The artifact that backs up the data in our ATVA 2023 Paper titled "Fast Verified SCCs for Probabilistic Model Checking". This artifact contains the proof files for Isabelle/HOL. Running the proofs yields a LLVM implementation of Gabow's algorithm that can be compiled to a dynamic library. This artifact also contains a version of the Modest toolset that can use this library to replace the built-in SCC algorithm. Lastly, the artifact contains scripts that reproduce the results in the paper. The additional reference contains a link to browsable version of the artifact that allows proofs to be inspected without downloading anything.