current bounds on the number of colors: 0 -- 169 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:48 2012 Optimize a model with 63001 rows, 14944 columns and 202692 nonzeros Presolve time: 0.19s Presolved: 63001 rows, 14944 columns, 202692 nonzeros Variable types: 0 continuous, 14944 integer (14944 binary) Root relaxation: objective 0.000000e+00, 656 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 0.35 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:50 2012 Optimize a model with 31585 rows, 7846 columns and 101346 nonzeros Presolve time: 0.14s Presolved: 31585 rows, 7846 columns, 101346 nonzeros Variable types: 0 continuous, 7846 integer (7846 binary) Root relaxation: objective 0.000000e+00, 567 iterations, 0.04 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 (984 simplex iterations) in 0.23 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:45:50 2012 Optimize a model with 15877 rows, 4297 columns and 50673 nonzeros Presolve time: 0.06s Presolved: 15877 rows, 4297 columns, 50673 nonzeros Variable types: 0 continuous, 4297 integer (4297 binary) Root relaxation: objective 0.000000e+00, 382 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 (857 simplex iterations) in 0.11 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 20:45:51 2012 Optimize a model with 7649 rows, 2438 columns and 24130 nonzeros Presolve time: 0.02s Presolved: 7649 rows, 2438 columns, 24130 nonzeros Variable types: 0 continuous, 2438 integer (2438 binary) Root relaxation: objective 0.000000e+00, 357 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 (682 simplex iterations) in 0.04 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 20:45:51 2012 Optimize a model with 3909 rows, 1593 columns and 12065 nonzeros Presolve time: 0.01s Presolved: 3909 rows, 1593 columns, 12065 nonzeros Variable types: 0 continuous, 1593 integer (1593 binary) Root relaxation: objective 0.000000e+00, 361 iterations, 0.00 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 (1499 simplex iterations) in 0.06 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 20:45:51 2012 Optimize a model with 1665 rows, 1086 columns and 4826 nonzeros Presolve removed 169 rows and 169 columns Presolve time: 0.00s Presolved: 1496 rows, 917 columns, 4488 nonzeros Variable types: 0 continuous, 917 integer (917 binary) Root relaxation: objective 0.000000e+00, 180 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 0 169 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (739 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 20:45:51 2012 Optimize a model with 2413 rows, 1255 columns and 7239 nonzeros Presolve time: 0.01s Presolved: 2413 rows, 1255 columns, 7239 nonzeros Variable types: 0 continuous, 1255 integer (1255 binary) Root relaxation: objective 0.000000e+00, 402 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 0 334 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 438 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 28 Zero half: 824 Explored 0 nodes (6952 simplex iterations) in 0.81 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 20:45:52 2012 Optimize a model with 3161 rows, 1424 columns and 9652 nonzeros Presolve time: 0.01s Presolved: 3161 rows, 1424 columns, 9652 nonzeros Variable types: 0 continuous, 1424 integer (1424 binary) Root relaxation: objective 0.000000e+00, 401 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 0 328 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 447 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 303 - 0.00000 - - 1s 0 0 0.00000 0 300 - 0.00000 - - 2s 0 0 0.00000 0 300 - 0.00000 - - 2s 0 0 0.00000 0 290 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 288 - 0.00000 - - 3s 0 0 0.00000 0 288 - 0.00000 - - 3s 0 2 0.00000 0 288 - 0.00000 - - 3s 281 30 infeasible 17 - 0.00000 - 100 5s 615 57 0.00000 15 295 - 0.00000 - 89.1 10s 621 61 0.00000 15 236 - 0.00000 - 88.3 15s 626 65 0.00000 23 233 - 0.00000 - 87.6 20s 802 36 0.00000 20 329 - 0.00000 - 171 25s 1174 40 0.00000 21 282 - 0.00000 - 180 30s 1676 50 0.00000 26 320 - 0.00000 - 177 35s 2106 34 infeasible 24 - 0.00000 - 180 40s 2517 33 0.00000 24 358 - 0.00000 - 183 45s 2954 24 infeasible 29 - 0.00000 - 183 50s Cutting planes: Zero half: 12 Explored 3279 nodes (637641 simplex iterations) in 53.96 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