Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:21 2012 Optimize a model with 589 rows, 109 columns and 1178 nonzeros Presolve removed 215 rows and 0 columns Presolve time: 0.00s Presolved: 374 rows, 109 columns, 920 nonzeros Variable types: 0 continuous, 109 integer (109 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.845000e+01, 258 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.45000 0 106 27.00000 38.45000 42.4% - 0s H 0 0 28.0000000 38.45000 37.3% - 0s 0 0 37.88706 0 108 28.00000 37.88706 35.3% - 0s H 0 0 29.0000000 37.88706 30.6% - 0s 0 0 37.65147 0 107 29.00000 37.65147 29.8% - 0s 0 0 37.35535 0 108 29.00000 37.35535 28.8% - 0s 0 0 37.14595 0 109 29.00000 37.14595 28.1% - 0s 0 0 37.01357 0 107 29.00000 37.01357 27.6% - 0s H 0 0 30.0000000 37.01357 23.4% - 0s 0 0 36.97087 0 106 30.00000 36.97087 23.2% - 0s 0 0 36.84409 0 107 30.00000 36.84409 22.8% - 0s 0 0 36.64124 0 108 30.00000 36.64124 22.1% - 0s 0 0 36.56778 0 107 30.00000 36.56778 21.9% - 0s 0 0 36.53724 0 109 30.00000 36.53724 21.8% - 0s 0 0 36.49749 0 108 30.00000 36.49749 21.7% - 0s 0 0 36.43613 0 109 30.00000 36.43613 21.5% - 0s 0 0 36.40103 0 108 30.00000 36.40103 21.3% - 0s 0 0 36.27817 0 109 30.00000 36.27817 20.9% - 0s 0 0 36.22915 0 109 30.00000 36.22915 20.8% - 0s 0 0 36.21823 0 109 30.00000 36.21823 20.7% - 0s 0 0 36.21823 0 108 30.00000 36.21823 20.7% - 0s 0 2 36.19827 0 108 30.00000 36.19827 20.7% - 0s * 89 26 10 31.0000000 35.45894 14.4% 30.6 0s Cutting planes: Clique: 1 Zero half: 51 Explored 670 nodes (16354 simplex iterations) in 0.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%