Gurobi 5.0.1 (linux64) logging started Sat Dec  8 02:37:05 2012

Optimize a model with 285 rows, 270 columns and 888 nonzeros
Presolve removed 21 rows and 12 columns
Presolve time: 0.00s
Presolved: 264 rows, 258 columns, 840 nonzeros
Variable types: 171 continuous, 87 integer (87 binary)

Root relaxation: objective 2.514483e+04, 152 iterations, 0.00 seconds

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

     0     0 25144.8280    0   51          - 25144.8280     -      -    0s
     0     0 30616.0442    0   25          - 30616.0442     -      -    0s
     0     0 30860.8445    0   27          - 30860.8445     -      -    0s
     0     0 31084.4695    0   24          - 31084.4695     -      -    0s
     0     0 31096.3269    0   23          - 31096.3269     -      -    0s
     0     0 31119.6258    0   27          - 31119.6258     -      -    0s
     0     2 31120.6119    0   27          - 31120.6119     -      -    0s
*  110    89              46    34154.000000 31134.2654  8.84%   9.0    0s
H  600   367                    33971.000000 31465.7068  7.37%  10.6    0s
*  969   468              68    33909.000000 31484.0464  7.15%  11.7    0s
* 1269   488              64    33539.000000 31547.5467  5.94%  11.2    0s
H 2208   767                    33430.000000 31807.3484  4.85%  10.6    1s
 12996  2766 32970.7589   23   26 33430.0000 32615.7303  2.44%  10.0    5s
*15475  2642              59    33334.000000 32715.4151  1.86%   9.9    5s

Cutting planes:
  Gomory: 8
  Cover: 2
  Flow cover: 36
  Flow path: 17

Explored 23761 nodes (215344 simplex iterations) in 8.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.333400000000e+04, best bound 3.333117383175e+04, gap 0.0085%