Gurobi 5.6.3 (linux64) logging started Tue Oct  7 23:21:56 2014

Optimize a model with 19461 rows, 19460 columns and 58102 nonzeros
Presolve time: 0.40s
Presolved: 19461 rows, 19460 columns, 58102 nonzeros
Variable types: 0 continuous, 19460 integer (19460 binary)
Found heuristic solution: objective 19.7669195

Root relaxation: objective 1.256349e+01, 1681 iterations, 0.13 seconds

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

*    0     0               0      12.5634893   12.56349  0.00%     -    0s

Explored 0 nodes (1681 simplex iterations) in 0.58 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.256348934730e+01, best bound 1.256348934730e+01, gap 0.0%