Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:52:43 2012 Optimize a model with 531 rows, 488 columns and 1813 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 531 rows, 470 columns, 1795 nonzeros Variable types: 0 continuous, 470 integer (469 binary) Found heuristic solution: objective 97.0000000 Root relaxation: objective 0.000000e+00, 282 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 0 186 97.00000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s 0 0 0.38766 0 187 60.00000 0.38766 99.4% - 0s H 0 0 52.0000000 0.38766 99.3% - 0s 0 0 1.00000 0 188 52.00000 1.00000 98.1% - 0s H 0 0 45.0000000 1.00000 97.8% - 0s 0 0 1.01278 0 189 45.00000 1.01278 97.7% - 0s 0 0 1.16313 0 194 45.00000 1.16313 97.4% - 0s 0 0 1.16411 0 194 45.00000 1.16411 97.4% - 0s 0 0 1.16411 0 193 45.00000 1.16411 97.4% - 0s 0 2 1.16411 0 193 45.00000 1.16411 97.4% - 0s * 44 31 27 21.0000000 1.16770 94.4% 36.2 0s * 509 125 11 19.0000000 4.02034 78.8% 38.6 1s Cutting planes: Gomory: 5 Zero half: 1 Mod-K: 2 Explored 1190 nodes (41103 simplex iterations) in 1.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%