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

Optimize a model with 516 rows, 1013 columns and 3525 nonzeros
Presolve removed 16 rows and 136 columns
Presolve time: 0.10s
Presolved: 500 rows, 877 columns, 2630 nonzeros
Variable types: 497 continuous, 380 integer (380 binary)
Found heuristic solution: objective 2689.1101631

Root relaxation: objective 2.686796e+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 2686.79611    0    2 2689.11016 2686.79611  0.09%     -    0s
     0     0 2687.05023    0    2 2689.11016 2687.05023  0.08%     -    0s
     0     0 2687.30222    0    2 2689.11016 2687.30222  0.07%     -    0s
     0     0 2687.55209    0    2 2689.11016 2687.55209  0.06%     -    0s
     0     0 2687.79985    0    2 2689.11016 2687.79985  0.05%     -    0s
     0     0 2688.04553    0    2 2689.11016 2688.04553  0.04%     -    0s
     0     0 2688.28915    0    2 2689.11016 2688.28915  0.03%     -    0s
     0     0 2688.53072    0    2 2689.11016 2688.53072  0.02%     -    0s
     0     0 2688.77026    0    2 2689.11016 2688.77026  0.01%     -    0s
     0     0 2689.00759    0    2 2689.11016 2689.00759  0.00%     -    0s

Explored 0 nodes (57 simplex iterations) in 0.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.689110163075e+03, best bound 2.689007587914e+03, gap 0.0038%