Gurobi 5.0.1 (linux64) logging started Sun Dec  9 06:11:09 2012

Optimize a model with 570 rows, 540 columns and 1791 nonzeros
Presolve removed 18 rows and 11 columns
Presolve time: 0.01s
Presolved: 552 rows, 529 columns, 1747 nonzeros
Variable types: 353 continuous, 176 integer (176 binary)

Root relaxation: objective 5.115777e+04, 270 iterations, 0.00 seconds

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

     0     0 51157.7740    0   88          - 51157.7740     -      -    0s
H    0     0                    84331.000000 51157.7740  39.3%     -    0s
     0     0 61463.7477    0   35 84331.0000 61463.7477  27.1%     -    0s
H    0     0                    65422.000000 61463.7477  6.05%     -    0s
     0     0 61926.7827    0   18 65422.0000 61926.7827  5.34%     -    0s
     0     0 62005.0597    0   14 65422.0000 62005.0597  5.22%     -    0s
     0     0 62005.6384    0   13 65422.0000 62005.6384  5.22%     -    0s
     0     2 62008.4762    0   13 65422.0000 62008.4762  5.22%     -    0s
H   27    24                    62534.000000 62009.6838  0.84%   3.5    0s
*   93    46              31    62435.000000 62065.9411  0.59%   3.1    1s
*  176    79              27    62421.000000 62128.1717  0.47%   3.2    2s
   328   113 62239.1866    5   11 62421.0000 62194.3788  0.36%   3.4    5s
*  447   119              24    62411.000000 62217.6280  0.31%   3.4    6s
   652   143 62409.6976   22    6 62411.0000 62270.5493  0.23%   4.2   10s

Cutting planes:
  Learned: 1
  Gomory: 22
  Flow cover: 42
  Flow path: 21

Explored 807 nodes (3721 simplex iterations) in 12.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.241100000000e+04, best bound 6.240620370370e+04, gap 0.0077%