current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:32:28 2012 Optimize a model with 20358 rows, 2210 columns and 62370 nonzeros Presolve time: 0.08s Presolved: 20358 rows, 2210 columns, 62370 nonzeros Variable types: 0 continuous, 2210 integer (2210 binary) Root relaxation: objective 0.000000e+00, 142 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 (486 simplex iterations) in 0.15 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:32:28 2012 Optimize a model with 9830 rows, 1454 columns and 30030 nonzeros Presolve time: 0.03s Presolved: 9830 rows, 1454 columns, 30030 nonzeros Variable types: 0 continuous, 1454 integer (1454 binary) Root relaxation: objective 0.000000e+00, 124 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 (1204 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 18:32:28 2012 Optimize a model with 4566 rows, 1076 columns and 13860 nonzeros Presolve time: 0.01s Presolved: 4566 rows, 1076 columns, 13860 nonzeros Variable types: 0 continuous, 1076 integer (1076 binary) Root relaxation: objective 0.000000e+00, 108 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 90 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2662 simplex iterations) in 0.36 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 18:32:29 2012 Optimize a model with 6822 rows, 1238 columns and 20790 nonzeros Presolve time: 0.02s Presolved: 6822 rows, 1238 columns, 20790 nonzeros Variable types: 0 continuous, 1238 integer (1238 binary) Root relaxation: objective 0.000000e+00, 118 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 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 1s 0 0 0.00000 0 257 - 0.00000 - - 1s 0 0 0.00000 0 149 - 0.00000 - - 2s 0 0 0.00000 0 164 - 0.00000 - - 3s 0 0 0.00000 0 240 - 0.00000 - - 4s 0 0 0.00000 0 263 - 0.00000 - - 5s 0 0 0.00000 0 247 - 0.00000 - - 5s 0 2 0.00000 0 247 - 0.00000 - - 6s Cutting planes: Clique: 190 Zero half: 5 Explored 135 nodes (57382 simplex iterations) in 9.21 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 18:32:38 2012 Optimize a model with 8326 rows, 1346 columns and 25410 nonzeros Presolve time: 0.02s Presolved: 8326 rows, 1346 columns, 25410 nonzeros Variable types: 0 continuous, 1346 integer (1346 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 33 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s Cutting planes: Clique: 4 Explored 0 nodes (2220 simplex iterations) in 0.23 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 18:32:39 2012 Optimize a model with 7574 rows, 1292 columns and 23100 nonzeros Presolve time: 0.02s Presolved: 7574 rows, 1292 columns, 23100 nonzeros Variable types: 0 continuous, 1292 integer (1292 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 58 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 1s 0 0 0.00000 0 207 - 0.00000 - - 1s 0 0 0.00000 0 112 - 0.00000 - - 2s 0 0 0.00000 0 94 - 0.00000 - - 2s 0 0 0.00000 0 94 - 0.00000 - - 3s 0 0 0.00000 0 119 - 0.00000 - - 4s 0 0 0.00000 0 152 - 0.00000 - - 4s 0 0 0.00000 0 157 - 0.00000 - - 5s 0 0 0.00000 0 157 - 0.00000 - - 5s 0 2 0.00000 0 157 - 0.00000 - - 6s 470 34 0.00000 18 111 - 0.00000 - 100 10s 1009 45 0.00000 8 151 - 0.00000 - 100 15s 1013 48 0.00000 14 183 - 0.00000 - 100 21s 1016 50 0.00000 23 198 - 0.00000 - 100 25s 1030 53 0.00000 14 162 - 0.00000 - 138 30s 1358 21 0.00000 26 120 - 0.00000 - 137 35s 1840 7 0.00000 17 144 - 0.00000 - 133 40s 2346 13 infeasible 31 - 0.00000 - 131 45s 2770 21 0.00000 25 137 - 0.00000 - 133 50s 3220 25 0.00000 28 141 - 0.00000 - 134 55s 3675 11 0.00000 21 137 - 0.00000 - 134 60s 4163 15 infeasible 25 - 0.00000 - 134 65s 4677 15 0.00000 26 114 - 0.00000 - 134 70s 5160 12 0.00000 25 109 - 0.00000 - 134 75s 5622 20 0.00000 27 116 - 0.00000 - 135 80s 6069 19 0.00000 29 129 - 0.00000 - 135 85s 6596 16 infeasible 27 - 0.00000 - 135 90s * 6619 1 25 0.0000000 0.00000 0.0% 134 90s Cutting planes: Clique: 41 Explored 6620 nodes (923517 simplex iterations) in 90.17 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