Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:31:59 2012

Optimize a model with 85 rows, 58 columns and 170 nonzeros
Presolve removed 71 rows and 46 columns
Presolve time: 0.00s
Presolved: 14 rows, 12 columns, 28 nonzeros
Variable types: 0 continuous, 12 integer (12 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.100000e+01, 11 iterations, 0.00 seconds

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

*    0     0               0      31.0000000   31.00000   0.0%     -    0s

Explored 0 nodes (11 simplex iterations) in 0.00 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%