Gurobi 5.0.1 (linux64) logging started Sun Dec  9 10:43:08 2012

Optimize a model with 3000 rows, 2970 columns and 11330 nonzeros
Presolve removed 144 rows and 24 columns
Presolve time: 0.02s
Presolved: 2856 rows, 2946 columns, 11053 nonzeros
Variable types: 2770 continuous, 176 integer (176 binary)

Root relaxation: objective 6.379273e+04, 324 iterations, 0.00 seconds

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

     0     0 63792.7324    0   26          - 63792.7324     -      -    0s
H    0     0                    67522.000000 63792.7324  5.52%     -    0s
H    0     0                    65734.000000 63792.7324  2.95%     -    0s
     0     0 64033.7092    0   41 65734.0000 64033.7092  2.59%     -    0s
     0     0 64084.8496    0   44 65734.0000 64084.8496  2.51%     -    0s
     0     0 64118.6372    0   54 65734.0000 64118.6372  2.46%     -    0s
     0     0 64132.5491    0   57 65734.0000 64132.5491  2.44%     -    0s
     0     0 64138.7809    0   63 65734.0000 64138.7809  2.43%     -    0s
     0     0 64139.8634    0   53 65734.0000 64139.8634  2.43%     -    0s
     0     0 64142.0097    0   58 65734.0000 64142.0097  2.42%     -    0s
     0     0 64142.5817    0   54 65734.0000 64142.5817  2.42%     -    0s
     0     0 64145.4680    0   64 65734.0000 64145.4680  2.42%     -    0s
     0     0 64152.4477    0   59 65734.0000 64152.4477  2.41%     -    0s
     0     0 64156.6505    0   61 65734.0000 64156.6505  2.40%     -    0s
     0     0 64157.1425    0   62 65734.0000 64157.1425  2.40%     -    0s
     0     0 64157.7850    0   58 65734.0000 64157.7850  2.40%     -    0s
     0     0 64157.8871    0   48 65734.0000 64157.8871  2.40%     -    0s
     0     0 64157.9413    0   68 65734.0000 64157.9413  2.40%     -    0s
     0     0 64157.9878    0   68 65734.0000 64157.9878  2.40%     -    0s
H    0     0                    65662.000000 64157.9878  2.29%     -    0s
     0     2 64164.6559    0   68 65662.0000 64164.6559  2.28%     -    0s
H   54    53                    65185.000000 64257.3431  1.42%   8.2    0s
*   68    58              59    65134.000000 64257.3431  1.35%   7.5    0s
*  126    86              50    64902.000000 64290.9244  0.94%   6.7    0s
*  824   391              58    64898.000000 64464.2463  0.67%   9.4    2s
  4021   993 64798.8748   33   29 64898.0000 64707.5278  0.29%   6.8    5s
* 4624   975              51    64883.000000 64727.0036  0.24%   6.6    5s

Cutting planes:
  Gomory: 4
  Cover: 1
  Clique: 1
  Flow cover: 28

Explored 7449 nodes (44618 simplex iterations) in 7.67 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.488300000000e+04, best bound 6.487661707487e+04, gap 0.0098%