Matplotlib created a temporary config/cache directory at /tmp/matplotlib-0i169u2t because the default path (/var/www/.config/matplotlib) is not a writable directory; it is highly recommended to set the MPLCONFIGDIR environment variable to a writable directory, in particular to speed up the import of Matplotlib and to better support multiprocessing.
/usr/lib/python3/dist-packages/ase/utils/__init__.py:62: FutureWarning: Please use atoms.cell.reciprocal()
  warnings.warn(warning)
INFO: Creating lattice/cell object from /var/www/html/data/material_modeling/CuO.cif-QuantumEspresso-farhie-20231009-091136/CuO.cif
INFO: supercell   = [2 2 2]
INFO: kpoints     = [3 3 3]
INFO: kpts_density= 1728
INFO: directory   = /var/www/html/data/material_modeling/CuO.cif-QuantumEspresso-farhie-20231009-091136/
INFO: Cu4O4 Bravais lattive: CUB(a=4.23312); Spacegroup: F m -3 m (225)
INFO: Creating calculator QUANTUMESPRESSO
INFO: Starting computations in file:///var/www/html/data/material_modeling/CuO.cif-QuantumEspresso-farhie-20231009-091136/ [Mon Oct  9 09:11:39 2023]
INFO: Computing ground state.
INFO: Computing electronic density of states.
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
INFO: Computing electronic band structure along BZ path.
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
INFO: Computing electronic band structure 3D grid.
INFO: Saving results into file:///var/www/html/data/material_modeling/CuO.cif-QuantumEspresso-farhie-20231009-091136/ [Mon Oct  9 09:15:36 2023]