Pt, PBC = TFT (Configuration in file "config-Pt-TFT.xyz") ------------------------------------------------------------------------------------------------------------------------ The system is doubled in p=2 periodic directions, which means an increase by a factor n=2^2=4 in the number of atoms and in the energy. Energy requirement: V(DBL_p(r_1,...,r_N)) = (2^p) V(r_1,...,r_N), where r_i is the position of atom i, V is the potential energy, and DBL_p is an operator that doubles the configuration in p periodic directions. V(DBL_p(r_1,...,r_N)) = 30.8022318274 2^p V(r_1,...,r_N) = 30.8022318274 Forces requirement: f_k(DBL_p(r_1,...,r_N)) = f_(k % N)(r_1,...,r_N), where r_i is the position of atom i, f_k is the force on atom k (where k runs from 1 to the number of atoms in the doubled configuration), DBL_p doubles the configuration in p periodic directions, N is the number of atoms in the original configuration, and % is the modulo operator. k f_k(DBL_p(r_1,...,r_N)) f_(k % N)(r_1,...,r_N) ------------------------------------------------------------------------------------------------------------------------ 0 -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 | -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 1 1.01381033e+01 1.87814834e+01 8.13487498e+00 | 1.01381033e+01 1.87814834e+01 8.13487498e+00 2 1.27163385e+01 -1.91640343e+01 1.48218699e+01 | 1.27163385e+01 -1.91640343e+01 1.48218699e+01 3 -8.18776349e+00 1.90625850e+01 -1.17193232e+01 | -8.18776349e+00 1.90625850e+01 -1.17193232e+01 4 -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 | -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 5 1.01381033e+01 1.87814834e+01 8.13487498e+00 | 1.01381033e+01 1.87814834e+01 8.13487498e+00 6 1.27163385e+01 -1.91640343e+01 1.48218699e+01 | 1.27163385e+01 -1.91640343e+01 1.48218699e+01 7 -8.18776349e+00 1.90625850e+01 -1.17193232e+01 | -8.18776349e+00 1.90625850e+01 -1.17193232e+01 8 -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 | -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 9 1.01381033e+01 1.87814834e+01 8.13487498e+00 | 1.01381033e+01 1.87814834e+01 8.13487498e+00 10 1.27163385e+01 -1.91640343e+01 1.48218699e+01 | 1.27163385e+01 -1.91640343e+01 1.48218699e+01 11 -8.18776349e+00 1.90625850e+01 -1.17193232e+01 | -8.18776349e+00 1.90625850e+01 -1.17193232e+01 12 -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 | -1.46666783e+01 -1.86800341e+01 -1.12374218e+01 13 1.01381033e+01 1.87814834e+01 8.13487498e+00 | 1.01381033e+01 1.87814834e+01 8.13487498e+00 14 1.27163385e+01 -1.91640343e+01 1.48218699e+01 | 1.27163385e+01 -1.91640343e+01 1.48218699e+01 15 -8.18776349e+00 1.90625850e+01 -1.17193232e+01 | -8.18776349e+00 1.90625850e+01 -1.17193232e+01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Pt, PBC = TFF (Configuration in file "config-Pt-TFF.xyz") ------------------------------------------------------------------------------------------------------------------------ The system is doubled in p=1 periodic directions, which means an increase by a factor n=2^1=2 in the number of atoms and in the energy. Energy requirement: V(DBL_p(r_1,...,r_N)) = (2^p) V(r_1,...,r_N), where r_i is the position of atom i, V is the potential energy, and DBL_p is an operator that doubles the configuration in p periodic directions. V(DBL_p(r_1,...,r_N)) = -11.8189460419 2^p V(r_1,...,r_N) = -11.8189460419 Forces requirement: f_k(DBL_p(r_1,...,r_N)) = f_(k % N)(r_1,...,r_N), where r_i is the position of atom i, f_k is the force on atom k (where k runs from 1 to the number of atoms in the doubled configuration), DBL_p doubles the configuration in p periodic directions, N is the number of atoms in the original configuration, and % is the modulo operator. k f_k(DBL_p(r_1,...,r_N)) f_(k % N)(r_1,...,r_N) ------------------------------------------------------------------------------------------------------------------------ 0 -8.27743242e+00 -1.07905770e+01 -1.51898740e+01 | -8.27743242e+00 -1.07905770e+01 -1.51898740e+01 1 4.09955360e+00 9.88583518e+00 -8.05396262e+00 | 4.09955360e+00 9.88583518e+00 -8.05396262e+00 2 6.14942096e+00 -8.60083990e+00 1.26794407e+01 | 6.14942096e+00 -8.60083990e+00 1.26794407e+01 3 -1.97154214e+00 9.50558175e+00 1.05643959e+01 | -1.97154214e+00 9.50558175e+00 1.05643959e+01 4 -8.27743242e+00 -1.07905770e+01 -1.51898740e+01 | -8.27743242e+00 -1.07905770e+01 -1.51898740e+01 5 4.09955360e+00 9.88583518e+00 -8.05396262e+00 | 4.09955360e+00 9.88583518e+00 -8.05396262e+00 6 6.14942096e+00 -8.60083990e+00 1.26794407e+01 | 6.14942096e+00 -8.60083990e+00 1.26794407e+01 7 -1.97154214e+00 9.50558175e+00 1.05643959e+01 | -1.97154214e+00 9.50558175e+00 1.05643959e+01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Pt, PBC = FTT (Configuration in file "config-Pt-FTT.xyz") ------------------------------------------------------------------------------------------------------------------------ The system is doubled in p=2 periodic directions, which means an increase by a factor n=2^2=4 in the number of atoms and in the energy. Energy requirement: V(DBL_p(r_1,...,r_N)) = (2^p) V(r_1,...,r_N), where r_i is the position of atom i, V is the potential energy, and DBL_p is an operator that doubles the configuration in p periodic directions. V(DBL_p(r_1,...,r_N)) = 97.9862515367 2^p V(r_1,...,r_N) = 97.9862515367 Forces requirement: f_k(DBL_p(r_1,...,r_N)) = f_(k % N)(r_1,...,r_N), where r_i is the position of atom i, f_k is the force on atom k (where k runs from 1 to the number of atoms in the doubled configuration), DBL_p doubles the configuration in p periodic directions, N is the number of atoms in the original configuration, and % is the modulo operator. k f_k(DBL_p(r_1,...,r_N)) f_(k % N)(r_1,...,r_N) ------------------------------------------------------------------------------------------------------------------------ 0 -3.17882700e+01 6.48872757e+00 7.52684189e+00 | -3.17882700e+01 6.48872757e+00 7.52684189e+00 1 3.86398331e+01 -7.38620051e+00 2.33599876e+01 | 3.86398331e+01 -7.38620051e+00 2.33599876e+01 2 3.50761619e+01 1.16272474e+01 -1.15329264e+01 | 3.50761619e+01 1.16272474e+01 -1.15329264e+01 3 -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 | -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 4 -3.17882700e+01 6.48872757e+00 7.52684189e+00 | -3.17882700e+01 6.48872757e+00 7.52684189e+00 5 3.86398331e+01 -7.38620051e+00 2.33599876e+01 | 3.86398331e+01 -7.38620051e+00 2.33599876e+01 6 3.50761619e+01 1.16272474e+01 -1.15329264e+01 | 3.50761619e+01 1.16272474e+01 -1.15329264e+01 7 -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 | -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 8 -3.17882700e+01 6.48872757e+00 7.52684189e+00 | -3.17882700e+01 6.48872757e+00 7.52684189e+00 9 3.86398331e+01 -7.38620051e+00 2.33599876e+01 | 3.86398331e+01 -7.38620051e+00 2.33599876e+01 10 3.50761619e+01 1.16272474e+01 -1.15329264e+01 | 3.50761619e+01 1.16272474e+01 -1.15329264e+01 11 -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 | -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 12 -3.17882700e+01 6.48872757e+00 7.52684189e+00 | -3.17882700e+01 6.48872757e+00 7.52684189e+00 13 3.86398331e+01 -7.38620051e+00 2.33599876e+01 | 3.86398331e+01 -7.38620051e+00 2.33599876e+01 14 3.50761619e+01 1.16272474e+01 -1.15329264e+01 | 3.50761619e+01 1.16272474e+01 -1.15329264e+01 15 -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 | -4.19277250e+01 -1.07297745e+01 -1.93539030e+01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Pt, PBC = FTF (Configuration in file "config-Pt-FTF.xyz") ------------------------------------------------------------------------------------------------------------------------ The system is doubled in p=1 periodic directions, which means an increase by a factor n=2^1=2 in the number of atoms and in the energy. Energy requirement: V(DBL_p(r_1,...,r_N)) = (2^p) V(r_1,...,r_N), where r_i is the position of atom i, V is the potential energy, and DBL_p is an operator that doubles the configuration in p periodic directions. V(DBL_p(r_1,...,r_N)) = 4.52820827693 2^p V(r_1,...,r_N) = 4.52820827693 Forces requirement: f_k(DBL_p(r_1,...,r_N)) = f_(k % N)(r_1,...,r_N), where r_i is the position of atom i, f_k is the force on atom k (where k runs from 1 to the number of atoms in the doubled configuration), DBL_p doubles the configuration in p periodic directions, N is the number of atoms in the original configuration, and % is the modulo operator. k f_k(DBL_p(r_1,...,r_N)) f_(k % N)(r_1,...,r_N) ------------------------------------------------------------------------------------------------------------------------ 0 -1.45012891e+01 1.18180258e+01 -1.72529123e+01 | -1.45012891e+01 1.18180258e+01 -1.72529123e+01 1 2.21465587e+01 -8.80176569e+00 -1.00177645e+01 | 2.21465587e+01 -8.80176569e+00 -1.00177645e+01 2 1.55698992e+01 1.09367302e+01 1.51321352e+01 | 1.55698992e+01 1.09367302e+01 1.51321352e+01 3 -2.32151688e+01 -1.39529903e+01 1.21385416e+01 | -2.32151688e+01 -1.39529903e+01 1.21385416e+01 4 -1.45012891e+01 1.18180258e+01 -1.72529123e+01 | -1.45012891e+01 1.18180258e+01 -1.72529123e+01 5 2.21465587e+01 -8.80176569e+00 -1.00177645e+01 | 2.21465587e+01 -8.80176569e+00 -1.00177645e+01 6 1.55698992e+01 1.09367302e+01 1.51321352e+01 | 1.55698992e+01 1.09367302e+01 1.51321352e+01 7 -2.32151688e+01 -1.39529903e+01 1.21385416e+01 | -2.32151688e+01 -1.39529903e+01 1.21385416e+01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Pt, PBC = FFT (Configuration in file "config-Pt-FFT.xyz") ------------------------------------------------------------------------------------------------------------------------ The system is doubled in p=1 periodic directions, which means an increase by a factor n=2^1=2 in the number of atoms and in the energy. Energy requirement: V(DBL_p(r_1,...,r_N)) = (2^p) V(r_1,...,r_N), where r_i is the position of atom i, V is the potential energy, and DBL_p is an operator that doubles the configuration in p periodic directions. V(DBL_p(r_1,...,r_N)) = -12.5574084319 2^p V(r_1,...,r_N) = -12.5574084319 Forces requirement: f_k(DBL_p(r_1,...,r_N)) = f_(k % N)(r_1,...,r_N), where r_i is the position of atom i, f_k is the force on atom k (where k runs from 1 to the number of atoms in the doubled configuration), DBL_p doubles the configuration in p periodic directions, N is the number of atoms in the original configuration, and % is the modulo operator. k f_k(DBL_p(r_1,...,r_N)) f_(k % N)(r_1,...,r_N) ------------------------------------------------------------------------------------------------------------------------ 0 -1.02670804e+01 -9.63975967e+00 -4.33085871e+00 | -1.02670804e+01 -9.63975967e+00 -4.33085871e+00 1 1.34720011e+01 8.26179751e+00 -4.26593182e+00 | 1.34720011e+01 8.26179751e+00 -4.26593182e+00 2 1.04263653e+01 -4.30382690e+00 2.84400256e+00 | 1.04263653e+01 -4.30382690e+00 2.84400256e+00 3 -1.36312859e+01 5.68178906e+00 5.75278797e+00 | -1.36312859e+01 5.68178906e+00 5.75278797e+00 4 -1.02670804e+01 -9.63975967e+00 -4.33085871e+00 | -1.02670804e+01 -9.63975967e+00 -4.33085871e+00 5 1.34720011e+01 8.26179751e+00 -4.26593182e+00 | 1.34720011e+01 8.26179751e+00 -4.26593182e+00 6 1.04263653e+01 -4.30382690e+00 2.84400256e+00 | 1.04263653e+01 -4.30382690e+00 2.84400256e+00 7 -1.36312859e+01 5.68178906e+00 5.75278797e+00 | -1.36312859e+01 5.68178906e+00 5.75278797e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ ======================================================================================================================== ======================================================================================================================== To pass this verification check the model must correctly support periodic boundary conditions for all configurations it was able to compute. Grade: P Comment: Periodic boundary conditions were correctly supported for all configurations that the model was able to compute. === Verification check vc-periodicity-support end (2018-05-10 21:41:33) ===