Benchmark

non-incremental/QF_BV/brummayerbiere/nlzbe256.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
Size125614
Compressed Size9712
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 125606
Compressed Size9720
Max. Term Depth779
Asserts 1
Declared Functions0
Declared Constants2
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite1414 not1 =1286 let767
bvnot257 bvand256 bvor512 bvadd383
bvsub129 bvslt129 bvshl384 bvashr128
zero_extend256

Evaluations

Evaluation Rating Solver Variant Result Wallclock CPU Time
SMT Evaluation 2013 1.00 (0/9) 4Simp 4Simp-SMT-COMP-2012 default unknown ❌ — —
Abziz abziz_portfolio_2011_minfeatures_2 default unknown ❌ — —
abziz_portfolio_2011_solvers_2 default unknown ❌ — —
abziz_portfolio_2012_minfeatures default unknown ❌ — —
abziz_portfolio_2012_solvers default unknown ❌ — —
AbzizPortfolio-SMT-COMP-2012 default unknown ❌ — —
Boolector Boolector-1.5.118-SMT-EVAL-2013 default unknown ❌ — —
Boolector-SMT-COMP-2011 default unknown ❌ — —
Boolector-SMT-COMP-2012 default unknown ❌ — —
CVC3 CVC3-SMT-COMP-2010 default unknown ❌ — —
CVC3-SMT-COMP-2011 default unknown ❌ — —
CVC3-SMT-COMP-2012 default unknown ❌ — —
CVC4 CVC4-SMT-COMP-2012-Resubmission default unknown ❌ — —
CVC4-SMT-EVAL-2013 default unknown ❌ — —
MathSAT MathSAT5-5.2.6-SMT-EVAL-2013 default unknown ❌ — —
MathSAT5-HeavyBV-SMT-COMP-2012 default unknown ❌ — —
MathSAT5-SMT-COMP-2011 default unknown ❌ — —
MathSAT5-SMT-COMP-2012 default unknown ❌ — —
SONOLAR SONOLAR-2013-05-15-SMT-EVAL-2013 default unknown ❌ — —
SONOLAR-SMT-COMP-2010 default unknown ❌ — —
SONOLAR-SMT-COMP-2011 default unknown ❌ — —
SONOLAR-SMT-COMP-2012 default unknown ❌ — —
STP STP2-SMT-COMP-2011 default unknown ❌ — —
STP2-SMT-COMP-2012 default unknown ❌ — —
simplifyingSTP-SMT-COMP-2010 default unknown ❌ — —
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-EVAL-2013 default unknown ❌ — —
Z3-SMT-COMP-2011 default unknown ❌ — —
SMT-COMP 2014 0.11 (8/9) 4Simp 4Simp - 2014 default unsat ✅ 9.60046 9.59954
Abziz abziz_portfolio_all_features default unsat ✅ 54.42970 54.33450
abziz_portfolio_min_features default unsat ✅ 34.55110 34.46150
Boolector Boolector boolector unsat ✅ 120.78700 120.82400
CVC4 CVC4 f7118b2 default unknown ❌ 0.12403 0.12198
MathSAT MathSAT-5.2.12-Main default unsat ✅ 190.16800 190.23200
SONOLAR sonolar_smtcomp-2014 default unsat ✅ 15.48910 15.48360
STP stp-cryptominisat4 default unsat ✅ 14.82240 14.81970
Yices2 Yices-2.2.1-smtcomp2014 default unsat ✅ 9.66450 9.66053
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-COMP-2014 default unsat ✅ 21.45000 21.45770
SMT-COMP 2015 0.14 (6/7) Boolector Boolector SMT15 QF_BV final boolector_qf_bv unsat ✅ 31.79940 31.81120
CVC4 CVC4-master-2015-06-15-9b32405-main default unsat ✅ 554.06900 1112.89000
CVC4-experimental-2015-06-15-ff5745a-main default unsat ✅ 1247.05000 2506.96000
MathSAT MathSat 5.3.6 main smtcomp2015_main unsat ✅ 150.95400 151.01500
SMT-RAT SMT-RAT-final default unknown ❌ 2400.01000 2400.77000
STP stp-cryptominisat4 default unsat ✅ 23.03660 23.04450
stp-cmsat4-v15 default unsat ✅ 16.83010 16.83540
stp-cmsat4-mt-v15 default unknown ❌ 2.05483 2.05469
stp-minisat-v15 default unsat ✅ 15.97780 15.98260
Yices2 Yices default unsat ✅ 5.07593 5.07723
Z3 z3 4.4.0 default unsat ✅ 42.49680 42.51450
SMT-COMP 2016 ABC ABC_default default_abc unsat ✅ 33.35340 33.37200
ABC_glucose glucose unsat ✅ 19.61950 19.61860
Boolector Boolector boolector unsat ✅ 65.01080 65.04860
Boolector preprop boolector unsat ✅ 65.06710 65.10090
CVC4 CVC4-master-2016-05-27-cfef263-main default unsat ✅ 50.09970 100.36400
MapleSTP MapleSTP default unsat ✅ 403.42000 403.65000
MapleSTP-mt default unsat ✅ 431.18700 1702.61000
MathSAT mathsat-5.3.11-linux-x86_64-Main default unsat ✅ 127.24100 127.30400
MinkeyRink Minkeyrink 2016 default unsat ✅ 31.83130 41.90610
Q3B Q3B default unsat ✅ 244.25800 732.71000
STP stp-cms-exp-2016 default unsat ✅ 13.06360 13.06980
stp-cms-mt-2016 default unsat ✅ 14.08250 49.17990
stp-cms-st-2016 default unsat ✅ 12.95350 12.96090
stp-minisat-st-2016 default unsat ✅ 46.50830 46.53150
Yices2 Yices-2.4.2 default unsat ✅ 11.67880 11.68570
Z3 z3-4.4.1 default unsat ✅ 26.38030 26.39710
SMT-COMP 2017 Boolector Boolector+CaDiCaL SMT17 final boolector unsat ✅ 24.44560 24.44470
Boolector SMT17 final boolector unsat ✅ 45.48600 45.48880
CVC4 CVC4-smtcomp2017-main default unsat ✅ 59.51080 119.32400
MathSAT mathsat-5.4.1-linux-x86_64-Main default unsat ✅ 153.90500 153.87300
MinkeyRink MinkeyRink 2017.3a default unsat ✅ 13.02050 18.98000
Q3B Q3B default unsat ✅ 422.93300 839.37000
STP stp_st default unsat ✅ 45.19770 44.26030
stp_mt default unsat ✅ 130.98100 106.97800
Yices2 Yices2-Main default unsat ✅ 12.16540 12.16320
Z3 z3-4.5.0 default unsat ✅ 28.03800 28.03650
SMT-COMP 2018 Boolector Boolector_default unsat ✅ 20.96040 20.95630
CVC4 master-2018-06-10-b19c840-competition-default_default unsat ✅ 99.18550 99.18150
MathSAT mathsat-5.5.2-linux-x86_64-Main_default unsat ✅ 119.42600 119.42200
MinkeyRink Minkeyrink MT_mt unsat ✅ 9.26586 30.20860
Minkeyrink ST_st unsat ✅ 14.29970 14.29800
STP STP-CMS-st-2018_default-no-stderr unsat ✅ 24.86870 24.86880
STP-CMS-mt-2018_multicore-no-stderr unsat ✅ 30.85170 114.49100
STP-Riss-st-2018_riss-no-stderr unsat ✅ 69.40170 69.40200
Yices2 Yices 2.6.0_default unsat ✅ 3.95929 3.95888
Z3 z3-4.7.1_default unsat ✅ 42.55130 42.54880
SMT-COMP 2019 Boolector Boolector-wrapped-sq_default unsat ✅ 22.98720 22.98570
Poolector-wrapped-sq_default unsat ✅ 27.62040 108.81000
Boolector-ReasonLS boolector-ReasonLS-wrapped-sq_default unsat ✅ 61.71830 61.72110
CVC4 CVC4-2019-06-03-d350fe1-wrapped-sq_default unsat ✅ 163.82800 163.80400
MinkeyRink MinkeyRink MT-wrapped-sq_default unsat ✅ 3.75513 12.63900
MinkeyRink ST-wrapped-sq_default unsat ✅ 2.75887 2.75900
Par4 Par4-wrapped-sq_default unsat ✅ 10.85970 32.40000
STP STP-2019-wrapped-sq_default unsat ✅ 23.48660 23.48630
stp-mergesat-fixed-wrapped-sq_default unsat ✅ 334.70300 334.66200
stp-minisat-wrapped-sq_default unsat ✅ 34.99600 34.99330
stp-mt-wrapped-sq_default unsat ✅ 27.94860 103.54400
stp-portfolio-fixed-wrapped-sq_default unsat ✅ 318.64500 388.46600
stp-riss-wrapped-sq_default unknown ❌ 2.30306 2.30331
Yices2 Yices 2.6.2-wrapped-sq_default unsat ✅ 11.96520 11.96470
Yices 2.6.2 Cadical-wrapped-sq_default unsat ✅ 9.55162 9.55094
Yices 2.6.2 Cryptominisat-wrapped-sq_default unsat ✅ 24.49330 24.49130
Yices 2.6.2 MCSAT BV-wrapped-sq_default unknown ❌ 2400.10000 2399.86000
Yices 2.6.2 new bvsolver-wrapped-sq_default unsat ✅ 8.32500 8.32460
Z3 z3-4.8.4-d6df51951f4c-wrapped-sq_default unsat ✅ 36.24830 36.24690
SMT-COMP 2021 Bitwuzla Bitwuzla-fixed_default unsat ✅ 23.50090 23.48400
MathSAT mathsat-5.6.6_default unsat ✅ 299.21300 299.15400
STP STP 2021.0_default unsat ✅ 12.69700 44.62290
Z3 z3-4.8.11_default unsat ✅ 20.44210 20.44200
SMT-COMP 2024 0.17 (5/6) Bitwuzla Bitwuzla unsat ✅ 26.69936 26.59833
cvc5 cvc5 unsat ✅ 1122.90331 1122.36655
SMTInterpol SMTInterpol unknown ❌ 1201.72006 1207.18352
STP STP unsat ✅ 11.39077 11.29062
Yices2 Yices2 unsat ✅ 28.49212 28.38990
Z3alpha Z3-alpha unsat ✅ 117.69856 117.55285