Gurobi 5.6.3 (linux64) logging started Tue Oct  7 23:43:23 2014

Optimize a model with 21463 rows, 21462 columns and 64094 nonzeros
Presolve time: 0.46s
Presolved: 21463 rows, 21462 columns, 64094 nonzeros
Variable types: 0 continuous, 21462 integer (21462 binary)
Found heuristic solution: objective 23.4330950

Root relaxation: objective 1.229855e+01, 1613 iterations, 0.13 seconds

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

*    0     0               0      12.2985461   12.29855  0.00%     -    0s

Explored 0 nodes (1613 simplex iterations) in 0.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.229854611197e+01, best bound 1.229854611197e+01, gap 0.0%