Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:31 2012 Optimize a model with 616 rows, 110 columns and 1232 nonzeros Presolve removed 233 rows and 0 columns Presolve time: 0.00s Presolved: 383 rows, 110 columns, 973 nonzeros Variable types: 0 continuous, 110 integer (110 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.818461e+01, 300 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.18461 0 108 25.00000 38.18461 52.7% - 0s H 0 0 27.0000000 38.18461 41.4% - 0s H 0 0 30.0000000 38.18461 27.3% - 0s 0 0 37.75739 0 106 30.00000 37.75739 25.9% - 0s 0 0 37.45639 0 108 30.00000 37.45639 24.9% - 0s 0 0 37.19661 0 110 30.00000 37.19661 24.0% - 0s 0 0 36.74595 0 108 30.00000 36.74595 22.5% - 0s 0 0 36.58105 0 108 30.00000 36.58105 21.9% - 0s 0 0 36.54633 0 109 30.00000 36.54633 21.8% - 0s 0 0 36.47720 0 107 30.00000 36.47720 21.6% - 0s 0 0 36.23681 0 109 30.00000 36.23681 20.8% - 0s 0 0 36.18934 0 109 30.00000 36.18934 20.6% - 0s 0 0 36.12070 0 108 30.00000 36.12070 20.4% - 0s 0 0 36.10006 0 110 30.00000 36.10006 20.3% - 0s 0 0 36.10006 0 110 30.00000 36.10006 20.3% - 0s 0 2 36.09994 0 110 30.00000 36.09994 20.3% - 0s H 189 42 31.0000000 34.52030 11.4% 33.6 0s H 302 33 32.0000000 34.05163 6.41% 32.4 0s Cutting planes: Clique: 1 Zero half: 50 Explored 361 nodes (11985 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%