Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:12:29 2012 Optimize a model with 22604 rows, 27390 columns and 94378 nonzeros Presolve removed 37 rows and 5777 columns Presolve time: 0.48s Presolved: 22567 rows, 21613 columns, 88329 nonzeros Variable types: 0 continuous, 21613 integer (21613 binary) Found heuristic solution: objective 165.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 280 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 226 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (561 simplex iterations) in 0.61 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%