Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:57:18 2012 Optimize a model with 701 rows, 168 columns and 1402 nonzeros Presolve removed 151 rows and 0 columns Presolve time: 0.00s Presolved: 550 rows, 168 columns, 1201 nonzeros Variable types: 0 continuous, 168 integer (168 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.825917e+01, 366 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 68.25917 0 164 47.00000 68.25917 45.2% - 0s 0 0 66.94545 0 165 47.00000 66.94545 42.4% - 0s H 0 0 52.0000000 66.94545 28.7% - 0s 0 0 66.08212 0 165 52.00000 66.08212 27.1% - 0s 0 0 65.47992 0 165 52.00000 65.47992 25.9% - 0s H 0 0 55.0000000 65.47992 19.1% - 0s 0 0 65.21164 0 167 55.00000 65.21164 18.6% - 0s 0 0 64.90453 0 167 55.00000 64.90453 18.0% - 0s 0 0 64.74967 0 166 55.00000 64.74967 17.7% - 0s 0 0 64.64510 0 167 55.00000 64.64510 17.5% - 0s 0 0 64.49809 0 167 55.00000 64.49809 17.3% - 0s 0 0 64.35960 0 168 55.00000 64.35960 17.0% - 0s 0 0 64.19738 0 167 55.00000 64.19738 16.7% - 0s 0 0 64.04483 0 167 55.00000 64.04483 16.4% - 0s 0 0 63.94691 0 167 55.00000 63.94691 16.3% - 0s 0 0 63.87524 0 167 55.00000 63.87524 16.1% - 0s 0 0 63.82330 0 167 55.00000 63.82330 16.0% - 0s 0 0 63.76342 0 167 55.00000 63.76342 15.9% - 0s 0 0 63.75195 0 167 55.00000 63.75195 15.9% - 0s 0 0 63.75195 0 167 55.00000 63.75195 15.9% - 0s 0 2 63.75088 0 167 55.00000 63.75088 15.9% - 0s * 237 88 24 56.0000000 62.23970 11.1% 44.8 0s H 436 129 57.0000000 61.43347 7.78% 44.1 0s 1156 197 58.26250 23 132 57.00000 60.60811 6.33% 46.2 5s Cutting planes: Gomory: 4 Zero half: 77 Explored 2393 nodes (92315 simplex iterations) in 7.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%