Free filtered states.
(emptiness_check_shy_eesrg): New class.
(emptiness_check_eesrg_shy): New function.
* iface/gspn/eesrg.hh (emptiness_check_eesrg_shy): New function.
* iface/gspn/ltlgspn.cc (main) [EESRG]: Handle -e3, -e4, and -e5.
* * src/tgbaalgos/gtec/gtec.hh, src/tgbaalgos/gtec/gtec.cc
(emptiness_check_shy::check): Move arc, num, succ_queue, and todo
as attributes.
(emptiness_check_shy::find_state): New virtual function.
numbered_state_heap_hash_map_factory): New class.
* src/tgbaalgos/gtec/nsheap.cc (numbered_state_heap_hash_map_factory):
Implement it.
* src/tgbaalgos/gtec/gtec.hh (emptiness_check::emptiness_check,
emptiness_check_shy::emptiness_check_shy): Take a
numbered_state_heap_factory argument.
* tgbaalgos/gtec/status.hh
(emptiness_check_status::emptiness_check_status): Likewise.
(emptiness_check_status::h): Make it a numbered_state_heap*.
* src/tgbaalgos/gtec/ce.cc, tgbaalgos/gtec/gtec.cc,
tgbaalgos/gtec/status.cc: Adjust uses of ecs_->h.