current bounds on the number of colors: 0 -- 114 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:13:36 2012 Optimize a model with 38076 rows, 7164 columns and 120384 nonzeros Presolve time: 0.15s Presolved: 38076 rows, 7164 columns, 120384 nonzeros Variable types: 0 continuous, 7164 integer (7164 binary) Root relaxation: objective 0.000000e+00, 287 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 (547 simplex iterations) in 0.24 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 -- 57 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:13:37 2012 Optimize a model with 18762 rows, 3858 columns and 59136 nonzeros Presolve time: 0.08s Presolved: 18762 rows, 3858 columns, 59136 nonzeros Variable types: 0 continuous, 3858 integer (3858 binary) Root relaxation: objective 0.000000e+00, 245 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 (526 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 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:13:38 2012 Optimize a model with 9438 rows, 2262 columns and 29568 nonzeros Presolve time: 0.03s Presolved: 9438 rows, 2262 columns, 29568 nonzeros Variable types: 0 continuous, 2262 integer (2262 binary) Root relaxation: objective 0.000000e+00, 236 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 (438 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:13:38 2012 Optimize a model with 4776 rows, 1464 columns and 14784 nonzeros Presolve time: 0.01s Presolved: 4776 rows, 1464 columns, 14784 nonzeros Variable types: 0 continuous, 1464 integer (1464 binary) Root relaxation: objective 0.000000e+00, 239 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 (842 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:13:38 2012 Optimize a model with 2112 rows, 1008 columns and 6336 nonzeros Presolve time: 0.01s Presolved: 2112 rows, 1008 columns, 6336 nonzeros Variable types: 0 continuous, 1008 integer (1008 binary) Root relaxation: objective 0.000000e+00, 241 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 0 178 - 0.00000 - - 0s 0 0 0.00000 0 271 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5178 simplex iterations) in 0.46 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:13:38 2012 Optimize a model with 3444 rows, 1236 columns and 10560 nonzeros Presolve time: 0.01s Presolved: 3444 rows, 1236 columns, 10560 nonzeros Variable types: 0 continuous, 1236 integer (1236 binary) Root relaxation: objective 0.000000e+00, 245 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 0 220 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 1s 0 0 0.00000 0 203 - 0.00000 - - 1s 0 0 0.00000 0 233 - 0.00000 - - 1s 0 0 0.00000 0 256 - 0.00000 - - 2s 0 0 0.00000 0 256 - 0.00000 - - 2s 0 2 0.00000 0 256 - 0.00000 - - 2s 660 19 0.00000 20 158 - 0.00000 - 69.8 5s 1705 42 0.00000 7 209 - 0.00000 - 71.5 10s 1711 46 0.00000 22 213 - 0.00000 - 71.3 15s * 1870 2 32 0.0000000 0.00000 0.0% 96.9 18s Cutting planes: Gomory: 1 Zero half: 15 Explored 1871 nodes (203241 simplex iterations) in 18.33 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:13:57 2012 Optimize a model with 2778 rows, 1122 columns and 8448 nonzeros Presolve time: 0.01s Presolved: 2778 rows, 1122 columns, 8448 nonzeros Variable types: 0 continuous, 1122 integer (1122 binary) Root relaxation: objective 0.000000e+00, 253 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 0 140 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 0.00000 0 348 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 1s 0 0 0.00000 0 317 - 0.00000 - - 2s 0 0 infeasible 0 - 0.10000 - - 2s Cutting planes: Clique: 12 Zero half: 349 Explored 0 nodes (14364 simplex iterations) in 2.41 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 5