Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:32:11 2012 Optimize a model with 849 rows, 180 columns and 1698 nonzeros Presolve removed 194 rows and 0 columns Presolve time: 0.01s Presolved: 655 rows, 180 columns, 1439 nonzeros Variable types: 0 continuous, 180 integer (180 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.081250e+01, 411 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.81250 0 170 52.00000 70.81250 36.2% - 0s 0 0 69.78241 0 178 52.00000 69.78241 34.2% - 0s H 0 0 54.0000000 69.78241 29.2% - 0s 0 0 69.12179 0 180 54.00000 69.12179 28.0% - 0s 0 0 68.01681 0 178 54.00000 68.01681 26.0% - 0s 0 0 67.77857 0 180 54.00000 67.77857 25.5% - 0s 0 0 67.53331 0 179 54.00000 67.53331 25.1% - 0s 0 0 67.40345 0 179 54.00000 67.40345 24.8% - 0s H 0 0 56.0000000 67.40345 20.4% - 0s 0 0 67.35613 0 179 56.00000 67.35613 20.3% - 0s 0 0 67.32768 0 178 56.00000 67.32768 20.2% - 0s 0 0 67.20086 0 178 56.00000 67.20086 20.0% - 0s H 0 0 57.0000000 67.20086 17.9% - 0s 0 0 67.18064 0 179 57.00000 67.18064 17.9% - 0s 0 0 67.18064 0 179 57.00000 67.18064 17.9% - 0s 0 2 67.17825 0 179 57.00000 67.17825 17.9% - 0s 618 272 64.41921 11 177 57.00000 64.41921 13.0% 50.1 5s 2578 981 58.60606 26 130 57.00000 62.56970 9.77% 43.1 10s * 3753 1135 32 58.0000000 62.00000 6.90% 39.3 12s 5759 1077 cutoff 22 58.00000 60.72727 4.70% 36.4 15s Cutting planes: Gomory: 7 Zero half: 62 Mod-K: 3 Explored 7806 nodes (261391 simplex iterations) in 17.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%