Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:26 2012 Optimize a model with 137 rows, 123 columns and 463 nonzeros Presolve removed 0 rows and 5 columns Presolve time: 0.00s Presolved: 137 rows, 118 columns, 458 nonzeros Variable types: 0 continuous, 118 integer (117 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 49 18.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.34197 0 51 13.00000 0.34197 97.4% - 0s H 0 0 12.0000000 0.34197 97.2% - 0s 0 0 0.84837 0 55 12.00000 0.84837 92.9% - 0s 0 0 0.85136 0 55 12.00000 0.85136 92.9% - 0s 0 0 0.85136 0 55 12.00000 0.85136 92.9% - 0s 0 2 0.85370 0 55 12.00000 0.85370 92.9% - 0s * 17 12 12 9.0000000 2.25360 75.0% 17.4 0s * 33 10 11 8.0000000 2.82544 64.7% 14.5 0s * 43 6 6 7.0000000 3.87891 44.6% 15.9 0s Cutting planes: Gomory: 4 Mod-K: 1 Explored 58 nodes (1204 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%