Gurobi 5.0.1 (linux64) logging started Sat Dec  8 02:35:12 2012

Optimize a model with 285 rows, 270 columns and 881 nonzeros
Presolve removed 35 rows and 19 columns
Presolve time: 0.00s
Presolved: 250 rows, 251 columns, 805 nonzeros
Variable types: 164 continuous, 87 integer (87 binary)

Root relaxation: objective 2.280799e+04, 117 iterations, 0.00 seconds

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

     0     0 22807.9888    0   41          - 22807.9888     -      -    0s
H    0     0                    35472.000000 22807.9888  35.7%     -    0s
     0     0 28200.9823    0   16 35472.0000 28200.9823  20.5%     -    0s
     0     0 28521.1589    0    6 35472.0000 28521.1589  19.6%     -    0s
     0     0 28583.8221    0    7 35472.0000 28583.8221  19.4%     -    0s
     0     0 28585.8227    0    6 35472.0000 28585.8227  19.4%     -    0s
H    0     0                    30516.000000 28585.8227  6.33%     -    0s
     0     2 28592.2282    0    6 30516.0000 28592.2282  6.30%     -    0s
H   24    22                    29495.000000 28592.2282  3.06%   2.9    0s
H   27    20                    29075.000000 28592.2282  1.66%   2.9    0s
H   27    19                    29011.000000 28592.2282  1.44%   2.9    0s
*   43    18              10    28959.000000 28642.4976  1.09%   2.9    0s
*   53    17               8    28841.000000 28646.2837  0.68%   2.9    0s
*   67    18              14    28776.000000 28661.7770  0.40%   2.7    0s
H   70    13                    28762.000000 28670.1923  0.32%   2.7    0s
*   71     3               4    28698.000000 28674.0290  0.08%   2.7    0s

Cutting planes:
  Gomory: 4
  Cover: 2
  Flow cover: 26
  Flow path: 18

Explored 75 nodes (395 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.869800000000e+04, best bound 2.869800000000e+04, gap 0.0%