Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:12 2012 Optimize a model with 727 rows, 115 columns and 1454 nonzeros Presolve removed 285 rows and 0 columns Presolve time: 0.01s Presolved: 442 rows, 115 columns, 1155 nonzeros Variable types: 0 continuous, 115 integer (115 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.821429e+01, 239 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.21429 0 107 28.00000 38.21429 36.5% - 0s 0 0 37.73050 0 111 28.00000 37.73050 34.8% - 0s 0 0 37.61687 0 113 28.00000 37.61687 34.3% - 0s 0 0 37.57543 0 113 28.00000 37.57543 34.2% - 0s 0 0 37.43217 0 111 28.00000 37.43217 33.7% - 0s H 0 0 30.0000000 37.43217 24.8% - 0s 0 0 37.25447 0 114 30.00000 37.25447 24.2% - 0s 0 0 37.21655 0 112 30.00000 37.21655 24.1% - 0s 0 0 37.17648 0 113 30.00000 37.17648 23.9% - 0s 0 0 37.08075 0 111 30.00000 37.08075 23.6% - 0s 0 0 37.02994 0 109 30.00000 37.02994 23.4% - 0s 0 0 36.98737 0 111 30.00000 36.98737 23.3% - 0s 0 0 36.98187 0 111 30.00000 36.98187 23.3% - 0s 0 0 36.98187 0 110 30.00000 36.98187 23.3% - 0s H 0 0 31.0000000 36.98187 19.3% - 0s 0 2 36.98173 0 110 31.00000 36.98173 19.3% - 0s H 54 18 32.0000000 36.34604 13.6% 45.5 0s Cutting planes: Gomory: 1 Clique: 7 Zero half: 43 Explored 290 nodes (10909 simplex iterations) in 0.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%