Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:46:42 2012 Optimize a model with 15509 rows, 20022 columns and 65845 nonzeros Presolve removed 880 rows and 4514 columns Presolve time: 0.32s Presolved: 14629 rows, 15508 columns, 59010 nonzeros Variable types: 0 continuous, 15508 integer (15508 binary) Found heuristic solution: objective 141.0000000 Root relaxation: objective 3.000000e+00, 10010 iterations, 0.80 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 3.0000000 3.00000 0.0% - 4s Explored 0 nodes (27931 simplex iterations) in 4.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%