[Clp] Clp hangs on some test files

[Yann COLLETTE]

Hello,

I use clp from trunk on fedora 20 64 bits.

I noticed that with 2 mps files shipped in the clp source distribution 
clp hangs.

- with spec-section.mps:

command line - 
/home/collette/repositories/github/CoinOR/Clp/build/bin/clp 
../Data/Sample/spec_sections.mps -solve
At line 8 NAME
At line 9 ROWS
At line 12 COLUMNS
At line 32 RHS
At line 34 RANGES
At line 36 BOUNDS
At line 39 SOS
At line 46 QUADOBJ
Problem no_name has 1 rows, 15 columns and 15 elements
At line 50 CSECTION      cone1       0.0          QUAD
Model was imported from ./../Data/Sample/spec_sections.mps in 0 seconds
Presolve 1 (0) rows, 7 (-8) columns and 7 (-8) elements
0  Obj 0 Primal inf 798 (1) Dual inf 5.999994 (6)
1  Obj 0
Optimal - objective value 0
0  Obj 2.2288938e+08 Dual inf 2633496.5 (5)
****** th 4.49423e+306 simple -inf
****** th 5.99231e+306 simple -inf
clp: 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSimplexNonlinear.cpp:2117: 
int ClpSimplexNonlinear::pivotColumn(CoinIndexedVector*, 
CoinIndexedVector*, CoinIndexedVector*, CoinIndexedVector*, int&, 
double&, double*): Assertion `theta_ < 1.0e30' failed.

Program received signal SIGABRT, Aborted.
0x0000003ffa835877 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install 
atlas-3.8.4-13.fc20.x86_64 bzip2-libs-1.0.6-9.fc20.x86_64 
glibc-2.18-16.fc20.x86_64 libgcc-4.8.3-7.fc20.x86_64 
libgfortran-4.8.3-7.fc20.x86_64 libquadmath-4.8.3-7.fc20.x86_64 
libstdc++-4.8.3-7.fc20.x86_64 zlib-1.2.8-3.fc20.x86_64
(gdb) where
#0  0x0000003ffa835877 in raise () from /lib64/libc.so.6
#1  0x0000003ffa836f68 in abort () from /lib64/libc.so.6
#2  0x0000003ffa82e7d6 in __assert_fail_base () from /lib64/libc.so.6
#3  0x0000003ffa82e882 in __assert_fail () from /lib64/libc.so.6
#4  0x00000000004c6143 in ClpSimplexNonlinear::pivotColumn 
(this=0x9d7cd0, longArray=0x9e2e00, rowArray=0x9d98b0, 
columnArray=0x9e32d0, spare=0x9d8a60, pivotMode=@0x7fffffff1964: 14, 
solutionError=@0x7fffffff18b0: 0, dArray=0x9e4bb0)
     at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSimplexNonlinear.cpp:2117
#5  0x00000000004c08a9 in ClpSimplexNonlinear::whileIterating 
(this=0x9d7cd0, pivotMode=@0x7fffffff1964: 14) at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSimplexNonlinear.cpp:664
#6  0x00000000004be4e1 in ClpSimplexNonlinear::primal (this=0x9d7cd0) at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSimplexNonlinear.cpp:167
#7  0x0000000000482693 in ClpSimplex::reducedGradient (this=0x9d7cd0, 
phase=0) at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSimplex.cpp:6086
#8  0x000000000048096c in ClpSimplex::primal (this=0x9d7cd0, 
ifValuesPass=1, startFinishOptions=0) at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSimplex.cpp:5665
#9  0x0000000000517ebe in ClpSimplex::initialSolve (this=0x9c97a8, 
options=...) at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSolve.cpp:2371
#10 0x0000000000606d45 in ClpMain1 (argc=3, argv=0x7fffffffdc08, 
models=0x9c97a8) at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSolver.cpp:1048
#11 0x0000000000466316 in main (argc=3, argv=0x7fffffffdc08) at 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpMain.cpp:215


- with conic.mps:

Coin LP version 1.15.6, build Dec 31 2014
command line - 
/home/collette/repositories/github/CoinOR/Clp/build/bin/clp 
../Data/Sample/conic.mps -solve
At line 1 NAME
At line 2 ROWS
At line 5 COLUMNS
At line 25 RHS
At line 27 RANGES
At line 29 BOUNDS
At line 32 SOS
At line 39 QUADOBJ
Problem no_name has 1 rows, 15 columns and 15 elements
At line 43 CSECTION      cone1       0.0          QUAD
Model was imported from ./../Data/Sample/conic.mps in 0.000788 seconds
Presolve 1 (0) rows, 7 (-8) columns and 7 (-8) elements
0  Obj 0 Primal inf 798 (1) Dual inf 5.999994 (6)
1  Obj 0
Optimal - objective value 0
0  Obj 2.2288938e+08 Dual inf 2633496.5 (5)
****** th 4.49423e+306 simple -inf
****** th 5.99231e+306 simple -inf
clp: 
/home/collette/repositories/github/CoinOR/Clp/Clp/src/ClpSimplexNonlinear.cpp:2117: 
int ClpSimplexNonlinear::pivotColumn(CoinIndexedVector*, 
CoinIndexedVector*, CoinIndexedVector*, CoinIndexedVector*, int&, 
double&, double*): Assertion `theta_ < 1.0e30' failed.

Program received signal SIGABRT, Aborted.
0x0000003ffa835877 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install 
atlas-3.8.4-13.fc20.x86_64 bzip2-libs-1.0.6-9.fc20.x86_64 
glibc-2.18-16.fc20.x86_64 libgcc-4.8.3-7.fc20.x86_64 
libgfortran-4.8.3-7.fc20.x86_64 libquadmath-4.8.3-7.fc20.x86_64 
libstdc++-4.8.3-7.fc20.x86_64 zlib-1.2.8-3.fc20.x86_64

Best regards,

YC