current bounds on the number of colors: 0 -- 162 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:53 2012 Optimize a model with 52245 rows, 13765 columns and 169371 nonzeros Presolve time: 0.17s Presolved: 52245 rows, 13765 columns, 169371 nonzeros Variable types: 0 continuous, 13765 integer (13765 binary) Root relaxation: objective 0.000000e+00, 582 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 (908 simplex iterations) in 0.29 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 19:34:54 2012 Optimize a model with 25882 rows, 7123 columns and 83640 nonzeros Presolve time: 0.13s Presolved: 25882 rows, 7123 columns, 83640 nonzeros Variable types: 0 continuous, 7123 integer (7123 binary) Root relaxation: objective 0.000000e+00, 398 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 (703 simplex iterations) in 0.18 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 19:34:54 2012 Optimize a model with 13022 rows, 3883 columns and 41820 nonzeros Presolve time: 0.05s Presolved: 13022 rows, 3883 columns, 41820 nonzeros Variable types: 0 continuous, 3883 integer (3883 binary) Root relaxation: objective 0.000000e+00, 333 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 (619 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 19:34:54 2012 Optimize a model with 6592 rows, 2263 columns and 20910 nonzeros Presolve time: 0.02s Presolved: 6592 rows, 2263 columns, 20910 nonzeros Variable types: 0 continuous, 2263 integer (2263 binary) Root relaxation: objective 0.000000e+00, 345 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 (618 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 19:34:54 2012 Optimize a model with 3377 rows, 1453 columns and 10455 nonzeros Presolve time: 0.01s Presolved: 3377 rows, 1453 columns, 10455 nonzeros Variable types: 0 continuous, 1453 integer (1453 binary) Root relaxation: objective 0.000000e+00, 366 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 (1530 simplex iterations) in 0.07 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 19:34:55 2012 Optimize a model with 1448 rows, 967 columns and 4182 nonzeros Presolve removed 162 rows and 162 columns Presolve time: 0.00s Presolved: 1286 rows, 805 columns, 3858 nonzeros Variable types: 0 continuous, 805 integer (805 binary) Root relaxation: objective 0.000000e+00, 171 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 (699 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 19:34:55 2012 Optimize a model with 2091 rows, 1129 columns and 6273 nonzeros Presolve time: 0.01s Presolved: 2091 rows, 1129 columns, 6273 nonzeros Variable types: 0 continuous, 1129 integer (1129 binary) Root relaxation: objective 0.000000e+00, 384 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 0 318 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 444 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 1s 0 0 0.00000 0 342 - 0.00000 - - 1s 0 0 0.00000 0 422 - 0.00000 - - 1s 0 0 0.00000 0 356 - 0.00000 - - 2s 0 0 0.00000 0 411 - 0.00000 - - 2s 0 0 0.00000 0 312 - 0.00000 - - 2s 0 2 0.00000 0 312 - 0.00000 - - 3s Cutting planes: Zero half: 7 Explored 3 nodes (26711 simplex iterations) in 3.10 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 19:34:58 2012 Optimize a model with 2734 rows, 1291 columns and 8364 nonzeros Presolve time: 0.01s Presolved: 2734 rows, 1291 columns, 8364 nonzeros Variable types: 0 continuous, 1291 integer (1291 binary) Root relaxation: objective 0.000000e+00, 355 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 0s 0 0 0.00000 0 363 - 0.00000 - - 0s 0 0 0.00000 0 357 - 0.00000 - - 1s 0 0 0.00000 0 368 - 0.00000 - - 1s 0 0 0.00000 0 368 - 0.00000 - - 1s 0 2 0.00000 0 368 - 0.00000 - - 2s * 344 1 26 0.0000000 0.00000 0.0% 61.5 2s Cutting planes: Zero half: 27 Explored 345 nodes (38113 simplex iterations) in 2.89 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