Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:45:47 2012 Optimize a model with 650 rows, 162 columns and 1300 nonzeros Presolve removed 123 rows and 0 columns Presolve time: 0.00s Presolved: 527 rows, 162 columns, 1131 nonzeros Variable types: 0 continuous, 162 integer (162 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.600000e+01, 312 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.00000 0 122 45.00000 66.00000 46.7% - 0s H 0 0 49.0000000 66.00000 34.7% - 0s 0 0 65.48571 0 157 49.00000 65.48571 33.6% - 0s 0 0 64.53852 0 157 49.00000 64.53852 31.7% - 0s 0 0 63.76000 0 157 49.00000 63.76000 30.1% - 0s 0 0 63.07874 0 158 49.00000 63.07874 28.7% - 0s 0 0 62.77900 0 160 49.00000 62.77900 28.1% - 0s 0 0 62.60168 0 158 49.00000 62.60168 27.8% - 0s 0 0 62.53321 0 160 49.00000 62.53321 27.6% - 0s 0 0 62.46127 0 161 49.00000 62.46127 27.5% - 0s 0 0 62.37450 0 161 49.00000 62.37450 27.3% - 0s 0 0 62.31059 0 160 49.00000 62.31059 27.2% - 0s 0 0 62.28147 0 160 49.00000 62.28147 27.1% - 0s 0 0 62.28147 0 160 49.00000 62.28147 27.1% - 0s 0 2 62.28118 0 160 49.00000 62.28118 27.1% - 0s H 23 23 50.0000000 62.28099 24.6% 43.7 0s * 52 42 17 51.0000000 62.06968 21.7% 38.2 0s * 83 53 20 52.0000000 62.06929 19.4% 38.8 0s H 444 233 53.0000000 60.37746 13.9% 35.1 0s 614 322 57.50000 13 158 53.00000 60.03510 13.3% 34.2 5s 633 334 57.00000 11 158 53.00000 60.03510 13.3% 33.2 10s 2619 988 54.00000 32 108 53.00000 58.08114 9.59% 36.3 15s 6353 1952 55.50000 28 95 53.00000 56.71569 7.01% 29.4 20s 10287 2354 cutoff 41 53.00000 56.00000 5.66% 26.4 25s 13096 2437 54.33333 38 100 53.00000 55.65517 5.01% 25.0 30s *17569 529 29 54.0000000 55.00000 1.85% 23.4 34s 17583 515 55.00000 35 72 54.00000 55.00000 1.85% 23.3 35s Cutting planes: Zero half: 265 Explored 18202 nodes (418968 simplex iterations) in 35.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%