Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:56:54 2012 Optimize a model with 451 rows, 321 columns and 1446 nonzeros Presolve time: 0.00s Presolved: 451 rows, 321 columns, 1446 nonzeros Variable types: 0 continuous, 321 integer (321 binary) Found heuristic solution: objective 95.0000000 Root relaxation: objective 0.000000e+00, 125 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 95 95.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s 0 0 0.39247 0 97 77.00000 0.39247 99.5% - 0s H 0 0 75.0000000 0.39247 99.5% - 0s 0 0 1.04058 0 98 75.00000 1.04058 98.6% - 0s 0 0 1.06083 0 99 75.00000 1.06083 98.6% - 0s 0 0 1.12011 0 102 75.00000 1.12011 98.5% - 0s 0 0 1.15317 0 99 75.00000 1.15317 98.5% - 0s 0 0 1.16910 0 102 75.00000 1.16910 98.4% - 0s H 0 0 68.0000000 1.16910 98.3% - 0s H 0 0 65.0000000 1.16910 98.2% - 0s 0 2 1.19007 0 102 65.00000 1.19007 98.2% - 0s * 48 48 29 57.0000000 3.68959 93.5% 36.2 0s * 54 45 35 56.0000000 3.68959 93.4% 32.4 0s * 103 79 30 54.0000000 3.69053 93.2% 34.2 0s * 146 108 26 52.0000000 6.60937 87.3% 33.1 0s * 224 171 24 51.0000000 6.63077 87.0% 32.3 0s * 355 273 22 49.0000000 8.54929 82.6% 34.1 0s * 2388 752 33 48.0000000 24.54902 48.9% 27.1 3s H 2458 747 47.0000000 24.59184 47.7% 27.0 3s 3833 1041 42.42466 25 148 47.00000 28.15385 40.1% 25.8 5s 9030 1734 45.71429 28 137 47.00000 33.05882 29.7% 23.8 10s 14955 2000 42.38710 26 133 47.00000 36.00000 23.4% 22.8 15s 21840 1871 40.55844 25 149 47.00000 38.11765 18.9% 22.0 20s *27058 1431 34 46.0000000 39.15278 14.9% 21.7 23s 28233 1272 43.07407 26 161 46.00000 39.48780 14.2% 21.6 25s Explored 32860 nodes (698230 simplex iterations) in 28.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%