Benchmark

non-incremental/QF_BV/brummayerbiere/nlzbe008.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
Size4330
Compressed Size1073
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 4322
Compressed Size1071
Max. Term Depth35
Asserts 1
Declared Functions0
Declared Constants2
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite50 not1 =46 let23
bvnot9 bvand8 bvor16 bvadd11
bvsub5 bvslt5 bvshl12 bvashr4
zero_extend8

Evaluations

Evaluation Rating Solver Variant Result Wallclock CPU Time
SMT Evaluation 2013 4Simp 4Simp-SMT-COMP-2012 default unsat ✅ 0.01774 —
Abziz abziz_portfolio_2011_minfeatures_2 default unsat ✅ 0.03935 —
abziz_portfolio_2011_solvers_2 default unsat ✅ 0.03821 —
abziz_portfolio_2012_minfeatures default unsat ✅ 0.02366 —
abziz_portfolio_2012_solvers default unsat ✅ 0.02387 —
AbzizPortfolio-SMT-COMP-2012 default unsat ✅ 0.02288 —
Boolector Boolector-1.5.118-SMT-EVAL-2013 default unsat ✅ 0.00999 —
Boolector-SMT-COMP-2011 default unsat ✅ 0.02537 —
Boolector-SMT-COMP-2012 default unsat ✅ 0.01204 —
CVC3 CVC3-SMT-COMP-2010 default unsat ✅ 0.38383 —
CVC3-SMT-COMP-2011 default unsat ✅ 0.36353 —
CVC3-SMT-COMP-2012 default unsat ✅ 0.37302 —
CVC4 CVC4-SMT-COMP-2012-Resubmission default unsat ✅ 0.02408 —
CVC4-SMT-EVAL-2013 default unsat ✅ 0.04332 —
MathSAT MathSAT5-5.2.6-SMT-EVAL-2013 default unsat ✅ 0.02946 —
MathSAT5-HeavyBV-SMT-COMP-2012 default unsat ✅ 0.04780 —
MathSAT5-SMT-COMP-2011 default unsat ✅ 0.02951 —
MathSAT5-SMT-COMP-2012 default unsat ✅ 0.02381 —
SONOLAR SONOLAR-2013-05-15-SMT-EVAL-2013 default unsat ✅ 0.00955 —
SONOLAR-SMT-COMP-2010 default unsat ✅ 0.01306 —
SONOLAR-SMT-COMP-2011 default unsat ✅ 0.01005 —
SONOLAR-SMT-COMP-2012 default unsat ✅ 0.01087 —
STP STP2-SMT-COMP-2011 default unsat ✅ 0.01538 —
STP2-SMT-COMP-2012 default unsat ✅ 0.02121 —
simplifyingSTP-SMT-COMP-2010 default unsat ✅ 0.01376 —
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-EVAL-2013 default unsat ✅ 0.01063 —
Z3-SMT-COMP-2011 default unsat ✅ 0.01805 —
SMT-COMP 2014 4Simp 4Simp - 2014 default unsat ✅ 0.02015 0.01000
Abziz abziz_portfolio_all_features default unsat ✅ 0.04764 0.03399
abziz_portfolio_min_features default unsat ✅ 0.04777 0.03399
Boolector Boolector boolector unsat ✅ 0.02546 0.01700
CVC4 CVC4 f7118b2 default unsat ✅ 0.04367 0.05499
MathSAT MathSAT-5.2.12-Main default unsat ✅ 0.03615 0.02600
SONOLAR sonolar_smtcomp-2014 default unsat ✅ 0.01740 0.00600
STP stp-cryptominisat4 default unsat ✅ 0.03490 0.02600
Yices2 Yices-2.2.1-smtcomp2014 default unsat ✅ 0.01090 0.00200
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-COMP-2014 default unsat ✅ 0.01722 0.00900
SMT-COMP 2015 Boolector Boolector SMT15 QF_BV final boolector_qf_bv unsat ✅ 0.01684 0.01600
CVC4 CVC4-master-2015-06-15-9b32405-main default unsat ✅ 0.03585 0.05599
CVC4-experimental-2015-06-15-ff5745a-main default unsat ✅ 0.04733 0.07999
MathSAT MathSat 5.3.6 main smtcomp2015_main unsat ✅ 0.05026 0.04899
SMT-RAT SMT-RAT-final default unsat ✅ 0.30867 0.30795
STP stp-cryptominisat4 default unsat ✅ 0.02686 0.02600
stp-cmsat4-v15 default unsat ✅ 0.02556 0.02499
stp-cmsat4-mt-v15 default unknown ❌ 0.04003 0.03399
stp-minisat-v15 default unsat ✅ 0.02517 0.02399
Yices2 Yices default unsat ✅ 0.00846 0.00200
Z3 z3 4.4.0 default unsat ✅ 0.03315 0.03299
SMT-COMP 2016 ABC ABC_default default_abc unsat ✅ 0.06988 0.06992
ABC_glucose glucose unsat ✅ 0.07081 0.07112
Boolector Boolector boolector unsat ✅ 0.02915 0.02970
Boolector preprop boolector unsat ✅ 0.03313 0.03319
CVC4 CVC4-master-2016-05-27-cfef263-main default unsat ✅ 0.04935 0.08390
MapleSTP MapleSTP default unsat ✅ 0.01881 0.01877
MapleSTP-mt default unsat ✅ 0.02014 0.02972
MathSAT mathsat-5.3.11-linux-x86_64-Main default unsat ✅ 0.04051 0.04150
MinkeyRink Minkeyrink 2016 default unsat ✅ 0.07103 0.07558
Q3B Q3B default unsat ✅ 0.06975 0.07054
STP stp-cms-exp-2016 default unsat ✅ 0.01813 0.01812
stp-cms-mt-2016 default unsat ✅ 0.02011 0.03069
stp-cms-st-2016 default unsat ✅ 0.01808 0.01805
stp-minisat-st-2016 default unsat ✅ 0.02128 0.02125
Yices2 Yices-2.4.2 default unsat ✅ 0.01284 0.00410
Z3 z3-4.4.1 default unsat ✅ 0.03213 0.03341
SMT-COMP 2017 Boolector Boolector+CaDiCaL SMT17 final boolector unsat ✅ 0.03834 0.03801
Boolector SMT17 final boolector unsat ✅ 0.06501 0.06377
CVC4 CVC4-smtcomp2017-main default unsat ✅ 0.04190 0.06785
MathSAT mathsat-5.4.1-linux-x86_64-Main default unsat ✅ 0.04330 0.04256
MinkeyRink MinkeyRink 2017.3a default unsat ✅ 0.09134 0.04966
Q3B Q3B default unsat ✅ 0.06846 0.06787
STP stp_st default unsat ✅ 0.02775 0.02779
stp_mt default unsat ✅ 0.03678 0.03737
Yices2 Yices2-Main default unsat ✅ 0.00934 0.00396
Z3 z3-4.5.0 default unsat ✅ 0.03375 0.03322
SMT-COMP 2018 Boolector Boolector_default unsat ✅ 0.03231 0.03226
CVC4 master-2018-06-10-b19c840-competition-default_default unsat ✅ 0.08793 0.08807
MathSAT mathsat-5.5.2-linux-x86_64-Main_default unsat ✅ 0.03980 0.04081
MinkeyRink Minkeyrink MT_mt unsat ✅ 0.03673 0.03998
Minkeyrink ST_st unsat ✅ 0.03361 0.03380
STP STP-CMS-st-2018_default-no-stderr unsat ✅ 0.02105 0.02124
STP-CMS-mt-2018_multicore-no-stderr unsat ✅ 0.02300 0.02557
STP-Riss-st-2018_riss-no-stderr unsat ✅ 0.02942 0.02951
Yices2 Yices 2.6.0_default unsat ✅ 0.01152 0.00675
Z3 z3-4.7.1_default unsat ✅ 0.03650 0.03644