Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:08:20 2012 Optimize a model with 353 rows, 261 columns and 1141 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 353 rows, 259 columns, 1139 nonzeros Variable types: 0 continuous, 259 integer (258 binary) Found heuristic solution: objective 76.0000000 Root relaxation: objective 0.000000e+00, 127 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 82 76.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s 0 0 0.55954 0 83 63.00000 0.55954 99.1% - 0s H 0 0 60.0000000 0.55954 99.1% - 0s 0 0 1.00000 0 85 60.00000 1.00000 98.3% - 0s 0 0 1.00000 0 85 60.00000 1.00000 98.3% - 0s 0 0 1.00000 0 82 60.00000 1.00000 98.3% - 0s H 0 0 58.0000000 1.00000 98.3% - 0s H 0 0 56.0000000 1.00000 98.2% - 0s 0 2 1.00000 0 82 56.00000 1.00000 98.2% - 0s * 49 42 30 39.0000000 4.03894 89.6% 26.7 0s * 85 64 24 37.0000000 4.53782 87.7% 26.5 0s * 113 74 16 34.0000000 6.02323 82.3% 27.0 0s H 573 239 31.0000000 11.00000 64.5% 27.5 0s * 649 202 15 28.0000000 13.41176 52.1% 27.5 0s * 889 185 10 27.0000000 15.44000 42.8% 27.9 0s Cutting planes: Gomory: 3 Explored 1690 nodes (46408 simplex iterations) in 1.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%