-- Synthesis and Transformation. -- Parallel Assembly Synthesis. -- Improving Logic Programs by Adding Functions. -- Decision Procedures. -- Deciding Knowledge Problems Modulo Classes of Permutative Theories. -- Binary Implication Hypergraphs for the Representation and Simplification of Propositional Formulae. -- Combined Abstract Congruence Closure for Theories with Associativity or Commutativity. -- A Certifying Algorithm for Linear (and Integer) Feasibility in Horn Constraint Systems. -- Deployment. -- Pick a Flavour: Towards Sustainable Deployment of Cloud-Edge Applications. -- Specification, Refactoring and Testing. -- An Axiomatic Category-Based Access Control Model for Smart Homes. -- Towards Specification-Guarded Refactoring. -- Impact and Performance of Randomized Test-Generation Using Prolog. -- Term and Graph Rewriting. -- Proving Uniqueness of Normal Forms wrt Reduction of Term Rewriting Systems. -- Rewriting Induction for Higher-Order Constrained Term Rewriting Systems. -- Introducing Quantification into a Hierarchical Graph Rewriting Language. -- Introducing Quantification into a Hierarchical Graph Rewriting Language.

This book constitutes the refereed proceedings of the 34th International Symposium on Logic-Based Program Synthesis and Transformation, LOPSTR 2024, held in Milan, Italy, during September 9–10, 2024. The 12 full papers and 1 short paper included in this book were carefully reviewed and selected from 28 submissions. They were organized in topical sections as follows: Synthesis and Transformation; Decision Procedures; Deployment; Specification, Refactoring and Testing; and Term and Graph Rewriting.