Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:15:03 2012 Optimize a model with 774 rows, 175 columns and 1548 nonzeros Presolve removed 185 rows and 0 columns Presolve time: 0.01s Presolved: 589 rows, 175 columns, 1302 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 6.860345e+01, 349 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 68.60345 0 165 50.00000 68.60345 37.2% - 0s H 0 0 53.0000000 68.60345 29.4% - 0s 0 0 67.66840 0 170 53.00000 67.66840 27.7% - 0s 0 0 67.12672 0 172 53.00000 67.12672 26.7% - 0s 0 0 66.39213 0 172 53.00000 66.39213 25.3% - 0s 0 0 66.13933 0 174 53.00000 66.13933 24.8% - 0s 0 0 65.85495 0 173 53.00000 65.85495 24.3% - 0s 0 0 65.58040 0 173 53.00000 65.58040 23.7% - 0s H 0 0 54.0000000 65.58040 21.4% - 0s 0 0 65.52718 0 174 54.00000 65.52718 21.3% - 0s H 0 0 55.0000000 65.52718 19.1% - 0s 0 0 65.36609 0 174 55.00000 65.36609 18.8% - 0s 0 0 65.23679 0 173 55.00000 65.23679 18.6% - 0s 0 0 65.16585 0 174 55.00000 65.16585 18.5% - 0s 0 0 65.13606 0 175 55.00000 65.13606 18.4% - 0s 0 0 65.13606 0 174 55.00000 65.13606 18.4% - 0s 0 2 65.13130 0 174 55.00000 65.13130 18.4% - 0s H 40 25 57.0000000 64.69418 13.5% 49.6 0s 612 238 61.01481 12 172 57.00000 62.75591 10.1% 42.9 5s 623 246 61.35986 8 173 57.00000 62.75591 10.1% 42.1 10s 1599 450 58.60000 32 123 57.00000 61.50463 7.90% 49.1 15s * 2727 503 27 58.0000000 60.66667 4.60% 44.4 18s Cutting planes: Gomory: 1 Zero half: 182 Explored 3654 nodes (151441 simplex iterations) in 19.78 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%