Open tquatmann opened 7 months ago
When computing Pmin=? [F x=2 || x=1] for the following PRISM Program, with Storm we get 0, although 0.3 should be correct.
Pmin=? [F x=2 || x=1]
0
0.3
mdp module main x : [0..2]; [] x=0 -> 0.7 : (x'=1) + 0.3 : (x'=2); [] x=1 -> 1 : (x'=1); [] x=2 -> 1 : (x'=1); endmodule
Storm 1.8.2 (dev) Date: Wed Feb 28 12:55:15 2024 Command line arguments: --prism conditional.nm -prop 'Pmin=? [F x=2 || F x=1 ]' Current working directory: Time for model input parsing: 0.000s. Time for model construction: 0.010s. -------------------------------------------------------------- Model type: MDP (sparse) States: 3 Transitions: 4 Choices: 3 Reward Models: none State Labels: 4 labels * init -> 1 item(s) * deadlock -> 0 item(s) * (x = 2) -> 1 item(s) * (x = 1) -> 1 item(s) Choice Labels: none -------------------------------------------------------------- Model checking property "1": Pmin=? [(F (x = 2)) || (F (x = 1))] ... Result (for initial states): 0 Time for model checking: 0.000s.
The problem seems to be an incorrect reduction from minimizing to maximizing queries.
When computing
Pmin=? [F x=2 || x=1]
for the following PRISM Program, with Storm we get0
, although0.3
should be correct.The problem seems to be an incorrect reduction from minimizing to maximizing queries.