Benchmark

non-incremental/QF_BV/brummayerbiere/nlzbsdown064.smt2 

Number of leading zeros nlz(x) algorithm, binary search, counting down
From the book "Hacker's delight" by Henry S. Warren, Jr., page 78
We cross-check it with an obvious method of counting leading zeros:

s = 0;
for (i = BW - 1; i >= 0; i--)
  if (x & (1 << i))
    break;
  else
    s++;

Contributed by Robert Brummayer (robert.brummayer@gmail.com)
Benchmark
Size18818
Compressed Size2175
License Creative Commons Attribution 4.0 International (CC-BY-4.0)
Categorycrafted
First Occurrence2008-07-07
Generated By—
Generated On—
Generator—
Dolmen OK1
strict Dolmen OK1
check-sat calls1
Query 1
Status unsat
Inferred Status unsat
Size 18810
Compressed Size2190
Max. Term Depth154
Asserts 1
Declared Functions0
Declared Constants1
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite211 not7 =206 let144
bvnot65 bvand64 bvor64 bvadd64
bvsub7 bvshl64 bvlshr6 zero_extend64

Evaluations

Evaluation Rating Solver Variant Result Wallclock CPU Time
SMT Evaluation 2013 4Simp 4Simp-SMT-COMP-2012 default unsat ✅ 0.22679 —
Abziz abziz_portfolio_2011_minfeatures_2 default unsat ✅ 0.13697 —
abziz_portfolio_2011_solvers_2 default unsat ✅ 0.15604 —
abziz_portfolio_2012_minfeatures default unsat ✅ 0.13547 —
abziz_portfolio_2012_solvers default unsat ✅ 0.13664 —
AbzizPortfolio-SMT-COMP-2012 default unsat ✅ 0.13583 —
Boolector Boolector-1.5.118-SMT-EVAL-2013 default unsat ✅ 0.76948 —
Boolector-SMT-COMP-2011 default unsat ✅ 0.66830 —
Boolector-SMT-COMP-2012 default unsat ✅ 1.13789 —
CVC3 CVC3-SMT-COMP-2010 default unsat ✅ 81.65740 —
CVC3-SMT-COMP-2011 default unsat ✅ 77.43690 —
CVC3-SMT-COMP-2012 default unsat ✅ 78.26540 —
CVC4 CVC4-SMT-COMP-2012-Resubmission default unsat ✅ 0.63014 —
CVC4-SMT-EVAL-2013 default unsat ✅ 1.14168 —
MathSAT MathSAT5-5.2.6-SMT-EVAL-2013 default unsat ✅ 2.92762 —
MathSAT5-HeavyBV-SMT-COMP-2012 default unsat ✅ 4.40583 —
MathSAT5-SMT-COMP-2011 default unsat ✅ 2.32084 —
MathSAT5-SMT-COMP-2012 default unsat ✅ 2.28836 —
SONOLAR SONOLAR-2013-05-15-SMT-EVAL-2013 default unsat ✅ 0.13293 —
SONOLAR-SMT-COMP-2010 default unsat ✅ 1.10813 —
SONOLAR-SMT-COMP-2011 default unsat ✅ 0.20931 —
SONOLAR-SMT-COMP-2012 default unsat ✅ 0.20915 —
STP STP2-SMT-COMP-2011 default unsat ✅ 0.13081 —
STP2-SMT-COMP-2012 default unsat ✅ 0.20542 —
simplifyingSTP-SMT-COMP-2010 default unsat ✅ 0.23362 —
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-EVAL-2013 default unsat ✅ 0.14216 —
Z3-SMT-COMP-2011 default unsat ✅ 0.13458 —
SMT-COMP 2014 4Simp 4Simp - 2014 default unsat ✅ 0.15204 0.14298
Abziz abziz_portfolio_all_features default unsat ✅ 0.27665 0.26296
abziz_portfolio_min_features default unsat ✅ 0.28017 0.26296
Boolector Boolector boolector unsat ✅ 0.63083 0.61890
CVC4 CVC4 f7118b2 default unsat ✅ 1.24689 2.44563
MathSAT MathSAT-5.2.12-Main default unsat ✅ 3.00293 2.99554
SONOLAR sonolar_smtcomp-2014 default unsat ✅ 0.14609 0.13498
STP stp-cryptominisat4 default unsat ✅ 0.15551 0.14698
Yices2 Yices-2.2.1-smtcomp2014 default unsat ✅ 0.14164 0.13298
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-COMP-2014 default unsat ✅ 0.15028 0.14298
SMT-COMP 2015 Boolector Boolector SMT15 QF_BV final boolector_qf_bv unsat ✅ 1.12226 1.12183
CVC4 CVC4-master-2015-06-15-9b32405-main default unsat ✅ 1.32779 2.63160
CVC4-experimental-2015-06-15-ff5745a-main default unsat ✅ 1.27305 2.51762
MathSAT MathSat 5.3.6 main smtcomp2015_main unsat ✅ 1.77967 1.77973
SMT-RAT SMT-RAT-final default unsat ✅ 79.80700 79.82290
STP stp-cryptominisat4 default unsat ✅ 0.14630 0.14498
stp-cmsat4-v15 default unsat ✅ 0.14012 0.13898
stp-cmsat4-mt-v15 default unknown ❌ 0.11825 0.11698
stp-minisat-v15 default unsat ✅ 0.14937 0.14798
Yices2 Yices default unsat ✅ 0.13430 0.13298
Z3 z3 4.4.0 default unsat ✅ 0.18131 0.18097
SMT-COMP 2016 ABC ABC_default default_abc unsat ✅ 0.22522 0.22601
ABC_glucose glucose unsat ✅ 0.79820 0.79817
Boolector Boolector boolector unsat ✅ 1.49699 1.49779
Boolector preprop boolector unsat ✅ 1.51036 1.51102
CVC4 CVC4-master-2016-05-27-cfef263-main default unsat ✅ 1.42092 2.81885
MapleSTP MapleSTP default unsat ✅ 0.18863 0.18870
MapleSTP-mt default unsat ✅ 0.20790 0.53260
MathSAT mathsat-5.3.11-linux-x86_64-Main default unsat ✅ 1.61680 1.61854
MinkeyRink Minkeyrink 2016 default unsat ✅ 0.62387 0.81617
Q3B Q3B default unsat ✅ 0.25555 0.15329
STP stp-cms-exp-2016 default unsat ✅ 0.20200 0.20277
stp-cms-mt-2016 default unsat ✅ 0.21719 0.56910
stp-cms-st-2016 default unsat ✅ 0.19820 0.19828
stp-minisat-st-2016 default unsat ✅ 0.45465 0.45507
Yices2 Yices-2.4.2 default unsat ✅ 0.07874 0.07874
Z3 z3-4.4.1 default unsat ✅ 0.15967 0.16097
SMT-COMP 2017 Boolector Boolector+CaDiCaL SMT17 final boolector unsat ✅ 1.10362 0.78199
Boolector SMT17 final boolector unsat ✅ 2.03815 2.02639
CVC4 CVC4-smtcomp2017-main default unsat ✅ 1.44127 2.85275
MathSAT mathsat-5.4.1-linux-x86_64-Main default unsat ✅ 2.32220 2.32215
MinkeyRink MinkeyRink 2017.3a default unsat ✅ 0.65648 0.24680
Q3B Q3B default unsat ✅ 0.51174 0.13991
STP stp_st default unsat ✅ 0.47610 0.24880
stp_mt default unsat ✅ 0.28540 0.51993
Yices2 Yices2-Main default unsat ✅ 0.08455 0.08388
Z3 z3-4.5.0 default unsat ✅ 0.16274 0.16180
SMT-COMP 2018 Boolector Boolector_default unsat ✅ 0.61473 0.61462
CVC4 master-2018-06-10-b19c840-competition-default_default unsat ✅ 2.39294 2.39290
MathSAT mathsat-5.5.2-linux-x86_64-Main_default unsat ✅ 1.58280 1.58366
MinkeyRink Minkeyrink MT_mt unsat ✅ 0.16792 0.29844
Minkeyrink ST_st unsat ✅ 0.16872 0.16848
STP STP-CMS-st-2018_default-no-stderr unsat ✅ 0.17250 0.17255
STP-CMS-mt-2018_multicore-no-stderr unsat ✅ 0.18093 0.35249
STP-Riss-st-2018_riss-no-stderr unsat ✅ 0.43125 0.43138
Yices2 Yices 2.6.0_default unsat ✅ 0.07819 0.07813
Z3 z3-4.7.1_default unsat ✅ 0.16139 0.16122
SMT-COMP 2021 Bitwuzla Bitwuzla-fixed_default unsat ✅ 0.77471 0.77191
MathSAT mathsat-5.6.6_default unsat ✅ 2.48070 2.48057
STP STP 2021.0_default unsat ✅ 0.16097 0.31700
Z3 z3-4.8.11_default unsat ✅ 0.16844 0.16839
SMT-COMP 2022 Bitwuzla Bitwuzla-fixed_default unsat ✅ 0.87945 0.87936
Bitwuzla-wrapped_default unsat ✅ 0.88901 0.88897
cvc5 cvc5-default-2022-07-02-b15e116-wrapped_sq unsat ✅ 5.58480 5.57917
MathSAT MathSAT-5.6.8_default unsat ✅ 3.08143 3.07991
STP STP 2022.4_default unsat ✅ 0.41068 0.41067
Yices2 Yices 2.6.2 for SMTCOMP 2021_default unsat ✅ 0.10052 0.10049
Z3++BV z3++bv_0702_default unsat ✅ 0.36333 0.36330
Z3 z3-4.8.17_default unsat ✅ 0.18636 0.18796
SMT-COMP 2024 0.17 (5/6) Bitwuzla Bitwuzla unsat ✅ 0.40111 0.30159
cvc5 cvc5 unsat ✅ 4.83653 4.73420
SMTInterpol SMTInterpol unknown ❌ 1201.71750 1203.15132
STP STP unsat ✅ 0.35214 0.25255
Yices2 Yices2 unsat ✅ 0.31307 0.21315
Z3alpha Z3-alpha unsat ✅ 0.71441 0.61477