Gurobi 5.0.1 (linux64) logging started Fri Nov 16 23:48:43 2012 Optimize a model with 47907 rows, 41412 columns and 184119 nonzeros Presolve removed 430 rows and 4468 columns Presolve time: 1.17s Presolved: 47477 rows, 36944 columns, 178170 nonzeros Variable types: 0 continuous, 36944 integer (36944 binary) Found heuristic solution: objective 203.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 343 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 (343 simplex iterations) in 1.32 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%