Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:47:44 2013

Optimize a model with 1771 rows, 45664 columns and 2717337 nonzeros
Presolve removed 78 rows and 768 columns (presolve time = 5s) ...
Presolve removed 84 rows and 918 columns
Presolve time: 9.58s
Presolved: 1687 rows, 44746 columns, 2657531 nonzeros
Variable types: 0 continuous, 44746 integer (44746 binary)
Found heuristic solution: objective 24155.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8501    1.8689994e+04   2.864917e+02   0.000000e+00      5s
   12533    1.8797341e+04   2.487500e+03   0.000000e+00     10s
   13696    1.8810000e+04   0.000000e+00   0.000000e+00     12s

Root relaxation: objective 1.881000e+04, 13696 iterations, 12.02 seconds

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

*    0     0               0    18810.000000 18810.0000   0.0%     -   22s

Explored 0 nodes (13696 simplex iterations) in 22.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.881000000000e+04, best bound 1.881000000000e+04, gap 0.0%