Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:36:26 2012 Optimize a model with 31841 rows, 30450 columns and 125104 nonzeros Presolve removed 350 rows and 2 columns Presolve time: 0.74s Presolved: 31665 rows, 30448 columns, 154148 nonzeros Variable types: 0 continuous, 30448 integer (30448 binary) Found heuristic solution: objective 174.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 284 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 (284 simplex iterations) in 0.84 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%