Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:12 2012 Optimize a model with 181 rows, 148 columns and 598 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 181 rows, 147 columns, 597 nonzeros Variable types: 0 continuous, 147 integer (146 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 0.000000e+00, 90 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 56 44.00000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.32335 0 58 31.00000 0.32335 99.0% - 0s 0 0 0.82679 0 60 31.00000 0.82679 97.3% - 0s 0 0 0.82907 0 61 31.00000 0.82907 97.3% - 0s H 0 0 29.0000000 0.82907 97.1% - 0s H 0 0 21.0000000 0.82907 96.1% - 0s 0 2 0.89499 0 61 21.00000 0.89499 95.7% - 0s * 14 14 9 13.0000000 3.56742 72.6% 35.7 0s Cutting planes: Gomory: 4 Zero half: 1 Explored 187 nodes (3916 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%