Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:46:11 2012 Optimize a model with 28479 rows, 31862 columns and 116410 nonzeros Presolve removed 379 rows and 3740 columns Presolve time: 0.69s Presolved: 28100 rows, 28122 columns, 111466 nonzeros Variable types: 0 continuous, 28122 integer (28122 binary) Found heuristic solution: objective 178.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 267 iterations, 0.01 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 (267 simplex iterations) in 0.77 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%