Gurobi 5.0.1 (linux64) logging started Sat Nov 17 00:20:54 2012 Optimize a model with 50093 rows, 43056 columns and 192301 nonzeros Presolve removed 431 rows and 3107 columns Presolve time: 1.26s Presolved: 49662 rows, 39949 columns, 187681 nonzeros Variable types: 0 continuous, 39949 integer (39949 binary) Found heuristic solution: objective 207.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 326 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% - 1s Explored 0 nodes (326 simplex iterations) in 1.40 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%