PRISM
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Version: 4.5.dev
Date: Sat Mar 14 12:20:31 UTC 2020
Hostname: e72bdd194fc5
Memory limits: cudd=4g, java(heap)=11g
Command line: prism -javamaxmem 11g -cuddmaxmem 4g -ii -e 5e-2 -heuristic speed -ddextraactionvars 100 -maxiters 1000000 nand.prism nand.props --property reliable -const 'N=60,K=4'
Parsing model file "nand.prism"...
Type: DTMC
Modules: multiplex
Variables: u c s z zx zy x y
Parsing properties file "nand.props"...
1 property:
(1) "reliable": P=? [ F s=4&z/N<0.1 ]
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Model checking: "reliable": P=? [ F s=4&z/N<0.1 ]
Model constants: N=60,K=4
Warning: Switching to sparse engine and (backwards) Gauss Seidel (default for heuristic=speed).
Building model...
Model constants: N=60,K=4
Computing reachable states...
Reachability (BFS): 2162 iterations in 12.86 seconds (average 0.005950, setup 0.00)
Time for model construction: 13.351 seconds.
Type: DTMC
States: 18826082 (1 initial)
Transitions: 29772212
Transition matrix: 97452 nodes (1103 terminal), 29772212 minterms, vars: 33r/33c
Prob0: 2162 iterations in 12.53 seconds (average 0.005797, setup 0.00)
Prob1: 1945 iterations in 10.80 seconds (average 0.005551, setup 0.00)
yes = 547, no = 1757695, maybe = 17067840
Computing remaining probabilities...
Engine: Sparse
Building sparse matrix... [n=18826082, nnz=26994875] [326.9 MB]
Creating vector for diagonals... [dist=1, compact] [35.9 MB]
Creating vector for RHS... [dist=2, compact] [35.9 MB]
Allocating iteration vectors... [ 2 x 143.6 MB]
TOTAL: [686.0 MB]
Starting iterations...
Max relative diff between upper and lower bound on convergence: 0
Backwards Gauss-Seidel (interval iteration): 1 iterations in 9.55 seconds (average 0.346000, setup 9.21)
Value in the initial state: 0.6867214589192238
Time for model checking: 33.882 seconds.
Result: 0.6867214589192238 (value in the initial state)
Overall running time: 47.812 seconds.
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Note: There was 1 warning during computation.