This volume contains extended versions of papers presented at the Third International Workshop on Logic Program Synthesis and Transformation (LOPSTR 93) held in Louvain-la-Neuve in July 1993. Much of the success of the workshop is due to Yves Deville who served as Organizer and Chair. Many people believe that machine support for the development and evolution of software will play a critical role in future software engineering environments. Machine support requires the formalization of the artifacts and processes that arise during the software lifecycle. Logic languages are unique in providing a uniform declarative notation for precisely describing application domains, software requirements, and for prescribing behavior via logic programs. Program synthesis and transfonnation techniques formalize the process of developing correct and efficient programs from requirement specifications. The natural intersection of these two fields of research has been the focus of the LOPSTR workshops. The papers in this volume address many aspects of software develop­ ment including: deductive synthesis, inductive synthesis, transforma­ tions for optimizing programs and exploiting parallelism, program analysis techniques (particularly via abstract interpretation), meta­ programming languages and tool support, and various extensions to Prolog-like languages, admitting non-Horn clauses, functions, and constraints. Despite the progress represented in this volume, the transition from laboratory to practice is fraught with difficulties.

Inhalt

Toward the Synthesis of Constraint Propagation Algorithms.- A Formal View of Specification, Deductive Synthesis and Transformation of Logic Programs.- Reachability Analysis for the Extension Procedure - A Topological Result.- Inductive Synthesis of Logic Programs and Inductive Logic Programming.- Induction of Prolog Programs with Markus.- A General Technique for Automatically Generating Efficient Programs Through the Use of Proof Planning (Abstract).- Guiding Synthesis Proofs.- Combining Prolog Programs in a Techniques Editing System (Abstract).- Designing Prolog Programming Techniques.- Interactive Program Derivation Using Program Schemata and Incrementally Generated Strategies.- The Power of Partial Evaluation.- Specialising the Ground Representation in the Logic Programming Language Gödel.- Synthesis of Programs from Unfold/Fold Proofs.- Some Further Issues in Finite Unfolding (Abstract).- A Transformation Based on the Equality Between Terms.- Automatic Exploitation of Non-Determinate Independent And-Parallelism in the Basic Andorra Model.- Memoing with Abstract Answers and Delphi Lemmas.- Using Abstract Interpretation for Goal Replacement.- Mechanical Transformation of Logic Definitions Augmented with Type Information into Prolog Procedures: Some Experiments.- Author Index.