Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:45 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 3.859624e+04, 2681 iterations, 0.74 seconds

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

     0     0 38596.2383    0   36          - 38596.2383     -      -    0s
H    0     0                    46167.000000 38596.2383  16.4%     -    1s
     0     0 43437.1437    0    7 46167.0000 43437.1437  5.91%     -    1s
H    0     0                    45032.407194 43437.1437  3.54%     -    1s
H    0     0                    44211.000000 43437.1437  1.75%     -    1s
H    0     0                    43443.000000 43437.1437  0.01%     -    1s
     0     0 43438.4538    0    3 43443.0000 43438.4538  0.01%     -    1s
     0     0     cutoff    0      43443.0000 43443.0000   0.0%     -    1s

Cutting planes:
  Gomory: 1
  Implied bound: 35

Explored 0 nodes (3858 simplex iterations) in 1.97 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.344300000000e+04, best bound 4.344300000000e+04, gap 0.0%