Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:14 2013

Optimize a model with 516 rows, 1013 columns and 3525 nonzeros
Presolve removed 16 rows and 144 columns
Presolve time: 0.11s
Presolved: 500 rows, 869 columns, 2606 nonzeros
Variable types: 497 continuous, 372 integer (372 binary)
Found heuristic solution: objective 3432.7437730

Root relaxation: objective 3.430319e+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 3430.31917    0    2 3432.74377 3430.31917  0.07%     -    0s
     0     0 3430.54191    0    2 3432.74377 3430.54191  0.06%     -    0s
     0     0 3430.76279    0    2 3432.74377 3430.76279  0.06%     -    0s
     0     0 3430.98183    0    2 3432.74377 3430.98183  0.05%     -    0s
     0     0 3431.19905    0    2 3432.74377 3431.19905  0.04%     -    0s
     0     0 3431.41446    0    2 3432.74377 3431.41446  0.04%     -    0s
     0     0 3431.62808    0    2 3432.74377 3431.62808  0.03%     -    0s
     0     0 3431.83992    0    2 3432.74377 3431.83992  0.03%     -    0s
     0     0 3432.05000    0    2 3432.74377 3432.05000  0.02%     -    0s
     0     0 3432.25832    0    2 3432.74377 3432.25832  0.01%     -    0s
     0     0 3432.46491    0    2 3432.74377 3432.46491  0.01%     -    0s

Explored 0 nodes (54 simplex iterations) in 0.27 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.432743772967e+03, best bound 3.432464912149e+03, gap 0.0081%