Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:59 2012 Optimize a model with 103 rows, 90 columns and 345 nonzeros Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 103 rows, 87 columns, 342 nonzeros Variable types: 0 continuous, 87 integer (86 binary) Found heuristic solution: objective 15.0000000 Root relaxation: objective 0.000000e+00, 51 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 35 15.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.45714 0 36 8.00000 0.45714 94.3% - 0s H 0 0 7.0000000 0.45714 93.5% - 0s 0 0 1.00000 0 37 7.00000 1.00000 85.7% - 0s 0 0 1.00149 0 38 7.00000 1.00149 85.7% - 0s 0 2 1.00370 0 38 7.00000 1.00370 85.7% - 0s * 45 5 8 6.0000000 4.12150 31.3% 16.1 0s Cutting planes: Gomory: 5 Zero half: 2 Explored 51 nodes (978 simplex iterations) in 0.05 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%