Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:37:05 2013

Optimize a model with 671 rows, 37271 columns and 74481 nonzeros
Presolve time: 0.05s
Presolved: 671 rows, 37271 columns, 74481 nonzeros
Variable types: 37210 continuous, 61 integer (61 binary)

Root relaxation: objective 7.034776e+04, 1667 iterations, 0.04 seconds

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

     0     0 70347.7562    0    8          - 70347.7562     -      -    0s
H    0     0                    72781.000000 70347.7562  3.34%     -    0s
H    0     0                    71960.000000 70347.7562  2.24%     -    0s
     0     0 70482.5206    0    5 71960.0000 70482.5206  2.05%     -    0s
     0     0 70499.7586    0    7 71960.0000 70499.7586  2.03%     -    0s
     0     0 70518.2071    0    6 71960.0000 70518.2071  2.00%     -    0s
     0     0 70520.4124    0    6 71960.0000 70520.4124  2.00%     -    0s
     0     0 70520.4970    0    5 71960.0000 70520.4970  2.00%     -    0s
     0     2 70547.9376    0    5 71960.0000 70547.9376  1.96%     -    0s
H    4     4                    71843.312309 70606.9316  1.72%  49.5    0s
H    5     5                    70951.391933 70610.3178  0.48%  48.2    0s
H    9     7                    70846.953757 70610.3178  0.33%  34.7    0s
*   10     6               8    70796.000000 70610.3178  0.26%  34.4    0s
H   34     2                    70787.000000 70698.2621  0.13%  47.1    1s
H   35     3                    70759.777778 70698.2621  0.09%  46.1    1s
H   36     4                    70753.927928 70698.2621  0.08%  45.1    1s
*   38     3               9    70746.000000 70698.2621  0.07%  43.3    1s

Cutting planes:
  Implied bound: 157
  Flow cover: 7

Explored 46 nodes (3774 simplex iterations) in 1.27 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.074600000000e+04, best bound 7.073936435644e+04, gap 0.0094%