Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:54:38 2012 Optimize a model with 948 rows, 192 columns and 1896 nonzeros Presolve removed 235 rows and 0 columns Presolve time: 0.01s Presolved: 713 rows, 192 columns, 1587 nonzeros Variable types: 0 continuous, 192 integer (192 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.412500e+01, 392 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 74.12500 0 153 52.00000 74.12500 42.5% - 0s 0 0 73.53846 0 188 52.00000 73.53846 41.4% - 0s H 0 0 55.0000000 73.53846 33.7% - 0s 0 0 72.80988 0 189 55.00000 72.80988 32.4% - 0s 0 0 71.94075 0 189 55.00000 71.94075 30.8% - 0s 0 0 71.55241 0 188 55.00000 71.55241 30.1% - 0s 0 0 70.96864 0 189 55.00000 70.96864 29.0% - 0s 0 0 70.85282 0 191 55.00000 70.85282 28.8% - 0s 0 0 70.73579 0 189 55.00000 70.73579 28.6% - 0s 0 0 70.70820 0 190 55.00000 70.70820 28.6% - 0s 0 0 70.66204 0 189 55.00000 70.66204 28.5% - 0s 0 0 70.63948 0 190 55.00000 70.63948 28.4% - 0s 0 0 70.56395 0 188 55.00000 70.56395 28.3% - 0s 0 0 70.46928 0 190 55.00000 70.46928 28.1% - 0s 0 0 70.28122 0 192 55.00000 70.28122 27.8% - 0s 0 0 70.26889 0 192 55.00000 70.26889 27.8% - 0s 0 0 70.26889 0 192 55.00000 70.26889 27.8% - 0s 0 2 70.26800 0 192 55.00000 70.26800 27.8% - 0s * 17 17 12 58.0000000 69.97786 20.7% 71.3 0s * 55 37 15 59.0000000 69.79003 18.3% 80.2 0s H 358 142 60.0000000 68.23740 13.7% 53.6 1s 609 259 64.57143 8 189 60.00000 67.55086 12.6% 53.2 5s 2052 779 61.50000 28 116 60.00000 66.65625 11.1% 49.0 10s 4751 1959 63.80488 23 140 60.00000 65.46154 9.10% 40.6 15s 7951 2985 63.25000 37 127 60.00000 64.72222 7.87% 36.5 20s 12573 3901 62.00000 42 110 60.00000 64.00000 6.67% 33.3 25s 16327 4385 cutoff 30 60.00000 63.66162 6.10% 31.8 30s 22084 4634 cutoff 42 60.00000 63.16667 5.28% 30.0 35s 28231 4284 62.33333 33 121 60.00000 62.72500 4.54% 28.6 40s 33873 3336 cutoff 34 60.00000 62.25926 3.77% 27.6 45s 41282 147 cutoff 36 60.00000 61.00000 1.67% 26.2 50s Cutting planes: Gomory: 4 Clique: 2 Zero half: 74 Explored 41467 nodes (1087798 simplex iterations) in 50.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%