Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:03:26 2012 Optimize a model with 905 rows, 127 columns and 1810 nonzeros Presolve removed 381 rows and 0 columns Presolve time: 0.01s Presolved: 524 rows, 127 columns, 1399 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 4.065057e+01, 329 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.65057 0 126 24.00000 40.65057 69.4% - 0s H 0 0 25.0000000 40.65057 62.6% - 0s 0 0 40.36756 0 126 25.00000 40.36756 61.5% - 0s 0 0 40.23485 0 125 25.00000 40.23485 60.9% - 0s 0 0 40.01780 0 125 25.00000 40.01780 60.1% - 0s H 0 0 26.0000000 40.01780 53.9% - 0s 0 0 39.90459 0 126 26.00000 39.90459 53.5% - 0s H 0 0 28.0000000 39.90459 42.5% - 0s 0 0 39.82665 0 125 28.00000 39.82665 42.2% - 0s 0 0 39.75855 0 125 28.00000 39.75855 42.0% - 0s 0 0 39.70623 0 125 28.00000 39.70623 41.8% - 0s 0 0 39.66670 0 125 28.00000 39.66670 41.7% - 0s 0 0 39.64990 0 126 28.00000 39.64990 41.6% - 0s 0 0 39.61005 0 126 28.00000 39.61005 41.5% - 0s H 0 0 29.0000000 39.61005 36.6% - 0s 0 0 39.52073 0 124 29.00000 39.52073 36.3% - 0s 0 0 39.42887 0 127 29.00000 39.42887 36.0% - 0s 0 0 39.36027 0 127 29.00000 39.36027 35.7% - 0s 0 0 39.34626 0 127 29.00000 39.34626 35.7% - 0s 0 0 39.34596 0 127 29.00000 39.34596 35.7% - 0s 0 0 39.29988 0 126 29.00000 39.29988 35.5% - 0s 0 0 39.24332 0 126 29.00000 39.24332 35.3% - 0s 0 0 39.18665 0 127 29.00000 39.18665 35.1% - 0s 0 0 39.10893 0 127 29.00000 39.10893 34.9% - 0s 0 0 39.07480 0 127 29.00000 39.07480 34.7% - 0s 0 0 39.01049 0 126 29.00000 39.01049 34.5% - 0s 0 0 38.99169 0 125 29.00000 38.99169 34.5% - 0s 0 0 38.95370 0 127 29.00000 38.95370 34.3% - 0s 0 0 38.92628 0 125 29.00000 38.92628 34.2% - 0s 0 0 38.89778 0 126 29.00000 38.89778 34.1% - 0s 0 0 38.85378 0 126 29.00000 38.85378 34.0% - 0s 0 2 38.85195 0 126 29.00000 38.85195 34.0% - 0s H 261 99 30.0000000 36.96363 23.2% 37.0 0s 614 240 33.25000 10 127 30.00000 36.24870 20.8% 34.6 5s 635 256 36.24870 19 105 30.00000 36.24870 20.8% 38.5 10s H 1044 314 31.0000000 36.24870 16.9% 42.3 10s 3820 80 32.33333 35 73 31.00000 32.50000 4.84% 31.4 15s Cutting planes: Gomory: 2 Clique: 4 Zero half: 55 Explored 3929 nodes (122773 simplex iterations) in 15.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%