Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:09 2012 Optimize a model with 631 rows, 115 columns and 1262 nonzeros Presolve removed 236 rows and 0 columns Presolve time: 0.00s Presolved: 395 rows, 115 columns, 994 nonzeros Variable types: 0 continuous, 115 integer (115 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.148000e+01, 302 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.48000 0 110 30.00000 41.48000 38.3% - 0s H 0 0 31.0000000 41.48000 33.8% - 0s 0 0 40.80262 0 113 31.00000 40.80262 31.6% - 0s H 0 0 33.0000000 40.80262 23.6% - 0s 0 0 40.35209 0 113 33.00000 40.35209 22.3% - 0s 0 0 40.11798 0 113 33.00000 40.11798 21.6% - 0s 0 0 39.98213 0 113 33.00000 39.98213 21.2% - 0s 0 0 39.89174 0 113 33.00000 39.89174 20.9% - 0s 0 0 39.75058 0 111 33.00000 39.75058 20.5% - 0s 0 0 39.70410 0 112 33.00000 39.70410 20.3% - 0s 0 0 39.61978 0 111 33.00000 39.61978 20.1% - 0s 0 0 39.47884 0 112 33.00000 39.47884 19.6% - 0s 0 0 39.39589 0 111 33.00000 39.39589 19.4% - 0s 0 0 39.36100 0 112 33.00000 39.36100 19.3% - 0s 0 0 39.35178 0 113 33.00000 39.35178 19.2% - 0s 0 0 39.35178 0 111 33.00000 39.35178 19.2% - 0s 0 2 39.35129 0 111 33.00000 39.35129 19.2% - 0s H 55 30 34.0000000 38.87346 14.3% 41.8 0s * 230 45 9 35.0000000 37.30375 6.58% 34.3 0s Cutting planes: Clique: 2 Zero half: 50 Explored 326 nodes (10979 simplex iterations) in 0.44 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%