Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:18:18 2012 Optimize a model with 28559 rows, 28392 columns and 113230 nonzeros Presolve removed 363 rows and 4202 columns Presolve time: 0.67s Presolved: 28196 rows, 24190 columns, 107854 nonzeros Variable types: 0 continuous, 24190 integer (24190 binary) Found heuristic solution: objective 168.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 250 iterations, 0.02 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 (250 simplex iterations) in 0.75 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%