current bounds on the number of colors: 0 -- 207 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 12:23:09 2012 Optimize a model with 111447 rows, 22401 columns and 355041 nonzeros Presolve time: 0.37s Presolved: 111447 rows, 22401 columns, 355041 nonzeros Variable types: 0 continuous, 22401 integer (22401 binary) Root relaxation: objective 0.000000e+00, 775 iterations, 0.09 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 (1226 simplex iterations) in 0.64 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 -- 103 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 12:23:10 2012 Optimize a model with 55287 rows, 11637 columns and 175797 nonzeros Presolve time: 0.17s Presolved: 55287 rows, 11637 columns, 175797 nonzeros Variable types: 0 continuous, 11637 integer (11637 binary) Root relaxation: objective 0.000000e+00, 734 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 (1202 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 12:23:11 2012 Optimize a model with 27207 rows, 6255 columns and 86175 nonzeros Presolve time: 0.11s Presolved: 27207 rows, 6255 columns, 86175 nonzeros Variable types: 0 continuous, 6255 integer (6255 binary) Root relaxation: objective 0.000000e+00, 466 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 (862 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 12:23:12 2012 Optimize a model with 13167 rows, 3564 columns and 41364 nonzeros Presolve time: 0.04s Presolved: 13167 rows, 3564 columns, 41364 nonzeros Variable types: 0 continuous, 3564 integer (3564 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 (807 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 12:23:12 2012 Optimize a model with 6687 rows, 2322 columns and 20682 nonzeros Presolve time: 0.02s Presolved: 6687 rows, 2322 columns, 20682 nonzeros Variable types: 0 continuous, 2322 integer (2322 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 (1793 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 12:23:12 2012 Optimize a model with 3447 rows, 1701 columns and 10341 nonzeros Presolve time: 0.01s Presolved: 3447 rows, 1701 columns, 10341 nonzeros Variable types: 0 continuous, 1701 integer (1701 binary) Root relaxation: objective 0.000000e+00, 469 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 0 412 - 0.00000 - - 0s 0 0 0.00000 0 414 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5874 simplex iterations) in 0.91 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 12:23:13 2012 Optimize a model with 4527 rows, 1908 columns and 13788 nonzeros Presolve time: 0.01s Presolved: 4527 rows, 1908 columns, 13788 nonzeros Variable types: 0 continuous, 1908 integer (1908 binary) Root relaxation: objective 0.000000e+00, 465 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 0 400 - 0.00000 - - 0s 0 0 0.00000 0 406 - 0.00000 - - 0s 0 0 0.00000 0 374 - 0.00000 - - 1s 0 0 0.00000 0 460 - 0.00000 - - 1s 0 0 0.00000 0 360 - 0.00000 - - 2s 0 0 0.00000 0 360 - 0.00000 - - 3s 0 0 0.00000 0 374 - 0.00000 - - 3s 0 0 0.00000 0 354 - 0.00000 - - 4s 0 0 0.00000 0 352 - 0.00000 - - 5s 0 0 0.00000 0 348 - 0.00000 - - 6s 0 0 0.00000 0 342 - 0.00000 - - 6s 0 0 0.00000 0 346 - 0.00000 - - 7s 0 0 0.00000 0 352 - 0.00000 - - 8s 0 0 0.00000 0 351 - 0.00000 - - 8s 0 2 0.00000 0 350 - 0.00000 - - 9s 9 9 0.00000 5 383 - 0.00000 - 486 10s 431 57 0.00000 18 348 - 0.00000 - 162 15s 605 73 0.00000 21 389 - 0.00000 - 153 23s 606 73 0.00000 21 338 - 0.00000 - 152 25s 608 75 0.00000 22 332 - 0.00000 - 152 30s 611 77 0.00000 10 324 - 0.00000 - 151 36s 613 78 0.00000 22 318 - 0.00000 - 151 41s 615 79 0.00000 14 322 - 0.00000 - 150 45s 645 85 infeasible 25 - 0.00000 - 267 50s 776 71 infeasible 24 - 0.00000 - 266 55s 940 48 0.00000 16 364 - 0.00000 - 271 60s 1115 57 infeasible 25 - 0.00000 - 274 65s 1280 50 infeasible 22 - 0.00000 - 277 70s 1428 46 0.00000 21 398 - 0.00000 - 284 75s 1600 32 0.00000 21 407 - 0.00000 - 286 80s 1738 18 0.00000 21 419 - 0.00000 - 291 85s 1888 18 infeasible 26 - 0.00000 - 294 90s 2044 10 0.00000 22 378 - 0.00000 - 297 95s Cutting planes: Clique: 1 Zero half: 10 Explored 2179 nodes (716627 simplex iterations) in 99.90 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 12:24:53 2012 Optimize a model with 5607 rows, 2115 columns and 17235 nonzeros Presolve time: 0.02s Presolved: 5607 rows, 2115 columns, 17235 nonzeros Variable types: 0 continuous, 2115 integer (2115 binary) Root relaxation: objective 0.000000e+00, 439 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 0 382 - 0.00000 - - 0s 0 0 0.00000 0 378 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (8448 simplex iterations) in 0.94 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