PRISM
=====
Version: 4.5.dev
Date: Sat Apr 03 01:00:47 CEST 2021
Hostname: christopher
Memory limits: cudd=4g, java(heap)=11g
Command line: prism -javamaxmem 11g -cuddmaxmem 4g -heuristic speed -e 1e-6 -maxiters 1000000 csma.3-2.prism csma.props --property all_before_min
Parsing model file "csma.3-2.prism"...
Type: MDP
Modules: bus station1 station2 station3
Variables: b y1 y2 s1 x1 bc1 cd1 s2 x2 bc2 cd2 s3 x3 bc3 cd3
Parsing properties file "csma.props"...
5 properties:
(1) "all_before_max": Pmax=? [ !"collision_max_backoff" U "all_delivered" ]
(2) "all_before_min": Pmin=? [ !"collision_max_backoff" U "all_delivered" ]
(3) "some_before": Pmin=? [ F min_backoff_after_success<K ]
(4) "time_max": R{"time"}max=? [ F "all_delivered" ]
(5) "time_min": R{"time"}min=? [ F "all_delivered" ]
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Model checking: "all_before_min": Pmin=? [ !"collision_max_backoff" U "all_delivered" ]
Warning: Switching to sparse engine and (backwards) Gauss Seidel (default for heuristic=speed).
Building model...
Computing reachable states...
Reachability (BFS): 135 iterations in 0.17 seconds (average 0.001259, setup 0.00)
Time for model construction: 0.211 seconds.
Type: MDP
States: 36850 (1 initial)
Transitions: 55862
Choices: 38456
Transition matrix: 12759 nodes (4 terminal), 55862 minterms, vars: 42r/42c/13nd
Prob0E: 139 iterations in 0.26 seconds (average 0.001863, setup 0.00)
Prob1A: 47 iterations in 0.11 seconds (average 0.002340, setup 0.00)
yes = 13885, no = 1298, maybe = 21667
Computing remaining probabilities...
Engine: Sparse
Building sparse matrix... [n=36850, nc=23027, nnz=36932, k=3] [491.3 KB]
Creating vector for yes... [287.9 KB]
Allocating iteration vectors... [2 x 287.9 KB]
TOTAL: [1.3 MB]
Starting iterations...
Iterative method: 97 iterations in 0.04 seconds (average 0.000216, setup 0.02)
Value in the initial state: 0.4349662700161495
Time for model checking: 0.426 seconds.
Result: 0.4349662700161495 (value in the initial state)
Overall running time: 0.889 seconds.
---------------------------------------------------------------------
Note: There was 1 warning during computation.