Gurobi 5.0.1 (linux64) logging started Sat Nov 17 08:51:28 2012 Optimize a model with 77842 rows, 58322 columns and 290644 nonzeros Presolve removed 501 rows and 4579 columns (presolve time = 5s) ... Presolve removed 503 rows and 4581 columns Presolve time: 6.74s Presolved: 77339 rows, 53741 columns, 284218 nonzeros Variable types: 0 continuous, 53741 integer (53741 binary) Found heuristic solution: objective 241.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 435 iterations, 0.05 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% - 6s Explored 0 nodes (435 simplex iterations) in 6.98 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%