Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:55:36 2012 Optimize a model with 731 rows, 121 columns and 1462 nonzeros Presolve removed 256 rows and 0 columns Presolve time: 0.00s Presolved: 475 rows, 121 columns, 1192 nonzeros Variable types: 0 continuous, 121 integer (121 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 4.200000e+01, 281 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.00000 0 111 25.00000 42.00000 68.0% - 0s H 0 0 28.0000000 42.00000 50.0% - 0s 0 0 41.21588 0 120 28.00000 41.21588 47.2% - 0s H 0 0 30.0000000 41.21588 37.4% - 0s 0 0 40.76870 0 120 30.00000 40.76870 35.9% - 0s 0 0 40.49580 0 120 30.00000 40.49580 35.0% - 0s 0 0 40.31337 0 119 30.00000 40.31337 34.4% - 0s 0 0 40.06010 0 120 30.00000 40.06010 33.5% - 0s 0 0 39.87662 0 120 30.00000 39.87662 32.9% - 0s 0 0 39.79096 0 120 30.00000 39.79096 32.6% - 0s 0 0 39.47029 0 118 30.00000 39.47029 31.6% - 0s 0 0 39.32695 0 119 30.00000 39.32695 31.1% - 0s 0 0 39.17463 0 119 30.00000 39.17463 30.6% - 0s 0 0 39.13200 0 119 30.00000 39.13200 30.4% - 0s 0 0 39.10123 0 120 30.00000 39.10123 30.3% - 0s 0 0 39.09804 0 119 30.00000 39.09804 30.3% - 0s 0 0 39.09604 0 119 30.00000 39.09604 30.3% - 0s 0 0 39.09604 0 119 30.00000 39.09604 30.3% - 0s 0 2 39.09502 0 119 30.00000 39.09502 30.3% - 0s * 53 35 13 31.0000000 38.59484 24.5% 44.4 0s 613 245 34.74667 16 118 31.00000 36.36187 17.3% 28.8 5s 816 339 34.23577 31 85 31.00000 36.36187 17.3% 36.0 10s H 2049 482 32.0000000 35.55000 11.1% 27.7 11s Cutting planes: Gomory: 1 Clique: 1 Zero half: 56 Explored 4072 nodes (94694 simplex iterations) in 12.83 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%