Gurobi 5.0.1 (linux64) logging started Tue Dec 25 15:25:03 2012

Optimize a model with 902 rows, 840 columns and 3600 nonzeros
Presolve removed 175 rows and 40 columns
Presolve time: 0.03s
Presolved: 727 rows, 800 columns, 3326 nonzeros
Variable types: 380 continuous, 420 integer (420 binary)

Root relaxation: objective 1.882917e+02, 701 iterations, 0.02 seconds

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

     0     0  188.29173    0   51          -  188.29173     -      -    0s
     0     0  212.29912    0   49          -  212.29912     -      -    0s
     0     0  217.60082    0   46          -  217.60082     -      -    0s
     0     0  222.52735    0   51          -  222.52735     -      -    0s
     0     0  224.72479    0   46          -  224.72479     -      -    0s
     0     0  224.86800    0   47          -  224.86800     -      -    0s
     0     0  225.09403    0   47          -  225.09403     -      -    0s
     0     2  225.09403    0   45          -  225.09403     -      -    0s
*   54    50              49     313.0000000  226.22549  27.7%  27.7    0s
H  163   124                     312.0000000  227.44333  27.1%  35.0    0s
H  193    95                     276.0000000  227.44333  17.6%  41.7    0s
  2274   750  257.67202   27   25  276.00000  248.10290  10.1%  31.1    5s
* 4403  1173              42     272.0000000  251.47052  7.55%  29.0    7s
  6575   899     cutoff   38       272.00000  256.09091  5.85%  28.8   10s

Cutting planes:
  Gomory: 15
  Cover: 15
  Implied bound: 65
  Flow cover: 58
  GUB cover: 5
  Zero half: 3

Explored 8244 nodes (229683 simplex iterations) in 11.81 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.720000000000e+02, best bound 2.720000000000e+02, gap 0.0%