--- Job rgn Start 08/24/08 06:44:41 GAMS Rev 227 Copyright (C) 1987-2008 GAMS Development. All rights reserved Licensee: Stefan Vigerske G071106/0001CB-LNX Humboldt University Berlin, Numerical Mathematics DC5918 --- Starting compilation --- rgn.gms(106) 2 Mb --- GDXin=/home/stefan/work/gams/models/LINlib/rgn.gdx --- rgn.gms(148) 3 Mb --- Starting execution: elapsed 0:00:00.005 --- rgn.gms(123) 4 Mb --- Generating MIP model m --- rgn.gms(124) 4 Mb --- 25 rows 181 columns 541 non-zeroes --- 100 discrete-columns --- Executing Cbc: elapsed 0:00:00.009 GAMS/Cbc 2.1 LP/MIP Solver written by J. Forrest Problem statistics: 180 columns and 24 rows. 100 variables have integrality restrictions. Calling CBC main solution routine... Coin Cbc and Clp Solver version 2.20.00, build Aug 23 2008 command line - GAMS/CBC -solve -quit Continuous objective value is 48.8 - 0.00 seconds Optimal - objective value 48.8 4 inequality constraints converted to equality constraints 4 SOS with 104 members processed model has 24 rows, 184 columns (104 integer) and 464 elements Pass 1: suminf. 0.00000 (0) obj. 137.2 iterations 27 Solution found of 137.2 Before mini branch and bound, 89 integers at bound fixed and 52 continuous Full problem 24 rows 184 columns, reduced to 24 rows 43 columns Mini branch and bound did not improve solution (0.00 seconds) Round again with cutoff of 128.36 Reduced cost fixing fixed 3 variables on major pass 2 Pass 2: suminf. 0.00000 (0) obj. 100.8 iterations 30 Solution found of 100.8 Before mini branch and bound, 89 integers at bound fixed and 50 continuous Full problem 24 rows 184 columns, reduced to 24 rows 45 columns Mini branch and bound improved solution from 100.8 to 100.8 (0.01 seconds) Freeing continuous variables gives a solution of 85.8 After 0.01 seconds - Feasibility pump exiting with objective of 85.8 - took 0.01 seconds Integer solution of 85.8 found by feasibility pump after 0 iterations and 0 nodes (0.01 seconds) Full problem 24 rows 184 columns, reduced to 20 rows 80 columns 26 added rows had average density of 44.9231 At root node, 26 cuts changed objective from 48.8 to 68.7204 in 100 passes Cut generator 0 (Probing) - 5 row cuts, 0 column cuts (1 active) in 1.024 seconds - new frequency is 4 Cut generator 1 (Gomory) - 1300 row cuts, 0 column cuts (23 active) in 0.036 seconds - new frequency is 1 Cut generator 2 (Knapsack) - 0 row cuts, 0 column cuts (0 active) in 0.024 seconds - new frequency is -100 Cut generator 3 (Clique) - 0 row cuts, 0 column cuts (0 active) in 0.000 seconds - new frequency is -100 Cut generator 4 (MixedIntegerRounding2) - 233 row cuts, 0 column cuts (2 active) in 0.004 seconds - new frequency is 1 Cut generator 5 (FlowCover) - 0 row cuts, 0 column cuts (0 active) in 0.152 seconds - new frequency is -100 Cut generator 6 (TwoMirCuts) - 253 row cuts, 0 column cuts (0 active) in 0.020 seconds - new frequency is -100 Optimal - objective value 68.7204 Optimal - objective value 68.7204 After 0 nodes, 1 on tree, 85.8 best solution, best possible 68.7204 (1.40 seconds) Integer solution of 82.2 found after 3220 iterations and 48 nodes (1.56 seconds) Full problem 24 rows 184 columns, reduced to 20 rows 84 columns Strong branching is fixing too many variables, too expensively! Search completed - best objective 82.19999923999998, took 17289 iterations and 988 nodes (4.16 seconds) Strong branching done 3488 times (21723 iterations), fathomed 356 nodes and fixed 120 variables Maximum depth 16, 1347 variables fixed on reduced cost Cuts at root node changed objective from 48.8 to 68.7204 Probing was tried 547 times and created 76 cuts of which 43 were active after adding rounds of cuts (1.120 seconds) Gomory was tried 1879 times and created 6357 cuts of which 1826 were active after adding rounds of cuts (0.268 seconds) Knapsack was tried 100 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.024 seconds) Clique was tried 100 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.000 seconds) MixedIntegerRounding2 was tried 1879 times and created 1369 cuts of which 286 were active after adding rounds of cuts (0.148 seconds) FlowCover was tried 100 times and created 0 cuts of which 0 were active after adding rounds of cuts (0.152 seconds) TwoMirCuts was tried 100 times and created 253 cuts of which 0 were active after adding rounds of cuts (0.020 seconds) implication was tried 1779 times and created 0 cuts of which 0 were active after adding rounds of cuts Result - Finished objective 82.19999923999998 after 988 nodes and 17289 iterations - took 4.16 seconds (total time 4.16) Total time 4.16 Solved to optimality. MIP solution: 82.19999924 (988 nodes, 4.16 seconds) Best possible: 82.19999924 Absolute gap: 0 (absolute tolerance optca: 0) Relative gap: 0 (relative tolerance optcr: 0) --- Restarting execution --- rgn.gms(124) 0 Mb --- Reading solution for model m *** Status: Normal completion --- Job rgn.gms Stop 08/24/08 06:44:46 elapsed 0:00:04.472