current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:55 2012 Optimize a model with 17707 rows, 2057 columns and 54340 nonzeros Presolve time: 0.07s Presolved: 17707 rows, 2057 columns, 54340 nonzeros Variable types: 0 continuous, 2057 integer (2057 binary) Root relaxation: objective 0.000000e+00, 127 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 (373 simplex iterations) in 0.12 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 18:24:56 2012 Optimize a model with 8880 rows, 1368 columns and 27170 nonzeros Presolve time: 0.03s Presolved: 8880 rows, 1368 columns, 27170 nonzeros Variable types: 0 continuous, 1368 integer (1368 binary) Root relaxation: objective 0.000000e+00, 116 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 21 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1093 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:24:56 2012 Optimize a model with 4127 rows, 997 columns and 12540 nonzeros Presolve time: 0.01s Presolved: 4127 rows, 997 columns, 12540 nonzeros Variable types: 0 continuous, 997 integer (997 binary) Root relaxation: objective 0.000000e+00, 106 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 94 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2399 simplex iterations) in 0.34 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 18:24:56 2012 Optimize a model with 6164 rows, 1156 columns and 18810 nonzeros Presolve time: 0.02s Presolved: 6164 rows, 1156 columns, 18810 nonzeros Variable types: 0 continuous, 1156 integer (1156 binary) Root relaxation: objective 0.000000e+00, 113 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 62 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 120 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 114 - 0.00000 - - 1s 0 0 0.00000 0 160 - 0.00000 - - 2s 0 0 0.00000 0 143 - 0.00000 - - 2s 0 0 0.00000 0 155 - 0.00000 - - 3s 0 0 0.00000 0 148 - 0.00000 - - 3s 0 0 0.00000 0 170 - 0.00000 - - 4s 0 0 0.00000 0 169 - 0.00000 - - 4s 0 2 0.00000 0 169 - 0.00000 - - 5s 578 12 0.00000 12 124 - 0.00000 - 107 10s 806 19 0.00000 0 144 - 0.00000 - 110 15s 810 22 0.00000 0 160 - 0.00000 - 110 20s 824 27 0.00000 16 146 - 0.00000 - 155 25s 1144 20 0.00000 24 143 - 0.00000 - 151 30s 1546 18 0.00000 24 122 - 0.00000 - 151 35s Cutting planes: Clique: 35 Zero half: 3 Explored 1743 nodes (294493 simplex iterations) in 37.46 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 18:25:34 2012 Optimize a model with 7522 rows, 1262 columns and 22990 nonzeros Presolve time: 0.02s Presolved: 7522 rows, 1262 columns, 22990 nonzeros Variable types: 0 continuous, 1262 integer (1262 binary) Root relaxation: objective 0.000000e+00, 112 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 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (967 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:25:34 2012 Optimize a model with 6843 rows, 1209 columns and 20900 nonzeros Presolve time: 0.02s Presolved: 6843 rows, 1209 columns, 20900 nonzeros Variable types: 0 continuous, 1209 integer (1209 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 54 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 107 - 0.00000 - - 0s 0 0 0.00000 0 193 - 0.00000 - - 0s 0 0 0.00000 0 55 - 0.00000 - - 1s 0 0 0.00000 0 54 - 0.00000 - - 1s 0 0 0.00000 0 59 - 0.00000 - - 2s 0 0 0.00000 0 59 - 0.00000 - - 2s H 0 0 0.0000000 0.00000 0.0% - 2s Cutting planes: Clique: 9 Zero half: 1 Explored 0 nodes (18715 simplex iterations) in 2.31 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