current bounds on the number of colors: 0 -- 162 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:16 2012 Optimize a model with 52650 rows, 13770 columns and 170586 nonzeros Presolve time: 0.17s Presolved: 52650 rows, 13770 columns, 170586 nonzeros Variable types: 0 continuous, 13770 integer (13770 binary) Root relaxation: objective 0.000000e+00, 620 iterations, 0.05 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 (1003 simplex iterations) in 0.30 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 -- 81 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:17 2012 Optimize a model with 26082 rows, 7128 columns and 84240 nonzeros Presolve time: 0.13s Presolved: 26082 rows, 7128 columns, 84240 nonzeros Variable types: 0 continuous, 7128 integer (7128 binary) Root relaxation: objective 0.000000e+00, 496 iterations, 0.03 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 (854 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:18 2012 Optimize a model with 13122 rows, 3888 columns and 42120 nonzeros Presolve time: 0.05s Presolved: 13122 rows, 3888 columns, 42120 nonzeros Variable types: 0 continuous, 3888 integer (3888 binary) Root relaxation: objective 0.000000e+00, 361 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 (768 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:18 2012 Optimize a model with 6642 rows, 2268 columns and 21060 nonzeros Presolve time: 0.02s Presolved: 6642 rows, 2268 columns, 21060 nonzeros Variable types: 0 continuous, 2268 integer (2268 binary) Root relaxation: objective 0.000000e+00, 342 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 (628 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:18 2012 Optimize a model with 3402 rows, 1458 columns and 10530 nonzeros Presolve time: 0.01s Presolved: 3402 rows, 1458 columns, 10530 nonzeros Variable types: 0 continuous, 1458 integer (1458 binary) Root relaxation: objective 0.000000e+00, 351 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 (2099 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:18 2012 Optimize a model with 1458 rows, 972 columns and 4212 nonzeros Presolve removed 162 rows and 162 columns Presolve time: 0.00s Presolved: 1296 rows, 810 columns, 3888 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Root relaxation: objective 0.000000e+00, 169 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 0 162 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (697 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 Fri Dec 14 19:34:18 2012 Optimize a model with 2106 rows, 1134 columns and 6318 nonzeros Presolve time: 0.01s Presolved: 2106 rows, 1134 columns, 6318 nonzeros Variable types: 0 continuous, 1134 integer (1134 binary) Root relaxation: objective 0.000000e+00, 377 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 0 312 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4324 simplex iterations) in 0.34 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 Fri Dec 14 19:34:19 2012 Optimize a model with 2754 rows, 1296 columns and 8424 nonzeros Presolve time: 0.01s Presolved: 2754 rows, 1296 columns, 8424 nonzeros Variable types: 0 continuous, 1296 integer (1296 binary) Root relaxation: objective 0.000000e+00, 368 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 0 308 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 319 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 259 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 246 - 0.00000 - - 2s 0 0 0.00000 0 236 - 0.00000 - - 2s 0 0 0.00000 0 234 - 0.00000 - - 2s 0 0 0.00000 0 204 - 0.00000 - - 2s 0 0 0.00000 0 192 - 0.00000 - - 2s 0 0 0.00000 0 188 - 0.00000 - - 3s 0 0 0.00000 0 192 - 0.00000 - - 3s 0 0 0.00000 0 186 - 0.00000 - - 3s 0 0 0.00000 0 206 - 0.00000 - - 3s 0 0 0.00000 0 202 - 0.00000 - - 3s 0 2 0.00000 0 202 - 0.00000 - - 4s 231 27 0.00000 16 262 - 0.00000 - 88.2 5s 808 60 0.00000 18 319 - 0.00000 - 77.4 10s * 1025 2 27 0.0000000 0.00000 0.0% 112 14s Cutting planes: Gomory: 1 Clique: 1 Zero half: 16 Explored 1026 nodes (161519 simplex iterations) in 14.06 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: 4