PRISM

./fix-syntax ./prism -javamaxmem 11g -cuddmaxmem 4g -ii -e 5e-2 -heuristic speed -ddextraactionvars 100 -maxiters 1000000 cluster.prism cluster.props --property premium_steady -const N=128,T=2000,t=20

PRISM
=====

Version: 4.5.dev
Date: Sat Mar 14 12:42:13 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 cluster.prism cluster.props --property premium_steady -const 'N=128,T=2000,t=20'

Parsing model file "cluster.prism"...

Type:        CTMC
Modules:     Left Right Repairman Line ToLeft ToRight 
Variables:   left_n left right_n right r line line_n toleft toleft_n toright toright_n 

Parsing properties file "cluster.props"...

8 properties:
(1) "below_min": R{"time_not_min"}=? [ C<=T ]
(2) "operational": R{"percent_op"}=? [ I=t ]
(3) "premium_steady": S=? [ "premium" ]
(4) "qos1": P=? [ F<=T !"minimum" ]
(5) "qos2": P=? [ F[t,t] !"minimum" ]
(6) "qos3": P=? [ "minimum" U<=t "premium" ]
(7) "qos4": P=? [ !"minimum" U>=t "minimum" ]
(8) "repairs": R{"num_repairs"}=? [ C<=T ]

---------------------------------------------------------------------

Model checking: "premium_steady": S=? [ "premium" ]
Model constants: N=128

Warning: Switching to sparse engine and (backwards) Gauss Seidel (default for heuristic=speed).

Building model...
Model constants: N=128

Computing reachable states...

Reachability (BFS): 261 iterations in 0.14 seconds (average 0.000556, setup 0.00)

Time for model construction: 0.239 seconds.

Type:        CTMC
States:      597012 (1 initial)
Transitions: 2908192

Rate matrix: 17481 nodes (134 terminal), 2908192 minterms, vars: 25r/25c

SCCs: 1, BSCCs: 1, non-BSCC states: 0
BSCC sizes: 1:597012

Computing steady state probabilities for BSCC 1

Computing probabilities...
Engine: Sparse

Building sparse matrix... [n=597012, nnz=2908192, compact] [11.7 MB]
Creating vector for diagonals... [dist=6345, compact] [1.2 MB]
Allocating iteration vector... [4.6 MB]
TOTAL: [17.4 MB]

Starting iterations...
Iteration 376: max relative diff=0.273061, 5.00 sec so far

Backwards Gauss-Seidel: 741 iterations in 12.45 seconds (average 0.013297, setup 2.60)

BSCC 1 probability: 0.9979382679364908

All states are in BSCCs (so no reachability probabilities computed)

Value in the initial state: 0.9979382679364908

Time for model checking: 12.912 seconds.

Result: 0.9979382679364908 (value in the initial state)


Overall running time: 13.722 seconds.

---------------------------------------------------------------------

Note: There was 1 warning during computation.