Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:48:22 2012 Optimize a model with 15157 rows, 20592 columns and 65349 nonzeros Presolve removed 324 rows and 5150 columns Presolve time: 0.31s Presolved: 14833 rows, 15442 columns, 59278 nonzeros Variable types: 0 continuous, 15442 integer (15442 binary) Found heuristic solution: objective 143.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 175 iterations, 0.01 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% - 0s Explored 0 nodes (175 simplex iterations) in 0.35 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%