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fastsynth

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Compilation instructions

Clone the repo

git clone git@github.com:kroening/fastsynth.git
cd fastsynth
git submodule init
git submodule update

compile the CBMC submodule (in fastsynth/lib/cbmc) by following these instructions: https://github.com/diffblue/cbmc/blob/develop/COMPILING.md

Finally, to compile fastsynth run make from the dir fastsynth/src

Usage

The fastsynth binary is located in fastsynth/src/fastsynth.

SyGuS-IF format

Fastsynth can be run on SyGuS-IF format synthesis benchmarks in bitvector logic. In theory it can also be run on Linear Integer Arithmetic but this is less thoroughly tested. To run fastsynth the command is

fastsynth file.sl [--command-line-parameters]

A description of the available command line parameters can be obtained by running fastsynth --help.

By default, with no command line parameters, fastsynth runs a basic CEGIS algorithm using a SAT solver for both verification and synthesis.

annotated C format

In addition to SyGuS-IF, fastsynth also accepts synthesis problems in a formated based on annotating C files. Examples can be found in fastsynth/regression/fastsynth-C.

  • Any function to be synthesised must be named with the prefix EXPRESSION.
  • Any input to the function must be initialised with a nondet function, prefixed with nondet.
  • The logical constraints must be given using __CPROVER_assert.

Note that integers in C are not true integers but integers represented using bitvectors.

int EXPRESSION_and(int, int);
int nondet_int();

int main()
{
  int in0=nondet_int(),
      in1=nondet_int();
  __CPROVER_assert(EXPRESSION_and(in0, in1)==(in0 & in1), "");
}

To run fastsynth the command is the same as with the SyGuS-IF format, and the available command line parameters remain the same.

fastsynth file.c [--command-line-parameters]