Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:17:16 2012 Optimize a model with 397 rows, 257 columns and 1247 nonzeros Presolve time: 0.00s Presolved: 397 rows, 257 columns, 1247 nonzeros Variable types: 0 continuous, 257 integer (257 binary) Found heuristic solution: objective 93.0000000 Root relaxation: objective 0.000000e+00, 91 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 59 93.00000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.50847 0 60 72.00000 0.50847 99.3% - 0s 0 0 1.06915 0 66 72.00000 1.06915 98.5% - 0s 0 0 1.09578 0 65 72.00000 1.09578 98.5% - 0s 0 2 1.09791 0 65 72.00000 1.09791 98.5% - 0s H 32 32 68.0000000 6.64000 90.2% 39.0 0s * 40 38 23 58.0000000 6.64000 88.6% 34.9 0s * 78 66 22 57.0000000 7.90258 86.1% 31.2 0s * 593 438 24 55.0000000 13.50000 75.5% 31.5 0s * 1050 566 36 54.0000000 14.62166 72.9% 30.6 1s 4071 1222 49.02222 25 119 54.00000 26.80000 50.4% 28.3 5s * 7513 1934 29 53.0000000 31.00000 41.5% 28.3 8s 8704 2120 cutoff 26 53.00000 31.64286 40.3% 28.2 10s 14086 2767 cutoff 26 53.00000 34.35294 35.2% 28.1 15s 19919 3182 40.65217 23 110 53.00000 37.00000 30.2% 27.9 20s 26106 3279 cutoff 28 53.00000 38.63636 27.1% 27.7 25s *32084 2985 28 52.0000000 40.16667 22.8% 27.5 29s 32169 2979 51.00000 26 122 52.00000 40.18919 22.7% 27.5 30s 38087 2347 48.50000 24 111 52.00000 41.60000 20.0% 27.4 35s 44613 1328 cutoff 26 52.00000 43.81818 15.7% 27.2 40s Cutting planes: Gomory: 2 Zero half: 4 Explored 47350 nodes (1279916 simplex iterations) in 41.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%