current bounds on the number of colors: 0 -- 103 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:29 2012 Optimize a model with 27082 rows, 5782 columns and 86190 nonzeros Presolve time: 0.14s Presolved: 27082 rows, 5782 columns, 86190 nonzeros Variable types: 0 continuous, 5782 integer (5782 binary) Root relaxation: objective 0.000000e+00, 277 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 (559 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 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:30 2012 Optimize a model with 13328 rows, 3104 columns and 42250 nonzeros Presolve time: 0.05s Presolved: 13328 rows, 3104 columns, 42250 nonzeros Variable types: 0 continuous, 3104 integer (3104 binary) Root relaxation: objective 0.000000e+00, 217 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 (431 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:30 2012 Optimize a model with 6451 rows, 1765 columns and 20280 nonzeros Presolve time: 0.02s Presolved: 6451 rows, 1765 columns, 20280 nonzeros Variable types: 0 continuous, 1765 integer (1765 binary) Root relaxation: objective 0.000000e+00, 215 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 (402 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:30 2012 Optimize a model with 3277 rows, 1147 columns and 10140 nonzeros Presolve time: 0.01s Presolved: 3277 rows, 1147 columns, 10140 nonzeros Variable types: 0 continuous, 1147 integer (1147 binary) Root relaxation: objective 0.000000e+00, 222 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 8 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (950 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:30 2012 Optimize a model with 1690 rows, 838 columns and 5070 nonzeros Presolve time: 0.00s Presolved: 1690 rows, 838 columns, 5070 nonzeros Variable types: 0 continuous, 838 integer (838 binary) Root relaxation: objective 0.000000e+00, 240 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 0 206 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2809 simplex iterations) in 0.24 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:30 2012 Optimize a model with 2219 rows, 941 columns and 6760 nonzeros Presolve time: 0.01s Presolved: 2219 rows, 941 columns, 6760 nonzeros Variable types: 0 continuous, 941 integer (941 binary) Root relaxation: objective 0.000000e+00, 220 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 0 132 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 291 - 0.00000 - - 0s 0 0 0.00000 0 291 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 1s 0 0 0.00000 0 287 - 0.00000 - - 1s 0 0 0.00000 0 293 - 0.00000 - - 1s 0 0 0.00000 0 260 - 0.00000 - - 1s 0 2 0.00000 0 260 - 0.00000 - - 2s Cutting planes: Clique: 5 Zero half: 7 Explored 45 nodes (22815 simplex iterations) in 2.51 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:54:33 2012 Optimize a model with 2748 rows, 1044 columns and 8450 nonzeros Presolve time: 0.01s Presolved: 2748 rows, 1044 columns, 8450 nonzeros Variable types: 0 continuous, 1044 integer (1044 binary) Root relaxation: objective 0.000000e+00, 216 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 0 188 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1101 simplex iterations) in 0.05 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: 5