Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:57:49 2012 Optimize a model with 760 rows, 123 columns and 1520 nonzeros Presolve removed 289 rows and 0 columns Presolve time: 0.01s Presolved: 471 rows, 123 columns, 1196 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.222917e+01, 322 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.22917 0 118 28.00000 42.22917 50.8% - 0s H 0 0 29.0000000 42.22917 45.6% - 0s 0 0 41.95353 0 118 29.00000 41.95353 44.7% - 0s H 0 0 30.0000000 41.95353 39.8% - 0s 0 0 41.56242 0 120 30.00000 41.56242 38.5% - 0s 0 0 41.23067 0 114 30.00000 41.23067 37.4% - 0s 0 0 41.11470 0 120 30.00000 41.11470 37.0% - 0s 0 0 40.83530 0 119 30.00000 40.83530 36.1% - 0s H 0 0 31.0000000 40.83530 31.7% - 0s 0 0 40.62210 0 118 31.00000 40.62210 31.0% - 0s 0 0 40.57412 0 116 31.00000 40.57412 30.9% - 0s 0 0 40.48027 0 117 31.00000 40.48027 30.6% - 0s 0 0 40.41508 0 116 31.00000 40.41508 30.4% - 0s 0 0 40.31694 0 116 31.00000 40.31694 30.1% - 0s 0 0 40.27273 0 121 31.00000 40.27273 29.9% - 0s 0 0 40.17273 0 119 31.00000 40.17273 29.6% - 0s 0 0 40.16173 0 118 31.00000 40.16173 29.6% - 0s 0 0 40.10944 0 118 31.00000 40.10944 29.4% - 0s 0 0 40.08392 0 119 31.00000 40.08392 29.3% - 0s 0 0 40.07104 0 120 31.00000 40.07104 29.3% - 0s 0 0 40.07104 0 118 31.00000 40.07104 29.3% - 0s 0 2 40.05201 0 118 31.00000 40.05201 29.2% - 0s H 9 9 32.0000000 40.03951 25.1% 95.3 0s H 40 14 34.0000000 39.57670 16.4% 53.4 0s H 42 15 35.0000000 39.57670 13.1% 53.8 0s Cutting planes: Clique: 4 Zero half: 67 Explored 270 nodes (12164 simplex iterations) in 0.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%