ASASP: automated symbolic analysis of security policies. We describe asasp, a symbolic reachability procedure for the analysis of administrative access control policies. The tool represents access policies and their administrative actions as formulae of the Bernays-Shönfinkel-Ramsey class and then uses a symbolic reachability procedure to solve security analysis problems. Checks for fix-point-reduced to satisfiability problems-are mechanized by Satisfiability Modulo Theories solving and Automated Theorem Proving. asasp has been successfully applied to the analysis of benchmark problems arising in (extensions of) the Role-Based Access Control model. Our tool shows better scalability than a state-of-the-art tool on a significant set of instances of these problems.