current bounds on the number of colors: 0 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:20:25 2012 Optimize a model with 17524 rows, 2024 columns and 53768 nonzeros Presolve time: 0.07s Presolved: 17524 rows, 2024 columns, 53768 nonzeros Variable types: 0 continuous, 2024 integer (2024 binary) Root relaxation: objective 0.000000e+00, 141 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 (344 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:20:26 2012 Optimize a model with 8788 rows, 1348 columns and 26884 nonzeros Presolve time: 0.03s Presolved: 8788 rows, 1348 columns, 26884 nonzeros Variable types: 0 continuous, 1348 integer (1348 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 10 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1081 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:20:26 2012 Optimize a model with 4084 rows, 984 columns and 12408 nonzeros Presolve time: 0.01s Presolved: 4084 rows, 984 columns, 12408 nonzeros Variable types: 0 continuous, 984 integer (984 binary) Root relaxation: objective 0.000000e+00, 107 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 78 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3607 simplex iterations) in 0.52 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:20:27 2012 Optimize a model with 6100 rows, 1140 columns and 18612 nonzeros Presolve time: 0.02s Presolved: 6100 rows, 1140 columns, 18612 nonzeros Variable types: 0 continuous, 1140 integer (1140 binary) Root relaxation: objective 0.000000e+00, 120 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 58 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 124 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 163 - 0.00000 - - 1s 0 0 0.00000 0 156 - 0.00000 - - 2s 0 0 0.00000 0 169 - 0.00000 - - 2s 0 0 0.00000 0 162 - 0.00000 - - 3s 0 0 0.00000 0 173 - 0.00000 - - 4s 0 0 0.00000 0 207 - 0.00000 - - 4s 0 0 0.00000 0 207 - 0.00000 - - 5s 0 2 0.00000 0 207 - 0.00000 - - 5s 374 10 infeasible 16 - 0.00000 - 136 10s 607 21 0.00000 0 136 - 0.00000 - 132 15s 611 23 0.00000 0 170 - 0.00000 - 131 21s 613 25 0.00000 0 213 - 0.00000 - 130 25s 696 21 infeasible 34 - 0.00000 - 183 30s 1081 13 0.00000 26 119 - 0.00000 - 172 35s 1445 13 0.00000 30 89 - 0.00000 - 167 40s 1826 12 0.00000 29 125 - 0.00000 - 163 45s Cutting planes: Clique: 26 Zero half: 3 Explored 2191 nodes (386049 simplex iterations) in 49.98 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:21:17 2012 Optimize a model with 7444 rows, 1244 columns and 22748 nonzeros Presolve time: 0.02s Presolved: 7444 rows, 1244 columns, 22748 nonzeros Variable types: 0 continuous, 1244 integer (1244 binary) Root relaxation: objective 0.000000e+00, 108 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 40 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (870 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:21:17 2012 Optimize a model with 6772 rows, 1192 columns and 20680 nonzeros Presolve time: 0.02s Presolved: 6772 rows, 1192 columns, 20680 nonzeros Variable types: 0 continuous, 1192 integer (1192 binary) Root relaxation: objective 0.000000e+00, 121 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 30 - 0.00000 - - 0s 0 0 0.00000 0 45 - 0.00000 - - 0s 0 0 0.00000 0 102 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 0s 0 0 0.00000 0 101 - 0.00000 - - 1s 0 0 0.00000 0 130 - 0.00000 - - 2s 0 0 0.00000 0 43 - 0.00000 - - 2s 0 0 0.00000 0 59 - 0.00000 - - 3s * 0 0 0 0.0000000 0.00000 0.0% - 3s Cutting planes: Clique: 9 Zero half: 10 Explored 0 nodes (25087 simplex iterations) in 3.49 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