Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:57:40 2012 Optimize a model with 775 rows, 123 columns and 1550 nonzeros Presolve removed 308 rows and 0 columns Presolve time: 0.00s Presolved: 467 rows, 123 columns, 1211 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.148569e+01, 341 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.48569 0 120 30.00000 41.48569 38.3% - 0s 0 0 40.62027 0 120 30.00000 40.62027 35.4% - 0s 0 0 40.34158 0 121 30.00000 40.34158 34.5% - 0s 0 0 40.12781 0 122 30.00000 40.12781 33.8% - 0s 0 0 40.05736 0 120 30.00000 40.05736 33.5% - 0s 0 0 39.93300 0 121 30.00000 39.93300 33.1% - 0s 0 0 39.88718 0 121 30.00000 39.88718 33.0% - 0s 0 0 39.81262 0 122 30.00000 39.81262 32.7% - 0s 0 0 39.76568 0 122 30.00000 39.76568 32.6% - 0s 0 0 39.73796 0 121 30.00000 39.73796 32.5% - 0s 0 0 39.70613 0 121 30.00000 39.70613 32.4% - 0s 0 0 39.68387 0 123 30.00000 39.68387 32.3% - 0s 0 0 39.64876 0 123 30.00000 39.64876 32.2% - 0s 0 0 39.58375 0 122 30.00000 39.58375 31.9% - 0s 0 0 39.51448 0 123 30.00000 39.51448 31.7% - 0s 0 0 39.50200 0 123 30.00000 39.50200 31.7% - 0s H 0 0 31.0000000 39.50200 27.4% - 0s 0 2 39.50189 0 123 31.00000 39.50189 27.4% - 0s * 14 11 10 32.0000000 39.39623 23.1% 59.2 0s H 381 117 33.0000000 37.16306 12.6% 31.5 0s 612 151 36.58768 9 123 33.00000 36.70120 11.2% 29.6 5s Cutting planes: Gomory: 5 Clique: 2 Zero half: 40 Explored 2117 nodes (57821 simplex iterations) in 7.09 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%