Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:40 2013

Optimize a model with 680 rows, 5240 columns and 11220 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.03s
Presolved: 640 rows, 5180 columns, 10360 nonzeros
Variable types: 4800 continuous, 380 integer (380 binary)

Root relaxation: objective 3.894400e+04, 524 iterations, 0.01 seconds

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

     0     0 38944.0027    0    2          - 38944.0027     -      -    0s
     0     0 38998.6041    0    3          - 38998.6041     -      -    0s
     0     0 38998.6041    0    3          - 38998.6041     -      -    0s
     0     0 38998.7818    0    3          - 38998.7818     -      -    0s
     0     0 38999.2582    0    3          - 38999.2582     -      -    0s
     0     0 38999.2582    0    3          - 38999.2582     -      -    0s
H    0     0                    39261.766824 38999.2582  0.67%     -    0s
     0     2 39015.3555    0    3 39261.7668 39015.3555  0.63%     -    0s
*   27     4               7    39252.122380 39240.6103  0.03%  10.7    0s
H   28     2                    39246.875698 39240.6103  0.02%  10.4    0s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 33 nodes (1041 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924687569829e+04, best bound 3.924614173835e+04, gap 0.0019%