Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:41:46 2012

Optimize a model with 357 rows, 258 columns and 1148 nonzeros
Presolve time: 0.00s
Presolved: 357 rows, 258 columns, 1148 nonzeros
Variable types: 0 continuous, 258 integer (258 binary)
Found heuristic solution: objective 85.0000000

Root relaxation: objective 0.000000e+00, 102 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   80   85.00000    0.00000   100%     -    0s
H    0     0                      81.0000000    0.00000   100%     -    0s
H    0     0                      73.0000000    0.00000   100%     -    0s
H    0     0                      64.0000000    0.00000   100%     -    0s
     0     0    0.60606    0   81   64.00000    0.60606  99.1%     -    0s
H    0     0                      61.0000000    0.60606  99.0%     -    0s
     0     0    1.33848    0   84   61.00000    1.33848  97.8%     -    0s
H    0     0                      55.0000000    1.33848  97.6%     -    0s
     0     0    1.45386    0   84   55.00000    1.45386  97.4%     -    0s
     0     0    1.45609    0   85   55.00000    1.45609  97.4%     -    0s
     0     2    1.46388    0   85   55.00000    1.46388  97.3%     -    0s
*   32    32              18      39.0000000    4.86814  87.5%  30.9    0s
*   37    31              20      38.0000000    4.86814  87.2%  28.4    0s
H   81    60                      37.0000000    6.47217  82.5%  30.2    0s
*  100    67              23      32.0000000    6.47217  79.8%  27.5    0s
H 2041   228                      31.0000000   21.65455  30.1%  24.4    1s

Explored 3398 nodes (78750 simplex iterations) in 3.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%