Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:25:18 2012 Optimize a model with 291 rows, 218 columns and 943 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 291 rows, 217 columns, 942 nonzeros Variable types: 0 continuous, 217 integer (216 binary) Found heuristic solution: objective 70.0000000 Root relaxation: objective 0.000000e+00, 124 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 71 70.00000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s 0 0 0.62076 0 72 46.00000 0.62076 98.7% - 0s H 0 0 44.0000000 0.62076 98.6% - 0s 0 0 1.04209 0 75 44.00000 1.04209 97.6% - 0s H 0 0 43.0000000 1.04209 97.6% - 0s 0 0 1.04209 0 74 43.00000 1.04209 97.6% - 0s 0 0 1.04209 0 74 43.00000 1.04209 97.6% - 0s H 0 0 41.0000000 1.04209 97.5% - 0s H 0 0 39.0000000 1.04209 97.3% - 0s 0 2 1.04255 0 74 39.00000 1.04255 97.3% - 0s H 27 27 33.0000000 3.44400 89.6% 32.4 0s * 121 81 21 32.0000000 5.72797 82.1% 27.4 0s * 169 117 20 31.0000000 5.75520 81.4% 29.0 0s * 172 107 19 30.0000000 5.75520 80.8% 28.7 0s * 250 164 14 28.0000000 9.05882 67.6% 28.8 0s * 590 255 15 27.0000000 12.87500 52.3% 25.6 0s * 622 238 15 25.0000000 13.00000 48.0% 25.0 0s Explored 1674 nodes (39554 simplex iterations) in 1.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%