Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:56:55 2012 Optimize a model with 281 rows, 164 columns and 864 nonzeros Presolve time: 0.00s Presolved: 281 rows, 164 columns, 864 nonzeros Variable types: 0 continuous, 164 integer (164 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 0.000000e+00, 50 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 24 74.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s 0 0 0.80000 0 26 65.00000 0.80000 98.8% - 0s 0 0 0.86941 0 36 65.00000 0.86941 98.7% - 0s 0 0 0.95000 0 26 65.00000 0.95000 98.5% - 0s 0 0 1.00894 0 38 65.00000 1.00894 98.4% - 0s 0 0 1.03942 0 46 65.00000 1.03942 98.4% - 0s 0 0 1.05000 0 27 65.00000 1.05000 98.4% - 0s 0 0 1.05000 0 26 65.00000 1.05000 98.4% - 0s 0 0 1.10000 0 26 65.00000 1.10000 98.3% - 0s 0 0 1.10000 0 26 65.00000 1.10000 98.3% - 0s 0 0 1.10000 0 26 65.00000 1.10000 98.3% - 0s 0 2 1.49166 0 26 65.00000 1.49166 97.7% - 0s * 25 20 13 64.0000000 6.40323 90.0% 37.4 0s * 78 50 13 63.0000000 14.45556 77.1% 29.8 0s * 197 109 15 61.0000000 21.88889 64.1% 26.0 0s * 208 111 17 60.0000000 21.88889 63.5% 24.9 0s * 211 107 15 59.0000000 21.88889 62.9% 24.5 0s H 276 120 56.0000000 27.00000 51.8% 24.0 0s * 518 174 16 54.0000000 31.30000 42.0% 22.2 0s * 1008 146 26 53.0000000 33.29412 37.2% 23.6 0s Explored 2755 nodes (56725 simplex iterations) in 1.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%