Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:18 2013

Optimize a model with 23478 rows, 2704 columns and 71656 nonzeros
Presolve removed 2105 rows and 1361 columns
Presolve time: 0.17s
Presolved: 21373 rows, 1343 columns, 65732 nonzeros
Variable types: 33 continuous, 1310 integer (1310 binary)
Found heuristic solution: objective 58842.000000

Root relaxation: objective 4.248444e+04, 9789 iterations, 0.54 seconds

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

     0     0 42484.4395    0    9 58842.0000 42484.4395  27.8%     -    0s
H    0     0                    42498.000000 42484.4395  0.03%     -    0s
H    0     0                    42495.000000 42484.4395  0.02%     -    0s
H    0     0                    42488.000000 42484.4395  0.01%     -    0s

Explored 0 nodes (9801 simplex iterations) in 0.80 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.248800000000e+04, best bound 4.248500000000e+04, gap 0.0071%