Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:24:10 2013

Optimize a model with 6017 rows, 1089 columns and 18513 nonzeros
Presolve removed 1529 rows and 586 columns
Presolve time: 0.04s
Presolved: 4488 rows, 503 columns, 13764 nonzeros
Variable types: 10 continuous, 493 integer (493 binary)
Found heuristic solution: objective 20268.000000

Root relaxation: objective 1.534445e+04, 1220 iterations, 0.03 seconds

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

     0     0 15344.4505    0    7 20268.0000 15344.4505  24.3%     -    0s
H    0     0                    15350.000000 15344.4505  0.04%     -    0s
     0     0 15347.2560    0   14 15350.0000 15347.2560  0.02%     -    0s
     0     0 15347.2560    0    7 15350.0000 15347.2560  0.02%     -    0s
     0     0 15347.3120    0   16 15350.0000 15347.3120  0.02%     -    0s
     0     0 15348.0000    0   12 15350.0000 15348.0000  0.01%     -    0s
     0     1 15348.0000    0    8 15350.0000 15348.0000  0.01%     -    0s

Explored 3 nodes (1361 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.535000000000e+04, best bound 1.535000000000e+04, gap 0.0%