This open access set, LNAI 16688-16689, constitutes the proceedings of the 13th International Joint Conference, IJCAR 2026, held in Lisbon, Portugal, during July 26–29, 2026.
The 41 full research papers and 8 short papers included in these two volumes were carefully reviewed and selected from 112 submissions. The papers cover the following topical sections:
Part I: Theorem Proving and Automation; SAT, SMT, and Verification; Intuitionistic, Modal, and Temporal Logics;
Part II: Calculi, Proof Theory, and Decision Procedures; and Unification, Rewriting, and Computational Models.
Armin Biere
Open Access Automated reasoning Proof theory Modal and temporal logics Equational logic and rewriting Higher order logic Formal methods Software verification Model checking Theorem proving and SAT solving Program verification