This test used to take more than 10min because an instance of valgrind was launched for each separate equivalence check. The list of equivalences to checks are not given in a file, and only two valgrind instances are run. The test takes less than 15sec. * src/ltltest/equalsf.cc: New file. * src/ltltest/Makefile.am (reduccmp, reductaustr): Build using equalsf.cc. * src/ltltest/reduccmp.test: Rewrite. * src/ltltest/uwrm.test: Also rewrite, and use valgrind.