Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:59:09 2012 Optimize a model with 62100 rows, 49062 columns and 234258 nonzeros Presolve removed 906 rows and 4422 columns Presolve time: 4.36s Presolved: 61194 rows, 44640 columns, 227074 nonzeros Variable types: 0 continuous, 44640 integer (44640 binary) Found heuristic solution: objective 221.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 378 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 infeasible 0 3.00000 2.00000 33.3% - 4s Explored 0 nodes (378 simplex iterations) in 4.55 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%