Gurobi 5.0.1 (linux64) logging started Tue Nov 20 15:55:16 2012 Optimize a model with 28 rows, 72 columns and 56 nonzeros Presolve removed 28 rows and 72 columns Presolve time: 0.00s 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 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%