After extracting and compiling at least one of Lingeling or PicoSAT in '../lingeling' respectively '../picosat' issue: ./configure && make This also builds 'testlimboole' and 'dimacs2boole'. You can also compile with debugging support, or force inclusion of only one of PicoSAT or Lingeling, e.g., see './configure.sh -h'. Armin Biere Mon Oct 7 16:34:15 CEST 2013