Gurobi 5.6.3 (linux64) logging started Tue Oct  7 23:28:47 2014

Optimize a model with 20023 rows, 20022 columns and 59784 nonzeros
Presolve time: 0.41s
Presolved: 20023 rows, 20022 columns, 59784 nonzeros
Variable types: 0 continuous, 20022 integer (20022 binary)
Found heuristic solution: objective 17.7555374

Root relaxation: objective 1.180040e+01, 1830 iterations, 0.14 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   11.80040    0  130   17.75554   11.80040  33.5%     -    0s
H    0     0                      11.8062804   11.80040  0.05%     -    0s
H    0     0                      11.8050687   11.80040  0.04%     -    0s
H    0     0                      11.8024119   11.80040  0.02%     -    0s
     0     0     cutoff    0        11.80241   11.80241  0.00%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 1

Explored 0 nodes (1833 simplex iterations) in 0.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.180241188544e+01, best bound 1.180241188544e+01, gap 0.0%