Gurobi 5.6.3 (linux64) logging started Tue Oct  7 23:49:39 2014

Optimize a model with 22351 rows, 22350 columns and 66752 nonzeros
Presolve time: 0.48s
Presolved: 22351 rows, 22350 columns, 66752 nonzeros
Variable types: 0 continuous, 22350 integer (22350 binary)
Found heuristic solution: objective 18.7441242

Root relaxation: objective 1.296320e+01, 2417 iterations, 0.22 seconds

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

     0     0   12.96320    0  174   18.74412   12.96320  30.8%     -    0s
H    0     0                      12.9807427   12.96320  0.14%     -    0s
H    0     0                      12.9642537   12.96320  0.01%     -    0s

Explored 0 nodes (2417 simplex iterations) in 0.87 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.296425370293e+01, best bound 1.296320019872e+01, gap 0.0081%