/usr/include/ is in libtrilinos-stratimikos-dev 12.12.1-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/trilinos/
/usr/include/trilinos/AztecOOParameterList.hpp
/usr/include/trilinos/BelosThyraAdapter.hpp
/usr/include/trilinos/Stratimikos_Config.h
/usr/include/trilinos/Stratimikos_ConfigDefs.hpp
/usr/include/trilinos/Stratimikos_DefaultLinearSolverBuilder.hpp
/usr/include/trilinos/Thyra_AmesosLinearOpWithSolve.hpp
/usr/include/trilinos/Thyra_AmesosLinearOpWithSolveFactory.hpp
/usr/include/trilinos/Thyra_AmesosTypes.hpp
/usr/include/trilinos/Thyra_AztecOOLinearOpWithSolve.hpp
/usr/include/trilinos/Thyra_AztecOOLinearOpWithSolveFactory.hpp
/usr/include/trilinos/Thyra_BelosLinearOpWithSolve.hpp
/usr/include/trilinos/Thyra_BelosLinearOpWithSolveFactory.hpp
/usr/include/trilinos/Thyra_BelosLinearOpWithSolveFactory_decl.hpp
/usr/include/trilinos/Thyra_BelosLinearOpWithSolveFactory_def.hpp
/usr/include/trilinos/Thyra_BelosLinearOpWithSolve_decl.hpp
/usr/include/trilinos/Thyra_BelosLinearOpWithSolve_def.hpp
/usr/include/trilinos/Thyra_DefaultRealLinearSolverBuilder.hpp
/usr/include/trilinos/Thyra_GeneralSolveCriteriaBelosStatusTest.hpp
/usr/include/trilinos/Thyra_GeneralSolveCriteriaBelosStatusTest_decl.hpp
/usr/include/trilinos/Thyra_GeneralSolveCriteriaBelosStatusTest_def.hpp
/usr/include/trilinos/Thyra_IfpackPreconditionerFactory.hpp
/usr/include/trilinos/Thyra_MLPreconditionerFactory.hpp
/usr/include/trilinos/Thyra_TsqrAdaptor.hpp