fmolnar-notredame / analogsat

Simulations of continuous-time dynamical systems (CTDS) that solve Boolean satisfiability (SAT) problems.

AnalogSat

Simulations of continuous-time dynamical systems (CTDS) that solve Boolean satisfiability (SAT) problems or minimize the number of violated clauses (MAXSAT).

Corresponding publication:
"Accelerating a continuous-time SAT solver using GPUs",
F. Molnar, S. R. Kharel, X. S. Hu, Z. Toroczkai,
Computer Physics Communications, Volume 256, November 2020, 107469.
DOI: https://doi.org/10.1016/j.cpc.2020.107469

This work was supported in part by the National Science Foundation under Grants CCF-1644368, 1640081 and CNS1629914, and by the Nanoelectronics Research Corporation, a wholly-owned subsidiary of the Semiconductor Research Corporation, through Extremely Energy Efficient Collective Electronics, an SRC-NRI Nanoelectronics Research Initiative under Research Task ID 2698.004.

This software package contains 3 separate modules:

• (1) AnalogSat library
• (2) MiniSat for AnalogSat library
• (3) AnalogSat Frontend

Each module can be compiled and used on its own. Each module is licensed under GNU GPL v3. See the license file in the folders of each module.

The code needs NVIDIA CUDA Toolkit (minimum version 9.2) to compile, but its CPU-based solvers can be used without a CUDA-compatible GPU.

The AnalogSat library (1) is the core implementation of the Boolean satisfiability (SAT) solver described in the paper.

The MiniSat for AnalogSat library (2) is a modified version of the original MiniSat software by Niklas Een and Niklas Sorensson. It is based on the latest available version of MiniSat (version 2.2.0) on http://minisat.se. The purpose of the modifications is to make the MiniSat code accessible via the AnalogSat Frontend. In addition, linux-specific parts (linux-specific timing and interrupts) have been removed. The solving algorithm has not been modified.

The AnalogSat Frontend (3) is a command-line interface to run SAT problems through the solver. It also comes with predefined configurations that allow the user to recreate the results shown in the paper.

analogsat's Issues

Compilation Error

[On Linux] I compiled MiniSat and AnalogSat (the '.a' files are generated) but when I try compiling Frontend:

$./build.sh
...
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-5_bench_runner.o: in function `BenchRunner::RunMinisat()':
bench_runner.cpp:(.text+0x3b7): undefined reference to `Minisat::SolveWithMinisat(Minisat::MemoryCNF&, int, char**, std::function<bool ()>)'
/usr/bin/ld: bench_runner.cpp:(.text+0x449): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-5_bench_runner.o: in function `BenchRunner::RunMinisat() [clone .cold]':
bench_runner.cpp:(.text.unlikely+0x5e): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-6_cnf_runner.o: in function `SolveUsingMinisat(analogsat::SatProblem const&, Configuration const&, std::vector<double, std::allocator<double> >*)':
cnf_runner.cpp:(.text+0x244): undefined reference to `Minisat::SolveWithMinisat(Minisat::MemoryCNF&, int, char**, std::function<bool ()>)'
/usr/bin/ld: cnf_runner.cpp:(.text+0x32c): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-6_cnf_runner.o: in function `SolveUsingMinisat(analogsat::SatProblem const&, Configuration const&, std::vector<double, std::allocator<double> >*) [clone .cold]':
cnf_runner.cpp:(.text.unlikely+0x31): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-10_minisat_adapter.o: in function `analogsat::MinisatAdapter::~MinisatAdapter()':
minisat_adapter.cpp:(.text._ZN9analogsat14MinisatAdapterD2Ev[_ZN9analogsat14MinisatAdapterD5Ev]+0x25): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-10_minisat_adapter.o: in function `analogsat::MinisatAdapter::~MinisatAdapter()':
minisat_adapter.cpp:(.text._ZN9analogsat14MinisatAdapterD0Ev[_ZN9analogsat14MinisatAdapterD5Ev]+0x24): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-10_minisat_adapter.o: in function `analogsat::MinisatAdapter::MinisatAdapter(analogsat::SatProblem const&) [clone .cold]':
minisat_adapter.cpp:(.text.unlikely+0x12): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-10_minisat_adapter.o:(.data.rel.ro._ZTIN9analogsat14MinisatAdapterE[_ZTIN9analogsat14MinisatAdapterE]+0x10): undefined reference to `typeinfo for Minisat::MemoryCNF'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-12_ramsey_runner.o: in function `RamseyRunner::RunMinisat()':
ramsey_runner.cpp:(.text+0x67a): undefined reference to `Minisat::SolveWithMinisat(Minisat::MemoryCNF&, int, char**, std::function<bool ()>)'
/usr/bin/ld: ramsey_runner.cpp:(.text+0x810): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
/usr/bin/ld: /tmp/tmpxft_0033a356_00000000-12_ramsey_runner.o: in function `RamseyRunner::RunMinisat() [clone .cold]':
ramsey_runner.cpp:(.text.unlikely+0x2da): undefined reference to `Minisat::MemoryCNF::~MemoryCNF()'
collect2: error: ld returned 1 exit status

And:

$nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2021 NVIDIA Corporation
Built on Fri_Dec_17_18:16:03_PST_2021
Cuda compilation tools, release 11.6, V11.6.55
Build cuda_11.6.r11.6/compiler.30794723_0

running the command with '-v': https://pastebin.com/9twRB3b0
P.S. efforts to get it to compile with clang-14 have also failed.
Tried another (actually older cuda) worked, see: https://forums.developer.nvidia.com/t/compilation-linking-error/210349 for a dump comparison, because I'd still be happy to know what went wrong in the new nvcc.