  Model-based testing of software and hardware systems uses behavioral and
formal models of the systems. The paper presents a technique for model-based
black-box conformance testing of real-time systems using Labeled Prioritized
Time Petri Nets (LPrTPN). The Timed Input/Output Conformance (tioco) relation,
which takes environment assumptions into account, serves as reference to decide
of implementation correctness. Test suites are derived automatically from a
LPrTPN made up of two concurrent sub-nets that respectively specify the system
under test and its environment. The result is optimal in the sense that test
cases have the shortest possible accumulated time to be executed. Test cases
selection combines test purposes and structural coverage criteria associated
with the model. A test purpose or a coverage criterion is specified in a SE-LTL
formula. The TIme Petri Net Analyzer TINA has been extended to support
concurrent composed subnets. Automatic generation of time-optimal test suites
with the Tina toolbox combines the model checker selt and the path analyzer
plan. selt outputs a sequence that satisfies the logic formula. plan computes
the fastest execution of this sequence which will be transformed in a test
cases suite.
