Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:01:13 2012

Optimize a model with 902 rows, 840 columns and 3680 nonzeros
Presolve removed 99 rows and 40 columns
Presolve time: 0.02s
Presolved: 803 rows, 800 columns, 3481 nonzeros
Variable types: 380 continuous, 420 integer (420 binary)

Root relaxation: objective 2.211799e+02, 717 iterations, 0.02 seconds

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

     0     0  221.17993    0   51          -  221.17993     -      -    0s
     0     0  279.09576    0   50          -  279.09576     -      -    0s
     0     0  287.54813    0   32          -  287.54813     -      -    0s
     0     0  288.67267    0   38          -  288.67267     -      -    0s
     0     0  289.04209    0   41          -  289.04209     -      -    0s
     0     0  289.07233    0   30          -  289.07233     -      -    0s
     0     0  289.07233    0   30          -  289.07233     -      -    0s
     0     0  289.07233    0   30          -  289.07233     -      -    0s
     0     2  290.05315    0   30          -  290.05315     -      -    0s
*   55    11              13     319.0000000  309.52091  2.97%  49.2    0s
*   56     9              12     317.0000000  309.52091  2.36%  49.0    0s

Cutting planes:
  Gomory: 2
  Cover: 15
  Implied bound: 1
  Flow cover: 14
  GUB cover: 3

Explored 67 nodes (4202 simplex iterations) in 0.58 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.170000000000e+02, best bound 3.170000000000e+02, gap 0.0%