CPX_CALLBACK_INFO_BEST_INTEGER 

objective value of the best integer solution 

CPX_CALLBACK_INFO_MY_THREAD_NUM 

identifying number of the thread where the call of the callback occurred 

CPX_CALLBACK_INFO_BEST_REMAINING 

objective value of the best remaining node 

CPX_CALLBACK_INFO_NODE_COUNT 

how many nodes have been processed 

CPX_CALLBACK_INFO_NODES_LEFT 

how many nodes remain to be processed 

CPX_CALLBACK_INFO_MIP_ITERATIONS 

how many MIP iterations have occurred 

CPX_CALLBACK_INFO_CUTOFF 

cutoff information 

CPX_CALLBACK_INFO_MIP_FEAS 

feasibility information 

CPX_CALLBACK_INFO_PROBE_PHASE 

which phase of probing (0-3) 

CPX_CALLBACK_INFO_PROBE_PROGRESS 

progress in probing expressed as a fraction 

CPX_CALLBACK_INFO_FRACCUT_PROGRESS 

progress in fractional cuts expressed as a fraction 

CPX_CALLBACK_INFO_DISJCUT_PROGRESS 

progress in disjunctive cuts expressed as a fraction 

CPX_CALLBACK_INFO_FLOWMIR_PROGRESS 

progress in MIR cuts expressed as a fraction