adds model generation for strings, and a hacked way in arith engine for models
optimizing model generation for strings
fix loop detection for multi-vars
for morgan to see the regression problems
fix the infinite issue
removes unsound cases, adds unrolling
adds model generation for strings, and a hacked way in arith engine for models
optimizing model generation for strings
fix loop detection for multi-vars
for morgan to see the regression problems
fix the infinite issue
removes unsound cases, adds unrolling
Merge branch 'master' of github.com:tiliang/CVC4
Add new symmetry breaking technique for finite model finding.  Improvements to bounded integer quantifier instantiation.
adds communication with arith engine
Merge branch 'master' of github.com:tiliang/CVC4
Some fixes to recent strings commits.
Bug fixes and improvements for symmetry breaking, it now supports multiple sorts.  Working on monotonicity inference.
fixed a loop bug
add x=y