Prototype implementation of a proof search algorithm for inductive predicate entailments.

• g++ 4.9.0
• Flex 2.5.35
• Bison 2.5
• CVC4 1.5
• CMake 3.5.1
• Doxygen (optional, for documentation)

The files containing the definitions of theories and logics, located in input/Theories and input/Logics, are required for handling the input scripts.

Some sample entailment inputs can be found in input\Entailments.

Depending on how you compiled and/or installed CVC4, you might need to do some changes such that inductor can use CVC4 as a library.

Case 1. If you installed CVC4 via sudo apt-get install or compiled it yourself and ran sudo make install, you don't need to change anything.

Case 2. If you compiled CVC4 and installed it via make install to a non-standard prefix, you need to:

• Open CMakeLists.txt, comment line 10 (with a #) and uncomment lines 13 and 14.
• Replace PATH-TO-CVC4-PREFIX with the actual path to your CVC4 prefix directory (2 occurrences).

Case 3. If you only compiled CVC4 without running any variant of make install, you need to:

• Open CMakeLists.txt, comment line 10 (with a #) and uncomment lines 17 and 18.
• Replace PATH-TO-CVC4 with the actual path to your CVC4 directory (5 occurrences).
• Open smtlib\cvc\cvc_interface.h, comment line 16 and uncomment line 19.
• Open smtlib\cvc\cvc_term_translator.h, comment line 16 and uncomment line 19.

To compile the files smtlib/parser/smtlib-bison-parser.y and smtlib/parser/smtlib-flex-lexer.l, go to the parser directory and run make. If these files are changed, they need to be recompiled.

.../smtlib/parser$ make

To erase the generated code, run make clean.

.../smtlib/parser$ make clean

(1) Before building the project, make sure the files smtlib/parser/smtlib-bison-parser.y.c, smtlib/parser/smtlib-bison-parser.y.h and smtlib/parser/smtlib-flex-lexer.l.c have been generated. If any of these files is missing, see section "Compiling the parser" above.

(2) Make sure you made the necessary changes required by your build and installation of CVC4. See section "Customization for CVC4" above for more details.

(3) Run cmake in the root directory of the project. This creates the Makefile necessary for compilation.

.../inductor$ cmake .

(4) Run make. This creates the executable inductor which can check entailments from a list of file inputs.

.../inductor$ make
.../inductor$ ./inductor --check-ent input_file_path1 input_file_path2 input_file_path3 ...

(5) As examples, here is how you would run the sample entailments in input/Entailments:

.../inductor$ ./inductor --check-ent input/Entailments/list-liseo.smt2
.../inductor$ ./inductor --check-ent input/Entailments/listp-list.smt2
.../inductor$ ./inductor --check-ent input/Entailments/lsa-ls.smt2
.../inductor$ ./inductor --check-ent input/Entailments/ls-lseo.smt2
.../inductor$ ./inductor --check-ent input/Entailments/lsp-ls.smt2

.../inductor$ doxygen

The documentation in html format is generated in the docs folder. Open the docs/index.html file in a browser.