Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:26:31 2012 Optimize a model with 309 rows, 228 columns and 998 nonzeros Presolve time: 0.00s Presolved: 309 rows, 228 columns, 998 nonzeros Variable types: 0 continuous, 228 integer (228 binary) Found heuristic solution: objective 68.0000000 Root relaxation: objective 0.000000e+00, 111 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 74 68.00000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s H 0 0 57.0000000 0.00000 100% - 0s 0 0 0.56410 0 77 57.00000 0.56410 99.0% - 0s 0 0 0.67391 0 77 57.00000 0.67391 98.8% - 0s 0 0 0.71308 0 77 57.00000 0.71308 98.7% - 0s H 0 0 52.0000000 0.71308 98.6% - 0s 0 0 0.71489 0 79 52.00000 0.71489 98.6% - 0s 0 0 0.71489 0 79 52.00000 0.71489 98.6% - 0s H 0 0 48.0000000 0.71489 98.5% - 0s 0 2 0.72505 0 79 48.00000 0.72505 98.5% - 0s * 32 32 18 34.0000000 4.77881 85.9% 26.1 0s * 102 73 20 33.0000000 6.46377 80.4% 21.5 0s * 184 116 18 30.0000000 9.25047 69.2% 20.8 0s * 246 125 21 29.0000000 10.00976 65.5% 20.0 0s * 347 143 15 27.0000000 10.94737 59.5% 19.6 0s * 738 161 14 26.0000000 15.22222 41.5% 20.1 0s Cutting planes: Gomory: 1 Zero half: 4 Explored 1725 nodes (33274 simplex iterations) in 1.26 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%