current bounds on the number of colors: 0 -- 42 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:13 2012 Optimize a model with 8946 rows, 1306 columns and 27594 nonzeros Presolve time: 0.03s Presolved: 8946 rows, 1306 columns, 27594 nonzeros Variable types: 0 continuous, 1306 integer (1306 binary) Root relaxation: objective 0.000000e+00, 101 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 (240 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% current bounds on the number of colors: 0 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:14 2012 Optimize a model with 4282 rows, 844 columns and 13140 nonzeros Presolve time: 0.01s Presolved: 4282 rows, 844 columns, 13140 nonzeros Variable types: 0 continuous, 844 integer (844 binary) Root relaxation: objective 0.000000e+00, 100 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 (820 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% current bounds on the number of colors: 0 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:14 2012 Optimize a model with 2162 rows, 634 columns and 6570 nonzeros Presolve time: 0.01s Presolved: 2162 rows, 634 columns, 6570 nonzeros Variable types: 0 continuous, 634 integer (634 binary) Root relaxation: objective 0.000000e+00, 84 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 48 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1814 simplex iterations) in 0.17 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: 5 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:14 2012 Optimize a model with 3010 rows, 718 columns and 9198 nonzeros Presolve time: 0.01s Presolved: 3010 rows, 718 columns, 9198 nonzeros Variable types: 0 continuous, 718 integer (718 binary) Root relaxation: objective 0.000000e+00, 84 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 77 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 0.00000 0 153 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 191 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 1s 0 0 0.00000 0 179 - 0.00000 - - 1s 0 0 0.00000 0 184 - 0.00000 - - 1s 0 0 0.00000 0 158 - 0.00000 - - 1s 0 2 0.00000 0 158 - 0.00000 - - 2s Cutting planes: Clique: 61 Zero half: 1 Explored 9 nodes (18326 simplex iterations) in 2.12 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:16 2012 Optimize a model with 3434 rows, 760 columns and 10512 nonzeros Presolve time: 0.01s Presolved: 3434 rows, 760 columns, 10512 nonzeros Variable types: 0 continuous, 760 integer (760 binary) Root relaxation: objective 0.000000e+00, 84 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 82 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 93 - 0.00000 - - 0s 0 0 0.00000 0 157 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 19 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 147 - 0.00000 - - 1s 0 0 0.00000 0 114 - 0.00000 - - 1s 0 2 0.00000 0 33 - 0.00000 - - 1s Cutting planes: Clique: 17 Explored 301 nodes (30996 simplex iterations) in 3.02 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: 8 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:19 2012 Optimize a model with 3858 rows, 802 columns and 11826 nonzeros Presolve time: 0.01s Presolved: 3858 rows, 802 columns, 11826 nonzeros Variable types: 0 continuous, 802 integer (802 binary) Root relaxation: objective 0.000000e+00, 88 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (715 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% optimal solution found: number of colors: 9