current bounds on the number of colors: 0 -- 180 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:02:56 2012 Optimize a model with 76590 rows, 17049 columns and 245430 nonzeros Presolve time: 0.24s Presolved: 76590 rows, 17049 columns, 245430 nonzeros Variable types: 0 continuous, 17049 integer (17049 binary) Root relaxation: objective 0.000000e+00, 649 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 (1030 simplex iterations) in 0.41 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 -- 90 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:02:58 2012 Optimize a model with 38385 rows, 8949 columns and 122715 nonzeros Presolve time: 0.15s Presolved: 38385 rows, 8949 columns, 122715 nonzeros Variable types: 0 continuous, 8949 integer (8949 binary) Root relaxation: objective 0.000000e+00, 477 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 (849 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:02:58 2012 Optimize a model with 18858 rows, 4809 columns and 59994 nonzeros Presolve time: 0.07s Presolved: 18858 rows, 4809 columns, 59994 nonzeros Variable types: 0 continuous, 4809 integer (4809 binary) Root relaxation: objective 0.000000e+00, 364 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 (690 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:02:59 2012 Optimize a model with 9519 rows, 2829 columns and 29997 nonzeros Presolve time: 0.03s Presolved: 9519 rows, 2829 columns, 29997 nonzeros Variable types: 0 continuous, 2829 integer (2829 binary) Root relaxation: objective 0.000000e+00, 395 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 (744 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:02:59 2012 Optimize a model with 4425 rows, 1749 columns and 13635 nonzeros Presolve time: 0.01s Presolved: 4425 rows, 1749 columns, 13635 nonzeros Variable types: 0 continuous, 1749 integer (1749 binary) Root relaxation: objective 0.000000e+00, 381 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 0 134 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2896 simplex iterations) in 0.14 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 Sat Dec 15 01:02:59 2012 Optimize a model with 1878 rows, 1209 columns and 5454 nonzeros Presolve removed 180 rows and 180 columns Presolve time: 0.00s Presolved: 1698 rows, 1029 columns, 5094 nonzeros Variable types: 0 continuous, 1029 integer (1029 binary) Root relaxation: objective 0.000000e+00, 189 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 0 180 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (755 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 Sat Dec 15 01:02:59 2012 Optimize a model with 2727 rows, 1389 columns and 8181 nonzeros Presolve time: 0.01s Presolved: 2727 rows, 1389 columns, 8181 nonzeros Variable types: 0 continuous, 1389 integer (1389 binary) Root relaxation: objective 0.000000e+00, 400 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 0 356 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 506 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 16 Zero half: 594 Explored 0 nodes (7072 simplex iterations) in 0.98 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 Sat Dec 15 01:03:00 2012 Optimize a model with 3576 rows, 1569 columns and 10908 nonzeros Presolve time: 0.01s Presolved: 3576 rows, 1569 columns, 10908 nonzeros Variable types: 0 continuous, 1569 integer (1569 binary) Root relaxation: objective 0.000000e+00, 394 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 0 338 - 0.00000 - - 0s 0 0 0.00000 0 348 - 0.00000 - - 0s 0 0 0.00000 0 350 - 0.00000 - - 0s 0 0 0.00000 0 477 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 0 0.00000 0 328 - 0.00000 - - 2s 0 0 0.00000 0 324 - 0.00000 - - 2s 0 0 0.00000 0 318 - 0.00000 - - 3s 0 0 0.00000 0 308 - 0.00000 - - 3s 0 0 0.00000 0 304 - 0.00000 - - 3s 0 0 0.00000 0 302 - 0.00000 - - 4s 0 0 0.00000 0 298 - 0.00000 - - 4s 0 0 0.00000 0 296 - 0.00000 - - 4s 0 0 0.00000 0 307 - 0.00000 - - 5s 0 0 0.00000 0 294 - 0.00000 - - 5s 0 0 0.00000 0 288 - 0.00000 - - 5s 0 0 0.00000 0 286 - 0.00000 - - 6s 0 0 0.00000 0 285 - 0.00000 - - 6s 0 0 0.00000 0 311 - 0.00000 - - 7s 0 0 0.00000 0 383 - 0.00000 - - 7s 0 0 0.00000 0 254 - 0.00000 - - 8s 0 2 0.00000 0 254 - 0.00000 - - 8s 255 17 0.00000 12 296 - 0.00000 - 116 10s 611 26 0.00000 15 453 - 0.00000 - 124 15s 618 30 infeasible 14 - 0.00000 - 163 20s 884 45 0.00000 29 284 - 0.00000 - 180 25s 1180 39 0.00000 28 302 - 0.00000 - 194 30s 1438 53 infeasible 25 - 0.00000 - 206 35s 1693 56 infeasible 29 - 0.00000 - 213 40s 1932 61 infeasible 28 - 0.00000 - 219 45s 2164 29 0.00000 16 397 - 0.00000 - 225 50s 2450 41 0.00000 21 312 - 0.00000 - 226 55s 2720 27 infeasible 25 - 0.00000 - 228 60s 2982 17 infeasible 25 - 0.00000 - 229 65s 3189 2 infeasible 28 - 0.00000 - 233 70s Cutting planes: Gomory: 4 Clique: 2 Zero half: 13 Explored 3200 nodes (818185 simplex iterations) in 70.27 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