Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:39 2013

Optimize a model with 19006 rows, 18576 columns and 74046 nonzeros
Presolve removed 43 rows and 0 columns
Presolve time: 0.08s
Presolved: 18963 rows, 18576 columns, 74003 nonzeros
Variable types: 18533 continuous, 43 integer (43 binary)

Root relaxation: objective 3.808560e+04, 2845 iterations, 0.84 seconds

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

     0     0 38085.5995    0   34          - 38085.5995     -      -    1s
H    0     0                    46400.000000 38085.5995  17.9%     -    1s
     0     0 42719.5558    0    5 46400.0000 42719.5558  7.93%     -    2s
H    0     0                    44733.521634 42719.5558  4.50%     -    2s
H    0     0                    43331.000000 42719.5558  1.41%     -    2s
H    0     0                    42817.000000 42719.5558  0.23%     -    2s
     0     0 42810.9000    0    2 42817.0000 42810.9000  0.01%     -    2s
     0     0     cutoff    0      42817.0000 42817.0000   0.0%     -    2s

Cutting planes:
  Implied bound: 38

Explored 0 nodes (4004 simplex iterations) in 2.27 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.281700000000e+04, best bound 4.281700000000e+04, gap 0.0%