Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:40:30 2012 Optimize a model with 307 rows, 325 columns and 1090 nonzeros Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 307 rows, 297 columns, 1062 nonzeros Variable types: 0 continuous, 297 integer (296 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 0.000000e+00, 188 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 0 123 50.00000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s 0 0 0.14650 0 124 34.00000 0.14650 100% - 0s H 0 0 25.0000000 0.14650 99.4% - 0s H 0 0 19.0000000 0.14650 99.2% - 0s 0 0 1.00000 0 123 19.00000 1.00000 94.7% - 0s H 0 0 14.0000000 1.00000 92.9% - 0s 0 0 1.00000 0 126 14.00000 1.00000 92.9% - 0s 0 0 1.00000 0 125 14.00000 1.00000 92.9% - 0s H 0 0 11.0000000 1.00000 90.9% - 0s 0 2 1.00000 0 116 11.00000 1.00000 90.9% - 0s * 18 18 14 8.0000000 1.85000 76.9% 58.6 0s * 21 9 13 7.0000000 1.85000 73.6% 53.4 0s * 34 13 11 6.0000000 1.90244 68.3% 40.6 0s Cutting planes: Gomory: 3 Explored 61 nodes (2658 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%