Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:12:00 2012 Optimize a model with 972 rows, 132 columns and 1944 nonzeros Presolve removed 398 rows and 0 columns Presolve time: 0.01s Presolved: 574 rows, 132 columns, 1546 nonzeros Variable types: 0 continuous, 132 integer (132 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.233699e+01, 350 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.33699 0 131 26.00000 42.33699 62.8% - 0s H 0 0 28.0000000 42.33699 51.2% - 0s 0 0 42.04141 0 132 28.00000 42.04141 50.1% - 0s H 0 0 29.0000000 42.04141 45.0% - 0s 0 0 41.90297 0 130 29.00000 41.90297 44.5% - 0s 0 0 41.76334 0 129 29.00000 41.76334 44.0% - 0s 0 0 41.59743 0 131 29.00000 41.59743 43.4% - 0s H 0 0 30.0000000 41.59743 38.7% - 0s 0 0 41.47611 0 130 30.00000 41.47611 38.3% - 0s 0 0 41.39781 0 129 30.00000 41.39781 38.0% - 0s 0 0 41.31237 0 131 30.00000 41.31237 37.7% - 0s 0 0 41.16229 0 129 30.00000 41.16229 37.2% - 0s H 0 0 31.0000000 41.16229 32.8% - 0s 0 0 41.12601 0 129 31.00000 41.12601 32.7% - 0s 0 0 41.05661 0 130 31.00000 41.05661 32.4% - 0s 0 0 41.00227 0 131 31.00000 41.00227 32.3% - 0s 0 0 40.98726 0 131 31.00000 40.98726 32.2% - 0s 0 0 40.93897 0 130 31.00000 40.93897 32.1% - 0s 0 0 40.93046 0 130 31.00000 40.93046 32.0% - 0s 0 0 40.92563 0 130 31.00000 40.92563 32.0% - 0s 0 0 40.92563 0 130 31.00000 40.92563 32.0% - 0s 0 2 40.92533 0 130 31.00000 40.92533 32.0% - 0s H 516 199 32.0000000 38.07192 19.0% 36.8 1s 2735 627 34.45055 26 78 32.00000 35.69231 11.5% 33.5 5s Cutting planes: Clique: 6 Zero half: 30 Explored 5507 nodes (157442 simplex iterations) in 7.43 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%