Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:46:48 2012 Optimize a model with 575 rows, 526 columns and 1961 nonzeros Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 575 rows, 500 columns, 1935 nonzeros Variable types: 0 continuous, 500 integer (499 binary) Found heuristic solution: objective 104.0000000 Root relaxation: objective 0.000000e+00, 297 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 0 210 104.00000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s 0 0 0.43333 0 211 61.00000 0.43333 99.3% - 0s H 0 0 50.0000000 0.43333 99.1% - 0s 0 0 0.71836 0 212 50.00000 0.71836 98.6% - 0s H 0 0 40.0000000 0.71836 98.2% - 0s 0 0 1.03612 0 213 40.00000 1.03612 97.4% - 0s H 0 0 38.0000000 1.03612 97.3% - 0s 0 0 1.03612 0 213 38.00000 1.03612 97.3% - 0s 0 2 1.03612 0 213 38.00000 1.03612 97.3% - 0s H 54 54 35.0000000 1.03653 97.0% 28.6 0s H 81 57 26.0000000 1.03653 96.0% 26.3 0s * 273 182 40 24.0000000 1.32323 94.5% 25.2 0s * 697 393 35 23.0000000 3.51485 84.7% 32.0 2s 2280 483 18.80000 21 228 23.00000 15.24837 33.7% 25.7 5s 6185 568 20.41317 23 207 23.00000 18.46000 19.7% 20.8 10s * 8214 152 34 22.0000000 20.05310 8.85% 20.2 12s Cutting planes: Gomory: 7 Zero half: 1 Explored 8421 nodes (169429 simplex iterations) in 12.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%