Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:15 2013

Optimize a model with 516 rows, 1013 columns and 3525 nonzeros
Presolve removed 16 rows and 133 columns
Presolve time: 0.10s
Presolved: 500 rows, 880 columns, 2639 nonzeros
Variable types: 497 continuous, 383 integer (383 binary)
Found heuristic solution: objective 3887.5966059

Root relaxation: objective 3.885400e+03, 6 iterations, 0.00 seconds

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

     0     0 3885.39996    0    2 3887.59661 3885.39996  0.06%     -    0s
     0     0 3885.67621    0    2 3887.59661 3885.67621  0.05%     -    0s
     0     0 3885.95013    0    2 3887.59661 3885.95013  0.04%     -    0s
     0     0 3886.22172    0    2 3887.59661 3886.22172  0.04%     -    0s
     0     0 3886.49103    0    2 3887.59661 3886.49103  0.03%     -    0s
     0     0 3886.75806    0    2 3887.59661 3886.75806  0.02%     -    0s
     0     0 3887.02284    0    2 3887.59661 3887.02284  0.01%     -    0s
     0     0 3887.28538    0    2 3887.59661 3887.28538  0.01%     -    0s

Explored 0 nodes (40 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.887596605944e+03, best bound 3.887285381170e+03, gap 0.0080%