Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:34:27 2012 Optimize a model with 76505 rows, 60762 columns and 289048 nonzeros Presolve removed 508 rows and 3936 columns (presolve time = 5s) ... Presolve removed 510 rows and 3938 columns Presolve time: 6.87s Presolved: 75995 rows, 56824 columns, 283264 nonzeros Variable types: 0 continuous, 56824 integer (56824 binary) Found heuristic solution: objective 246.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 435 iterations, 0.04 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% - 7s Explored 0 nodes (435 simplex iterations) in 7.10 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%