Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:57:09 2012 Optimize a model with 724 rows, 168 columns and 1448 nonzeros Presolve removed 150 rows and 0 columns Presolve time: 0.00s Presolved: 574 rows, 168 columns, 1243 nonzeros Variable types: 0 continuous, 168 integer (168 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.800000e+01, 305 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 68.00000 0 124 45.00000 68.00000 51.1% - 0s H 0 0 49.0000000 68.00000 38.8% - 0s 0 0 66.96000 0 162 49.00000 66.96000 36.7% - 0s 0 0 65.63071 0 166 49.00000 65.63071 33.9% - 0s 0 0 64.88571 0 164 49.00000 64.88571 32.4% - 0s H 0 0 50.0000000 64.88571 29.8% - 0s 0 0 64.52063 0 165 50.00000 64.52063 29.0% - 0s 0 0 64.27042 0 162 50.00000 64.27042 28.5% - 0s 0 0 63.99201 0 165 50.00000 63.99201 28.0% - 0s 0 0 63.82819 0 165 50.00000 63.82819 27.7% - 0s 0 0 63.74067 0 166 50.00000 63.74067 27.5% - 0s H 0 0 51.0000000 63.74067 25.0% - 0s 0 0 63.62856 0 166 51.00000 63.62856 24.8% - 0s 0 0 63.45043 0 167 51.00000 63.45043 24.4% - 0s 0 0 63.40642 0 167 51.00000 63.40642 24.3% - 0s 0 0 63.40642 0 166 51.00000 63.40642 24.3% - 0s 0 2 63.40619 0 166 51.00000 63.40619 24.3% - 0s H 41 31 52.0000000 63.21540 21.6% 44.6 0s * 44 34 19 53.0000000 63.21540 19.3% 42.7 0s H 165 85 54.0000000 62.23412 15.2% 43.0 0s * 211 77 9 55.0000000 62.10300 12.9% 41.5 0s * 315 96 9 56.0000000 61.73744 10.2% 42.6 0s 726 235 60.70508 11 150 56.00000 60.70508 8.40% 48.2 5s Cutting planes: Gomory: 2 Zero half: 78 Explored 3786 nodes (123659 simplex iterations) in 9.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%