current bounds on the number of colors: 0 -- 166 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:06:45 2012 Optimize a model with 58515 rows, 14481 columns and 188825 nonzeros Presolve time: 0.18s Presolved: 58515 rows, 14481 columns, 188825 nonzeros Variable types: 0 continuous, 14481 integer (14481 binary) Root relaxation: objective 0.000000e+00, 586 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 (931 simplex iterations) in 0.31 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 -- 83 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:06:46 2012 Optimize a model with 28989 rows, 7509 columns and 93275 nonzeros Presolve time: 0.14s Presolved: 28989 rows, 7509 columns, 93275 nonzeros Variable types: 0 continuous, 7509 integer (7509 binary) Root relaxation: objective 0.000000e+00, 508 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 (844 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:06:46 2012 Optimize a model with 14226 rows, 4023 columns and 45500 nonzeros Presolve time: 0.05s Presolved: 14226 rows, 4023 columns, 45500 nonzeros Variable types: 0 continuous, 4023 integer (4023 binary) Root relaxation: objective 0.000000e+00, 360 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 (663 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:06:47 2012 Optimize a model with 7196 rows, 2363 columns and 22750 nonzeros Presolve time: 0.02s Presolved: 7196 rows, 2363 columns, 22750 nonzeros Variable types: 0 continuous, 2363 integer (2363 binary) Root relaxation: objective 0.000000e+00, 370 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 (665 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 20:06:47 2012 Optimize a model with 3681 rows, 1533 columns and 11375 nonzeros Presolve time: 0.01s Presolved: 3681 rows, 1533 columns, 11375 nonzeros Variable types: 0 continuous, 1533 integer (1533 binary) Root relaxation: objective 0.000000e+00, 367 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 (1285 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:06:47 2012 Optimize a model with 1572 rows, 1035 columns and 4550 nonzeros Presolve removed 166 rows and 166 columns Presolve time: 0.00s Presolved: 1406 rows, 869 columns, 4218 nonzeros Variable types: 0 continuous, 869 integer (869 binary) Root relaxation: objective 0.000000e+00, 176 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 0 166 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (718 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 20:06:47 2012 Optimize a model with 2275 rows, 1201 columns and 6825 nonzeros Presolve time: 0.01s Presolved: 2275 rows, 1201 columns, 6825 nonzeros Variable types: 0 continuous, 1201 integer (1201 binary) Root relaxation: objective 0.000000e+00, 371 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 0 322 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4327 simplex iterations) in 0.48 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 20:06:47 2012 Optimize a model with 2978 rows, 1367 columns and 9100 nonzeros Presolve time: 0.01s Presolved: 2978 rows, 1367 columns, 9100 nonzeros Variable types: 0 continuous, 1367 integer (1367 binary) Root relaxation: objective 0.000000e+00, 368 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 377 - 0.00000 - - 0s 0 0 0.00000 0 391 - 0.00000 - - 1s 0 0 0.00000 0 388 - 0.00000 - - 1s 0 0 0.00000 0 403 - 0.00000 - - 2s 0 0 0.00000 0 403 - 0.00000 - - 2s 0 2 0.00000 0 403 - 0.00000 - - 2s 577 11 0.00000 12 317 - 0.00000 - 84.3 5s 1805 28 0.00000 14 282 - 0.00000 - 80.4 10s 1810 31 0.00000 23 397 - 0.00000 - 80.2 15s 2215 28 infeasible 29 - 0.00000 - 107 20s 2640 33 0.00000 27 272 - 0.00000 - 121 25s 3097 38 0.00000 32 248 - 0.00000 - 132 30s 3581 28 infeasible 33 - 0.00000 - 139 35s 4043 16 infeasible 29 - 0.00000 - 145 40s 4470 13 infeasible 29 - 0.00000 - 151 45s 4875 18 0.00000 26 282 - 0.00000 - 156 50s 5367 30 infeasible 36 - 0.00000 - 158 55s 5855 14 infeasible 31 - 0.00000 - 160 60s 6367 18 infeasible 30 - 0.00000 - 161 65s 6824 7 infeasible 32 - 0.00000 - 163 70s 7296 5 infeasible 33 - 0.00000 - 165 75s 7688 27 infeasible 32 - 0.00000 - 168 80s * 8020 2 34 0.0000000 0.00000 0.0% 169 84s Cutting planes: Gomory: 2 Clique: 2 Zero half: 20 Explored 8021 nodes (1379539 simplex iterations) in 84.14 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