./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b0ae54926d75c04421ee4ea5930c958fb8ba0ccacc4d56435da8ae7b298172d --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 09:07:29,576 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:07:29,627 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:07:29,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:07:29,632 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:07:29,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:07:29,651 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:07:29,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:07:29,652 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:07:29,653 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:07:29,653 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:07:29,654 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:07:29,654 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:07:29,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:07:29,655 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:07:29,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:07:29,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:07:29,656 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:07:29,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:07:29,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:07:29,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:07:29,660 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:07:29,660 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:07:29,661 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:07:29,661 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:07:29,661 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:07:29,661 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:07:29,661 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:07:29,662 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:07:29,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:07:29,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:07:29,662 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:07:29,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:07:29,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:07:29,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:07:29,667 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:07:29,667 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:07:29,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:07:29,668 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:07:29,668 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:07:29,668 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:07:29,669 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:07:29,669 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b0ae54926d75c04421ee4ea5930c958fb8ba0ccacc4d56435da8ae7b298172d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:07:29,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:07:29,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:07:29,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:07:29,961 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:07:29,962 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:07:29,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2024-09-13 09:07:31,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:07:31,581 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:07:31,582 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2024-09-13 09:07:31,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/24b1c0880/9ca54060165b4e7a807efcc403c43b30/FLAGe3d48bb35 [2024-09-13 09:07:31,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/24b1c0880/9ca54060165b4e7a807efcc403c43b30 [2024-09-13 09:07:31,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:07:31,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:07:31,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:07:31,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:07:31,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:07:31,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f0a61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31, skipping insertion in model container [2024-09-13 09:07:31,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,640 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:07:31,778 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] [2024-09-13 09:07:31,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:07:31,803 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:07:31,818 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] [2024-09-13 09:07:31,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:07:31,848 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:07:31,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31 WrapperNode [2024-09-13 09:07:31,849 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:07:31,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:07:31,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:07:31,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:07:31,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,865 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,872 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:07:31,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:07:31,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:07:31,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:07:31,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:07:31,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,908 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-13 09:07:31,909 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,919 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,920 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:07:31,927 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:07:31,927 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:07:31,927 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:07:31,928 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (1/1) ... [2024-09-13 09:07:31,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:07:31,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:07:31,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 09:07:31,978 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 09:07:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:07:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:07:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:07:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:07:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:07:32,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:07:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:07:32,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:07:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:07:32,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:07:32,081 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:07:32,084 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:07:32,279 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-13 09:07:32,279 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:07:32,298 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:07:32,298 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 09:07:32,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:07:32 BoogieIcfgContainer [2024-09-13 09:07:32,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:07:32,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:07:32,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:07:32,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:07:32,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:07:31" (1/3) ... [2024-09-13 09:07:32,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1670b9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:07:32, skipping insertion in model container [2024-09-13 09:07:32,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:07:31" (2/3) ... [2024-09-13 09:07:32,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1670b9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:07:32, skipping insertion in model container [2024-09-13 09:07:32,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:07:32" (3/3) ... [2024-09-13 09:07:32,307 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2024-09-13 09:07:32,324 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:07:32,325 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:07:32,378 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:07:32,384 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@736a74e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:07:32,385 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:07:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 09:07:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 09:07:32,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:07:32,397 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:07:32,397 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:07:32,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:32,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1996614108, now seen corresponding path program 1 times [2024-09-13 09:07:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:07:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520498017] [2024-09-13 09:07:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:07:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:32,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:07:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:07:32,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:07:32,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520498017] [2024-09-13 09:07:32,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520498017] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:07:32,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:07:32,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 09:07:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623828808] [2024-09-13 09:07:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:07:32,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 09:07:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:07:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 09:07:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 09:07:32,629 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:07:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:07:32,710 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-09-13 09:07:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 09:07:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-13 09:07:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:07:32,722 INFO L225 Difference]: With dead ends: 41 [2024-09-13 09:07:32,722 INFO L226 Difference]: Without dead ends: 21 [2024-09-13 09:07:32,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 09:07:32,730 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:07:32,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:07:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-13 09:07:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-13 09:07:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:07:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-13 09:07:32,775 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2024-09-13 09:07:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:07:32,776 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-13 09:07:32,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:07:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-13 09:07:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 09:07:32,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:07:32,780 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:07:32,780 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:07:32,780 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:07:32,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:32,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1251497910, now seen corresponding path program 1 times [2024-09-13 09:07:32,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:07:32,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175385802] [2024-09-13 09:07:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:07:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:32,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:07:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:07:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:07:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175385802] [2024-09-13 09:07:32,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175385802] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:07:32,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:07:32,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 09:07:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883347060] [2024-09-13 09:07:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:07:32,980 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:07:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:07:32,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:07:32,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:07:32,982 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:07:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:07:33,068 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-13 09:07:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 09:07:33,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-13 09:07:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:07:33,070 INFO L225 Difference]: With dead ends: 34 [2024-09-13 09:07:33,071 INFO L226 Difference]: Without dead ends: 22 [2024-09-13 09:07:33,071 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:07:33,073 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:07:33,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:07:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-13 09:07:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-13 09:07:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:07:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-09-13 09:07:33,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2024-09-13 09:07:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:07:33,087 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-09-13 09:07:33,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:07:33,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-09-13 09:07:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 09:07:33,091 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:07:33,091 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:07:33,091 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 09:07:33,091 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:07:33,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash -239317110, now seen corresponding path program 1 times [2024-09-13 09:07:33,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:07:33,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307782875] [2024-09-13 09:07:33,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:33,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:07:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:07:33,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000393174] [2024-09-13 09:07:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:33,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:07:33,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:07:33,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:07:33,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:07:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:33,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:07:33,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:07:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:07:33,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 09:07:33,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:07:33,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307782875] [2024-09-13 09:07:33,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:07:33,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000393174] [2024-09-13 09:07:33,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000393174] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:07:33,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:07:33,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 09:07:33,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220268860] [2024-09-13 09:07:33,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:07:33,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 09:07:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:07:33,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 09:07:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:07:33,283 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:07:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:07:33,347 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-09-13 09:07:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:07:33,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-13 09:07:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:07:33,350 INFO L225 Difference]: With dead ends: 34 [2024-09-13 09:07:33,351 INFO L226 Difference]: Without dead ends: 31 [2024-09-13 09:07:33,352 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 09:07:33,353 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:07:33,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:07:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-13 09:07:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-13 09:07:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 09:07:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-13 09:07:33,366 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2024-09-13 09:07:33,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:07:33,366 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-13 09:07:33,366 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:07:33,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-13 09:07:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-13 09:07:33,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:07:33,368 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:07:33,389 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 09:07:33,572 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:07:33,573 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:07:33,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash 726925940, now seen corresponding path program 1 times [2024-09-13 09:07:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:07:33,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339750007] [2024-09-13 09:07:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:07:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:33,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:07:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:33,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 09:07:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:07:33,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:07:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339750007] [2024-09-13 09:07:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339750007] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:07:33,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:07:33,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 09:07:33,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552671200] [2024-09-13 09:07:33,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:07:33,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 09:07:33,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:07:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 09:07:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 09:07:33,921 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:07:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:07:33,988 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-09-13 09:07:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 09:07:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-09-13 09:07:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:07:33,991 INFO L225 Difference]: With dead ends: 57 [2024-09-13 09:07:33,991 INFO L226 Difference]: Without dead ends: 32 [2024-09-13 09:07:33,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 09:07:33,994 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:07:33,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 09:07:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-13 09:07:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-13 09:07:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 09:07:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-09-13 09:07:34,010 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2024-09-13 09:07:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:07:34,011 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-09-13 09:07:34,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:07:34,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-09-13 09:07:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 09:07:34,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:07:34,016 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:07:34,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 09:07:34,016 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:07:34,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1153424271, now seen corresponding path program 1 times [2024-09-13 09:07:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:07:34,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187434575] [2024-09-13 09:07:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:07:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:34,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:07:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:34,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 09:07:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 09:07:34,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:07:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187434575] [2024-09-13 09:07:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187434575] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:07:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327576355] [2024-09-13 09:07:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:34,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:07:34,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:07:34,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:07:34,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:07:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:34,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 09:07:34,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:07:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 09:07:34,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:07:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 09:07:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327576355] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:07:34,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:07:34,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-13 09:07:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293628040] [2024-09-13 09:07:34,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:07:34,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 09:07:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:07:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 09:07:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:07:34,337 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:07:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:07:34,470 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-09-13 09:07:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 09:07:34,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2024-09-13 09:07:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:07:34,472 INFO L225 Difference]: With dead ends: 72 [2024-09-13 09:07:34,472 INFO L226 Difference]: Without dead ends: 51 [2024-09-13 09:07:34,473 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-13 09:07:34,476 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:07:34,477 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:07:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-13 09:07:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-13 09:07:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 09:07:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-13 09:07:34,493 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2024-09-13 09:07:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:07:34,493 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-13 09:07:34,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:07:34,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-13 09:07:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 09:07:34,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:07:34,497 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:07:34,514 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 09:07:34,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:07:34,698 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:07:34,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:07:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1935504499, now seen corresponding path program 1 times [2024-09-13 09:07:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:07:34,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229668489] [2024-09-13 09:07:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:07:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:07:34,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925439868] [2024-09-13 09:07:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:07:34,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:07:34,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:07:34,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:07:34,739 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:07:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:07:34,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-13 09:07:34,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:07:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:07:35,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:08:03,352 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 09:08:07,367 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~b~0 2147483648))) (or (= .cse0 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse1)) 4294967296)) (not (= .cse0 (mod (+ (* c_main_~b~0 c_main_~q~0 2) c_main_~r~0) 4294967296))) (< (* 2 .cse1) (+ 1 (mod c_main_~r~0 4294967296))))) is different from true [2024-09-13 09:08:31,475 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 09:08:39,522 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 09:08:58,274 WARN L293 SmtUtils]: Spent 14.74s on a formula simplification. DAG size of input: 11 DAG size of output: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 09:09:02,286 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~b~0 2147483648))) (or (= .cse0 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse1)) 4294967296)) (not (= .cse0 (mod (+ (* c_main_~b~0 c_main_~q~0 2) c_main_~r~0) 4294967296))) (< (* 2 .cse1) (+ c_main_~r~0 1)))) is different from true [2024-09-13 09:09:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-09-13 09:09:02,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:09:02,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229668489] [2024-09-13 09:09:02,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:09:02,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925439868] [2024-09-13 09:09:02,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925439868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:09:02,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:09:02,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2024-09-13 09:09:02,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087786227] [2024-09-13 09:09:02,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:09:02,295 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 09:09:02,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:09:02,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 09:09:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=187, Unknown=2, NotChecked=58, Total=306 [2024-09-13 09:09:02,296 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 09:09:06,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:09:10,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:09:14,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:09:19,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:09:23,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 09:09:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:09:24,671 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-09-13 09:09:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 09:09:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-09-13 09:09:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:09:24,674 INFO L225 Difference]: With dead ends: 85 [2024-09-13 09:09:24,674 INFO L226 Difference]: Without dead ends: 80 [2024-09-13 09:09:24,674 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=76, Invalid=236, Unknown=2, NotChecked=66, Total=380 [2024-09-13 09:09:24,675 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 10 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:09:24,675 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 239 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 211 Invalid, 5 Unknown, 165 Unchecked, 22.1s Time] [2024-09-13 09:09:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-13 09:09:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-09-13 09:09:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 09:09:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-13 09:09:24,697 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 26 [2024-09-13 09:09:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:09:24,697 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-13 09:09:24,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 09:09:24,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:09:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-13 09:09:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 09:09:24,700 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:09:24,700 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:09:24,708 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 09:09:24,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 09:09:24,904 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:09:24,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:09:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1306939949, now seen corresponding path program 2 times [2024-09-13 09:09:24,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:09:24,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544214439] [2024-09-13 09:09:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:09:24,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:09:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:09:24,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042206164] [2024-09-13 09:09:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:09:24,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:09:24,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:09:24,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:09:24,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:09:25,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:09:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:09:25,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 09:09:25,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:09:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 09:09:25,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:09:39,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:09:39,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544214439] [2024-09-13 09:09:39,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:09:39,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042206164] [2024-09-13 09:09:39,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042206164] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:09:39,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:09:39,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-13 09:09:39,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354773185] [2024-09-13 09:09:39,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:09:39,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 09:09:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:09:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 09:09:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=182, Unknown=3, NotChecked=0, Total=240 [2024-09-13 09:09:39,917 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:09:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:09:40,207 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2024-09-13 09:09:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 09:09:40,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-09-13 09:09:40,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:09:40,211 INFO L225 Difference]: With dead ends: 123 [2024-09-13 09:09:40,214 INFO L226 Difference]: Without dead ends: 120 [2024-09-13 09:09:40,214 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=61, Invalid=208, Unknown=3, NotChecked=0, Total=272 [2024-09-13 09:09:40,215 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:09:40,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 197 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:09:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-13 09:09:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2024-09-13 09:09:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.197674418604651) internal successors, (103), 91 states have internal predecessors, (103), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-13 09:09:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2024-09-13 09:09:40,262 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 32 [2024-09-13 09:09:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:09:40,263 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2024-09-13 09:09:40,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:09:40,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:09:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2024-09-13 09:09:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 09:09:40,266 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:09:40,266 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:09:40,273 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 09:09:40,466 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:09:40,467 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:09:40,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:09:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2037540399, now seen corresponding path program 3 times [2024-09-13 09:09:40,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:09:40,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31000760] [2024-09-13 09:09:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:09:40,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:09:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:09:41,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:09:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:09:41,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 09:09:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:09:41,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 09:09:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:09:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:09:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:09:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31000760] [2024-09-13 09:09:41,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31000760] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:09:41,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241112338] [2024-09-13 09:09:41,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:09:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:09:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:09:41,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:09:41,080 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:11:35,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 09:11:35,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:11:35,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 09:11:35,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:11:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:11:36,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:11:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:11:36,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241112338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:11:36,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:11:36,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2024-09-13 09:11:36,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303233299] [2024-09-13 09:11:36,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:11:36,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 09:11:36,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:11:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 09:11:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:11:36,639 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 09:11:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:11:36,932 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2024-09-13 09:11:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:11:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 35 [2024-09-13 09:11:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:11:36,933 INFO L225 Difference]: With dead ends: 137 [2024-09-13 09:11:36,933 INFO L226 Difference]: Without dead ends: 69 [2024-09-13 09:11:36,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-13 09:11:36,934 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:11:36,935 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 127 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:11:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-13 09:11:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2024-09-13 09:11:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.183673469387755) internal successors, (58), 52 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 09:11:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-09-13 09:11:36,952 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 35 [2024-09-13 09:11:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:11:36,952 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-09-13 09:11:36,953 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 09:11:36,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:11:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-09-13 09:11:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 09:11:36,954 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:11:36,954 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:11:36,976 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 09:11:37,154 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-13 09:11:37,155 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:11:37,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:11:37,156 INFO L85 PathProgramCache]: Analyzing trace with hash 201138440, now seen corresponding path program 2 times [2024-09-13 09:11:37,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:11:37,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430514831] [2024-09-13 09:11:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:11:37,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:11:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:11:37,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:11:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:11:37,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 09:11:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:11:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 09:11:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:11:37,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430514831] [2024-09-13 09:11:37,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430514831] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:11:37,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337888695] [2024-09-13 09:11:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:11:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:11:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:11:37,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:11:37,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:11:37,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:11:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:11:37,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 09:11:37,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:11:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 09:11:37,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:11:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 09:11:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337888695] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:11:37,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:11:37,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-09-13 09:11:37,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203175138] [2024-09-13 09:11:37,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:11:37,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 09:11:37,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:11:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 09:11:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-09-13 09:11:37,675 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:11:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:11:38,170 INFO L93 Difference]: Finished difference Result 252 states and 292 transitions. [2024-09-13 09:11:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 09:11:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-09-13 09:11:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:11:38,172 INFO L225 Difference]: With dead ends: 252 [2024-09-13 09:11:38,173 INFO L226 Difference]: Without dead ends: 219 [2024-09-13 09:11:38,173 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2024-09-13 09:11:38,174 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:11:38,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 132 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 09:11:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-13 09:11:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 122. [2024-09-13 09:11:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 101 states have internal predecessors, (117), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 09:11:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2024-09-13 09:11:38,208 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 34 [2024-09-13 09:11:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:11:38,208 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2024-09-13 09:11:38,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:11:38,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:11:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2024-09-13 09:11:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 09:11:38,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:11:38,210 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:11:38,217 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 09:11:38,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:11:38,410 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:11:38,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:11:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash -870169238, now seen corresponding path program 4 times [2024-09-13 09:11:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:11:38,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014799377] [2024-09-13 09:11:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:11:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:11:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:11:38,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193675229] [2024-09-13 09:11:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:11:38,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:11:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:11:38,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:11:38,443 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:11:38,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:11:38,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:11:38,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 09:11:38,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:11:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 09:11:39,264 INFO L327 TraceCheckSpWp]: Computing backward predicates...