Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:49:54 2013 Optimize a model with 12 rows, 12 columns and 23 nonzeros Presolve removed 12 rows and 12 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 1.931000000000e+03, best bound 1.931000000000e+03, gap 0.0%