current bounds on the number of colors: 0 -- 193 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 06:20:06 2012 Optimize a model with 88033 rows, 19443 columns and 282048 nonzeros Presolve time: 0.28s Presolved: 88033 rows, 19443 columns, 282048 nonzeros Variable types: 0 continuous, 19443 integer (19443 binary) Root relaxation: objective 0.000000e+00, 750 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 (1194 simplex iterations) in 0.51 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 -- 96 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 06:20:08 2012 Optimize a model with 44113 rows, 10179 columns and 141024 nonzeros Presolve time: 0.15s Presolved: 44113 rows, 10179 columns, 141024 nonzeros Variable types: 0 continuous, 10179 integer (10179 binary) Root relaxation: objective 0.000000e+00, 666 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 (1103 simplex iterations) in 0.26 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 -- 48 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 06:20:08 2012 Optimize a model with 22153 rows, 5547 columns and 70512 nonzeros Presolve time: 0.09s Presolved: 22153 rows, 5547 columns, 70512 nonzeros Variable types: 0 continuous, 5547 integer (5547 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 (808 simplex iterations) in 0.13 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 -- 24 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 06:20:09 2012 Optimize a model with 11173 rows, 3231 columns and 35256 nonzeros Presolve time: 0.03s Presolved: 11173 rows, 3231 columns, 35256 nonzeros Variable types: 0 continuous, 3231 integer (3231 binary) Root relaxation: objective 0.000000e+00, 408 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 (778 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 -- 12 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 06:20:09 2012 Optimize a model with 5683 rows, 2073 columns and 17628 nonzeros Presolve time: 0.02s Presolved: 5683 rows, 2073 columns, 17628 nonzeros Variable types: 0 continuous, 2073 integer (2073 binary) Root relaxation: objective 0.000000e+00, 442 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 (1628 simplex iterations) in 0.08 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 06:20:09 2012 Optimize a model with 2938 rows, 1494 columns and 8814 nonzeros Presolve time: 0.01s Presolved: 2938 rows, 1494 columns, 8814 nonzeros Variable types: 0 continuous, 1494 integer (1494 binary) Root relaxation: objective 0.000000e+00, 451 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 0 312 - 0.00000 - - 0s 0 0 0.00000 0 380 - 0.00000 - - 0s 0 0 0.00000 0 500 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 44 Zero half: 1016 Explored 0 nodes (10684 simplex iterations) in 1.45 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 06:20:11 2012 Optimize a model with 3853 rows, 1687 columns and 11752 nonzeros Presolve time: 0.01s Presolved: 3853 rows, 1687 columns, 11752 nonzeros Variable types: 0 continuous, 1687 integer (1687 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 0 370 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 360 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 1s 0 0 0.00000 0 360 - 0.00000 - - 1s 0 0 0.00000 0 366 - 0.00000 - - 2s 0 0 0.00000 0 358 - 0.00000 - - 2s 0 0 0.00000 0 342 - 0.00000 - - 2s 0 0 0.00000 0 340 - 0.00000 - - 3s 0 0 0.00000 0 338 - 0.00000 - - 3s 0 0 0.00000 0 332 - 0.00000 - - 4s 0 0 0.00000 0 334 - 0.00000 - - 4s 0 0 0.00000 0 328 - 0.00000 - - 5s 0 0 0.00000 0 326 - 0.00000 - - 5s 0 0 0.00000 0 322 - 0.00000 - - 5s 0 0 0.00000 0 324 - 0.00000 - - 6s 0 0 0.00000 0 324 - 0.00000 - - 6s 0 2 0.00000 0 324 - 0.00000 - - 6s 517 25 0.00000 21 330 - 0.00000 - 116 10s 607 34 0.00000 20 440 - 0.00000 - 116 17s 610 36 0.00000 19 405 - 0.00000 - 115 20s 613 38 0.00000 11 351 - 0.00000 - 115 25s 823 80 infeasible 33 - 0.00000 - 195 30s 1111 82 infeasible 31 - 0.00000 - 207 35s 1410 57 infeasible 28 - 0.00000 - 216 40s 1715 50 infeasible 30 - 0.00000 - 219 45s 1991 52 infeasible 31 - 0.00000 - 223 50s 2260 59 infeasible 33 - 0.00000 - 227 55s 2525 58 0.00000 31 346 - 0.00000 - 229 60s 2780 63 0.00000 28 413 - 0.00000 - 232 65s 3046 55 infeasible 29 - 0.00000 - 234 70s 3291 52 0.00000 27 404 - 0.00000 - 237 75s 3569 56 0.00000 28 333 - 0.00000 - 237 80s 3852 55 0.00000 23 402 - 0.00000 - 237 85s 4114 73 0.00000 24 306 - 0.00000 - 239 90s 4369 60 infeasible 27 - 0.00000 - 240 95s 4608 65 infeasible 27 - 0.00000 - 241 100s 4851 66 infeasible 29 - 0.00000 - 244 105s 5124 77 infeasible 31 - 0.00000 - 244 110s 5394 71 0.00000 25 348 - 0.00000 - 244 115s 5669 65 0.00000 33 428 - 0.00000 - 244 120s 5932 48 0.00000 31 431 - 0.00000 - 244 125s 6204 54 infeasible 29 - 0.00000 - 244 130s 6480 44 0.00000 25 388 - 0.00000 - 244 135s 6724 40 infeasible 25 - 0.00000 - 245 140s 6996 40 infeasible 24 - 0.00000 - 246 145s 7295 39 infeasible 29 - 0.00000 - 245 150s 7513 27 infeasible 31 - 0.00000 - 246 155s 7732 14 0.00000 22 366 - 0.00000 - 248 160s 7960 6 0.00000 27 447 - 0.00000 - 249 165s Cutting planes: Zero half: 13 Explored 8009 nodes (2049927 simplex iterations) in 166.24 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 06:22:57 2012 Optimize a model with 4768 rows, 1880 columns and 14690 nonzeros Presolve time: 0.01s Presolved: 4768 rows, 1880 columns, 14690 nonzeros Variable types: 0 continuous, 1880 integer (1880 binary) Root relaxation: objective 0.000000e+00, 436 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 0 189 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4522 simplex iterations) in 0.36 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