Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:56:42 2013

Optimize a model with 29316 rows, 3136 columns and 89376 nonzeros
Presolve removed 5108 rows and 1644 columns
Presolve time: 0.21s
Presolved: 24208 rows, 1492 columns, 73785 nonzeros
Variable types: 22 continuous, 1470 integer (1470 binary)
Found heuristic solution: objective 66451.000000

Root relaxation: objective 5.004250e+04, 6050 iterations, 0.35 seconds

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

     0     0 50042.5000    0   12 66451.0000 50042.5000  24.7%     -    0s
H    0     0                    50055.000000 50042.5000  0.02%     -    0s
     0     0 50044.1115    0   22 50055.0000 50044.1115  0.02%     -    0s
     0     0 50044.1115    0    9 50055.0000 50044.1115  0.02%     -    0s
H    0     0                    50053.000000 50044.1115  0.02%     -    0s
     0     0 50045.6896    0   14 50053.0000 50045.6896  0.01%     -    0s
H    0     0                    50049.000000 50045.6896  0.01%     -    0s

Cutting planes:
  Gomory: 2
  MIR: 6

Explored 0 nodes (7556 simplex iterations) in 0.90 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.004900000000e+04, best bound 5.004600000000e+04, gap 0.0060%