Gurobi 5.0.1 (linux64) logging started Sun Dec  9 06:11:51 2012

Optimize a model with 3000 rows, 2970 columns and 11334 nonzeros
Presolve removed 169 rows and 21 columns
Presolve time: 0.02s
Presolved: 2831 rows, 2949 columns, 10981 nonzeros
Variable types: 2774 continuous, 175 integer (175 binary)

Root relaxation: objective 5.842526e+04, 268 iterations, 0.00 seconds

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

     0     0 58425.2566    0    6          - 58425.2566     -      -    0s
H    0     0                    59307.000000 58425.2566  1.49%     -    0s
H    0     0                    58978.000000 58425.2566  0.94%     -    0s
     0     0 58554.8180    0   12 58978.0000 58554.8180  0.72%     -    0s
     0     0 58581.8723    0    9 58978.0000 58581.8723  0.67%     -    0s
     0     0 58582.8209    0   10 58978.0000 58582.8209  0.67%     -    0s
     0     0 58582.8209    0    6 58978.0000 58582.8209  0.67%     -    0s
     0     0 58582.8209    0   13 58978.0000 58582.8209  0.67%     -    0s
     0     0 58582.8666    0   10 58978.0000 58582.8666  0.67%     -    0s
     0     0 58597.0499    0   15 58978.0000 58597.0499  0.65%     -    0s
     0     0 58600.3037    0   11 58978.0000 58600.3037  0.64%     -    0s
     0     2 58653.7969    0   11 58978.0000 58653.7969  0.55%     -    0s
*    6     6               4    58754.000000 58696.6840  0.10%   3.5    0s
*   11     0               3    58713.000000 58713.0000   0.0%   3.3    0s

Cutting planes:
  Gomory: 2
  Cover: 1
  Flow cover: 5

Explored 12 nodes (568 simplex iterations) in 0.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.871300000000e+04, best bound 5.871300000000e+04, gap 0.0%