Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:14:21 2012 Optimize a model with 53409 rows, 47742 columns and 206880 nonzeros Presolve removed 676 rows and 4362 columns Presolve time: 1.33s Presolved: 52733 rows, 43380 columns, 200510 nonzeros Variable types: 0 continuous, 43380 integer (43380 binary) Found heuristic solution: objective 218.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 369 iterations, 0.03 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% - 1s Explored 0 nodes (369 simplex iterations) in 1.49 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%