Title: Pointer Analysis, Conditional Soundness, and Proving the Absence of Errors (NYU-CS-TR910) Authors: Christopher L. Conway, Dennis Dams, Kedar S. Namjoshi, and Clark Barrett Abstract: It is well known that the use of points-to information can substantially improve the accuracyof a static program analysis. Commonly used algorithms for computing points-to information are known to be sound only for memory-safe programs. Thus, it appears problematic to utilize points-to information to verify the memory safety property without giving up soundness. We show that a sound combination is possible, even if the points-to information is computed separately and only conditionally sound. This result is based on a refined statement of the soundness conditions of points-to analyses and a general mechanism for composing conditionally sound analyses.