current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:20 2012 Optimize a model with 46740 rows, 12165 columns and 151316 nonzeros Presolve time: 0.16s Presolved: 46740 rows, 12165 columns, 151316 nonzeros Variable types: 0 continuous, 12165 integer (12165 binary) Root relaxation: objective 0.000000e+00, 532 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 (864 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:21 2012 Optimize a model with 23446 rows, 6389 columns and 75658 nonzeros Presolve time: 0.12s Presolved: 23446 rows, 6389 columns, 75658 nonzeros Variable types: 0 continuous, 6389 integer (6389 binary) Root relaxation: objective 0.000000e+00, 388 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 (693 simplex iterations) in 0.17 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 Fri Dec 14 18:50:22 2012 Optimize a model with 11799 rows, 3501 columns and 37829 nonzeros Presolve time: 0.04s Presolved: 11799 rows, 3501 columns, 37829 nonzeros Variable types: 0 continuous, 3501 integer (3501 binary) Root relaxation: objective 0.000000e+00, 318 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 (584 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 18:50:22 2012 Optimize a model with 5669 rows, 1981 columns and 17919 nonzeros Presolve time: 0.02s Presolved: 5669 rows, 1981 columns, 17919 nonzeros Variable types: 0 continuous, 1981 integer (1981 binary) Root relaxation: objective 0.000000e+00, 334 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 0.03 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 18:50:22 2012 Optimize a model with 2604 rows, 1221 columns and 7964 nonzeros Presolve time: 0.01s Presolved: 2604 rows, 1221 columns, 7964 nonzeros Variable types: 0 continuous, 1221 integer (1221 binary) Root relaxation: objective 0.000000e+00, 350 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 0 286 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 362 - 0.00000 - - 0s 0 0 0.00000 0 361 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 388 - 0.00000 - - 0s 0 0 0.00000 0 369 - 0.00000 - - 0s 0 2 0.00000 0 369 - 0.00000 - - 1s 709 120 0.00000 17 332 - 0.00000 - 72.6 5s 716 125 0.00000 20 323 - 0.00000 - 71.9 10s 726 132 0.00000 19 302 - 0.00000 - 70.9 15s * 775 109 23 0.0000000 0.00000 0.0% 124 15s Cutting planes: Zero half: 12 Explored 776 nodes (105186 simplex iterations) in 15.81 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 18:50:38 2012 Optimize a model with 1378 rows, 917 columns and 3982 nonzeros Presolve removed 152 rows and 152 columns Presolve time: 0.00s Presolved: 1226 rows, 765 columns, 3678 nonzeros Variable types: 0 continuous, 765 integer (765 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 0 152 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (668 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 18:50:38 2012 Optimize a model with 1991 rows, 1069 columns and 5973 nonzeros Presolve time: 0.01s Presolved: 1991 rows, 1069 columns, 5973 nonzeros Variable types: 0 continuous, 1069 integer (1069 binary) Root relaxation: objective 0.000000e+00, 348 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 0 296 - 0.00000 - - 0s 0 0 0.00000 0 399 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 39 Zero half: 328 Explored 0 nodes (5539 simplex iterations) in 0.53 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