current bounds on the number of colors: 0 -- 167 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:17:39 2012 Optimize a model with 57271 rows, 14549 columns and 185173 nonzeros Presolve time: 0.17s Presolved: 57271 rows, 14549 columns, 185173 nonzeros Variable types: 0 continuous, 14549 integer (14549 binary) Root relaxation: objective 0.000000e+00, 611 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 (958 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 -- 83 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:17:40 2012 Optimize a model with 28375 rows, 7535 columns and 91471 nonzeros Presolve time: 0.14s Presolved: 28375 rows, 7535 columns, 91471 nonzeros Variable types: 0 continuous, 7535 integer (7535 binary) Root relaxation: objective 0.000000e+00, 405 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 (707 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:17:41 2012 Optimize a model with 13927 rows, 4028 columns and 44620 nonzeros Presolve time: 0.05s Presolved: 13927 rows, 4028 columns, 44620 nonzeros Variable types: 0 continuous, 4028 integer (4028 binary) Root relaxation: objective 0.000000e+00, 364 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 0.08 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 20:17:41 2012 Optimize a model with 7047 rows, 2358 columns and 22310 nonzeros Presolve time: 0.02s Presolved: 7047 rows, 2358 columns, 22310 nonzeros Variable types: 0 continuous, 2358 integer (2358 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 (645 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 20:17:41 2012 Optimize a model with 3607 rows, 1523 columns and 11155 nonzeros Presolve time: 0.01s Presolved: 3607 rows, 1523 columns, 11155 nonzeros Variable types: 0 continuous, 1523 integer (1523 binary) Root relaxation: objective 0.000000e+00, 374 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 39 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2374 simplex iterations) in 0.10 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 20:17:42 2012 Optimize a model with 1543 rows, 1022 columns and 4462 nonzeros Presolve removed 167 rows and 167 columns Presolve time: 0.00s Presolved: 1376 rows, 855 columns, 4128 nonzeros Variable types: 0 continuous, 855 integer (855 binary) Root relaxation: objective 0.000000e+00, 174 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 0 167 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (743 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 20:17:42 2012 Optimize a model with 2231 rows, 1189 columns and 6693 nonzeros Presolve time: 0.01s Presolved: 2231 rows, 1189 columns, 6693 nonzeros Variable types: 0 continuous, 1189 integer (1189 binary) Root relaxation: objective 0.000000e+00, 374 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 0 334 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3751 simplex iterations) in 0.38 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 20:17:42 2012 Optimize a model with 2919 rows, 1356 columns and 8924 nonzeros Presolve time: 0.01s Presolved: 2919 rows, 1356 columns, 8924 nonzeros Variable types: 0 continuous, 1356 integer (1356 binary) Root relaxation: objective 0.000000e+00, 400 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 0 324 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 390 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 1s 0 0 0.00000 0 212 - 0.00000 - - 1s 0 0 0.00000 0 206 - 0.00000 - - 1s 0 0 0.00000 0 213 - 0.00000 - - 1s 0 0 0.00000 0 194 - 0.00000 - - 1s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 180 - 0.00000 - - 2s 0 0 0.00000 0 156 - 0.00000 - - 2s 0 0 0.00000 0 156 - 0.00000 - - 2s 0 0 0.00000 0 158 - 0.00000 - - 2s 0 0 0.00000 0 158 - 0.00000 - - 3s 0 2 0.00000 0 158 - 0.00000 - - 3s 601 139 0.00000 18 324 - 0.00000 - 58.7 5s 639 164 0.00000 25 270 - 0.00000 - 94.1 10s * 765 88 30 0.0000000 0.00000 0.0% 102 11s Cutting planes: Clique: 1 Zero half: 10 Explored 766 nodes (113731 simplex iterations) in 11.08 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% optimal solution found: number of colors: 4