Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:31:55 2012 Optimize a model with 27 rows, 33 columns and 54 nonzeros Presolve removed 27 rows and 33 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 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%