current bounds on the number of colors: 0 -- 128 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:35 2012 Optimize a model with 28416 rows, 8634 columns and 93056 nonzeros Presolve time: 0.13s Presolved: 28416 rows, 8634 columns, 93056 nonzeros Variable types: 0 continuous, 8634 integer (8634 binary) Root relaxation: objective 0.000000e+00, 443 iterations, 0.03 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 (716 simplex iterations) in 0.21 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 -- 64 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:36 2012 Optimize a model with 14272 rows, 4538 columns and 46528 nonzeros Presolve time: 0.07s Presolved: 14272 rows, 4538 columns, 46528 nonzeros Variable types: 0 continuous, 4538 integer (4538 binary) Root relaxation: objective 0.000000e+00, 322 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 (558 simplex iterations) in 0.10 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:36 2012 Optimize a model with 7200 rows, 2490 columns and 23264 nonzeros Presolve time: 0.03s Presolved: 7200 rows, 2490 columns, 23264 nonzeros Variable types: 0 continuous, 2490 integer (2490 binary) Root relaxation: objective 0.000000e+00, 264 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 (475 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:36 2012 Optimize a model with 3664 rows, 1466 columns and 11632 nonzeros Presolve time: 0.01s Presolved: 3664 rows, 1466 columns, 11632 nonzeros Variable types: 0 continuous, 1466 integer (1466 binary) Root relaxation: objective 0.000000e+00, 274 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 (580 simplex iterations) in 0.02 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:36 2012 Optimize a model with 1896 rows, 954 columns and 5816 nonzeros Presolve time: 0.00s Presolved: 1896 rows, 954 columns, 5816 nonzeros Variable types: 0 continuous, 954 integer (954 binary) Root relaxation: objective 0.000000e+00, 281 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 0 228 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1376 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:33:36 2012 Optimize a model with 1012 rows, 698 columns and 2908 nonzeros Presolve removed 128 rows and 128 columns Presolve time: 0.00s Presolved: 884 rows, 570 columns, 2652 nonzeros Variable types: 0 continuous, 570 integer (570 binary) Root relaxation: objective 0.000000e+00, 134 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 0 128 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (548 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 Fri Dec 14 18:33:37 2012 Optimize a model with 1454 rows, 826 columns and 4362 nonzeros Presolve time: 0.00s Presolved: 1454 rows, 826 columns, 4362 nonzeros Variable types: 0 continuous, 826 integer (826 binary) Root relaxation: objective 0.000000e+00, 294 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 0 248 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Clique: 1 Zero half: 273 Explored 0 nodes (5765 simplex iterations) in 0.46 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