Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:17 2013

Optimize a model with 516 rows, 1013 columns and 3525 nonzeros
Presolve removed 16 rows and 140 columns
Presolve time: 0.10s
Presolved: 500 rows, 873 columns, 2618 nonzeros
Variable types: 497 continuous, 376 integer (376 binary)
Found heuristic solution: objective 3502.0000000

Root relaxation: objective 3.499671e+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 3499.67068    0    2 3502.00000 3499.67068  0.07%     -    0s
     0     0 3499.91252    0    2 3502.00000 3499.91252  0.06%     -    0s
     0     0 3500.15233    0    2 3502.00000 3500.15233  0.05%     -    0s
     0     0 3500.39013    0    2 3502.00000 3500.39013  0.05%     -    0s
     0     0 3500.62594    0    2 3502.00000 3500.62594  0.04%     -    0s
     0     0 3500.85978    0    2 3502.00000 3500.85978  0.03%     -    0s
     0     0 3501.09167    0    2 3502.00000 3501.09167  0.03%     -    0s
     0     0 3501.32162    0    2 3502.00000 3501.32162  0.02%     -    0s
     0     0 3501.54965    0    2 3502.00000 3501.54965  0.01%     -    0s
     0     0 3501.77577    0    2 3502.00000 3501.77577  0.01%     -    0s

Explored 0 nodes (51 simplex iterations) in 0.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.502000000000e+03, best bound 3.501775768296e+03, gap 0.0064%