Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:22:33 2012 Optimize a model with 7994 rows, 4290 columns and 27948 nonzeros Presolve removed 1172 rows and 2 columns Presolve time: 0.26s Presolved: 6887 rows, 4288 columns, 29103 nonzeros Variable types: 0 continuous, 4288 integer (4288 binary) Found heuristic solution: objective 65.0000000 Root relaxation: objective 3.000000e+00, 4921 iterations, 0.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 73 65.00000 3.00000 95.4% - 2s H 0 0 58.0000000 3.00000 94.8% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s H 0 0 3.0000000 3.00000 0.0% - 2s Explored 0 nodes (17115 simplex iterations) in 2.19 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%