current bounds on the number of colors: 0 -- 178 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:14 2012 Optimize a model with 76540 rows, 16700 columns and 244928 nonzeros Presolve time: 0.24s Presolved: 76540 rows, 16700 columns, 244928 nonzeros Variable types: 0 continuous, 16700 integer (16700 binary) Root relaxation: objective 0.000000e+00, 616 iterations, 0.06 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 (1001 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 -- 89 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:16 2012 Optimize a model with 37930 rows, 8690 columns and 121088 nonzeros Presolve time: 0.15s Presolved: 37930 rows, 8690 columns, 121088 nonzeros Variable types: 0 continuous, 8690 integer (8690 binary) Root relaxation: objective 0.000000e+00, 463 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 (820 simplex iterations) in 0.22 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 23:52:16 2012 Optimize a model with 19054 rows, 4774 columns and 60544 nonzeros Presolve time: 0.07s Presolved: 19054 rows, 4774 columns, 60544 nonzeros Variable types: 0 continuous, 4774 integer (4774 binary) Root relaxation: objective 0.000000e+00, 361 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 (660 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 23:52:17 2012 Optimize a model with 9616 rows, 2816 columns and 30272 nonzeros Presolve time: 0.03s Presolved: 9616 rows, 2816 columns, 30272 nonzeros Variable types: 0 continuous, 2816 integer (2816 binary) Root relaxation: objective 0.000000e+00, 370 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 (695 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 23:52:17 2012 Optimize a model with 4468 rows, 1748 columns and 13760 nonzeros Presolve time: 0.01s Presolved: 4468 rows, 1748 columns, 13760 nonzeros Variable types: 0 continuous, 1748 integer (1748 binary) Root relaxation: objective 0.000000e+00, 384 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 0 276 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4890 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:52:17 2012 Optimize a model with 1894 rows, 1214 columns and 5504 nonzeros Presolve removed 178 rows and 178 columns Presolve time: 0.00s Presolved: 1716 rows, 1036 columns, 5148 nonzeros Variable types: 0 continuous, 1036 integer (1036 binary) Root relaxation: objective 0.000000e+00, 185 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 0 178 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (744 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 23:52:17 2012 Optimize a model with 2752 rows, 1392 columns and 8256 nonzeros Presolve time: 0.01s Presolved: 2752 rows, 1392 columns, 8256 nonzeros Variable types: 0 continuous, 1392 integer (1392 binary) Root relaxation: objective 0.000000e+00, 410 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 0 354 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5012 simplex iterations) in 0.55 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 23:52:18 2012 Optimize a model with 3610 rows, 1570 columns and 11008 nonzeros Presolve time: 0.01s Presolved: 3610 rows, 1570 columns, 11008 nonzeros Variable types: 0 continuous, 1570 integer (1570 binary) Root relaxation: objective 0.000000e+00, 413 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 0 340 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 361 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 0 0.00000 0 304 - 0.00000 - - 2s 0 0 0.00000 0 294 - 0.00000 - - 2s 0 0 0.00000 0 292 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 3s 0 0 0.00000 0 276 - 0.00000 - - 3s 0 0 0.00000 0 268 - 0.00000 - - 4s 0 0 0.00000 0 285 - 0.00000 - - 4s 0 0 0.00000 0 287 - 0.00000 - - 5s 0 0 0.00000 0 269 - 0.00000 - - 5s 0 0 0.00000 0 276 - 0.00000 - - 5s 0 0 0.00000 0 276 - 0.00000 - - 6s 0 2 0.00000 0 276 - 0.00000 - - 6s 396 62 0.00000 11 429 - 0.00000 - 134 10s 606 97 0.00000 11 286 - 0.00000 - 127 15s 609 99 0.00000 11 262 - 0.00000 - 126 20s 613 102 0.00000 17 250 - 0.00000 - 126 26s 676 96 0.00000 26 306 - 0.00000 - 218 30s 955 13 0.00000 22 371 - 0.00000 - 224 35s Cutting planes: Gomory: 1 Zero half: 5 Explored 1065 nodes (294998 simplex iterations) in 37.17 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