current bounds on the number of colors: 0 -- 177 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:37 2012 Optimize a model with 71985 rows, 16392 columns and 231000 nonzeros Presolve time: 0.22s Presolved: 71985 rows, 16392 columns, 231000 nonzeros Variable types: 0 continuous, 16392 integer (16392 binary) Root relaxation: objective 0.000000e+00, 742 iterations, 0.08 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 (1113 simplex iterations) in 0.41 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 -- 88 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:38 2012 Optimize a model with 36081 rows, 8604 columns and 115500 nonzeros Presolve time: 0.15s Presolved: 36081 rows, 8604 columns, 115500 nonzeros Variable types: 0 continuous, 8604 integer (8604 binary) Root relaxation: objective 0.000000e+00, 556 iterations, 0.03 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 (963 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: 0 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:39 2012 Optimize a model with 18129 rows, 4710 columns and 57750 nonzeros Presolve time: 0.07s Presolved: 18129 rows, 4710 columns, 57750 nonzeros Variable types: 0 continuous, 4710 integer (4710 binary) Root relaxation: objective 0.000000e+00, 436 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 (789 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:39 2012 Optimize a model with 9153 rows, 2763 columns and 28875 nonzeros Presolve time: 0.03s Presolved: 9153 rows, 2763 columns, 28875 nonzeros Variable types: 0 continuous, 2763 integer (2763 binary) Root relaxation: objective 0.000000e+00, 376 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 (677 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:40 2012 Optimize a model with 4257 rows, 1701 columns and 13125 nonzeros Presolve time: 0.01s Presolved: 4257 rows, 1701 columns, 13125 nonzeros Variable types: 0 continuous, 1701 integer (1701 binary) Root relaxation: objective 0.000000e+00, 389 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 0 334 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 2 Zero half: 27 Explored 0 nodes (6640 simplex iterations) in 0.66 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:40 2012 Optimize a model with 1809 rows, 1170 columns and 5250 nonzeros Presolve removed 177 rows and 177 columns Presolve time: 0.00s Presolved: 1632 rows, 993 columns, 4896 nonzeros Variable types: 0 continuous, 993 integer (993 binary) Root relaxation: objective 0.000000e+00, 188 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 0 177 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (786 simplex iterations) in 0.02 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:40 2012 Optimize a model with 2625 rows, 1347 columns and 7875 nonzeros Presolve time: 0.01s Presolved: 2625 rows, 1347 columns, 7875 nonzeros Variable types: 0 continuous, 1347 integer (1347 binary) Root relaxation: objective 0.000000e+00, 396 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 0 352 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 446 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 17 Zero half: 887 Explored 0 nodes (8694 simplex iterations) in 1.05 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:28:41 2012 Optimize a model with 3441 rows, 1524 columns and 10500 nonzeros Presolve time: 0.01s Presolved: 3441 rows, 1524 columns, 10500 nonzeros Variable types: 0 continuous, 1524 integer (1524 binary) Root relaxation: objective 0.000000e+00, 396 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 0 342 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 403 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 278 - 0.00000 - - 2s 0 0 0.00000 0 272 - 0.00000 - - 2s 0 0 0.00000 0 278 - 0.00000 - - 2s 0 0 0.00000 0 260 - 0.00000 - - 3s 0 0 0.00000 0 266 - 0.00000 - - 3s 0 0 0.00000 0 266 - 0.00000 - - 3s 0 2 0.00000 0 266 - 0.00000 - - 4s 126 37 0.00000 20 368 - 0.00000 - 128 5s 610 58 0.00000 9 275 - 0.00000 - 95.3 10s 614 61 0.00000 20 352 - 0.00000 - 94.7 15s 621 65 infeasible 11 - 0.00000 - 174 20s 769 82 0.00000 24 346 - 0.00000 - 173 25s 1125 103 infeasible 25 - 0.00000 - 183 30s 1476 112 0.00000 17 312 - 0.00000 - 191 35s 1836 154 infeasible 24 - 0.00000 - 194 40s 2137 115 infeasible 24 - 0.00000 - 202 45s 2460 84 infeasible 30 - 0.00000 - 206 50s 2764 60 infeasible 24 - 0.00000 - 210 55s 3209 103 0.00000 22 327 - 0.00000 - 206 60s 3619 87 infeasible 27 - 0.00000 - 207 65s 4034 86 infeasible 23 - 0.00000 - 206 70s 4411 97 infeasible 29 - 0.00000 - 206 75s 4766 90 infeasible 28 - 0.00000 - 207 80s 5119 101 infeasible 22 - 0.00000 - 208 85s 5439 99 infeasible 23 - 0.00000 - 209 90s 5775 87 0.00000 21 318 - 0.00000 - 211 95s 6156 70 0.00000 18 394 - 0.00000 - 211 100s 6502 72 0.00000 25 397 - 0.00000 - 212 105s 6873 49 infeasible 27 - 0.00000 - 211 110s 7210 36 infeasible 26 - 0.00000 - 212 115s 7546 26 0.00000 18 316 - 0.00000 - 213 120s 7870 16 infeasible 23 - 0.00000 - 214 125s Cutting planes: Zero half: 20 Explored 8127 nodes (1772834 simplex iterations) in 128.71 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5