Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:50:49 2012 Optimize a model with 8533 rows, 2862 columns and 28249 nonzeros Presolve time: 0.08s Presolved: 8533 rows, 2862 columns, 28643 nonzeros Variable types: 0 continuous, 2862 integer (2862 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 2.000000e+00, 2795 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 106 31.00000 2.00000 93.5% - 0s H 0 0 11.0000000 2.00000 81.8% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s 0 0 2.00000 0 106 4.00000 2.00000 50.0% - 1s 0 0 2.00000 0 106 4.00000 2.00000 50.0% - 3s 0 0 2.00000 0 106 4.00000 2.00000 50.0% - 6s 0 0 2.00000 0 106 4.00000 2.00000 50.0% - 9s 0 0 2.00000 0 106 4.00000 2.00000 50.0% - 11s 0 0 2.00000 0 106 4.00000 2.00000 50.0% - 14s 0 2 2.00000 0 106 4.00000 2.00000 50.0% - 20s 2 4 3.00000 1 346 4.00000 3.00000 25.0% 13835 27s 33 6 cutoff 7 4.00000 3.00000 25.0% 1342 30s 51 6 3.00000 4 90 4.00000 3.00000 25.0% 1367 35s 92 3 cutoff 9 4.00000 3.00000 25.0% 1096 40s Cutting planes: Clique: 123 Explored 104 nodes (158528 simplex iterations) in 40.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%