Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:31:47 2012 Optimize a model with 15794 rows, 18360 columns and 65068 nonzeros Presolve removed 295 rows and 3107 columns Presolve time: 0.32s Presolved: 15499 rows, 15253 columns, 61058 nonzeros Variable types: 0 continuous, 15253 integer (15253 binary) Found heuristic solution: objective 135.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 190 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 (190 simplex iterations) in 0.36 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%