Logic-based Program Synthesis And Transformation

This volume contains a selection of the papers presented at the 18th Inter- tionalSymposiumonLogic-BasedProgramSynthesisandTransformation(LOP- STR 2008) held during July 17-18, 2008 in Valencia, Spain. Information about ? the conference can be found at http://www.informatik.uni-kiel.de/ mh/ lopstr08. Previous LOPSTR symposia were held in Lyngby (2007), Venice (2006 and 1999), London (2005 and 2000), Verona (2004), Uppsala (2003), Madrid (2002), Paphos (2001), Manchester (1998, 1992, and 1991), Leuven (1997), Stockholm (1996), Arnhem (1995), Pisa (1994), and Louvain-la-Neuve (1993). The aim of the LOPSTR series is to stimulate and promote international research and collaboration on logic-based program development. LOPSTR t- ditionally solicits papers in the areas of speci?cation, synthesis, veri?cation, transformation,analysis,optimization,composition,security,reuse,applications andtools,component-basedsoftwaredevelopment,softwarearchitectures,age- basedsoftwaredevelopment,andprogramre?nement.LOPSTRhasareputation for being a lively, friendly forum for presenting and discussing work in progress. Formal proceedings are produced only after the symposium so that authors can incorporate feedback in the published papers. I would like to thank all those who submitted contributions to LOPSTR in the categories of full papers and extended abstracts. Each submission was reviewedbyatleastthreeProgramCommitteemembers.Thecommitteedecided to accept three full papers for immediate inclusion in the ?nal post-conference proceedings, and nine papers were accepted after revision and another round of reviewing. In addition to the accepted papers, the program also included an invited talk by Peter O'Hearn (University of London).