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 135 columns
Presolve time: 0.05s
Presolved: 500 rows, 878 columns, 2633 nonzeros
Variable types: 497 continuous, 381 integer (381 binary)
Found heuristic solution: objective 3279.1929845

Root relaxation: objective 3.276963e+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 3276.96252    0    2 3279.19298 3276.96252  0.07%     -    0s
     0     0 3277.23412    0    2 3279.19298 3277.23412  0.06%     -    0s
     0     0 3277.50343    0    2 3279.19298 3277.50343  0.05%     -    0s
     0     0 3277.77047    0    2 3279.19298 3277.77047  0.04%     -    0s
     0     0 3278.03526    0    2 3279.19298 3278.03526  0.04%     -    0s
     0     0 3278.29782    0    2 3279.19298 3278.29782  0.03%     -    0s
     0     0 3278.55818    0    2 3279.19298 3278.55818  0.02%     -    0s
     0     0 3278.81635    0    2 3279.19298 3278.81635  0.01%     -    0s
     0     0 3279.07210    0    2 3279.19298 3279.07210  0.00%     -    0s

Explored 0 nodes (48 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.279192984451e+03, best bound 3.279072101307e+03, gap 0.0037%