Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:20:41 2012 Optimize a model with 12799 rows, 16512 columns and 54270 nonzeros Presolve removed 24 rows and 2818 columns Presolve time: 0.27s Presolved: 12775 rows, 13694 columns, 51254 nonzeros Variable types: 0 continuous, 13694 integer (13694 binary) Found heuristic solution: objective 128.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 218 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 142 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (382 simplex iterations) in 0.34 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%