current bounds on the number of colors: 0 -- 202 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:55:15 2012 Optimize a model with 105242 rows, 21442 columns and 335522 nonzeros Presolve time: 0.35s Presolved: 105242 rows, 21442 columns, 335522 nonzeros Variable types: 0 continuous, 21442 integer (21442 binary) Root relaxation: objective 0.000000e+00, 912 iterations, 0.12 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 (1376 simplex iterations) in 0.62 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 -- 101 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:55:17 2012 Optimize a model with 52202 rows, 11140 columns and 166100 nonzeros Presolve time: 0.17s Presolved: 52202 rows, 11140 columns, 166100 nonzeros Variable types: 0 continuous, 11140 integer (11140 binary) Root relaxation: objective 0.000000e+00, 687 iterations, 0.05 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 (1162 simplex iterations) in 0.30 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 -- 50 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:55:18 2012 Optimize a model with 26202 rows, 6090 columns and 83050 nonzeros Presolve time: 0.11s Presolved: 26202 rows, 6090 columns, 83050 nonzeros Variable types: 0 continuous, 6090 integer (6090 binary) Root relaxation: objective 0.000000e+00, 530 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 (1014 simplex iterations) in 0.17 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 -- 25 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:55:19 2012 Optimize a model with 12682 rows, 3464 columns and 39864 nonzeros Presolve time: 0.04s Presolved: 12682 rows, 3464 columns, 39864 nonzeros Variable types: 0 continuous, 3464 integer (3464 binary) Root relaxation: objective 0.000000e+00, 417 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 (802 simplex iterations) in 0.07 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 -- 12 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:55:19 2012 Optimize a model with 6442 rows, 2252 columns and 19932 nonzeros Presolve time: 0.02s Presolved: 6442 rows, 2252 columns, 19932 nonzeros Variable types: 0 continuous, 2252 integer (2252 binary) Root relaxation: objective 0.000000e+00, 435 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 (1728 simplex iterations) in 0.09 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:55:19 2012 Optimize a model with 3322 rows, 1646 columns and 9966 nonzeros Presolve time: 0.01s Presolved: 3322 rows, 1646 columns, 9966 nonzeros Variable types: 0 continuous, 1646 integer (1646 binary) Root relaxation: objective 0.000000e+00, 461 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 0 398 - 0.00000 - - 0s 0 0 0.00000 0 402 - 0.00000 - - 0s 0 0 0.00000 0 551 - 0.00000 - - 1s 0 0 0.00000 0 568 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Zero half: 1376 Explored 0 nodes (9523 simplex iterations) in 1.82 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:55:21 2012 Optimize a model with 4362 rows, 1848 columns and 13288 nonzeros Presolve time: 0.01s Presolved: 4362 rows, 1848 columns, 13288 nonzeros Variable types: 0 continuous, 1848 integer (1848 binary) Root relaxation: objective 0.000000e+00, 458 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 0 390 - 0.00000 - - 0s 0 0 0.00000 0 394 - 0.00000 - - 0s 0 0 0.00000 0 390 - 0.00000 - - 1s 0 0 0.00000 0 428 - 0.00000 - - 1s 0 0 0.00000 0 368 - 0.00000 - - 2s 0 0 0.00000 0 366 - 0.00000 - - 2s 0 0 0.00000 0 366 - 0.00000 - - 3s 0 0 0.00000 0 360 - 0.00000 - - 3s 0 0 0.00000 0 354 - 0.00000 - - 4s 0 0 0.00000 0 360 - 0.00000 - - 5s 0 0 0.00000 0 350 - 0.00000 - - 5s 0 0 0.00000 0 342 - 0.00000 - - 6s 0 0 0.00000 0 338 - 0.00000 - - 7s 0 0 0.00000 0 333 - 0.00000 - - 7s 0 0 0.00000 0 342 - 0.00000 - - 8s 0 0 0.00000 0 340 - 0.00000 - - 8s 0 2 0.00000 0 335 - 0.00000 - - 9s 8 8 0.00000 6 486 - 0.00000 - 533 10s 478 50 0.00000 18 366 - 0.00000 - 136 15s 705 87 0.00000 20 388 - 0.00000 - 135 21s 708 89 0.00000 20 378 - 0.00000 - 135 26s 710 90 0.00000 7 374 - 0.00000 - 134 30s 713 92 0.00000 23 378 - 0.00000 - 134 36s 715 93 0.00000 20 350 - 0.00000 - 133 41s 717 95 0.00000 22 344 - 0.00000 - 133 45s 812 96 0.00000 21 368 - 0.00000 - 252 50s 1023 71 infeasible 23 - 0.00000 - 254 55s 1208 72 0.00000 21 364 - 0.00000 - 259 60s 1390 72 0.00000 24 356 - 0.00000 - 264 65s 1566 82 infeasible 27 - 0.00000 - 266 70s 1746 76 0.00000 28 372 - 0.00000 - 270 75s 1930 88 0.00000 26 358 - 0.00000 - 273 80s 2144 84 0.00000 29 405 - 0.00000 - 272 85s 2347 97 infeasible 25 - 0.00000 - 273 90s 2545 93 0.00000 26 422 - 0.00000 - 274 95s 2759 79 infeasible 22 - 0.00000 - 274 100s 2931 67 0.00000 27 417 - 0.00000 - 276 105s 3100 48 infeasible 27 - 0.00000 - 278 110s 3275 25 infeasible 25 - 0.00000 - 279 115s 3442 6 0.00000 23 397 - 0.00000 - 280 120s Cutting planes: Gomory: 1 Zero half: 23 Explored 3457 nodes (1035805 simplex iterations) in 120.55 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 09:57:22 2012 Optimize a model with 5402 rows, 2050 columns and 16610 nonzeros Presolve time: 0.02s Presolved: 5402 rows, 2050 columns, 16610 nonzeros Variable types: 0 continuous, 2050 integer (2050 binary) Root relaxation: objective 0.000000e+00, 424 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 0 364 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (8914 simplex iterations) in 1.00 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% optimal solution found: number of colors: 5