Originally posted by: EvaMA
Hi all,
I am using the CPLEX 12.5 Java API .
When solving my MIP I'd like to find out how many nodes the solver produced when searching through the Branch-And-Cut-Tree. What I'm searching for is an output like this (from the CPLEX manual):
Solution pool: 5 solutions saved.
MIP-Integer optimal solution: Objective = 3.1860000000e+03
Solution time = 0.01 sec. Iterations = 131 Nodes = 44
For my output I defined the following parameters:
cplex.setParam(IntParam.MIPInterval, 10);
cplex.setParam(IntParam.MIPDisplay, 2);
Following information is displayed:
Tried aggregator 2 times.
MIP Presolve eliminated 259162 rows and 332570 columns.
Aggregator did 1320 substitutions.
Reduced MIP has 115766 rows, 187359 columns, and 546843 nonzeros.
Reduced MIP has 310 binaries, 0 generals, 0 SOSs, and 0 indicators.
Presolve time = 2.43 sec. (813.21 ticks)
Probing changed sense of 10 constraints.
Probing time = 0.02 sec. (3.96 ticks)
Tried aggregator 2 times.
MIP Presolve eliminated 90 rows and 20 columns.
MIP Presolve modified 280 coefficients.
Aggregator did 30 substitutions.
Reduced MIP has 115646 rows, 187309 columns, and 546193 nonzeros.
Reduced MIP has 310 binaries, 0 generals, 0 SOSs, and 0 indicators.
Presolve time = 0.75 sec. (234.35 ticks)
Probing time = 0.03 sec. (3.91 ticks)
Clique table members: 70.
MIP emphasis: balance optimality and feasibility.
MIP search method: dynamic search.
Parallel mode: deterministic, using up to 4 threads.
Root relaxation solution time = 5.63 sec. (1523.06 ticks)
Nodes Cuts/
Node Left Objective IInf Best Integer Best Bound ItCnt Gap
0 0 156633.5972 10 156633.5972 30774
* 0+ 0 156633.5972 156633.5972 30774 0.00%
0 0 cutoff 156633.5972 156633.5972 30774 0.00%
Elapsed time = 11.37 sec. (3007.60 ticks, tree = 0.00 MB, solutions = 1)
Root node processing (before b&c):
Real time = 7.50 sec. (1825.32 ticks)
Parallel b&c, 4 threads:
Real time = 0.00 sec. (0.00 ticks)
Sync time (average) = 0.00 sec.
Wait time (average) = 0.00 sec.
------------
Total (root+branch&cut) = 7.50 sec. (1825.32 ticks)
Unfortunately the number of nodes is not included in the output. What can I do? Any ideas?
Thank you,
Eva
#CPLEXOptimizers#DecisionOptimization