current bounds on the number of colors: 0 -- 56 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:52:50 2012 Optimize a model with 21476 rows, 2333 columns and 65828 nonzeros Presolve time: 0.09s Presolved: 21476 rows, 2333 columns, 65828 nonzeros Variable types: 0 continuous, 2333 integer (2333 binary) Root relaxation: objective 0.000000e+00, 189 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 (695 simplex iterations) in 0.17 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% current bounds on the number of colors: 0 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:52:50 2012 Optimize a model with 10766 rows, 1549 columns and 32914 nonzeros Presolve time: 0.03s Presolved: 10766 rows, 1549 columns, 32914 nonzeros Variable types: 0 continuous, 1549 integer (1549 binary) Root relaxation: objective 0.000000e+00, 125 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 (1279 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:52:50 2012 Optimize a model with 5411 rows, 1157 columns and 16457 nonzeros Presolve time: 0.01s Presolved: 5411 rows, 1157 columns, 16457 nonzeros Variable types: 0 continuous, 1157 integer (1157 binary) Root relaxation: objective 0.000000e+00, 113 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 84 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 1s 0 0 0.00000 0 350 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 3s 0 0 0.00000 0 332 - 0.00000 - - 5s 0 0 0.00000 0 312 - 0.00000 - - 6s 0 0 0.00000 0 323 - 0.00000 - - 8s 0 0 0.00000 0 329 - 0.00000 - - 10s 0 0 0.00000 0 329 - 0.00000 - - 10s 0 2 0.00000 0 329 - 0.00000 - - 11s Cutting planes: Clique: 99 Zero half: 29 Explored 3 nodes (41481 simplex iterations) in 11.74 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:53:02 2012 Optimize a model with 7706 rows, 1325 columns and 23510 nonzeros Presolve time: 0.02s Presolved: 7706 rows, 1325 columns, 23510 nonzeros Variable types: 0 continuous, 1325 integer (1325 binary) Root relaxation: objective 0.000000e+00, 126 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 66 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 1s 0 0 0.00000 0 239 - 0.00000 - - 1s 0 0 0.00000 0 138 - 0.00000 - - 1s 0 0 0.00000 0 173 - 0.00000 - - 2s 0 0 0.00000 0 136 - 0.00000 - - 3s 0 0 0.00000 0 121 - 0.00000 - - 4s 0 0 0.00000 0 186 - 0.00000 - - 5s 0 0 0.00000 0 136 - 0.00000 - - 6s 0 0 0.00000 0 159 - 0.00000 - - 7s 0 0 0.00000 0 146 - 0.00000 - - 7s 0 2 0.00000 0 146 - 0.00000 - - 8s 169 27 infeasible 27 - 0.00000 - 90.3 10s 890 29 0.00000 24 106 - 0.00000 - 89.9 15s 1205 35 0.00000 26 97 - 0.00000 - 91.4 20s 1209 37 0.00000 18 111 - 0.00000 - 91.1 25s 1213 40 0.00000 24 55 - 0.00000 - 90.8 31s 1218 43 0.00000 17 169 - 0.00000 - 132 35s 1236 45 0.00000 25 98 - 0.00000 - 133 40s * 1391 2 39 0.0000000 0.00000 0.0% 132 42s Cutting planes: Clique: 7 Zero half: 2 Explored 1392 nodes (227965 simplex iterations) in 42.48 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:53:45 2012 Optimize a model with 6176 rows, 1213 columns and 18808 nonzeros Presolve time: 0.02s Presolved: 6176 rows, 1213 columns, 18808 nonzeros Variable types: 0 continuous, 1213 integer (1213 binary) Root relaxation: objective 0.000000e+00, 126 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 52 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 241 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 247 - 0.00000 - - 2s 0 0 0.00000 0 279 - 0.00000 - - 4s 0 0 0.00000 0 288 - 0.00000 - - 5s 0 0 0.00000 0 288 - 0.00000 - - 5s 0 2 0.00000 0 288 - 0.00000 - - 6s Cutting planes: Clique: 123 Zero half: 1 Explored 31 nodes (37735 simplex iterations) in 7.72 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 18:53:53 2012 Optimize a model with 6941 rows, 1269 columns and 21159 nonzeros Presolve time: 0.02s Presolved: 6941 rows, 1269 columns, 21159 nonzeros Variable types: 0 continuous, 1269 integer (1269 binary) Root relaxation: objective 0.000000e+00, 126 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 60 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 219 - 0.00000 - - 1s 0 0 0.00000 0 225 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 2s 0 0 0.00000 0 149 - 0.00000 - - 3s 0 0 0.00000 0 240 - 0.00000 - - 4s 0 0 0.00000 0 168 - 0.00000 - - 5s 0 0 0.00000 0 152 - 0.00000 - - 6s 0 0 0.00000 0 187 - 0.00000 - - 6s 0 0 0.00000 0 152 - 0.00000 - - 7s 0 0 0.00000 0 127 - 0.00000 - - 8s 0 0 0.00000 0 202 - 0.00000 - - 9s 0 0 0.00000 0 156 - 0.00000 - - 10s 0 0 0.00000 0 189 - 0.00000 - - 11s 0 0 0.00000 0 128 - 0.00000 - - 11s 0 2 0.00000 0 128 - 0.00000 - - 12s 137 11 0.00000 14 156 - 0.00000 - 161 15s 500 14 0.00000 18 140 - 0.00000 - 150 20s 839 7 0.00000 10 150 - 0.00000 - 150 25s 1004 18 0.00000 0 283 - 0.00000 - 148 30s 1006 19 0.00000 0 192 - 0.00000 - 148 35s 1009 21 0.00000 0 202 - 0.00000 - 147 41s 1011 23 0.00000 0 180 - 0.00000 - 147 45s 1017 27 0.00000 16 194 - 0.00000 - 195 50s 1120 8 0.00000 26 162 - 0.00000 - 193 55s 1402 10 infeasible 26 - 0.00000 - 189 60s 1692 14 infeasible 28 - 0.00000 - 188 65s 1956 4 0.00000 24 172 - 0.00000 - 188 70s 2291 7 infeasible 26 - 0.00000 - 185 75s Cutting planes: Clique: 27 Zero half: 1 Explored 2369 nodes (500470 simplex iterations) in 76.20 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 10