current bounds on the number of colors: 0 -- 104 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:55:17 2012 Optimize a model with 28392 rows, 5952 columns and 90272 nonzeros Presolve time: 0.14s Presolved: 28392 rows, 5952 columns, 90272 nonzeros Variable types: 0 continuous, 5952 integer (5952 binary) Root relaxation: objective 0.000000e+00, 287 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 (497 simplex iterations) in 0.19 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 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:55:18 2012 Optimize a model with 14248 rows, 3248 columns and 45136 nonzeros Presolve time: 0.06s Presolved: 14248 rows, 3248 columns, 45136 nonzeros Variable types: 0 continuous, 3248 integer (3248 binary) Root relaxation: objective 0.000000e+00, 223 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 (421 simplex iterations) in 0.09 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:55:18 2012 Optimize a model with 7176 rows, 1896 columns and 22568 nonzeros Presolve time: 0.02s Presolved: 7176 rows, 1896 columns, 22568 nonzeros Variable types: 0 continuous, 1896 integer (1896 binary) Root relaxation: objective 0.000000e+00, 219 iterations, 0.00 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 (405 simplex iterations) in 0.04 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:55:18 2012 Optimize a model with 3368 rows, 1168 columns and 10416 nonzeros Presolve time: 0.01s Presolved: 3368 rows, 1168 columns, 10416 nonzeros Variable types: 0 continuous, 1168 integer (1168 binary) Root relaxation: objective 0.000000e+00, 232 iterations, 0.00 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 (798 simplex iterations) in 0.03 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 Thu Dec 13 19:55:18 2012 Optimize a model with 1736 rows, 856 columns and 5208 nonzeros Presolve time: 0.00s Presolved: 1736 rows, 856 columns, 5208 nonzeros Variable types: 0 continuous, 856 integer (856 binary) Root relaxation: objective 0.000000e+00, 236 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 0 172 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3135 simplex iterations) in 0.27 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 Thu Dec 13 19:55:19 2012 Optimize a model with 2280 rows, 960 columns and 6944 nonzeros Presolve time: 0.01s Presolved: 2280 rows, 960 columns, 6944 nonzeros Variable types: 0 continuous, 960 integer (960 binary) Root relaxation: objective 0.000000e+00, 236 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 0 202 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 288 - 0.00000 - - 1s 0 0 0.00000 0 277 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 2s 0 0 0.00000 0 269 - 0.00000 - - 2s 0 0 0.00000 0 277 - 0.00000 - - 2s 0 0 0.00000 0 267 - 0.00000 - - 3s 0 0 0.00000 0 290 - 0.00000 - - 3s 0 0 0.00000 0 287 - 0.00000 - - 3s 0 2 0.00000 0 287 - 0.00000 - - 3s Cutting planes: Clique: 14 Zero half: 23 Explored 25 nodes (32413 simplex iterations) in 4.03 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 Thu Dec 13 19:55:23 2012 Optimize a model with 2824 rows, 1064 columns and 8680 nonzeros Presolve time: 0.01s Presolved: 2824 rows, 1064 columns, 8680 nonzeros Variable types: 0 continuous, 1064 integer (1064 binary) Root relaxation: objective 0.000000e+00, 228 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 68 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2274 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% optimal solution found: number of colors: 5