When referencing third-party modules, e.g. supplied by the compiler vendor, Coverity Fortran Syntax Analysis needs the interfaces to perform the analysis.
Coverity Fortran Syntax Analysis cannot read the .mod files as supplied by the vendor because they are proprietary binary files. If the source code with the interfaces is supplied by the vendor you can generate a Coverity Fortran Syntax Analysis library file containing the interfaces. See Coverity Fortran Syntax Analysis library files on how to generate the library file.
If the interface is not supplied in source code, you can compose it from the documentation as described in Specification of procedure interfaces.