current bounds on the number of colors: 0 -- 113 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:10:14 2012 Optimize a model with 35729 rows, 6964 columns and 113176 nonzeros Presolve time: 0.14s Presolved: 35729 rows, 6964 columns, 113176 nonzeros Variable types: 0 continuous, 6964 integer (6964 binary) Root relaxation: objective 0.000000e+00, 282 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 (533 simplex iterations) in 0.23 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 -- 56 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:10:15 2012 Optimize a model with 17921 rows, 3800 columns and 56588 nonzeros Presolve time: 0.08s Presolved: 17921 rows, 3800 columns, 56588 nonzeros Variable types: 0 continuous, 3800 integer (3800 binary) Root relaxation: objective 0.000000e+00, 268 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 (547 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 20:10:15 2012 Optimize a model with 9017 rows, 2218 columns and 28294 nonzeros Presolve time: 0.03s Presolved: 9017 rows, 2218 columns, 28294 nonzeros Variable types: 0 continuous, 2218 integer (2218 binary) Root relaxation: objective 0.000000e+00, 235 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 (463 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 20:10:15 2012 Optimize a model with 4565 rows, 1427 columns and 14147 nonzeros Presolve time: 0.01s Presolved: 4565 rows, 1427 columns, 14147 nonzeros Variable types: 0 continuous, 1427 integer (1427 binary) Root relaxation: objective 0.000000e+00, 237 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 (552 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:10:15 2012 Optimize a model with 2021 rows, 975 columns and 6063 nonzeros Presolve time: 0.00s Presolved: 2021 rows, 975 columns, 6063 nonzeros Variable types: 0 continuous, 975 integer (975 binary) Root relaxation: objective 0.000000e+00, 248 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 0 226 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2973 simplex iterations) in 0.33 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 20:10:16 2012 Optimize a model with 3293 rows, 1201 columns and 10105 nonzeros Presolve time: 0.01s Presolved: 3293 rows, 1201 columns, 10105 nonzeros Variable types: 0 continuous, 1201 integer (1201 binary) Root relaxation: objective 0.000000e+00, 251 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 0 173 - 0.00000 - - 0s 0 0 0.00000 0 219 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 1s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 0 0.00000 0 220 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 1s 0 0 0.00000 0 285 - 0.00000 - - 2s 0 0 0.00000 0 285 - 0.00000 - - 2s 0 2 0.00000 0 193 - 0.00000 - - 2s 605 118 0.00000 9 229 - 0.00000 - 61.7 5s 614 124 0.00000 21 193 - 0.00000 - 60.8 10s * 655 112 33 0.0000000 0.00000 0.0% 110 12s Cutting planes: Gomory: 2 Zero half: 8 Explored 656 nodes (93929 simplex iterations) in 12.21 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 20:10:28 2012 Optimize a model with 2657 rows, 1088 columns and 8084 nonzeros Presolve time: 0.01s Presolved: 2657 rows, 1088 columns, 8084 nonzeros Variable types: 0 continuous, 1088 integer (1088 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 0 224 - 0.00000 - - 0s 0 0 0.00000 0 191 - 0.00000 - - 0s 0 0 0.00000 0 307 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 1s 0 0 0.00000 0 311 - 0.00000 - - 1s 0 0 0.00000 0 307 - 0.00000 - - 2s 0 0 0.00000 0 315 - 0.00000 - - 2s 0 0 0.00000 0 308 - 0.00000 - - 3s 0 0 0.00000 0 308 - 0.00000 - - 3s 0 0 0.00000 0 304 - 0.00000 - - 3s 0 0 0.00000 0 302 - 0.00000 - - 4s 0 0 0.00000 0 307 - 0.00000 - - 4s 0 0 0.00000 0 300 - 0.00000 - - 5s 0 0 0.00000 0 298 - 0.00000 - - 5s 0 0 0.00000 0 295 - 0.00000 - - 5s 0 0 0.00000 0 298 - 0.00000 - - 6s 0 0 0.00000 0 298 - 0.00000 - - 6s 0 2 0.00000 0 298 - 0.00000 - - 7s Cutting planes: Clique: 16 Zero half: 18 Explored 52 nodes (48459 simplex iterations) in 8.02 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