Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:53:14 2012 Optimize a model with 18749 rows, 22650 columns and 78148 nonzeros Presolve removed 329 rows and 4052 columns Presolve time: 0.41s Presolved: 18420 rows, 18598 columns, 73102 nonzeros Variable types: 0 continuous, 18598 integer (18598 binary) Found heuristic solution: objective 150.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 205 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 (205 simplex iterations) in 0.46 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%