PRISM
=====
Version: 4.5.dev
Date: Fri Feb 26 15:07:38 CET 2021
Hostname: christopher
Memory limits: cudd=4g, java(heap)=11g
Command line: prism -javamaxmem 11g -cuddmaxmem 4g -heuristic speed -e 1e-6 -maxiters 1000000 consensus.4.prism consensus.props --property steps_min -const K=4
Parsing model file "consensus.4.prism"...
Type: MDP
Modules: process1 process2 process3 process4
Variables: counter pc1 coin1 pc2 coin2 pc3 coin3 pc4 coin4
Parsing properties file "consensus.props"...
5 properties:
(1) "c1": P>=1 [ F "finished" ]
(2) "c2": Pmin=? [ F "finished"&"all_coins_equal_1" ]
(3) "disagree": Pmax=? [ F "finished"&!"agree" ]
(4) "steps_max": R{"steps"}max=? [ F "finished" ]
(5) "steps_min": R{"steps"}min=? [ F "finished" ]
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Model checking: "steps_min": R{"steps"}min=? [ F "finished" ]
Model constants: K=4
Warning: Switching to sparse engine and (backwards) Gauss Seidel (default for heuristic=speed).
Building model...
Model constants: K=4
Computing reachable states...
Reachability (BFS): 195 iterations in 0.02 seconds (average 0.000113, setup 0.00)
Time for model construction: 0.045 seconds.
Type: MDP
States: 43136 (1 initial)
Transitions: 144352
Choices: 115840
Transition matrix: 2336 nodes (3 terminal), 144352 minterms, vars: 18r/18c/4nd
Prob0A: 57 iterations in 0.04 seconds (average 0.000702, setup 0.00)
Prob1E: 58 iterations in 0.02 seconds (average 0.000379, setup 0.00)
Warning: PRISM hasn't checked for zero-reward loops.
Your minimum rewards may be too low...
goal = 64, inf = 0, maybe = 43072
Computing remaining rewards...
Engine: Sparse
Building sparse matrix (transitions)... [n=43136, nc=115776, nnz=144288, k=4] [2.3 MB]
Building sparse matrix (transition rewards)... [n=43136, nc=115776, nnz=0, k=4] [620.8 KB]
Creating vector for state rewards... [337.0 KB]
Creating vector for inf... [337.0 KB]
Allocating iteration vectors... [2 x 337.0 KB]
TOTAL: [4.2 MB]
Starting iterations...
Iterative method: 4613 iterations in 3.33 seconds (average 0.000717, setup 0.03)
Value in the initial state: 767.5261352324376
Time for model checking: 3.405 seconds.
Result: 767.5261352324376 (value in the initial state)
Overall running time: 3.68 seconds.
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Note: There were 2 warnings during computation.