current bounds on the number of colors: 0 -- 158 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:21 2012 Optimize a model with 48743 rows, 13097 columns and 158237 nonzeros Presolve time: 0.16s Presolved: 48743 rows, 13097 columns, 158237 nonzeros Variable types: 0 continuous, 13097 integer (13097 binary) Root relaxation: objective 0.000000e+00, 562 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 (914 simplex iterations) in 0.27 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:22 2012 Optimize a model with 24143 rows, 6777 columns and 78117 nonzeros Presolve time: 0.13s Presolved: 24143 rows, 6777 columns, 78117 nonzeros Variable types: 0 continuous, 6777 integer (6777 binary) Root relaxation: objective 0.000000e+00, 475 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 (807 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:23 2012 Optimize a model with 11843 rows, 3617 columns and 38057 nonzeros Presolve time: 0.04s Presolved: 11843 rows, 3617 columns, 38057 nonzeros Variable types: 0 continuous, 3617 integer (3617 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 (618 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:23 2012 Optimize a model with 5693 rows, 2037 columns and 18027 nonzeros Presolve time: 0.02s Presolved: 5693 rows, 2037 columns, 18027 nonzeros Variable types: 0 continuous, 2037 integer (2037 binary) Root relaxation: objective 0.000000e+00, 355 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 (647 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:23 2012 Optimize a model with 2618 rows, 1247 columns and 8012 nonzeros Presolve time: 0.01s Presolved: 2618 rows, 1247 columns, 8012 nonzeros Variable types: 0 continuous, 1247 integer (1247 binary) Root relaxation: objective 0.000000e+00, 357 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 0 304 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 305 - 0.00000 - - 0s 0 0 0.00000 0 380 - 0.00000 - - 1s 0 0 0.00000 0 364 - 0.00000 - - 1s 0 0 0.00000 0 385 - 0.00000 - - 1s 0 0 0.00000 0 385 - 0.00000 - - 2s 0 2 0.00000 0 385 - 0.00000 - - 2s 614 168 0.00000 16 340 - 0.00000 - 60.9 5s * 691 142 32 0.0000000 0.00000 0.0% 89.4 8s Cutting planes: Gomory: 7 Zero half: 7 Explored 692 nodes (81354 simplex iterations) in 8.82 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:32 2012 Optimize a model with 1388 rows, 931 columns and 4006 nonzeros Presolve removed 158 rows and 158 columns Presolve time: 0.00s Presolved: 1230 rows, 773 columns, 3690 nonzeros Variable types: 0 continuous, 773 integer (773 binary) Root relaxation: objective 0.000000e+00, 165 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 0 158 - 0.00000 - - 0s Explored 0 nodes (679 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:32 2012 Optimize a model with 2003 rows, 1089 columns and 6009 nonzeros Presolve time: 0.01s Presolved: 2003 rows, 1089 columns, 6009 nonzeros Variable types: 0 continuous, 1089 integer (1089 binary) Root relaxation: objective 0.000000e+00, 370 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 0 304 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 428 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 371 Explored 0 nodes (6903 simplex iterations) in 0.66 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4