IloCplex :: Exception error in kDPFC example

[highhill2]

I compiled the program and tried the examples listed in README, and the kDPFC one ended up with an error as in the following. I wonder if you have any idea on this problem.

$ ./kDPFC ../data/CRC/CRC1.SPhyR.input -a 0.0152 -b 0.0789
Number of fixed characters = 0
Number of fixed taxa = 0
Base log likelihood = 0
Step 1 -- elapsed time 0.0318 s
Step 1 -- number of constraints: 150
Step 1 -- number of active variables: 231
Step 1 -- introduced 258 constraints
Step 2 -- elapsed time 0.0363889 s
Step 2 -- number of constraints: 408
Step 2 -- number of active variables: 420
Step 2 -- introduced 115 constraints
Step 3 -- elapsed time 0.04426 s
Step 3 -- number of constraints: 523
Step 3 -- number of active variables: 429
Step 3 -- introduced 21 constraints
Step 4 -- elapsed time 0.0506949 s
Step 4 -- number of constraints: 544
Step 4 -- number of active variables: 429
Step 4 -- introduced 34 constraints
Step 5 -- elapsed time 0.101743 s
Step 5 -- number of constraints: 578
Step 5 -- number of active variables: 429
terminate called after throwing an instance of 'IloCplex::Exception'
Stopped (core dumped)