Gurobi 5.0.1 (linux64) logging started Sun Dec  9 06:11:21 2012

Optimize a model with 570 rows, 540 columns and 1781 nonzeros
Presolve removed 35 rows and 19 columns
Presolve time: 0.01s
Presolved: 535 rows, 521 columns, 1705 nonzeros
Variable types: 344 continuous, 177 integer (177 binary)

Root relaxation: objective 4.444670e+04, 249 iterations, 0.00 seconds

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

     0     0 44446.7030    0   78          - 44446.7030     -      -    0s
H    0     0                    69320.000000 44446.7030  35.9%     -    0s
H    0     0                    69032.000000 44446.7030  35.6%     -    0s
     0     0 52479.0427    0   23 69032.0000 52479.0427  24.0%     -    0s
     0     0 52975.5821    0   10 69032.0000 52975.5821  23.3%     -    0s
     0     0 53043.5521    0   10 69032.0000 53043.5521  23.2%     -    0s
     0     0 53045.6617    0   13 69032.0000 53045.6617  23.2%     -    0s
     0     0 53046.7373    0    8 69032.0000 53046.7373  23.2%     -    0s
H    0     0                    54366.000000 53046.7373  2.43%     -    0s
     0     2 53054.8196    0    8 54366.0000 53054.8196  2.41%     -    0s
*   27    24              27    53312.000000 53054.8196  0.48%   2.2    0s
*   48    29              19    53274.000000 53086.8918  0.35%   2.4    0s
*  185    66              16    53273.000000 53143.9851  0.24%   2.5    2s
   340    59     cutoff   14      53273.0000 53194.8459  0.15%   2.5    5s

Cutting planes:
  Gomory: 11
  Cover: 2
  Flow cover: 59
  Flow path: 39

Explored 416 nodes (1454 simplex iterations) in 5.96 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.327300000000e+04, best bound 5.326850406523e+04, gap 0.0084%