Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:36 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 4.339527e+04, 2765 iterations, 0.58 seconds

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

     0     0 43395.2730    0   35          - 43395.2730     -      -    0s
H    0     0                    54109.000000 43395.2730  19.8%     -    0s
     0     0 49638.0381    0    6 54109.0000 49638.0381  8.26%     -    1s
H    0     0                    53025.405334 49638.0381  6.39%     -    1s
H    0     0                    50983.000000 49638.0381  2.64%     -    1s
     0     0 49668.5148    0    3 50983.0000 49668.5148  2.58%     -    1s
     0     0 49679.3332    0    3 50983.0000 49679.3332  2.56%     -    2s
H    0     0                    50563.000000 49679.3332  1.75%     -    2s
H    0     0                    50392.000000 49679.3332  1.41%     -    2s
     0     0 49682.0281    0    2 50392.0000 49682.0281  1.41%     -    2s
H    0     0                    50101.000000 49682.0281  0.84%     -    2s
     0     2 49696.5141    0    2 50101.0000 49696.5141  0.81%     -    2s
H    3     3                    49890.000000 49810.0811  0.16%  88.3    2s
H    4     2                    49863.000000 49810.0811  0.11%  69.2    2s
*    6     3               6    49854.000000 49810.0811  0.09%  50.0    2s

Cutting planes:
  Gomory: 1
  Implied bound: 37

Explored 9 nodes (4614 simplex iterations) in 2.69 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.985400000000e+04, best bound 4.985400000000e+04, gap 0.0%