Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:42:49 2012

Optimize a model with 199 rows, 143 columns and 638 nonzeros
Presolve time: 0.00s
Presolved: 199 rows, 143 columns, 638 nonzeros
Variable types: 0 continuous, 143 integer (143 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 0.000000e+00, 71 iterations, 0.00 seconds

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

     0     0    0.00000    0   43   43.00000    0.00000   100%     -    0s
H    0     0                      35.0000000    0.00000   100%     -    0s
H    0     0                      34.0000000    0.00000   100%     -    0s
H    0     0                      31.0000000    0.00000   100%     -    0s
     0     0    0.48837    0   44   31.00000    0.48837  98.4%     -    0s
     0     0    1.00374    0   46   31.00000    1.00374  96.8%     -    0s
     0     0    1.20780    0   47   31.00000    1.20780  96.1%     -    0s
     0     0    1.21342    0   48   31.00000    1.21342  96.1%     -    0s
     0     2    1.21882    0   48   31.00000    1.21882  96.1%     -    0s
*   24    24              16      28.0000000    2.66527  90.5%  27.2    0s
*   43    27              10      22.0000000    2.68067  87.8%  27.2    0s
*   57    30               8      19.0000000    5.12549  73.0%  26.8    0s

Cutting planes:
  Gomory: 4
  Zero half: 2

Explored 284 nodes (6869 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%