Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:41 2013

Optimize a model with 428 rows, 1244 columns and 3282 nonzeros
Presolve removed 397 rows and 1147 columns
Presolve time: 0.03s
Presolved: 31 rows, 97 columns, 194 nonzeros
Variable types: 72 continuous, 25 integer (25 binary)

Root relaxation: objective 4.810927e+03, 6 iterations, 0.00 seconds

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

     0     0 4810.92679    0    2          - 4810.92679     -      -    0s
     0     0 4830.95533    0    4          - 4830.95533     -      -    0s
     0     0 4830.95570    0    4          - 4830.95570     -      -    0s
     0     0 4830.98223    0    4          - 4830.98223     -      -    0s
H    0     0                    4831.8834450 4830.98223  0.02%     -    0s
     0     0 4830.98223    0    2 4831.88344 4830.98223  0.02%     -    0s
     0     0 4831.00021    0    4 4831.88344 4831.00021  0.02%     -    0s
     0     0 4831.00045    0    4 4831.88344 4831.00045  0.02%     -    0s
     0     0 4831.01817    0    4 4831.88344 4831.01817  0.02%     -    0s
     0     0 4831.03613    0    4 4831.88344 4831.03613  0.02%     -    0s
     0     0 4831.05410    0    4 4831.88344 4831.05410  0.02%     -    0s
     0     0 4831.07207    0    4 4831.88344 4831.07207  0.02%     -    0s
     0     0 4831.09004    0    4 4831.88344 4831.09004  0.02%     -    0s
     0     0 4831.09883    0    4 4831.88344 4831.09883  0.02%     -    0s
H    0     0                    4831.5658194 4831.09883  0.01%     -    0s

Cutting planes:
  Cover: 2
  Flow cover: 1

Explored 0 nodes (85 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831565819393e+03, best bound 4.831098825035e+03, gap 0.0097%