PRISM
=====
Version: 4.5.dev
Date: Sat Mar 14 12:16:13 UTC 2020
Hostname: e72bdd194fc5
Memory limits: cudd=4g, java(heap)=11g
Command line: prism -javamaxmem 11g -cuddmaxmem 4g -heuristic speed -e 1e-6 -maxiters 1000000 nand.prism nand.props --property reliable -const 'N=40,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=40,K=4
Warning: Switching to sparse engine and (backwards) Gauss Seidel (default for heuristic=speed).
Building model...
Model constants: N=40,K=4
Computing reachable states...
Reachability (BFS): 1442 iterations in 4.58 seconds (average 0.003177, setup 0.00)
Time for model construction: 4.758 seconds.
Type: DTMC
States: 3999522 (1 initial)
Transitions: 6288542
Transition matrix: 49073 nodes (493 terminal), 6288542 minterms, vars: 33r/33c
Prob0: 1442 iterations in 4.09 seconds (average 0.002835, setup 0.00)
Prob1: 1297 iterations in 3.72 seconds (average 0.002870, setup 0.00)
yes = 141, no = 375263, maybe = 3624118
Computing remaining probabilities...
Engine: Sparse
Building sparse matrix... [n=3999522, nnz=5699366, compact] [25.6 MB]
Creating vector for diagonals... [dist=1, compact] [7.6 MB]
Creating vector for RHS... [dist=2, compact] [7.6 MB]
Allocating iteration vector... [30.5 MB]
TOTAL: [71.3 MB]
Starting iterations...
Backwards Gauss-Seidel: 2 iterations in 2.41 seconds (average 0.053000, setup 2.31)
Value in the initial state: 0.6186822208151961
Time for model checking: 10.45 seconds.
Result: 0.6186822208151961 (value in the initial state)
Overall running time: 15.762 seconds.
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Note: There was 1 warning during computation.