/usr/lib/ is in libsofa1-dev 1.0~beta4-12.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libphysicalmodel.so
/usr/lib/libsofacomponentmisc.so
/usr/lib/libsofacomponent.so
/usr/lib/libsofacomponentbase.so
/usr/lib/libsofacomponentmapping.so
/usr/lib/libsofacomponentmass.so
/usr/lib/libsofacomponentodesolver.so
/usr/lib/libsofacomponentmastersolver.so
/usr/lib/libload.so
/usr/lib/libminiFlowVR.so
/usr/lib/libsofacomponentbehaviormodel.so
/usr/lib/libsofacomponentcollision.so
/usr/lib/libsofacomponentconstraint.so
/usr/lib/libsofacomponentcontextobject.so
/usr/lib/libsofacomponentcontroller.so
/usr/lib/libsofacomponentengine.so
/usr/lib/libsofacomponentfem.so
/usr/lib/libsofacomponentforcefield.so
/usr/lib/libsofacomponentinteractionforcefield.so
/usr/lib/libsofacomponentlinearsolver.so
/usr/lib/libsofacomponentvisualmodel.so
/usr/lib/libsofacore.so
/usr/lib/libsofadefaulttype.so
/usr/lib/libsofagui.so
/usr/lib/libsofaguiglut.so
/usr/lib/libsofaguimain.so
/usr/lib/libsofaguiqt.so
/usr/lib/libsofahelper.so
/usr/lib/libsofamodeler.so
/usr/lib/libsofapml.so
/usr/lib/libsofasimulation.so
/usr/lib/libsofatree.so