current bounds on the number of colors: 0 -- 185 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:15:32 2012 Optimize a model with 81881 rows, 17908 columns and 262108 nonzeros Presolve time: 0.26s Presolved: 81881 rows, 17908 columns, 262108 nonzeros Variable types: 0 continuous, 17908 integer (17908 binary) Root relaxation: objective 0.000000e+00, 765 iterations, 0.08 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 (1215 simplex iterations) in 0.46 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 -- 92 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:15:33 2012 Optimize a model with 41033 rows, 9398 columns and 131054 nonzeros Presolve time: 0.16s Presolved: 41033 rows, 9398 columns, 131054 nonzeros Variable types: 0 continuous, 9398 integer (9398 binary) Root relaxation: objective 0.000000e+00, 659 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 (1082 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 -- 46 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:15:34 2012 Optimize a model with 20609 rows, 5143 columns and 65527 nonzeros Presolve time: 0.08s Presolved: 20609 rows, 5143 columns, 65527 nonzeros Variable types: 0 continuous, 5143 integer (5143 binary) Root relaxation: objective 0.000000e+00, 445 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 (796 simplex iterations) in 0.12 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 -- 23 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:15:34 2012 Optimize a model with 9953 rows, 2923 columns and 31339 nonzeros Presolve time: 0.03s Presolved: 9953 rows, 2923 columns, 31339 nonzeros Variable types: 0 continuous, 2923 integer (2923 binary) Root relaxation: objective 0.000000e+00, 390 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 (726 simplex iterations) in 0.05 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 03:15:34 2012 Optimize a model with 4625 rows, 1813 columns and 14245 nonzeros Presolve time: 0.01s Presolved: 4625 rows, 1813 columns, 14245 nonzeros Variable types: 0 continuous, 1813 integer (1813 binary) Root relaxation: objective 0.000000e+00, 406 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 0 170 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4385 simplex iterations) in 0.33 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 03:15:35 2012 Optimize a model with 1961 rows, 1258 columns and 5698 nonzeros Presolve removed 185 rows and 185 columns Presolve time: 0.00s Presolved: 1776 rows, 1073 columns, 5328 nonzeros Variable types: 0 continuous, 1073 integer (1073 binary) Root relaxation: objective 0.000000e+00, 191 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 0 185 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (807 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 03:15:35 2012 Optimize a model with 2849 rows, 1443 columns and 8547 nonzeros Presolve time: 0.01s Presolved: 2849 rows, 1443 columns, 8547 nonzeros Variable types: 0 continuous, 1443 integer (1443 binary) Root relaxation: objective 0.000000e+00, 413 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 0 368 - 0.00000 - - 0s 0 0 0.00000 0 370 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4859 simplex iterations) in 0.62 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 03:15:35 2012 Optimize a model with 3737 rows, 1628 columns and 11396 nonzeros Presolve time: 0.01s Presolved: 3737 rows, 1628 columns, 11396 nonzeros Variable types: 0 continuous, 1628 integer (1628 binary) Root relaxation: objective 0.000000e+00, 412 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 0 352 - 0.00000 - - 0s 0 0 0.00000 0 360 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 323 - 0.00000 - - 1s 0 0 0.00000 0 322 - 0.00000 - - 1s 0 0 0.00000 0 306 - 0.00000 - - 2s 0 0 0.00000 0 300 - 0.00000 - - 2s 0 0 0.00000 0 304 - 0.00000 - - 3s 0 0 0.00000 0 296 - 0.00000 - - 3s 0 0 0.00000 0 321 - 0.00000 - - 4s 0 0 0.00000 0 322 - 0.00000 - - 4s 0 0 0.00000 0 300 - 0.00000 - - 5s 0 0 0.00000 0 319 - 0.00000 - - 6s 0 0 0.00000 0 319 - 0.00000 - - 6s 0 2 0.00000 0 319 - 0.00000 - - 6s 422 51 0.00000 19 308 - 0.00000 - 128 10s 805 65 0.00000 14 324 - 0.00000 - 126 15s 809 67 0.00000 12 324 - 0.00000 - 126 21s 812 69 0.00000 14 280 - 0.00000 - 125 25s 817 73 infeasible 13 - 0.00000 - 193 30s 909 68 infeasible 27 - 0.00000 - 196 35s 1179 19 infeasible 24 - 0.00000 - 207 40s 1479 17 0.00000 23 328 - 0.00000 - 211 45s 1770 14 infeasible 23 - 0.00000 - 214 50s Cutting planes: Zero half: 17 Explored 1943 nodes (472565 simplex iterations) in 53.13 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