current bounds on the number of colors: 0 -- 174 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:48 2012 Optimize a model with 68730 rows, 15926 columns and 220806 nonzeros Presolve time: 0.21s Presolved: 68730 rows, 15926 columns, 220806 nonzeros Variable types: 0 continuous, 15926 integer (15926 binary) Root relaxation: objective 0.000000e+00, 658 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1060 simplex iterations) in 0.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 87 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:50 2012 Optimize a model with 34058 rows, 8270 columns and 109134 nonzeros Presolve time: 0.15s Presolved: 34058 rows, 8270 columns, 109134 nonzeros Variable types: 0 continuous, 8270 integer (8270 binary) Root relaxation: objective 0.000000e+00, 492 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (853 simplex iterations) in 0.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:50 2012 Optimize a model with 16722 rows, 4442 columns and 53298 nonzeros Presolve time: 0.06s Presolved: 16722 rows, 4442 columns, 53298 nonzeros Variable types: 0 continuous, 4442 integer (4442 binary) Root relaxation: objective 0.000000e+00, 374 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (687 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:50 2012 Optimize a model with 8054 rows, 2528 columns and 25380 nonzeros Presolve time: 0.02s Presolved: 8054 rows, 2528 columns, 25380 nonzeros Variable types: 0 continuous, 2528 integer (2528 binary) Root relaxation: objective 0.000000e+00, 384 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (724 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:51 2012 Optimize a model with 4114 rows, 1658 columns and 12690 nonzeros Presolve time: 0.01s Presolved: 4114 rows, 1658 columns, 12690 nonzeros Variable types: 0 continuous, 1658 integer (1658 binary) Root relaxation: objective 0.000000e+00, 379 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 94 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3691 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:51 2012 Optimize a model with 1750 rows, 1136 columns and 5076 nonzeros Presolve removed 174 rows and 174 columns Presolve time: 0.00s Presolved: 1576 rows, 962 columns, 4728 nonzeros Variable types: 0 continuous, 962 integer (962 binary) Root relaxation: objective 0.000000e+00, 179 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 0 174 - 0.00000 - - 0s Explored 0 nodes (751 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:51 2012 Optimize a model with 2538 rows, 1310 columns and 7614 nonzeros Presolve time: 0.01s Presolved: 2538 rows, 1310 columns, 7614 nonzeros Variable types: 0 continuous, 1310 integer (1310 binary) Root relaxation: objective 0.000000e+00, 387 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 0s 0 0 0.00000 0 460 - 0.00000 - - 0s 0 0 0.00000 0 466 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Zero half: 992 Explored 0 nodes (6855 simplex iterations) in 1.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:17:52 2012 Optimize a model with 3326 rows, 1484 columns and 10152 nonzeros Presolve time: 0.01s Presolved: 3326 rows, 1484 columns, 10152 nonzeros Variable types: 0 continuous, 1484 integer (1484 binary) Root relaxation: objective 0.000000e+00, 387 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 395 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 1s 0 0 0.00000 0 352 - 0.00000 - - 1s 0 0 0.00000 0 317 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 2s 0 0 0.00000 0 290 - 0.00000 - - 2s 0 0 0.00000 0 266 - 0.00000 - - 2s 0 0 0.00000 0 238 - 0.00000 - - 3s 0 0 0.00000 0 244 - 0.00000 - - 3s 0 0 0.00000 0 246 - 0.00000 - - 3s 0 0 0.00000 0 246 - 0.00000 - - 4s 0 2 0.00000 0 246 - 0.00000 - - 4s 91 31 0.00000 15 284 - 0.00000 - 120 5s 711 67 0.00000 17 300 - 0.00000 - 85.6 10s 719 73 infeasible 11 - 0.00000 - 128 15s 1023 21 0.00000 17 294 - 0.00000 - 154 20s 1321 3 0.00000 19 310 - 0.00000 - 177 25s Cutting planes: Gomory: 1 Zero half: 14 Explored 1329 nodes (273364 simplex iterations) in 25.07 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5