Version: 1.15 
 verifypn-linux64 data/zoo_json_cond_enf2/UsSignal_4.json -T -R -O -V Low
DFA generation time: 0.041 seconds 
DFA states: 19 
DFA transitions: 853
Problem file: data/zoo_json_cond_enf2/UsSignal_4.json
Switches to update: 184

Decomposed topology into 1 subproblems
Topological decomposition took 0.0 seconds
Subproblem 0 unsolvable!
Subproblem verification time: 1.282 seconds
Problem is unsolvable!
Total program runtime: 2.34 seconds

real 2.67
user 5.14
sys 0.33
