current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:27 2012 Optimize a model with 15826 rows, 1906 columns and 48600 nonzeros Presolve time: 0.06s Presolved: 15826 rows, 1906 columns, 48600 nonzeros Variable types: 0 continuous, 1906 integer (1906 binary) Root relaxation: objective 0.000000e+00, 111 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 (423 simplex iterations) in 0.11 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 18:16:28 2012 Optimize a model with 7623 rows, 1243 columns and 23328 nonzeros Presolve time: 0.02s Presolved: 7623 rows, 1243 columns, 23328 nonzeros Variable types: 0 continuous, 1243 integer (1243 binary) Root relaxation: objective 0.000000e+00, 115 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 48 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (836 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:28 2012 Optimize a model with 3837 rows, 937 columns and 11664 nonzeros Presolve time: 0.01s Presolved: 3837 rows, 937 columns, 11664 nonzeros Variable types: 0 continuous, 937 integer (937 binary) Root relaxation: objective 0.000000e+00, 103 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 70 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2490 simplex iterations) in 0.32 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:28 2012 Optimize a model with 5730 rows, 1090 columns and 17496 nonzeros Presolve time: 0.02s Presolved: 5730 rows, 1090 columns, 17496 nonzeros Variable types: 0 continuous, 1090 integer (1090 binary) Root relaxation: objective 0.000000e+00, 114 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 46 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 0.00000 0 126 - 0.00000 - - 0s 0 0 0.00000 0 211 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 1s 0 0 0.00000 0 116 - 0.00000 - - 1s 0 0 0.00000 0 107 - 0.00000 - - 2s 0 0 0.00000 0 149 - 0.00000 - - 2s 0 0 0.00000 0 140 - 0.00000 - - 3s 0 0 0.00000 0 205 - 0.00000 - - 3s 0 0 0.00000 0 228 - 0.00000 - - 4s 0 0 0.00000 0 228 - 0.00000 - - 4s 0 2 0.00000 0 228 - 0.00000 - - 5s 603 17 0.00000 0 42 - 0.00000 - 111 10s 610 22 0.00000 0 175 - 0.00000 - 110 15s 632 30 0.00000 20 150 - 0.00000 - 155 20s 1065 13 0.00000 26 94 - 0.00000 - 147 25s Cutting planes: Gomory: 1 Clique: 21 Zero half: 1 Explored 1549 nodes (253762 simplex iterations) in 29.91 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: 9 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:58 2012 Optimize a model with 6361 rows, 1141 columns and 19440 nonzeros Presolve time: 0.02s Presolved: 6361 rows, 1141 columns, 19440 nonzeros Variable types: 0 continuous, 1141 integer (1141 binary) Root relaxation: objective 0.000000e+00, 115 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 32 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (984 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% optimal solution found: number of colors: 10