Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:14:17 2012 Optimize a model with 779 rows, 175 columns and 1558 nonzeros Presolve removed 176 rows and 0 columns Presolve time: 0.00s Presolved: 603 rows, 175 columns, 1325 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 7.044444e+01, 390 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.44444 0 170 50.00000 70.44444 40.9% - 0s H 0 0 54.0000000 70.44444 30.5% - 0s 0 0 69.41867 0 173 54.00000 69.41867 28.6% - 0s H 0 0 56.0000000 69.41867 24.0% - 0s H 0 0 57.0000000 69.41867 21.8% - 0s 0 0 68.73160 0 174 57.00000 68.73160 20.6% - 0s 0 0 68.31874 0 173 57.00000 68.31874 19.9% - 0s H 0 0 58.0000000 68.31874 17.8% - 0s 0 0 67.98672 0 174 58.00000 67.98672 17.2% - 0s 0 0 67.75313 0 174 58.00000 67.75313 16.8% - 0s 0 0 67.56502 0 175 58.00000 67.56502 16.5% - 0s 0 0 67.30104 0 174 58.00000 67.30104 16.0% - 0s 0 0 67.20002 0 175 58.00000 67.20002 15.9% - 0s 0 0 67.07223 0 175 58.00000 67.07223 15.6% - 0s 0 0 66.95770 0 175 58.00000 66.95770 15.4% - 0s 0 0 66.88093 0 174 58.00000 66.88093 15.3% - 0s 0 0 66.83845 0 175 58.00000 66.83845 15.2% - 0s 0 0 66.70681 0 175 58.00000 66.70681 15.0% - 0s 0 0 66.65094 0 175 58.00000 66.65094 14.9% - 0s 0 0 66.63881 0 175 58.00000 66.63881 14.9% - 0s 0 0 66.63881 0 175 58.00000 66.63881 14.9% - 0s 0 2 66.63747 0 175 58.00000 66.63747 14.9% - 0s H 250 78 59.0000000 64.94404 10.1% 43.6 0s H 419 100 60.0000000 64.21629 7.03% 43.9 0s 610 133 63.30000 5 173 60.00000 63.83752 6.40% 42.7 5s Cutting planes: Gomory: 2 Zero half: 70 Explored 1821 nodes (76880 simplex iterations) in 7.80 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%