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 131 columns
Presolve time: 0.05s
Presolved: 500 rows, 882 columns, 2645 nonzeros
Variable types: 497 continuous, 385 integer (385 binary)
Found heuristic solution: objective 3439.5351809

Root relaxation: objective 3.437429e+03, 6 iterations, 0.01 seconds

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

     0     0 3437.42922    0    2 3439.53518 3437.42922  0.06%     -    0s
     0     0 3437.72345    0    2 3439.53518 3437.72345  0.05%     -    0s
     0     0 3438.01518    0    2 3439.53518 3438.01518  0.04%     -    0s
     0     0 3438.30443    0    2 3439.53518 3438.30443  0.04%     -    0s
     0     0 3438.59123    0    2 3439.53518 3438.59123  0.03%     -    0s
     0     0 3438.87561    0    2 3439.53518 3438.87561  0.02%     -    0s
     0     0 3439.15758    0    2 3439.53518 3439.15758  0.01%     -    0s
     0     0 3439.43697    0    2 3439.53518 3439.43697  0.00%     -    0s

Explored 0 nodes (48 simplex iterations) in 0.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.439535180882e+03, best bound 3.439436965707e+03, gap 0.0029%