Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:15:51 2013

Optimize a model with 680 rows, 4440 columns and 9620 nonzeros
Presolve removed 80 rows and 60 columns
Presolve time: 0.02s
Presolved: 600 rows, 4380 columns, 9300 nonzeros
Variable types: 4200 continuous, 180 integer (180 binary)

Root relaxation: objective 4.642213e+04, 649 iterations, 0.01 seconds

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

     0     0 46422.1265    0    3          - 46422.1265     -      -    0s
     0     0 46456.1748    0    3          - 46456.1748     -      -    0s
     0     0 46465.9568    0    3          - 46465.9568     -      -    0s
     0     0 46474.2808    0    3          - 46474.2808     -      -    0s
H    0     0                    47019.374336 46474.2808  1.16%     -    0s
     0     2 46478.2037    0    3 47019.3743 46478.2037  1.15%     -    0s
H    7     6                    46854.707377 46538.9578  0.67%  21.3    0s
*    9     6               7    46832.293155 46538.9578  0.63%  23.7    0s
*   23     8               7    46797.700049 46561.8190  0.50%  20.0    0s
*   46     5               6    46756.955185 46668.3040  0.19%  19.6    0s
H   53     1                    46746.515954 46706.4881  0.09%  18.5    0s
H   55     1                    46742.720716 46723.3879  0.04%  18.1    0s

Cutting planes:
  Gomory: 6

Explored 57 nodes (1715 simplex iterations) in 0.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.674272071620e+04, best bound 4.673928032863e+04, gap 0.0074%