current bounds on the number of colors: 0 -- 181 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:37:03 2012 Optimize a model with 75691 rows, 17129 columns and 242820 nonzeros Presolve time: 0.24s Presolved: 75691 rows, 17129 columns, 242820 nonzeros Variable types: 0 continuous, 17129 integer (17129 binary) Root relaxation: objective 0.000000e+00, 653 iterations, 0.07 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 (1033 simplex iterations) in 0.40 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 -- 90 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:37:05 2012 Optimize a model with 37936 rows, 8984 columns and 121410 nonzeros Presolve time: 0.15s Presolved: 37936 rows, 8984 columns, 121410 nonzeros Variable types: 0 continuous, 8984 integer (8984 binary) Root relaxation: objective 0.000000e+00, 490 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 (861 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 01:37:05 2012 Optimize a model with 18639 rows, 4821 columns and 59356 nonzeros Presolve time: 0.07s Presolved: 18639 rows, 4821 columns, 59356 nonzeros Variable types: 0 continuous, 4821 integer (4821 binary) Root relaxation: objective 0.000000e+00, 373 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 (709 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 Sat Dec 15 01:37:06 2012 Optimize a model with 9410 rows, 2830 columns and 29678 nonzeros Presolve time: 0.03s Presolved: 9410 rows, 2830 columns, 29678 nonzeros Variable types: 0 continuous, 2830 integer (2830 binary) Root relaxation: objective 0.000000e+00, 391 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 (716 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 Sat Dec 15 01:37:06 2012 Optimize a model with 4376 rows, 1744 columns and 13490 nonzeros Presolve time: 0.01s Presolved: 4376 rows, 1744 columns, 13490 nonzeros Variable types: 0 continuous, 1744 integer (1744 binary) Root relaxation: objective 0.000000e+00, 411 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 0 154 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3762 simplex iterations) in 0.26 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 Sat Dec 15 01:37:06 2012 Optimize a model with 1859 rows, 1201 columns and 5396 nonzeros Presolve removed 181 rows and 181 columns Presolve time: 0.00s Presolved: 1678 rows, 1020 columns, 5034 nonzeros Variable types: 0 continuous, 1020 integer (1020 binary) Root relaxation: objective 0.000000e+00, 195 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 0 181 - 0.00000 - - 0s Explored 0 nodes (761 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 Sat Dec 15 01:37:06 2012 Optimize a model with 2698 rows, 1382 columns and 8094 nonzeros Presolve time: 0.01s Presolved: 2698 rows, 1382 columns, 8094 nonzeros Variable types: 0 continuous, 1382 integer (1382 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 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 483 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 34 Zero half: 1013 Explored 0 nodes (8094 simplex iterations) in 1.07 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 Sat Dec 15 01:37:07 2012 Optimize a model with 3537 rows, 1563 columns and 10792 nonzeros Presolve time: 0.01s Presolved: 3537 rows, 1563 columns, 10792 nonzeros Variable types: 0 continuous, 1563 integer (1563 binary) Root relaxation: objective 0.000000e+00, 399 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 0 350 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 408 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 284 - 0.00000 - - 2s 0 0 0.00000 0 284 - 0.00000 - - 2s 0 0 0.00000 0 278 - 0.00000 - - 2s 0 0 0.00000 0 264 - 0.00000 - - 3s 0 0 0.00000 0 258 - 0.00000 - - 3s 0 0 0.00000 0 252 - 0.00000 - - 3s 0 0 0.00000 0 254 - 0.00000 - - 4s 0 0 0.00000 0 252 - 0.00000 - - 4s 0 0 0.00000 0 246 - 0.00000 - - 4s 0 0 0.00000 0 251 - 0.00000 - - 5s 0 0 0.00000 0 251 - 0.00000 - - 5s 0 2 0.00000 0 251 - 0.00000 - - 6s 392 33 0.00000 14 405 - 0.00000 - 127 10s 616 42 0.00000 18 296 - 0.00000 - 130 15s 620 45 0.00000 12 260 - 0.00000 - 129 20s 624 48 0.00000 17 240 - 0.00000 - 128 25s 628 50 0.00000 13 379 - 0.00000 - 127 30s 701 47 0.00000 20 378 - 0.00000 - 243 35s 951 23 0.00000 18 393 - 0.00000 - 246 40s 1186 22 0.00000 24 381 - 0.00000 - 251 45s 1403 17 0.00000 19 322 - 0.00000 - 256 50s 1627 3 0.00000 20 306 - 0.00000 - 259 55s Cutting planes: Zero half: 26 Explored 1637 nodes (473424 simplex iterations) in 55.19 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