Synopsys® (formerly SpringSoft) Verdi™ FSDB InterfaceCategory : Debug and AnalysisRiviera-PRO output FSDB files that work with Synopsys (formerly SpringSoft) Verdi and legacy Debussy debuggers. Riviera-PRO work with Synopsys products in post-processing mode(PSD). In the post-processing mode, simulation and debugging are performed in two separate stages.