current bounds on the number of colors: 0 -- 105 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:56:43 2012 Optimize a model with 27665 rows, 5990 columns and 88140 nonzeros Presolve time: 0.14s Presolved: 27665 rows, 5990 columns, 88140 nonzeros Variable types: 0 continuous, 5990 integer (5990 binary) Root relaxation: objective 0.000000e+00, 364 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 (624 simplex iterations) in 0.20 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 19:56:43 2012 Optimize a model with 13885 rows, 3260 columns and 44070 nonzeros Presolve time: 0.06s Presolved: 13885 rows, 3260 columns, 44070 nonzeros Variable types: 0 continuous, 3260 integer (3260 binary) Root relaxation: objective 0.000000e+00, 257 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 (471 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:56:44 2012 Optimize a model with 6995 rows, 1895 columns and 22035 nonzeros Presolve time: 0.02s Presolved: 6995 rows, 1895 columns, 22035 nonzeros Variable types: 0 continuous, 1895 integer (1895 binary) Root relaxation: objective 0.000000e+00, 214 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 (417 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 19:56:44 2012 Optimize a model with 3285 rows, 1160 columns and 10170 nonzeros Presolve time: 0.01s Presolved: 3285 rows, 1160 columns, 10170 nonzeros Variable types: 0 continuous, 1160 integer (1160 binary) Root relaxation: objective 0.000000e+00, 224 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 20 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1545 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:56:44 2012 Optimize a model with 1695 rows, 845 columns and 5085 nonzeros Presolve time: 0.00s Presolved: 1695 rows, 845 columns, 5085 nonzeros Variable types: 0 continuous, 845 integer (845 binary) Root relaxation: objective 0.000000e+00, 230 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 0 210 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2760 simplex iterations) in 0.24 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 19:56:44 2012 Optimize a model with 2225 rows, 950 columns and 6780 nonzeros Presolve time: 0.01s Presolved: 2225 rows, 950 columns, 6780 nonzeros Variable types: 0 continuous, 950 integer (950 binary) Root relaxation: objective 0.000000e+00, 238 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 0 186 - 0.00000 - - 0s 0 0 0.00000 0 271 - 0.00000 - - 0s 0 0 0.00000 0 263 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 1s 0 0 0.00000 0 178 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 0 0.00000 0 265 - 0.00000 - - 2s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 0 0.00000 0 256 - 0.00000 - - 3s 0 0 0.00000 0 246 - 0.00000 - - 3s 0 0 0.00000 0 262 - 0.00000 - - 3s 0 0 0.00000 0 262 - 0.00000 - - 4s 0 2 0.00000 0 262 - 0.00000 - - 4s Cutting planes: Clique: 8 Zero half: 12 Explored 17 nodes (34307 simplex iterations) in 4.45 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 19:56:49 2012 Optimize a model with 2755 rows, 1055 columns and 8475 nonzeros Presolve time: 0.01s Presolved: 2755 rows, 1055 columns, 8475 nonzeros Variable types: 0 continuous, 1055 integer (1055 binary) Root relaxation: objective 0.000000e+00, 235 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 0 106 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1488 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% optimal solution found: number of colors: 5