Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:14 2013

Optimize a model with 440 rows, 4340 columns and 9520 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 420 rows, 4320 columns, 9300 nonzeros
Variable types: 4240 continuous, 80 integer (80 binary)

Root relaxation: objective 4.642213e+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 46422.1265    0    9          - 46422.1265     -      -    0s
     0     0 46439.5557    0    6          - 46439.5557     -      -    0s
     0     0 46440.0930    0    9          - 46440.0930     -      -    0s
     0     0 46442.6387    0    6          - 46442.6387     -      -    0s
     0     0 46442.6387    0    6          - 46442.6387     -      -    0s
     0     0 46442.6387    0    6          - 46442.6387     -      -    0s
     0     0 46442.6387    0    6          - 46442.6387     -      -    0s
     0     0 46442.6387    0    6          - 46442.6387     -      -    0s
H    0     0                    47019.374336 46442.6387  1.23%     -    0s
     0     1 46684.5565    0    6 47019.3743 46684.5565  0.71%     -    0s
*    6     4               4    46742.720716 46742.7207   0.0%  40.3    0s

Cutting planes:
  Flow cover: 5

Explored 7 nodes (1176 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.674272071620e+04, best bound 4.674272071620e+04, gap 0.0%