!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!! !!!!! !!!!! 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 : MEAM_LAMMPS_WeiZhouLi_2019_BeO__MO_344044439515_001 Supported species : Be O random seed = 13 lattice constant (orig) = 3.000 perturbation amplitude = 0.300 number unit cells per side = 1 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Be, PBC = TTT (Configuration in file "config-Be-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)) = -92.00325825420668 2^p V(r_1,...,r_N) = -92.00325825420673 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 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 1 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 2 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 3 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 4 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 5 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 6 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 7 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 8 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 9 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 10 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 11 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 12 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 13 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 14 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 15 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 16 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 17 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 18 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 19 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 20 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 21 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 22 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 23 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 24 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 25 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 26 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 27 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 28 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 | 1.18416544e+00 -2.59534907e+00 -1.10643209e+00 29 -3.38053412e+00 1.49711924e+00 7.60799012e-01 | -3.38053412e+00 1.49711924e+00 7.60799012e-01 30 8.56366699e-01 4.37702952e-01 -1.21466412e+00 | 8.56366699e-01 4.37702952e-01 -1.21466412e+00 31 1.34000198e+00 6.60526881e-01 1.56029720e+00 | 1.34000198e+00 6.60526881e-01 1.56029720e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Be, PBC = TTF (Configuration in file "config-Be-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)) = -34.68750380103396 2^p V(r_1,...,r_N) = -34.68750380103393 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 -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 | -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 1 2.07280453e+00 1.95431003e+00 -1.58705608e+00 | 2.07280453e+00 1.95431003e+00 -1.58705608e+00 2 -8.94249957e-01 2.63412417e-01 1.40164629e+00 | -8.94249957e-01 2.63412417e-01 1.40164629e+00 3 -4.20790331e-01 -8.28562612e-01 1.62179931e+00 | -4.20790331e-01 -8.28562612e-01 1.62179931e+00 4 -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 | -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 5 2.07280453e+00 1.95431003e+00 -1.58705608e+00 | 2.07280453e+00 1.95431003e+00 -1.58705608e+00 6 -8.94249957e-01 2.63412417e-01 1.40164629e+00 | -8.94249957e-01 2.63412417e-01 1.40164629e+00 7 -4.20790331e-01 -8.28562612e-01 1.62179931e+00 | -4.20790331e-01 -8.28562612e-01 1.62179931e+00 8 -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 | -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 9 2.07280453e+00 1.95431003e+00 -1.58705608e+00 | 2.07280453e+00 1.95431003e+00 -1.58705608e+00 10 -8.94249957e-01 2.63412417e-01 1.40164629e+00 | -8.94249957e-01 2.63412417e-01 1.40164629e+00 11 -4.20790331e-01 -8.28562612e-01 1.62179931e+00 | -4.20790331e-01 -8.28562612e-01 1.62179931e+00 12 -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 | -7.57764244e-01 -1.38915983e+00 -1.43638952e+00 13 2.07280453e+00 1.95431003e+00 -1.58705608e+00 | 2.07280453e+00 1.95431003e+00 -1.58705608e+00 14 -8.94249957e-01 2.63412417e-01 1.40164629e+00 | -8.94249957e-01 2.63412417e-01 1.40164629e+00 15 -4.20790331e-01 -8.28562612e-01 1.62179931e+00 | -4.20790331e-01 -8.28562612e-01 1.62179931e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Be, PBC = TFT (Configuration in file "config-Be-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)) = -32.937254087412114 2^p V(r_1,...,r_N) = -32.93725408741211 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 1.54788182e+00 -2.46784425e+00 2.28600600e-01 | 1.54788182e+00 -2.46784425e+00 2.28600600e-01 1 -5.71628955e-01 2.81297224e+00 2.61921313e-02 | -5.71628955e-01 2.81297224e+00 2.61921313e-02 2 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 | 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 3 -1.57055539e+00 2.19700960e+00 1.17446186e+00 | -1.57055539e+00 2.19700960e+00 1.17446186e+00 4 1.54788182e+00 -2.46784425e+00 2.28600600e-01 | 1.54788182e+00 -2.46784425e+00 2.28600600e-01 5 -5.71628955e-01 2.81297224e+00 2.61921313e-02 | -5.71628955e-01 2.81297224e+00 2.61921313e-02 6 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 | 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 7 -1.57055539e+00 2.19700960e+00 1.17446186e+00 | -1.57055539e+00 2.19700960e+00 1.17446186e+00 8 1.54788182e+00 -2.46784425e+00 2.28600600e-01 | 1.54788182e+00 -2.46784425e+00 2.28600600e-01 9 -5.71628955e-01 2.81297224e+00 2.61921313e-02 | -5.71628955e-01 2.81297224e+00 2.61921313e-02 10 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 | 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 11 -1.57055539e+00 2.19700960e+00 1.17446186e+00 | -1.57055539e+00 2.19700960e+00 1.17446186e+00 12 1.54788182e+00 -2.46784425e+00 2.28600600e-01 | 1.54788182e+00 -2.46784425e+00 2.28600600e-01 13 -5.71628955e-01 2.81297224e+00 2.61921313e-02 | -5.71628955e-01 2.81297224e+00 2.61921313e-02 14 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 | 5.94302531e-01 -2.54213759e+00 -1.42925459e+00 15 -1.57055539e+00 2.19700960e+00 1.17446186e+00 | -1.57055539e+00 2.19700960e+00 1.17446186e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Be, PBC = TFF (Configuration in file "config-Be-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)) = -13.843272010478088 2^p V(r_1,...,r_N) = -13.843272010478081 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 -5.12791508e-01 -1.13056441e+00 -4.80069621e-01 | -5.12791508e-01 -1.13056441e+00 -4.80069621e-01 1 3.51413227e-01 1.19080184e+00 -7.87734988e-01 | 3.51413227e-01 1.19080184e+00 -7.87734988e-01 2 -3.14062904e+00 -3.47843329e+00 8.19351075e-01 | -3.14062904e+00 -3.47843329e+00 8.19351075e-01 3 3.30200732e+00 3.41819586e+00 4.48453533e-01 | 3.30200732e+00 3.41819586e+00 4.48453533e-01 4 -5.12791508e-01 -1.13056441e+00 -4.80069621e-01 | -5.12791508e-01 -1.13056441e+00 -4.80069621e-01 5 3.51413227e-01 1.19080184e+00 -7.87734988e-01 | 3.51413227e-01 1.19080184e+00 -7.87734988e-01 6 -3.14062904e+00 -3.47843329e+00 8.19351075e-01 | -3.14062904e+00 -3.47843329e+00 8.19351075e-01 7 3.30200732e+00 3.41819586e+00 4.48453533e-01 | 3.30200732e+00 3.41819586e+00 4.48453533e-01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Be, PBC = FTT (Configuration in file "config-Be-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)) = -30.852198506943868 2^p V(r_1,...,r_N) = -30.852198506943818 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 -1.90026703e+00 -1.76561227e+00 3.25368593e+00 | -1.90026703e+00 -1.76561227e+00 3.25368593e+00 1 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 | 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 2 2.13961570e+00 1.39942157e+00 -1.34001080e-01 | 2.13961570e+00 1.39942157e+00 -1.34001080e-01 3 -1.55336813e+00 2.31634400e+00 -2.45846470e+00 | -1.55336813e+00 2.31634400e+00 -2.45846470e+00 4 -1.90026703e+00 -1.76561227e+00 3.25368593e+00 | -1.90026703e+00 -1.76561227e+00 3.25368593e+00 5 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 | 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 6 2.13961570e+00 1.39942157e+00 -1.34001080e-01 | 2.13961570e+00 1.39942157e+00 -1.34001080e-01 7 -1.55336813e+00 2.31634400e+00 -2.45846470e+00 | -1.55336813e+00 2.31634400e+00 -2.45846470e+00 8 -1.90026703e+00 -1.76561227e+00 3.25368593e+00 | -1.90026703e+00 -1.76561227e+00 3.25368593e+00 9 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 | 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 10 2.13961570e+00 1.39942157e+00 -1.34001080e-01 | 2.13961570e+00 1.39942157e+00 -1.34001080e-01 11 -1.55336813e+00 2.31634400e+00 -2.45846470e+00 | -1.55336813e+00 2.31634400e+00 -2.45846470e+00 12 -1.90026703e+00 -1.76561227e+00 3.25368593e+00 | -1.90026703e+00 -1.76561227e+00 3.25368593e+00 13 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 | 1.31401946e+00 -1.95015330e+00 -6.61220148e-01 14 2.13961570e+00 1.39942157e+00 -1.34001080e-01 | 2.13961570e+00 1.39942157e+00 -1.34001080e-01 15 -1.55336813e+00 2.31634400e+00 -2.45846470e+00 | -1.55336813e+00 2.31634400e+00 -2.45846470e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Be, PBC = FTF (Configuration in file "config-Be-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)) = -13.822134692674103 2^p V(r_1,...,r_N) = -13.822134692674098 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 -2.20524373e+00 -2.04305848e-01 -2.58170212e+00 | -2.20524373e+00 -2.04305848e-01 -2.58170212e+00 1 1.92982317e+00 -1.15211647e+00 -2.44420645e+00 | 1.92982317e+00 -1.15211647e+00 -2.44420645e+00 2 2.48184502e+00 5.01942544e-01 3.05960807e+00 | 2.48184502e+00 5.01942544e-01 3.05960807e+00 3 -2.20642446e+00 8.54479775e-01 1.96630050e+00 | -2.20642446e+00 8.54479775e-01 1.96630050e+00 4 -2.20524373e+00 -2.04305848e-01 -2.58170212e+00 | -2.20524373e+00 -2.04305848e-01 -2.58170212e+00 5 1.92982317e+00 -1.15211647e+00 -2.44420645e+00 | 1.92982317e+00 -1.15211647e+00 -2.44420645e+00 6 2.48184502e+00 5.01942544e-01 3.05960807e+00 | 2.48184502e+00 5.01942544e-01 3.05960807e+00 7 -2.20642446e+00 8.54479775e-01 1.96630050e+00 | -2.20642446e+00 8.54479775e-01 1.96630050e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = Be, PBC = FFT (Configuration in file "config-Be-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)) = -11.77149695020092 2^p V(r_1,...,r_N) = -11.771496950200921 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 -2.40850350e+00 -2.59554560e+00 1.48908212e+00 | -2.40850350e+00 -2.59554560e+00 1.48908212e+00 1 1.99555218e+00 2.49009014e+00 7.35467610e-01 | 1.99555218e+00 2.49009014e+00 7.35467610e-01 2 4.75163858e+00 -4.20594727e+00 -1.16561438e+00 | 4.75163858e+00 -4.20594727e+00 -1.16561438e+00 3 -4.33868726e+00 4.31140274e+00 -1.05893535e+00 | -4.33868726e+00 4.31140274e+00 -1.05893535e+00 4 -2.40850350e+00 -2.59554560e+00 1.48908212e+00 | -2.40850350e+00 -2.59554560e+00 1.48908212e+00 5 1.99555218e+00 2.49009014e+00 7.35467610e-01 | 1.99555218e+00 2.49009014e+00 7.35467610e-01 6 4.75163858e+00 -4.20594727e+00 -1.16561438e+00 | 4.75163858e+00 -4.20594727e+00 -1.16561438e+00 7 -4.33868726e+00 4.31140274e+00 -1.05893535e+00 | -4.33868726e+00 4.31140274e+00 -1.05893535e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = O, PBC = TTT (Configuration in file "config-O-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)) = 273.32451141057277 2^p V(r_1,...,r_N) = 273.32451141057265 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 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 1 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 2 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 3 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 4 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 5 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 6 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 7 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 8 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 9 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 10 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 11 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 12 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 13 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 14 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 15 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 16 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 17 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 18 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 19 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 20 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 21 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 22 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 23 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 24 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 25 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 26 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 27 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 28 1.41755373e+01 1.41041200e+01 -1.40209425e+01 | 1.41755373e+01 1.41041200e+01 -1.40209425e+01 29 -1.30632287e+01 -4.31202988e+00 1.53491187e+01 | -1.30632287e+01 -4.31202988e+00 1.53491187e+01 30 2.07156849e+00 6.29305608e+00 5.55667440e+00 | 2.07156849e+00 6.29305608e+00 5.55667440e+00 31 -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 | -3.18387709e+00 -1.60851462e+01 -6.88485054e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = O, PBC = TTF (Configuration in file "config-O-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)) = 146.1753960658424 2^p V(r_1,...,r_N) = 146.17539606584236 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 3.61790345e+00 3.77913173e+00 -5.33738123e+00 | 3.61790345e+00 3.77913173e+00 -5.33738123e+00 1 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 | 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 2 -5.27199535e+00 7.07042608e+00 6.45942015e+00 | -5.27199535e+00 7.07042608e+00 6.45942015e+00 3 -2.30598336e+00 -6.79053738e+00 2.38437799e+00 | -2.30598336e+00 -6.79053738e+00 2.38437799e+00 4 3.61790345e+00 3.77913173e+00 -5.33738123e+00 | 3.61790345e+00 3.77913173e+00 -5.33738123e+00 5 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 | 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 6 -5.27199535e+00 7.07042608e+00 6.45942015e+00 | -5.27199535e+00 7.07042608e+00 6.45942015e+00 7 -2.30598336e+00 -6.79053738e+00 2.38437799e+00 | -2.30598336e+00 -6.79053738e+00 2.38437799e+00 8 3.61790345e+00 3.77913173e+00 -5.33738123e+00 | 3.61790345e+00 3.77913173e+00 -5.33738123e+00 9 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 | 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 10 -5.27199535e+00 7.07042608e+00 6.45942015e+00 | -5.27199535e+00 7.07042608e+00 6.45942015e+00 11 -2.30598336e+00 -6.79053738e+00 2.38437799e+00 | -2.30598336e+00 -6.79053738e+00 2.38437799e+00 12 3.61790345e+00 3.77913173e+00 -5.33738123e+00 | 3.61790345e+00 3.77913173e+00 -5.33738123e+00 13 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 | 3.96007526e+00 -4.05902044e+00 -3.50641691e+00 14 -5.27199535e+00 7.07042608e+00 6.45942015e+00 | -5.27199535e+00 7.07042608e+00 6.45942015e+00 15 -2.30598336e+00 -6.79053738e+00 2.38437799e+00 | -2.30598336e+00 -6.79053738e+00 2.38437799e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = O, PBC = TFT (Configuration in file "config-O-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)) = 129.7502125057369 2^p V(r_1,...,r_N) = 129.75021250573684 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 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 | 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 1 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 | 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 2 -9.30749063e+00 2.36513933e+00 1.53075448e+01 | -9.30749063e+00 2.36513933e+00 1.53075448e+01 3 -6.73069524e+00 2.51705406e+00 -3.99381755e+00 | -6.73069524e+00 2.51705406e+00 -3.99381755e+00 4 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 | 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 5 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 | 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 6 -9.30749063e+00 2.36513933e+00 1.53075448e+01 | -9.30749063e+00 2.36513933e+00 1.53075448e+01 7 -6.73069524e+00 2.51705406e+00 -3.99381755e+00 | -6.73069524e+00 2.51705406e+00 -3.99381755e+00 8 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 | 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 9 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 | 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 10 -9.30749063e+00 2.36513933e+00 1.53075448e+01 | -9.30749063e+00 2.36513933e+00 1.53075448e+01 11 -6.73069524e+00 2.51705406e+00 -3.99381755e+00 | -6.73069524e+00 2.51705406e+00 -3.99381755e+00 12 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 | 1.17632123e+01 -2.47717111e+00 -3.95963506e+00 13 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 | 4.27497353e+00 -2.40502228e+00 -7.35409220e+00 14 -9.30749063e+00 2.36513933e+00 1.53075448e+01 | -9.30749063e+00 2.36513933e+00 1.53075448e+01 15 -6.73069524e+00 2.51705406e+00 -3.99381755e+00 | -6.73069524e+00 2.51705406e+00 -3.99381755e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = O, PBC = TFF (Configuration in file "config-O-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)) = 29.61825878946164 2^p V(r_1,...,r_N) = 29.618258789461635 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 9.11719780e+00 2.48649613e+00 -1.19140834e+01 | 9.11719780e+00 2.48649613e+00 -1.19140834e+01 1 -9.74428542e+00 -1.17710837e+01 8.98969536e+00 | -9.74428542e+00 -1.17710837e+01 8.98969536e+00 2 -5.12252249e+00 -2.57549356e+00 3.41423664e-01 | -5.12252249e+00 -2.57549356e+00 3.41423664e-01 3 5.74961011e+00 1.18600811e+01 2.58296441e+00 | 5.74961011e+00 1.18600811e+01 2.58296441e+00 4 9.11719780e+00 2.48649613e+00 -1.19140834e+01 | 9.11719780e+00 2.48649613e+00 -1.19140834e+01 5 -9.74428542e+00 -1.17710837e+01 8.98969536e+00 | -9.74428542e+00 -1.17710837e+01 8.98969536e+00 6 -5.12252249e+00 -2.57549356e+00 3.41423664e-01 | -5.12252249e+00 -2.57549356e+00 3.41423664e-01 7 5.74961011e+00 1.18600811e+01 2.58296441e+00 | 5.74961011e+00 1.18600811e+01 2.58296441e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = O, PBC = FTT (Configuration in file "config-O-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)) = 116.24270698975903 2^p V(r_1,...,r_N) = 116.24270698975899 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 -7.46373436e+00 1.12550141e+00 7.65802239e+00 | -7.46373436e+00 1.12550141e+00 7.65802239e+00 1 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 | 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 2 -1.26076580e+01 1.42383036e+01 1.05938078e+01 | -1.26076580e+01 1.42383036e+01 1.05938078e+01 3 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 | 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 4 -7.46373436e+00 1.12550141e+00 7.65802239e+00 | -7.46373436e+00 1.12550141e+00 7.65802239e+00 5 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 | 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 6 -1.26076580e+01 1.42383036e+01 1.05938078e+01 | -1.26076580e+01 1.42383036e+01 1.05938078e+01 7 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 | 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 8 -7.46373436e+00 1.12550141e+00 7.65802239e+00 | -7.46373436e+00 1.12550141e+00 7.65802239e+00 9 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 | 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 10 -1.26076580e+01 1.42383036e+01 1.05938078e+01 | -1.26076580e+01 1.42383036e+01 1.05938078e+01 11 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 | 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 12 -7.46373436e+00 1.12550141e+00 7.65802239e+00 | -7.46373436e+00 1.12550141e+00 7.65802239e+00 13 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 | 1.37005889e+01 -8.48865171e+00 -4.20440539e+00 14 -1.26076580e+01 1.42383036e+01 1.05938078e+01 | -1.26076580e+01 1.42383036e+01 1.05938078e+01 15 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 | 6.37080342e+00 -6.87515326e+00 -1.40474247e+01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = O, PBC = FTF (Configuration in file "config-O-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)) = 33.27749883106922 2^p V(r_1,...,r_N) = 33.27749883106922 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 -2.71561835e+00 -3.15047111e+00 -3.57664312e+00 | -2.71561835e+00 -3.15047111e+00 -3.57664312e+00 1 3.71280571e+00 3.16188733e+00 -3.57591935e+00 | 3.71280571e+00 3.16188733e+00 -3.57591935e+00 2 2.04086559e+00 1.26151280e+00 3.38169860e+00 | 2.04086559e+00 1.26151280e+00 3.38169860e+00 3 -3.03805294e+00 -1.27292902e+00 3.77086386e+00 | -3.03805294e+00 -1.27292902e+00 3.77086386e+00 4 -2.71561835e+00 -3.15047111e+00 -3.57664312e+00 | -2.71561835e+00 -3.15047111e+00 -3.57664312e+00 5 3.71280571e+00 3.16188733e+00 -3.57591935e+00 | 3.71280571e+00 3.16188733e+00 -3.57591935e+00 6 2.04086559e+00 1.26151280e+00 3.38169860e+00 | 2.04086559e+00 1.26151280e+00 3.38169860e+00 7 -3.03805294e+00 -1.27292902e+00 3.77086386e+00 | -3.03805294e+00 -1.27292902e+00 3.77086386e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MONOATOMIC STRUCTURE -- Species = O, PBC = FFT (Configuration in file "config-O-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)) = 36.904593568500026 2^p V(r_1,...,r_N) = 36.904593568500026 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 3.76511749e+00 -6.25484268e+00 4.88301459e+00 | 3.76511749e+00 -6.25484268e+00 4.88301459e+00 1 -1.35098940e+01 -9.33824199e+00 -4.90707638e+00 | -1.35098940e+01 -9.33824199e+00 -4.90707638e+00 2 5.75929911e+00 1.96951094e+00 -2.16496114e+00 | 5.75929911e+00 1.96951094e+00 -2.16496114e+00 3 3.98547736e+00 1.36235737e+01 2.18902294e+00 | 3.98547736e+00 1.36235737e+01 2.18902294e+00 4 3.76511749e+00 -6.25484268e+00 4.88301459e+00 | 3.76511749e+00 -6.25484268e+00 4.88301459e+00 5 -1.35098940e+01 -9.33824199e+00 -4.90707638e+00 | -1.35098940e+01 -9.33824199e+00 -4.90707638e+00 6 5.75929911e+00 1.96951094e+00 -2.16496114e+00 | 5.75929911e+00 1.96951094e+00 -2.16496114e+00 7 3.98547736e+00 1.36235737e+01 2.18902294e+00 | 3.98547736e+00 1.36235737e+01 2.18902294e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MIXED STRUCTURE -- Species = Be O, PBC = TTT (Configuration in file "config-BeO-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)) = -18.563230799610757 2^p V(r_1,...,r_N) = -18.563230799610714 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 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 1 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 2 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 3 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 4 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 5 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 6 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 7 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 8 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 9 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 10 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 11 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 12 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 13 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 14 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 15 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 16 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 17 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 18 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 19 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 20 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 21 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 22 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 23 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 24 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 25 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 26 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 27 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 28 2.53640605e+00 4.27547966e+00 1.30486765e+00 | 2.53640605e+00 4.27547966e+00 1.30486765e+00 29 -4.41454872e+00 -3.89567505e+00 1.56938469e+00 | -4.41454872e+00 -3.89567505e+00 1.56938469e+00 30 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 | 2.86747949e+00 -1.74945483e+00 -3.70001667e+00 31 -9.89336812e-01 1.36965022e+00 8.25764340e-01 | -9.89336812e-01 1.36965022e+00 8.25764340e-01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MIXED STRUCTURE -- Species = Be O, PBC = TTF (Configuration in file "config-BeO-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)) = 3.8730896908462715 2^p V(r_1,...,r_N) = 3.873089690846252 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 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 | 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 1 -2.06540587e+00 1.43508927e+00 -1.84218764e+00 | -2.06540587e+00 1.43508927e+00 -1.84218764e+00 2 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 | 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 3 2.25863879e-01 1.39916983e+00 3.86997180e+00 | 2.25863879e-01 1.39916983e+00 3.86997180e+00 4 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 | 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 5 -2.06540587e+00 1.43508927e+00 -1.84218764e+00 | -2.06540587e+00 1.43508927e+00 -1.84218764e+00 6 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 | 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 7 2.25863879e-01 1.39916983e+00 3.86997180e+00 | 2.25863879e-01 1.39916983e+00 3.86997180e+00 8 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 | 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 9 -2.06540587e+00 1.43508927e+00 -1.84218764e+00 | -2.06540587e+00 1.43508927e+00 -1.84218764e+00 10 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 | 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 11 2.25863879e-01 1.39916983e+00 3.86997180e+00 | 2.25863879e-01 1.39916983e+00 3.86997180e+00 12 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 | 8.64917937e-01 -1.45256548e+00 -1.26686925e+00 13 -2.06540587e+00 1.43508927e+00 -1.84218764e+00 | -2.06540587e+00 1.43508927e+00 -1.84218764e+00 14 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 | 9.74624056e-01 -1.38169362e+00 -7.60914907e-01 15 2.25863879e-01 1.39916983e+00 3.86997180e+00 | 2.25863879e-01 1.39916983e+00 3.86997180e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MIXED STRUCTURE -- Species = Be O, PBC = TFT (Configuration in file "config-BeO-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)) = 3.388567170612381 2^p V(r_1,...,r_N) = 3.3885671706123897 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 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 | 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 1 -2.08445720e+00 3.53369898e-01 -3.72869365e-01 | -2.08445720e+00 3.53369898e-01 -3.72869365e-01 2 -1.25165816e+00 5.93076230e-01 1.69726916e+00 | -1.25165816e+00 5.93076230e-01 1.69726916e+00 3 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 | 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 4 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 | 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 5 -2.08445720e+00 3.53369898e-01 -3.72869365e-01 | -2.08445720e+00 3.53369898e-01 -3.72869365e-01 6 -1.25165816e+00 5.93076230e-01 1.69726916e+00 | -1.25165816e+00 5.93076230e-01 1.69726916e+00 7 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 | 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 8 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 | 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 9 -2.08445720e+00 3.53369898e-01 -3.72869365e-01 | -2.08445720e+00 3.53369898e-01 -3.72869365e-01 10 -1.25165816e+00 5.93076230e-01 1.69726916e+00 | -1.25165816e+00 5.93076230e-01 1.69726916e+00 11 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 | 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 12 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 | 8.28836795e-01 -4.74188976e-01 -5.90608323e-01 13 -2.08445720e+00 3.53369898e-01 -3.72869365e-01 | -2.08445720e+00 3.53369898e-01 -3.72869365e-01 14 -1.25165816e+00 5.93076230e-01 1.69726916e+00 | -1.25165816e+00 5.93076230e-01 1.69726916e+00 15 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 | 2.50727856e+00 -4.72257152e-01 -7.33791471e-01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MIXED STRUCTURE -- Species = Be O, PBC = TFF (Configuration in file "config-BeO-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)) = -3.1661315677019046 2^p V(r_1,...,r_N) = -3.1661315677019086 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 1.82572045e-01 1.46033104e+00 -1.20511767e+00 | 1.82572045e-01 1.46033104e+00 -1.20511767e+00 1 4.82969363e-01 -1.25214930e+00 4.11800983e-01 | 4.82969363e-01 -1.25214930e+00 4.11800983e-01 2 -1.36071349e-01 1.12949567e+00 1.44437265e+00 | -1.36071349e-01 1.12949567e+00 1.44437265e+00 3 -5.29470059e-01 -1.33767741e+00 -6.51055963e-01 | -5.29470059e-01 -1.33767741e+00 -6.51055963e-01 4 1.82572045e-01 1.46033104e+00 -1.20511767e+00 | 1.82572045e-01 1.46033104e+00 -1.20511767e+00 5 4.82969363e-01 -1.25214930e+00 4.11800983e-01 | 4.82969363e-01 -1.25214930e+00 4.11800983e-01 6 -1.36071349e-01 1.12949567e+00 1.44437265e+00 | -1.36071349e-01 1.12949567e+00 1.44437265e+00 7 -5.29470059e-01 -1.33767741e+00 -6.51055963e-01 | -5.29470059e-01 -1.33767741e+00 -6.51055963e-01 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MIXED STRUCTURE -- Species = Be O, PBC = FTT (Configuration in file "config-BeO-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)) = 4.0995387740557545 2^p V(r_1,...,r_N) = 4.0995387740557865 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 -5.65218662e-01 -2.03215417e+00 2.96852179e+00 | -5.65218662e-01 -2.03215417e+00 2.96852179e+00 1 -3.15659258e-01 3.22966956e+00 -2.73660831e-01 | -3.15659258e-01 3.22966956e+00 -2.73660831e-01 2 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 | 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 3 -3.13480431e-01 1.09510371e+00 -1.98238407e+00 | -3.13480431e-01 1.09510371e+00 -1.98238407e+00 4 -5.65218662e-01 -2.03215417e+00 2.96852179e+00 | -5.65218662e-01 -2.03215417e+00 2.96852179e+00 5 -3.15659258e-01 3.22966956e+00 -2.73660831e-01 | -3.15659258e-01 3.22966956e+00 -2.73660831e-01 6 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 | 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 7 -3.13480431e-01 1.09510371e+00 -1.98238407e+00 | -3.13480431e-01 1.09510371e+00 -1.98238407e+00 8 -5.65218662e-01 -2.03215417e+00 2.96852179e+00 | -5.65218662e-01 -2.03215417e+00 2.96852179e+00 9 -3.15659258e-01 3.22966956e+00 -2.73660831e-01 | -3.15659258e-01 3.22966956e+00 -2.73660831e-01 10 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 | 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 11 -3.13480431e-01 1.09510371e+00 -1.98238407e+00 | -3.13480431e-01 1.09510371e+00 -1.98238407e+00 12 -5.65218662e-01 -2.03215417e+00 2.96852179e+00 | -5.65218662e-01 -2.03215417e+00 2.96852179e+00 13 -3.15659258e-01 3.22966956e+00 -2.73660831e-01 | -3.15659258e-01 3.22966956e+00 -2.73660831e-01 14 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 | 1.19435835e+00 -2.29261909e+00 -7.12476892e-01 15 -3.13480431e-01 1.09510371e+00 -1.98238407e+00 | -3.13480431e-01 1.09510371e+00 -1.98238407e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MIXED STRUCTURE -- Species = Be O, PBC = FTF (Configuration in file "config-BeO-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)) = -6.2948526826209 2^p V(r_1,...,r_N) = -6.294852682620901 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 -3.50633992e+00 2.37855375e+00 -7.24889712e+00 | -3.50633992e+00 2.37855375e+00 -7.24889712e+00 1 -3.59096221e+00 -2.05097054e+00 3.29692837e+00 | -3.59096221e+00 -2.05097054e+00 3.29692837e+00 2 4.86638474e+00 5.03013913e+00 7.63369173e+00 | 4.86638474e+00 5.03013913e+00 7.63369173e+00 3 2.23091739e+00 -5.35772234e+00 -3.68172298e+00 | 2.23091739e+00 -5.35772234e+00 -3.68172298e+00 4 -3.50633992e+00 2.37855375e+00 -7.24889712e+00 | -3.50633992e+00 2.37855375e+00 -7.24889712e+00 5 -3.59096221e+00 -2.05097054e+00 3.29692837e+00 | -3.59096221e+00 -2.05097054e+00 3.29692837e+00 6 4.86638474e+00 5.03013913e+00 7.63369173e+00 | 4.86638474e+00 5.03013913e+00 7.63369173e+00 7 2.23091739e+00 -5.35772234e+00 -3.68172298e+00 | 2.23091739e+00 -5.35772234e+00 -3.68172298e+00 ------------------------------------------------------------------------------------------------------------------------ PASS: Energies and forces are the same to within a relative error of 1e-08 ------------------------------------------------------------------------------------------------------------------------ MIXED STRUCTURE -- Species = Be O, PBC = FFT (Configuration in file "config-BeO-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)) = -6.259617259491855 2^p V(r_1,...,r_N) = -6.259617259491853 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 1.68450457e+00 -5.12352893e-01 -1.35548210e+00 | 1.68450457e+00 -5.12352893e-01 -1.35548210e+00 1 -4.22886845e-01 2.12961655e-01 -7.99391017e-01 | -4.22886845e-01 2.12961655e-01 -7.99391017e-01 2 -1.49463596e+00 -5.68013204e-01 2.61259756e+00 | -1.49463596e+00 -5.68013204e-01 2.61259756e+00 3 2.33018236e-01 8.67404441e-01 -4.57724447e-01 | 2.33018236e-01 8.67404441e-01 -4.57724447e-01 4 1.68450457e+00 -5.12352893e-01 -1.35548210e+00 | 1.68450457e+00 -5.12352893e-01 -1.35548210e+00 5 -4.22886845e-01 2.12961655e-01 -7.99391017e-01 | -4.22886845e-01 2.12961655e-01 -7.99391017e-01 6 -1.49463596e+00 -5.68013204e-01 2.61259756e+00 | -1.49463596e+00 -5.68013204e-01 2.61259756e+00 7 2.33018236e-01 8.67404441e-01 -4.57724447e-01 | 2.33018236e-01 8.67404441e-01 -4.57724447e-01 ------------------------------------------------------------------------------------------------------------------------ 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.