Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:13:56 2012

Optimize a model with 31 rows, 72 columns and 147 nonzeros
Presolve removed 13 rows and 52 columns
Presolve time: 0.00s
Presolved: 18 rows, 20 columns, 54 nonzeros
Variable types: 0 continuous, 20 integer (20 binary)
Found heuristic solution: objective 0.0000000

Root relaxation: cutoff, 0 iterations, 0.00 seconds

Explored 0 nodes (0 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0%