Benchmark

non-incremental/QF_BV/brummayerbiere/nlzbe064.smt2 

Number of leading zeros nlz(x) algorithm, working both ends at the same time
From the book "Hacker's delight" by Henry S. Warren, Jr., page 79
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
Size30731
Compressed Size3151
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 30723
Compressed Size3165
Max. Term Depth203
Asserts 1
Declared Functions0
Declared Constants2
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite358 not1 =326 let191
bvnot65 bvand64 bvor128 bvadd95
bvsub33 bvslt33 bvshl96 bvashr32
zero_extend64

Evaluations

Evaluation Rating Solver Variant Result Wallclock CPU Time
SMT Evaluation 2013 0.11 (8/9) 4Simp 4Simp-SMT-COMP-2012 default unsat ✅ 0.43363 —
Abziz abziz_portfolio_2011_minfeatures_2 default unsat ✅ 0.22899 —
abziz_portfolio_2011_solvers_2 default unsat ✅ 0.23350 —
abziz_portfolio_2012_minfeatures default unsat ✅ 0.23240 —
abziz_portfolio_2012_solvers default unsat ✅ 0.22888 —
AbzizPortfolio-SMT-COMP-2012 default unsat ✅ 0.23244 —
Boolector Boolector-1.5.118-SMT-EVAL-2013 default unsat ✅ 1.44498 —
Boolector-SMT-COMP-2011 default unsat ✅ 3.21105 —
Boolector-SMT-COMP-2012 default unsat ✅ 2.56707 —
CVC3 CVC3-SMT-COMP-2010 default unknown ❌ 394.73200 —
CVC3-SMT-COMP-2011 default unknown ❌ — —
CVC3-SMT-COMP-2012 default unknown ❌ — —
CVC4 CVC4-SMT-COMP-2012-Resubmission default unsat ✅ 0.82443 —
CVC4-SMT-EVAL-2013 default unsat ✅ 11.33320 —
MathSAT MathSAT5-5.2.6-SMT-EVAL-2013 default unsat ✅ 3.21458 —
MathSAT5-HeavyBV-SMT-COMP-2012 default unsat ✅ 6.60077 —
MathSAT5-SMT-COMP-2011 default unsat ✅ 3.68240 —
MathSAT5-SMT-COMP-2012 default unsat ✅ 3.00701 —
SONOLAR SONOLAR-2013-05-15-SMT-EVAL-2013 default unsat ✅ 0.28025 —
SONOLAR-SMT-COMP-2010 default unsat ✅ 2.75977 —
SONOLAR-SMT-COMP-2011 default unsat ✅ 0.34257 —
SONOLAR-SMT-COMP-2012 default unsat ✅ 0.38850 —
STP STP2-SMT-COMP-2011 default unsat ✅ 0.30979 —
STP2-SMT-COMP-2012 default unsat ✅ 0.35201 —
simplifyingSTP-SMT-COMP-2010 default unsat ✅ 0.37520 —
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-EVAL-2013 default unsat ✅ 0.23722 —
Z3-SMT-COMP-2011 default unsat ✅ 0.22640 —
SMT-COMP 2014 4Simp 4Simp - 2014 default unsat ✅ 0.26461 0.25496
Abziz abziz_portfolio_all_features default unsat ✅ 0.50496 0.49192
abziz_portfolio_min_features default unsat ✅ 0.49217 0.48592
Boolector Boolector boolector unsat ✅ 0.78790 0.77988
CVC4 CVC4 f7118b2 default unsat ✅ 1.25327 2.45763
MathSAT MathSAT-5.2.12-Main default unsat ✅ 3.73798 3.73043
SONOLAR sonolar_smtcomp-2014 default unsat ✅ 0.28915 0.27796
STP stp-cryptominisat4 default unsat ✅ 0.45786 0.44893
Yices2 Yices-2.2.1-smtcomp2014 default unsat ✅ 0.10658 0.08998
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-COMP-2014 default unsat ✅ 0.28729 0.27396
SMT-COMP 2015 Boolector Boolector SMT15 QF_BV final boolector_qf_bv unsat ✅ 1.01382 1.01284
CVC4 CVC4-master-2015-06-15-9b32405-main default unsat ✅ 1.35744 2.68059
CVC4-experimental-2015-06-15-ff5745a-main default unsat ✅ 1.31957 2.60260
MathSAT MathSat 5.3.6 main smtcomp2015_main unsat ✅ 2.10825 2.10068
SMT-RAT SMT-RAT-final default unsat ✅ 117.29900 117.34500
STP stp-cryptominisat4 default unsat ✅ 0.42409 0.42294
stp-cmsat4-v15 default unsat ✅ 0.32215 0.32095
stp-cmsat4-mt-v15 default unknown ❌ 0.16268 0.16098
stp-minisat-v15 default unsat ✅ 0.38437 0.38294
Yices2 Yices default unsat ✅ 0.15565 0.15498
Z3 z3 4.4.0 default unsat ✅ 0.26833 0.26796
SMT-COMP 2016 ABC ABC_default default_abc unsat ✅ 0.30305 0.30312
ABC_glucose glucose unsat ✅ 0.86184 0.86034
Boolector Boolector boolector unsat ✅ 1.83504 1.83601
Boolector preprop boolector unsat ✅ 1.84780 1.84880
CVC4 CVC4-master-2016-05-27-cfef263-main default unsat ✅ 6.81431 13.64130
MapleSTP MapleSTP default unsat ✅ 1.13538 1.13599
MapleSTP-mt default unsat ✅ 1.13619 4.05085
MathSAT mathsat-5.3.11-linux-x86_64-Main default unsat ✅ 1.68813 1.69093
MinkeyRink Minkeyrink 2016 default unsat ✅ 0.87688 1.11487
Q3B Q3B default unsat ✅ 0.55287 0.45149
STP stp-cms-exp-2016 default unsat ✅ 0.47133 0.47156
stp-cms-mt-2016 default unsat ✅ 0.49328 1.50819
stp-cms-st-2016 default unsat ✅ 0.45904 0.45925
stp-minisat-st-2016 default unsat ✅ 2.36970 2.37131
Yices2 Yices-2.4.2 default unsat ✅ 0.06260 0.06257
Z3 z3-4.4.1 default unsat ✅ 0.27409 0.27544
SMT-COMP 2017 Boolector Boolector+CaDiCaL SMT17 final boolector unsat ✅ 0.90266 0.90173
Boolector SMT17 final boolector unsat ✅ 2.38125 2.38091
CVC4 CVC4-smtcomp2017-main default unsat ✅ 1.63425 3.23658
MathSAT mathsat-5.4.1-linux-x86_64-Main default unsat ✅ 1.99743 1.99586
MinkeyRink MinkeyRink 2017.3a default unsat ✅ 0.45615 0.43890
Q3B Q3B default unsat ✅ 0.59531 1.29000
STP stp_st default unsat ✅ 1.29375 1.29324
stp_mt default unsat ✅ 1.65701 4.12627
Yices2 Yices2-Main default unsat ✅ 0.15905 0.15355
Z3 z3-4.5.0 default unsat ✅ 0.27460 0.27335
SMT-COMP 2018 Boolector Boolector_default unsat ✅ 0.76508 0.76496
CVC4 master-2018-06-10-b19c840-competition-default_default unsat ✅ 3.62124 3.62125
MathSAT mathsat-5.5.2-linux-x86_64-Main_default unsat ✅ 1.76148 1.76206
MinkeyRink Minkeyrink MT_mt unsat ✅ 0.25345 0.56957
Minkeyrink ST_st unsat ✅ 0.24027 0.24023
STP STP-CMS-st-2018_default-no-stderr unsat ✅ 0.69430 0.69446
STP-CMS-mt-2018_multicore-no-stderr unsat ✅ 0.77362 2.43535
STP-Riss-st-2018_riss-no-stderr unsat ✅ 1.34826 1.34813
Yices2 Yices 2.6.0_default unsat ✅ 0.09810 0.09799
Z3 z3-4.7.1_default unsat ✅ 0.26520 0.26474
SMT-COMP 2019 Boolector Boolector-wrapped-sq_default unsat ✅ 1.16711 1.16709
Poolector-wrapped-sq_default unsat ✅ 1.09292 4.87892
Boolector-ReasonLS boolector-ReasonLS-wrapped-sq_default unsat ✅ 2.41357 2.41343
CVC4 CVC4-2019-06-03-d350fe1-wrapped-sq_default unsat ✅ 6.25363 6.25377
MinkeyRink MinkeyRink MT-wrapped-sq_default unsat ✅ 0.15171 0.29768
MinkeyRink ST-wrapped-sq_default unsat ✅ 0.16638 0.16647
Par4 Par4-wrapped-sq_default unsat ✅ 0.07014 0.00604
STP STP-2019-wrapped-sq_default unsat ✅ 0.67026 0.67040
stp-mergesat-fixed-wrapped-sq_default unsat ✅ 2.63891 2.63896
stp-minisat-wrapped-sq_default unsat ✅ 0.85708 0.85731
stp-mt-wrapped-sq_default unsat ✅ 0.73622 2.20969
stp-portfolio-fixed-wrapped-sq_default unsat ✅ 2.75868 3.93800
stp-riss-wrapped-sq_default unknown ❌ 0.21319 0.21318
Yices2 Yices 2.6.2-wrapped-sq_default unsat ✅ 0.06402 0.06402
Yices 2.6.2 Cadical-wrapped-sq_default unsat ✅ 0.37694 0.37694
Yices 2.6.2 Cryptominisat-wrapped-sq_default unsat ✅ 0.14234 0.14235
Yices 2.6.2 MCSAT BV-wrapped-sq_default unknown ❌ 2400.05000 2399.92000
Yices 2.6.2 new bvsolver-wrapped-sq_default unsat ✅ 0.17616 0.17618
Z3 z3-4.8.4-d6df51951f4c-wrapped-sq_default unsat ✅ 0.33143 0.33144
SMT-COMP 2020 0.11 (8/9) Bitwuzla Bitwuzla-fixed_default unsat ✅ 1.12700 1.12694
Boolector Boolector-wrapped-sq_default unsat ✅ 1.03328 1.03306
Poolector-wrapped-sq_default unsat ✅ 0.98416 3.34000
CVC4 CVC4-sq-final_default unsat ✅ 5.78985 5.79006
LazyBV2Int LazyBV2Int20200523_default.sh unknown ❌ 1200.03000 1199.98000
MathSAT MathSAT5_default.sh unsat ✅ 3.15994 3.15982
MinkeyRink MinkeyRink Solver 2020.3.1_default unknown ❌ 0.10891 0.10914
MinkeyRink Solver 2020.3_default unsat ✅ 0.16882 0.34459
STP STP_default unsat ✅ 0.29771 0.71063
STP ++ Mergsat v1_default unsat ✅ 0.27458 0.27630
Yices2 Yices 2.6.2 bug fix_default unsat ✅ 0.11663 0.11659
Z3 z3-4.8.8_default unsat ✅ 0.34826 0.34805
SMT-COMP 2022 Bitwuzla Bitwuzla-fixed_default unsat ✅ 1.13172 1.13170
Bitwuzla-wrapped_default unsat ✅ 1.20073 1.20051
cvc5 cvc5-default-2022-07-02-b15e116-wrapped_sq unsat ✅ 6.79691 6.79768
MathSAT MathSAT-5.6.8_default unsat ✅ 3.05935 3.05878
STP STP 2022.4_default unsat ✅ 0.55823 0.55825
Yices2 Yices 2.6.2 for SMTCOMP 2021_default unsat ✅ 0.13970 0.13966
Z3++BV z3++bv_0702_default unsat ✅ 0.38468 0.38458
Z3 z3-4.8.17_default unsat ✅ 0.31971 0.32151
SMT-COMP 2025 0.11 (8/9) Bitwuzla Bitwuzla unsat ✅ 0.44947 0.32068
Bitwuzla-MachBV-base unsat ✅ 0.39214 0.27237
Bitwuzla-MachBV Bitwuzla-MachBV unsat ✅ 0.52395 0.39555
BVDecide bv_decide unknown ❌ 1201.39535 1201.01183
bv_decide-nokernel unsat ✅ 6.13492 6.00309
cvc5 cvc5 unsat ✅ 4.02451 3.89497
SMTInterpol SMTInterpol unknown ❌ 1201.37582 1204.52115
Yices2 Yices2 unsat ✅ 0.42378 0.30890
Z3alpha Z3-alpha unsat ✅ 0.69227 1.53513
Z3 Z3-alpha-base unsat ✅ 0.39605 0.27981
Z3-Owl-base unsat ✅ 0.78309 0.65624
z3siri-base unsat ✅ 0.40955 0.28081
Z3-Owl Z3-Owl unsat ✅ 2.12407 1.99512