Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:47:40 2012 Optimize a model with 56319 rows, 48620 columns and 216478 nonzeros Presolve removed 460 rows and 3962 columns Presolve time: 1.33s Presolved: 55859 rows, 44658 columns, 210910 nonzeros Variable types: 0 continuous, 44658 integer (44658 binary) Found heuristic solution: objective 220.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 375 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 (375 simplex iterations) in 1.50 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%