Gurobi 5.0.1 (linux64) logging started Fri Nov 16 23:32:09 2012 Optimize a model with 42209 rows, 40602 columns and 166225 nonzeros Presolve removed 429 rows and 5027 columns Presolve time: 1.02s Presolved: 41780 rows, 35575 columns, 159779 nonzeros Variable types: 0 continuous, 35575 integer (35575 binary) Found heuristic solution: objective 201.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 324 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% - 1s Explored 0 nodes (324 simplex iterations) in 1.15 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%