PyVCG 1.0.7

Description:

PyVCG 1.0.7

Verification Condition Generator
PyVCG is a utility library to generate VCs directly for
CVC5 or standard-compliant
SMTLIB2. The interface is deliberately
generic and it should be easy to add API support for other solvers in
the future.
This is pretty limited for now as the initial target is the expression
language of TRLC.
Please refer to the Changelog for what's new.
Features
This library provides a wrapper around SMTLIB with some additional
features:

SMTLIB Scripts
Automatic (minimal) logic discovery
Basic sorts: Bool,
Int,
Real, and
String
Parametric sorts:
Sequences
Datatype sorts: Enumerations and Records
Uninterpreted functions
Quantifiers
Boolean expressions: not, and, or, xor, implication
If-then-else expressions
Comparisons: =, <, >, <=, >=
Int -> Real conversion
Real -> Int conversion (smtlib rounding (round-to-negative) and
arithmetic rounding (round-nearest-away))
Unary arithmetic: -, abs
Binary Int arithmetic: +, -, *, smtlib div, smtlib mod, python div,
ada remainder
Binary Real arithmetic: +, -, *, /
String operations: length, contains, prefix, suffix, concatenation
Sequence operations: length, contains, access, concatenation
Record operations: access

In addition this library provides a graph to build VCs with multiple
paths; and generating VCs for all paths. FastWP and higher-level
modelling for language features (e.g. ite, loops) are planned later.
Drivers
Current support for outputs:

SMTLIB (for writing and debugging)
CVC5 API (for solving)

Dependencies
Run-time

Python >= 3.8
cvc5

Development

GNU Make
coverage
pycodestyle
pylint

Copyright & License
The sole copyright holder is Florian Schanda.
This library is licensed under the GNU GPL version 3 (or
later).