current bounds on the number of colors: 0 -- 204 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 11:02:08 2012 Optimize a model with 108630 rows, 21871 columns and 346086 nonzeros Presolve time: 0.36s Presolved: 108630 rows, 21871 columns, 346086 nonzeros Variable types: 0 continuous, 21871 integer (21871 binary) Root relaxation: objective 0.000000e+00, 818 iterations, 0.13 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 (1300 simplex iterations) in 0.65 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 -- 102 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 11:02:10 2012 Optimize a model with 54417 rows, 11467 columns and 173043 nonzeros Presolve time: 0.16s Presolved: 54417 rows, 11467 columns, 173043 nonzeros Variable types: 0 continuous, 11467 integer (11467 binary) Root relaxation: objective 0.000000e+00, 676 iterations, 0.06 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 (1157 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 -- 51 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 11:02:11 2012 Optimize a model with 26779 rows, 6163 columns and 84825 nonzeros Presolve time: 0.11s Presolved: 26779 rows, 6163 columns, 84825 nonzeros Variable types: 0 continuous, 6163 integer (6163 binary) Root relaxation: objective 0.000000e+00, 457 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 (880 simplex iterations) in 0.16 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 11:02:12 2012 Optimize a model with 12960 rows, 3511 columns and 40716 nonzeros Presolve time: 0.04s Presolved: 12960 rows, 3511 columns, 40716 nonzeros Variable types: 0 continuous, 3511 integer (3511 binary) Root relaxation: objective 0.000000e+00, 431 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 (859 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 11:02:12 2012 Optimize a model with 6582 rows, 2287 columns and 20358 nonzeros Presolve time: 0.02s Presolved: 6582 rows, 2287 columns, 20358 nonzeros Variable types: 0 continuous, 2287 integer (2287 binary) Root relaxation: objective 0.000000e+00, 446 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 (2583 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 11:02:12 2012 Optimize a model with 3393 rows, 1675 columns and 10179 nonzeros Presolve time: 0.01s Presolved: 3393 rows, 1675 columns, 10179 nonzeros Variable types: 0 continuous, 1675 integer (1675 binary) Root relaxation: objective 0.000000e+00, 492 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 0 402 - 0.00000 - - 0s 0 0 0.00000 0 406 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (6088 simplex iterations) in 0.74 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 11:02:13 2012 Optimize a model with 4456 rows, 1879 columns and 13572 nonzeros Presolve time: 0.01s Presolved: 4456 rows, 1879 columns, 13572 nonzeros Variable types: 0 continuous, 1879 integer (1879 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 0 394 - 0.00000 - - 0s 0 0 0.00000 0 390 - 0.00000 - - 0s 0 0 0.00000 0 376 - 0.00000 - - 1s 0 0 0.00000 0 450 - 0.00000 - - 1s 0 0 0.00000 0 378 - 0.00000 - - 2s 0 0 0.00000 0 374 - 0.00000 - - 2s 0 0 0.00000 0 380 - 0.00000 - - 3s 0 0 0.00000 0 391 - 0.00000 - - 4s 0 0 0.00000 0 376 - 0.00000 - - 4s 0 0 0.00000 0 366 - 0.00000 - - 5s 0 0 0.00000 0 368 - 0.00000 - - 6s 0 0 0.00000 0 360 - 0.00000 - - 7s 0 0 0.00000 0 364 - 0.00000 - - 7s 0 0 0.00000 0 352 - 0.00000 - - 8s 0 2 0.00000 0 352 - 0.00000 - - 8s 46 24 0.00000 14 394 - 0.00000 - 280 10s 509 56 0.00000 14 388 - 0.00000 - 154 15s 605 72 0.00000 11 366 - 0.00000 - 156 21s 607 73 0.00000 10 386 - 0.00000 - 155 25s 609 74 0.00000 8 350 - 0.00000 - 155 30s 612 76 0.00000 10 526 - 0.00000 - 154 36s 614 78 0.00000 8 502 - 0.00000 - 154 43s 616 79 0.00000 10 490 - 0.00000 - 153 45s 714 62 0.00000 21 475 - 0.00000 - 267 50s 844 17 infeasible 21 - 0.00000 - 283 55s Cutting planes: Gomory: 1 Clique: 2 Zero half: 13 Explored 963 nodes (336513 simplex iterations) in 59.30 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 11:03:12 2012 Optimize a model with 5519 rows, 2083 columns and 16965 nonzeros Presolve time: 0.02s Presolved: 5519 rows, 2083 columns, 16965 nonzeros Variable types: 0 continuous, 2083 integer (2083 binary) Root relaxation: objective 0.000000e+00, 434 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 0 378 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 360 - 0.00000 - - 1s 0 0 0.00000 0 367 - 0.00000 - - 1s 0 0 0.00000 0 356 - 0.00000 - - 1s H 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Zero half: 17 Explored 0 nodes (13039 simplex iterations) in 1.47 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