Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:37:52 2012 Optimize a model with 411 rows, 266 columns and 1291 nonzeros Presolve time: 0.00s Presolved: 411 rows, 266 columns, 1291 nonzeros Variable types: 0 continuous, 266 integer (266 binary) Found heuristic solution: objective 86.0000000 Root relaxation: objective 0.000000e+00, 105 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 61 86.00000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s 0 0 0.54450 0 62 83.00000 0.54450 99.3% - 0s H 0 0 75.0000000 0.54450 99.3% - 0s 0 0 1.08278 0 63 75.00000 1.08278 98.6% - 0s 0 0 1.31695 0 64 75.00000 1.31695 98.2% - 0s 0 0 1.36518 0 65 75.00000 1.36518 98.2% - 0s 0 2 1.36875 0 65 75.00000 1.36875 98.2% - 0s * 38 38 20 64.0000000 4.96984 92.2% 38.4 0s * 44 37 22 63.0000000 4.96984 92.1% 35.0 0s * 206 164 23 61.0000000 11.94233 80.4% 33.9 0s * 212 160 24 60.0000000 11.94233 80.1% 33.1 0s * 378 300 23 57.0000000 12.34202 78.3% 34.2 0s H 599 393 56.0000000 15.45028 72.4% 31.8 0s 3809 1166 cutoff 26 56.00000 30.28571 45.9% 28.7 5s * 7083 1826 32 55.0000000 34.52941 37.2% 27.6 8s 8392 1994 52.06977 25 137 55.00000 35.77273 35.0% 27.4 10s * 9979 2093 25 54.0000000 37.42857 30.7% 27.1 11s 13824 2140 cutoff 25 54.00000 39.40000 27.0% 26.8 15s *16769 1954 28 53.0000000 40.93548 22.8% 26.6 17s 19952 1633 45.42857 22 129 53.00000 42.50000 19.8% 26.3 20s Cutting planes: Gomory: 4 Explored 26566 nodes (681138 simplex iterations) in 24.93 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%