Benchmark

non-incremental/QF_BV/brummayerbiere/nlzbs016.smt2 

Number of leading zeros nlz(x) algorithm, binary search 
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
Size5423
Compressed Size1100
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 5415
Compressed Size1115
Max. Term Depth48
Asserts 1
Declared Functions0
Declared Constants1
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite60 not1 =58 let38
bvnot17 bvand16 bvor16 bvadd19
bvsub1 bvshl19 bvlshr4 zero_extend16

Evaluations

Evaluation Rating Solver Variant Result Wallclock CPU Time
SMT Evaluation 2013 4Simp 4Simp-SMT-COMP-2012 default unsat ✅ 0.02235 —
Abziz abziz_portfolio_2011_minfeatures_2 default unsat ✅ 0.02588 —
abziz_portfolio_2011_solvers_2 default unsat ✅ 0.02637 —
abziz_portfolio_2012_minfeatures default unsat ✅ 0.02552 —
abziz_portfolio_2012_solvers default unsat ✅ 0.04189 —
AbzizPortfolio-SMT-COMP-2012 default unsat ✅ 0.02533 —
Boolector Boolector-1.5.118-SMT-EVAL-2013 default unsat ✅ 0.01886 —
Boolector-SMT-COMP-2011 default unsat ✅ 0.07651 —
Boolector-SMT-COMP-2012 default unsat ✅ 0.09794 —
CVC3 CVC3-SMT-COMP-2010 default unsat ✅ 1.43313 —
CVC3-SMT-COMP-2011 default unsat ✅ 1.31833 —
CVC3-SMT-COMP-2012 default unsat ✅ 1.34246 —
CVC4 CVC4-SMT-COMP-2012-Resubmission default unsat ✅ 0.04727 —
CVC4-SMT-EVAL-2013 default unsat ✅ 0.10718 —
MathSAT MathSAT5-5.2.6-SMT-EVAL-2013 default unsat ✅ 0.06755 —
MathSAT5-HeavyBV-SMT-COMP-2012 default unsat ✅ 0.13760 —
MathSAT5-SMT-COMP-2011 default unsat ✅ 0.06678 —
MathSAT5-SMT-COMP-2012 default unsat ✅ 0.06058 —
SONOLAR SONOLAR-2013-05-15-SMT-EVAL-2013 default unsat ✅ 0.01121 —
SONOLAR-SMT-COMP-2010 default unsat ✅ 0.11055 —
SONOLAR-SMT-COMP-2011 default unsat ✅ 0.01584 —
SONOLAR-SMT-COMP-2012 default unsat ✅ 0.01704 —
STP STP2-SMT-COMP-2011 default unsat ✅ 0.01789 —
STP2-SMT-COMP-2012 default unsat ✅ 0.02638 —
simplifyingSTP-SMT-COMP-2010 default unsat ✅ 0.02006 —
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-EVAL-2013 default unsat ✅ 0.01223 —
Z3-SMT-COMP-2011 default unsat ✅ 0.02041 —
SMT-COMP 2014 4Simp 4Simp - 2014 default unsat ✅ 0.02289 0.01300
Abziz abziz_portfolio_all_features default unsat ✅ 0.06023 0.04699
abziz_portfolio_min_features default unsat ✅ 0.05230 0.03899
Boolector Boolector boolector unsat ✅ 0.04400 0.04299
CVC4 CVC4 f7118b2 default unsat ✅ 0.08719 0.13598
MathSAT MathSAT-5.2.12-Main default unsat ✅ 0.07154 0.06299
SONOLAR sonolar_smtcomp-2014 default unsat ✅ 0.02074 0.01000
STP stp-cryptominisat4 default unsat ✅ 0.03875 0.02999
Yices2 Yices-2.2.1-smtcomp2014 default unsat ✅ 0.01225 0.00300
Z3 Z3-4.3.2.a054b099c1d6-x64-debian-6.0.6-SMT-COMP-2014 default unsat ✅ 0.01991 0.01200
SMT-COMP 2015 Boolector Boolector SMT15 QF_BV final boolector_qf_bv unsat ✅ 0.04593 0.04499
CVC4 CVC4-master-2015-06-15-9b32405-main default unsat ✅ 0.07885 0.14098
CVC4-experimental-2015-06-15-ff5745a-main default unsat ✅ 0.07852 0.14098
MathSAT MathSat 5.3.6 main smtcomp2015_main unsat ✅ 0.09234 0.09098
SMT-RAT SMT-RAT-final default unsat ✅ 0.98233 0.98185
STP stp-cryptominisat4 default unsat ✅ 0.03108 0.03000
stp-cmsat4-v15 default unsat ✅ 0.02915 0.02799
stp-cmsat4-mt-v15 default unknown ❌ 0.03697 0.03599
stp-minisat-v15 default unsat ✅ 0.02880 0.02799
Yices2 Yices default unsat ✅ 0.00821 0.00300
Z3 z3 4.4.0 default unsat ✅ 0.03592 0.03599
SMT-COMP 2016 ABC ABC_default default_abc unsat ✅ 0.07892 0.07305
ABC_glucose glucose unsat ✅ 0.09166 0.08933
Boolector Boolector boolector unsat ✅ 0.08656 0.08663
Boolector preprop boolector unsat ✅ 0.09099 0.09110
CVC4 CVC4-master-2016-05-27-cfef263-main default unsat ✅ 0.07639 0.13763
MapleSTP MapleSTP default unsat ✅ 0.02241 0.02256
MapleSTP-mt default unsat ✅ 0.02601 0.04087
MathSAT mathsat-5.3.11-linux-x86_64-Main default unsat ✅ 0.07800 0.07903
MinkeyRink Minkeyrink 2016 default unsat ✅ 0.08306 0.09231
Q3B Q3B default unsat ✅ 0.08642 0.08724
STP stp-cms-exp-2016 default unsat ✅ 0.02392 0.02390
stp-cms-mt-2016 default unsat ✅ 0.02491 0.03935
stp-cms-st-2016 default unsat ✅ 0.02257 0.02255
stp-minisat-st-2016 default unsat ✅ 0.02405 0.02404
Yices2 Yices-2.4.2 default unsat ✅ 0.01434 0.00475
Z3 z3-4.4.1 default unsat ✅ 0.03350 0.03512
SMT-COMP 2017 0.12 (7/8) Boolector Boolector+CaDiCaL SMT17 final boolector unsat ✅ 0.06089 0.06048
Boolector SMT17 final boolector unsat ✅ 0.15252 0.14854
CVC4 CVC4-smtcomp2017-main default unsat ✅ 0.19415 0.20678
MathSAT mathsat-5.4.1-linux-x86_64-Main default unsat ✅ 0.09474 0.08610
MinkeyRink MinkeyRink 2017.3a default unsat ✅ 0.09196 0.05128
Q3B Q3B default unknown ❌ 0.11871 0.11886
STP stp_st default unsat ✅ 0.14062 0.03674
stp_mt default unsat ✅ 0.03591 0.04603
Yices2 Yices2-Main default unsat ✅ 0.00931 0.00503
Z3 z3-4.5.0 default unsat ✅ 0.03711 0.03541
SMT-COMP 2018 Boolector Boolector_default unsat ✅ 0.05244 0.05238
CVC4 master-2018-06-10-b19c840-competition-default_default unsat ✅ 0.14569 0.14567
MathSAT mathsat-5.5.2-linux-x86_64-Main_default unsat ✅ 0.07643 0.07743
MinkeyRink Minkeyrink MT_mt unsat ✅ 0.03927 0.04229
Minkeyrink ST_st unsat ✅ 0.03760 0.03782
STP STP-CMS-st-2018_default-no-stderr unsat ✅ 0.02603 0.02624
STP-CMS-mt-2018_multicore-no-stderr unsat ✅ 0.02991 0.03438
STP-Riss-st-2018_riss-no-stderr unsat ✅ 0.07556 0.07558
Yices2 Yices 2.6.0_default unsat ✅ 0.01088 0.00672
Z3 z3-4.7.1_default unsat ✅ 0.03908 0.03903