Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:51 2012 Optimize a model with 655 rows, 117 columns and 1310 nonzeros Presolve removed 260 rows and 0 columns Presolve time: 0.00s Presolved: 395 rows, 117 columns, 993 nonzeros Variable types: 0 continuous, 117 integer (117 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.963012e+01, 259 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.63012 0 113 27.00000 39.63012 46.8% - 0s H 0 0 29.0000000 39.63012 36.7% - 0s 0 0 39.17403 0 115 29.00000 39.17403 35.1% - 0s 0 0 38.97969 0 115 29.00000 38.97969 34.4% - 0s 0 0 38.89897 0 114 29.00000 38.89897 34.1% - 0s 0 0 38.75040 0 116 29.00000 38.75040 33.6% - 0s H 0 0 30.0000000 38.75040 29.2% - 0s 0 0 38.68239 0 113 30.00000 38.68239 28.9% - 0s 0 0 38.56458 0 113 30.00000 38.56458 28.5% - 0s 0 0 38.45699 0 112 30.00000 38.45699 28.2% - 0s 0 0 38.38471 0 112 30.00000 38.38471 27.9% - 0s 0 0 38.33696 0 114 30.00000 38.33696 27.8% - 0s 0 0 38.29685 0 113 30.00000 38.29685 27.7% - 0s 0 0 38.12116 0 113 30.00000 38.12116 27.1% - 0s 0 0 38.07147 0 116 30.00000 38.07147 26.9% - 0s 0 0 38.06716 0 116 30.00000 38.06716 26.9% - 0s 0 0 38.06716 0 116 30.00000 38.06716 26.9% - 0s H 0 0 31.0000000 38.06716 22.8% - 0s 0 2 38.06697 0 116 31.00000 38.06697 22.8% - 0s H 159 52 32.0000000 36.75618 14.9% 27.5 0s * 225 46 10 33.0000000 36.44792 10.4% 25.9 0s Cutting planes: Clique: 2 Zero half: 49 Explored 680 nodes (17538 simplex iterations) in 0.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%