UPPAAL is an integrated tool environment for modeling, validation and verification of real-time systems modeled as networks of timed automata, extended with data types (bounded integers, arrays etc.).The tool has been developed in collaboration between the Design and Analysis of Real-Time Systems group at Uppsala University, Sweden and Basic Research in Computer Science at Aalborg University, Denmark.There are the following extensions available:Cora for Cost Optimal Reachability Analysis.Tron for Testing Real-time systems ON-line (black-box conformance testing).Cover for COVERerage-optimal off-line test generation.Tiga for TImed GAmes based controller synthesis.Port for component based timed systems, exploiting Partial Order Reduction Techniques.Pro for PRObabilistic reachability analysis.