Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:44:37 2012 Optimize a model with 14489 rows, 19182 columns and 61960 nonzeros Presolve removed 308 rows and 4142 columns Presolve time: 0.29s Presolved: 14181 rows, 15040 columns, 56924 nonzeros Variable types: 0 continuous, 15040 integer (15040 binary) Found heuristic solution: objective 138.0000000 Root relaxation: objective 3.000000e+00, 9823 iterations, 0.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 12 138.00000 3.00000 97.8% - 4s H 0 0 3.0000000 3.00000 0.0% - 4s Explored 0 nodes (27035 simplex iterations) in 4.33 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%