Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:13 2012 Optimize a model with 147 rows, 127 columns and 492 nonzeros Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 147 rows, 124 columns, 489 nonzeros Variable types: 0 continuous, 124 integer (123 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 0.000000e+00, 80 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 48 27.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.54044 0 49 20.00000 0.54044 97.3% - 0s H 0 0 19.0000000 0.54044 97.2% - 0s 0 0 1.14279 0 51 19.00000 1.14279 94.0% - 0s H 0 0 18.0000000 1.14279 93.7% - 0s 0 0 1.31727 0 52 18.00000 1.31727 92.7% - 0s H 0 0 12.0000000 1.31727 89.0% - 0s 0 0 1.33408 0 54 12.00000 1.33408 88.9% - 0s 0 0 1.33408 0 54 12.00000 1.33408 88.9% - 0s 0 2 1.44964 0 54 12.00000 1.44964 87.9% - 0s * 16 14 12 11.0000000 3.30002 70.0% 21.6 0s * 27 12 6 10.0000000 3.33086 66.7% 19.6 0s * 43 15 9 9.0000000 5.15385 42.7% 15.7 0s Cutting planes: Gomory: 4 Zero half: 1 Explored 90 nodes (1536 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%