current bounds on the number of colors: 0 -- 89 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:39 2012 Optimize a model with 9725 rows, 4135 columns and 32824 nonzeros Presolve removed 1 rows and 44 columns Presolve time: 0.06s Presolved: 9724 rows, 4091 columns, 32780 nonzeros Variable types: 0 continuous, 4091 integer (4091 binary) Root relaxation: objective 0.000000e+00, 242 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 (392 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:39 2012 Optimize a model with 4907 rows, 2177 columns and 16412 nonzeros Presolve removed 1 rows and 22 columns Presolve time: 0.02s Presolved: 4906 rows, 2155 columns, 16390 nonzeros Variable types: 0 continuous, 2155 integer (2155 binary) Root relaxation: objective 0.000000e+00, 209 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 (359 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:39 2012 Optimize a model with 2498 rows, 1198 columns and 8206 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.01s Presolved: 2497 rows, 1187 columns, 8195 nonzeros Variable types: 0 continuous, 1187 integer (1187 binary) Root relaxation: objective 0.000000e+00, 187 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 (315 simplex iterations) in 0.01 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:39 2012 Optimize a model with 1184 rows, 664 columns and 3730 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1183 rows, 659 columns, 3725 nonzeros Variable types: 0 continuous, 659 integer (659 binary) Root relaxation: objective 0.000000e+00, 208 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 (329 simplex iterations) in 0.01 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 18:22:39 2012 Optimize a model with 527 rows, 397 columns and 1492 nonzeros Presolve removed 89 rows and 90 columns Presolve time: 0.00s Presolved: 438 rows, 307 columns, 1314 nonzeros Variable types: 0 continuous, 307 integer (307 binary) Root relaxation: objective 0.000000e+00, 102 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 88 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (370 simplex iterations) in 0.01 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 18:22:39 2012 Optimize a model with 746 rows, 486 columns and 2238 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 745 rows, 483 columns, 2235 nonzeros Variable types: 0 continuous, 483 integer (483 binary) Root relaxation: objective 0.000000e+00, 213 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 0 154 - 0.00000 - - 0s 0 0 0.00000 0 158 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 0s 0 0 0.00000 0 161 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 2 0.00000 0 185 - 0.00000 - - 0s Cutting planes: Zero half: 5 Explored 23 nodes (6073 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:40 2012 Optimize a model with 965 rows, 575 columns and 2984 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 964 rows, 571 columns, 2980 nonzeros Variable types: 0 continuous, 571 integer (571 binary) Root relaxation: objective 0.000000e+00, 209 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 (383 simplex iterations) in 0.01 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