Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:47:48 2012 Optimize a model with 563 rows, 503 columns and 1908 nonzeros Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 563 rows, 476 columns, 1881 nonzeros Variable types: 0 continuous, 476 integer (475 binary) Found heuristic solution: objective 81.0000000 Root relaxation: objective 0.000000e+00, 261 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 0 181 81.00000 0.00000 100% - 0s 0 0 0.27775 0 183 81.00000 0.27775 100% - 0s 0 0 0.71395 0 187 81.00000 0.71395 99.1% - 0s H 0 0 78.0000000 0.71395 99.1% - 0s 0 0 0.71395 0 190 78.00000 0.71395 99.1% - 0s 0 0 0.71395 0 188 78.00000 0.71395 99.1% - 0s H 0 0 69.0000000 0.71395 99.0% - 0s H 0 0 63.0000000 0.71395 98.9% - 0s H 0 0 60.0000000 0.71395 98.8% - 0s H 0 0 57.0000000 0.71395 98.7% - 0s H 0 0 56.0000000 0.71395 98.7% - 0s 0 2 0.71484 0 188 56.00000 0.71484 98.7% - 0s H 27 27 52.0000000 1.00000 98.1% 38.1 0s H 81 81 34.0000000 1.00000 97.1% 26.0 0s * 86 70 55 32.0000000 1.00000 96.9% 26.6 0s * 135 92 32 30.0000000 1.00000 96.7% 28.6 0s * 168 108 20 29.0000000 1.00000 96.6% 30.9 0s H 384 196 27.0000000 1.00000 96.3% 34.5 0s H 1647 526 26.0000000 10.61702 59.2% 31.3 2s 2764 873 16.00000 21 194 26.00000 13.79032 47.0% 28.4 5s 5985 1433 23.68085 31 186 26.00000 17.12000 34.2% 25.3 10s 9484 1678 20.07843 24 192 26.00000 19.00000 26.9% 24.2 15s 13503 1616 cutoff 26 26.00000 20.36842 21.7% 23.2 20s 17632 1161 24.05036 28 188 26.00000 21.65957 16.7% 22.2 25s Explored 21002 nodes (452018 simplex iterations) in 28.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%