Exponentially increasing cpu time while using QBSolv/D-Wave

I solved a simple QUBO with QBSolv and D-Wave's quantum annealer and it worked. However, it is very confusing to me why the displayed "seconds of classic cpu time" are increasing exponentially. My log file looked basically like this:

101000.... -5760.... Energy of solution 0 Number of Partitioned calls, 1 output sample 0.00300 seconds of classic cpu time 148 bits, find Min, SubMatrix= 140, -a o, timeout=2592000.0 sec

110100.... -5760.... Energy of solution 21 Number of Partitioned calls, 2 output sample 1437.91600 seconds of classic cpu time

Some additional information: I am working with my local Python IDE (PyCharm) and I used the following settings: number of reads = 1000, number of repeats = 5, verbosity = 1, solver_limit = 140. Can anyone tell me, why the classic cpu time is getting longer and longer for every sample output? Is it maybe because of the verbosity setting or do I have to change the output settings?

Thank you in advance!