afl++ 4.04c-3ubuntu1 (amd64 binary) in ubuntu lunar

 American fuzzy lop is a fuzzer that employs compile-time instrumentation and
 genetic algorithms to automatically discover clean, interesting test cases
 that trigger new internal states in the targeted binary. This substantially
 improves the functional coverage for the fuzzed code. The compact synthesized
 corpora produced by the tool are also useful for seeding other, more labor- or
 resource-intensive testing regimes down the road.
 .
 afl++-fuzz is designed to be practical: it has modest performance
 overhead, uses a variety of highly effective fuzzing strategies, requires
 essentially no configuration, and seamlessly handles complex, real-world use
 cases - say, common image parsing or file compression libraries.
 .
 afl++ is a fork of the unmaintained afl.