Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:50:19 2013

Optimize a model with 891 rows, 65691 columns and 131301 nonzeros
Presolve time: 0.10s
Presolved: 891 rows, 65691 columns, 131301 nonzeros
Variable types: 65610 continuous, 81 integer (81 binary)

Root relaxation: objective 7.447619e+04, 2185 iterations, 0.08 seconds

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

     0     0 74476.1885    0    5          - 74476.1885     -      -    0s
H    0     0                    76428.000000 74476.1885  2.55%     -    0s
H    0     0                    74974.000000 74476.1885  0.66%     -    0s
     0     0 74637.0833    0    1 74974.0000 74637.0833  0.45%     -    0s
     0     0 74637.0833    0    5 74974.0000 74637.0833  0.45%     -    0s
     0     0 74637.0833    0    1 74974.0000 74637.0833  0.45%     -    0s
     0     0 74637.2209    0    2 74974.0000 74637.2209  0.45%     -    1s
     0     0 74637.7689    0    3 74974.0000 74637.7689  0.45%     -    1s
     0     0 74638.1136    0    2 74974.0000 74638.1136  0.45%     -    1s
     0     2 74663.3750    0    2 74974.0000 74663.3750  0.41%     -    1s
*    4     1               4    74800.000000 74800.0000   0.0%  61.5    1s

Cutting planes:
  Implied bound: 39
  Flow cover: 2

Explored 5 nodes (4382 simplex iterations) in 1.56 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.480000000000e+04, best bound 7.480000000000e+04, gap 0.0%