current bounds on the number of colors: 0 -- 76 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:56 2012 Optimize a model with 11020 rows, 3176 columns and 35720 nonzeros Presolve removed 1 rows and 38 columns Presolve time: 0.06s Presolved: 11019 rows, 3138 columns, 35682 nonzeros Variable types: 0 continuous, 3138 integer (3138 binary) Root relaxation: objective 0.000000e+00, 193 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 (341 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 -- 38 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:56 2012 Optimize a model with 5548 rows, 1732 columns and 17860 nonzeros Presolve removed 1 rows and 19 columns Presolve time: 0.02s Presolved: 5547 rows, 1713 columns, 17841 nonzeros Variable types: 0 continuous, 1713 integer (1713 binary) Root relaxation: objective 0.000000e+00, 158 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 0.03 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:56 2012 Optimize a model with 2668 rows, 972 columns and 8460 nonzeros Presolve removed 1 rows and 9 columns Presolve time: 0.01s Presolved: 2667 rows, 963 columns, 8451 nonzeros Variable types: 0 continuous, 963 integer (963 binary) Root relaxation: objective 0.000000e+00, 167 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 (292 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:56 2012 Optimize a model with 1228 rows, 592 columns and 3760 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1227 rows, 588 columns, 3756 nonzeros Variable types: 0 continuous, 588 integer (588 binary) Root relaxation: objective 0.000000e+00, 163 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 86 - 0.00000 - - 0s 0 0 0.00000 0 90 - 0.00000 - - 0s 0 0 0.00000 0 128 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 157 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 147 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 2 0.00000 0 129 - 0.00000 - - 0s * 51 2 13 0.0000000 0.00000 0.0% 54.0 0s Cutting planes: Clique: 3 Zero half: 10 Explored 52 nodes (10709 simplex iterations) in 0.55 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 Thu Dec 13 19:38:57 2012 Optimize a model with 652 rows, 440 columns and 1880 nonzeros Presolve removed 76 rows and 77 columns Presolve time: 0.00s Presolved: 576 rows, 363 columns, 1728 nonzeros Variable types: 0 continuous, 363 integer (363 binary) Root relaxation: objective 0.000000e+00, 82 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 75 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (324 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:38:57 2012 Optimize a model with 940 rows, 516 columns and 2820 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 939 rows, 513 columns, 2817 nonzeros Variable types: 0 continuous, 513 integer (513 binary) Root relaxation: objective 0.000000e+00, 170 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 0 142 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1730 simplex iterations) in 0.10 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