./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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/loops-crafted-1/in-de41.c -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 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:40:44,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:40:44,842 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:40:44,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:40:44,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:40:44,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:40:44,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:40:44,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:40:44,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:40:44,884 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:40:44,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:40:44,885 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:40:44,885 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:40:44,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:40:44,888 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:40:44,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:40:44,888 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:40:44,889 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:40:44,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:40:44,889 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:40:44,889 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:40:44,890 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:40:44,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:40:44,891 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:40:44,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:40:44,892 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:40:44,892 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:40:44,892 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:40:44,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:40:44,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:40:44,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:40:44,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:40:44,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:40:44,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:40:44,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:40:44,895 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:40:44,895 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:40:44,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:40:44,896 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:40:44,896 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:40:44,896 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:40:44,897 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:40:44,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:40:45,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:40:45,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:40:45,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:40:45,186 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:40:45,186 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:40:45,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de41.c [2024-09-18 15:40:46,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:40:46,860 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:40:46,861 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de41.c [2024-09-18 15:40:46,871 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/859525a08/16bd7ec1a7bd42378d489e40608e0684/FLAG6ef1883f8 [2024-09-18 15:40:46,882 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/859525a08/16bd7ec1a7bd42378d489e40608e0684 [2024-09-18 15:40:46,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:40:46,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:40:46,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:40:46,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:40:46,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:40:46,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:40:46" (1/1) ... [2024-09-18 15:40:46,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82ae956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:46, skipping insertion in model container [2024-09-18 15:40:46,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:40:46" (1/1) ... [2024-09-18 15:40:46,910 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:40:47,042 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2024-09-18 15:40:47,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:40:47,065 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:40:47,077 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2024-09-18 15:40:47,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:40:47,100 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:40:47,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47 WrapperNode [2024-09-18 15:40:47,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:40:47,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:40:47,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:40:47,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:40:47,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,124 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,131 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:40:47,132 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:40:47,133 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:40:47,133 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:40:47,133 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:40:47,144 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,145 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,163 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]. [2024-09-18 15:40:47,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,166 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:40:47,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:40:47,179 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:40:47,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:40:47,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (1/1) ... [2024-09-18 15:40:47,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:40:47,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:47,209 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) [2024-09-18 15:40:47,211 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 [2024-09-18 15:40:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:40:47,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:40:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:40:47,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:40:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:40:47,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:40:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:40:47,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:40:47,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:40:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:40:47,302 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:40:47,304 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:40:47,482 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 15:40:47,482 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:40:47,498 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:40:47,499 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-18 15:40:47,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:40:47 BoogieIcfgContainer [2024-09-18 15:40:47,499 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:40:47,501 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:40:47,501 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:40:47,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:40:47,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:40:46" (1/3) ... [2024-09-18 15:40:47,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f880ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:40:47, skipping insertion in model container [2024-09-18 15:40:47,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:47" (2/3) ... [2024-09-18 15:40:47,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f880ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:40:47, skipping insertion in model container [2024-09-18 15:40:47,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:40:47" (3/3) ... [2024-09-18 15:40:47,507 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2024-09-18 15:40:47,523 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:40:47,523 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:40:47,571 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:40:47,576 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;@2c28bbcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:40:47,577 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:40:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:40:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:40:47,586 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:47,587 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:47,587 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:47,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1769832604, now seen corresponding path program 1 times [2024-09-18 15:40:47,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:47,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904586017] [2024-09-18 15:40:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:47,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:47,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904586017] [2024-09-18 15:40:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904586017] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:40:47,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:40:47,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:40:47,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694156761] [2024-09-18 15:40:47,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:47,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:40:47,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:40:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:40:47,793 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2024-09-18 15:40:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:47,815 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-09-18 15:40:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:40:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2024-09-18 15:40:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:47,823 INFO L225 Difference]: With dead ends: 36 [2024-09-18 15:40:47,823 INFO L226 Difference]: Without dead ends: 15 [2024-09-18 15:40:47,826 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:40:47,829 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:47,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:40:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-18 15:40:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-18 15:40:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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) [2024-09-18 15:40:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-09-18 15:40:47,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 14 [2024-09-18 15:40:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:47,873 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-09-18 15:40:47,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2024-09-18 15:40:47,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-09-18 15:40:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:40:47,876 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:47,876 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:47,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:40:47,877 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:47,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:47,877 INFO L85 PathProgramCache]: Analyzing trace with hash 406021780, now seen corresponding path program 1 times [2024-09-18 15:40:47,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:47,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812565058] [2024-09-18 15:40:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:47,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:48,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:48,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:48,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812565058] [2024-09-18 15:40:48,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812565058] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:40:48,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:40:48,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:40:48,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747580540] [2024-09-18 15:40:48,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:48,392 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:40:48,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:40:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:40:48,394 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2024-09-18 15:40:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:48,495 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-18 15:40:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:40:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2024-09-18 15:40:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:48,497 INFO L225 Difference]: With dead ends: 33 [2024-09-18 15:40:48,497 INFO L226 Difference]: Without dead ends: 21 [2024-09-18 15:40:48,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:40:48,499 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:48,501 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:40:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-18 15:40:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-18 15:40:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2024-09-18 15:40:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-18 15:40:48,513 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2024-09-18 15:40:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:48,513 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-18 15:40:48,513 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2024-09-18 15:40:48,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-18 15:40:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-18 15:40:48,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:48,516 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:48,516 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:40:48,517 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:48,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash 739520928, now seen corresponding path program 1 times [2024-09-18 15:40:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:48,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11971980] [2024-09-18 15:40:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:48,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:48,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:48,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:48,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11971980] [2024-09-18 15:40:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11971980] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:48,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717757812] [2024-09-18 15:40:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:48,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:48,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:48,649 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) [2024-09-18 15:40:48,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:40:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:48,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:40:48,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:48,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:48,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717757812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:48,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:48,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-18 15:40:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510675406] [2024-09-18 15:40:48,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:48,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:40:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:40:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:40:48,801 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2024-09-18 15:40:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:48,966 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2024-09-18 15:40:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 15:40:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 15 [2024-09-18 15:40:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:48,970 INFO L225 Difference]: With dead ends: 55 [2024-09-18 15:40:48,971 INFO L226 Difference]: Without dead ends: 48 [2024-09-18 15:40:48,972 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:40:48,974 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:48,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:40:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-18 15:40:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2024-09-18 15:40:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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) [2024-09-18 15:40:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-09-18 15:40:48,990 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 15 [2024-09-18 15:40:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:48,991 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-09-18 15:40:48,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2024-09-18 15:40:48,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-09-18 15:40:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 15:40:48,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:48,992 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:49,005 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:40:49,193 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 [2024-09-18 15:40:49,193 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:49,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash 518483476, now seen corresponding path program 1 times [2024-09-18 15:40:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011615902] [2024-09-18 15:40:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:49,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011615902] [2024-09-18 15:40:49,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011615902] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:40:49,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:40:49,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:40:49,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865965335] [2024-09-18 15:40:49,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:49,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:40:49,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:40:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:40:49,252 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-18 15:40:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:49,280 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-09-18 15:40:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:40:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2024-09-18 15:40:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:49,282 INFO L225 Difference]: With dead ends: 39 [2024-09-18 15:40:49,282 INFO L226 Difference]: Without dead ends: 28 [2024-09-18 15:40:49,283 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:40:49,284 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:49,285 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:40:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-18 15:40:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-18 15:40:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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) [2024-09-18 15:40:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-09-18 15:40:49,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2024-09-18 15:40:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:49,296 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-09-18 15:40:49,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-18 15:40:49,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-09-18 15:40:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 15:40:49,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:49,297 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:49,297 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-18 15:40:49,297 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:49,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash 291445903, now seen corresponding path program 1 times [2024-09-18 15:40:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:49,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418703531] [2024-09-18 15:40:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:49,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:49,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:49,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418703531] [2024-09-18 15:40:49,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418703531] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:49,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952401506] [2024-09-18 15:40:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:49,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:49,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:49,379 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) [2024-09-18 15:40:49,380 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:40:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:49,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:40:49,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:40:49,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:40:49,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952401506] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:49,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:49,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-18 15:40:49,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459540624] [2024-09-18 15:40:49,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:49,524 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:40:49,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:40:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:40:49,526 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2024-09-18 15:40:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:49,594 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2024-09-18 15:40:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:40:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 17 [2024-09-18 15:40:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:49,598 INFO L225 Difference]: With dead ends: 62 [2024-09-18 15:40:49,598 INFO L226 Difference]: Without dead ends: 56 [2024-09-18 15:40:49,599 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:40:49,599 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:49,599 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:40:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-18 15:40:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-09-18 15:40:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 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) [2024-09-18 15:40:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2024-09-18 15:40:49,619 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 17 [2024-09-18 15:40:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:49,619 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2024-09-18 15:40:49,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2024-09-18 15:40:49,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2024-09-18 15:40:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-18 15:40:49,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:49,621 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:49,639 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:40:49,825 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 [2024-09-18 15:40:49,826 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:49,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:49,826 INFO L85 PathProgramCache]: Analyzing trace with hash 480426180, now seen corresponding path program 1 times [2024-09-18 15:40:49,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:49,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305727522] [2024-09-18 15:40:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:49,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:50,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305727522] [2024-09-18 15:40:50,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305727522] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211537396] [2024-09-18 15:40:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:50,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:50,215 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) [2024-09-18 15:40:50,218 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:40:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:50,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-18 15:40:50,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:50,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:50,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211537396] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:50,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:50,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-09-18 15:40:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71157458] [2024-09-18 15:40:50,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:50,629 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:40:50,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:40:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:40:50,630 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:40:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:51,057 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2024-09-18 15:40:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 15:40:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-18 15:40:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:51,058 INFO L225 Difference]: With dead ends: 82 [2024-09-18 15:40:51,059 INFO L226 Difference]: Without dead ends: 70 [2024-09-18 15:40:51,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:40:51,060 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:51,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:40:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-18 15:40:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2024-09-18 15:40:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 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) [2024-09-18 15:40:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2024-09-18 15:40:51,083 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 18 [2024-09-18 15:40:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:51,083 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2024-09-18 15:40:51,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:40:51,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2024-09-18 15:40:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-18 15:40:51,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:51,085 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:51,106 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:40:51,289 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 [2024-09-18 15:40:51,290 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:51,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1871956372, now seen corresponding path program 2 times [2024-09-18 15:40:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:51,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673704748] [2024-09-18 15:40:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:51,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:51,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:51,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673704748] [2024-09-18 15:40:51,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673704748] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643875507] [2024-09-18 15:40:51,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:40:51,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:51,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:51,393 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) [2024-09-18 15:40:51,402 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:40:51,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:40:51,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:51,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:40:51,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:51,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:51,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643875507] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:51,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:51,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-18 15:40:51,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898713015] [2024-09-18 15:40:51,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:51,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:40:51,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:40:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:40:51,579 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2024-09-18 15:40:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:52,224 INFO L93 Difference]: Finished difference Result 192 states and 316 transitions. [2024-09-18 15:40:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-18 15:40:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 18 [2024-09-18 15:40:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:52,226 INFO L225 Difference]: With dead ends: 192 [2024-09-18 15:40:52,226 INFO L226 Difference]: Without dead ends: 177 [2024-09-18 15:40:52,227 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:40:52,228 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:52,228 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 196 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:40:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-18 15:40:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 88. [2024-09-18 15:40:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 83 states have internal predecessors, (122), 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) [2024-09-18 15:40:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2024-09-18 15:40:52,275 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 18 [2024-09-18 15:40:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:52,275 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2024-09-18 15:40:52,275 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2024-09-18 15:40:52,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2024-09-18 15:40:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:40:52,277 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:52,277 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:52,296 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:40:52,483 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 [2024-09-18 15:40:52,484 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:52,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1724400578, now seen corresponding path program 2 times [2024-09-18 15:40:52,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:52,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441151225] [2024-09-18 15:40:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:52,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:52,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:40:52,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:52,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441151225] [2024-09-18 15:40:52,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441151225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:52,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289625243] [2024-09-18 15:40:52,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:40:52,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:52,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:52,557 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) [2024-09-18 15:40:52,561 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:40:52,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:40:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:52,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:40:52,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:40:52,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:40:52,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289625243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:52,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:52,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-18 15:40:52,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438514934] [2024-09-18 15:40:52,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:52,715 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-18 15:40:52,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-18 15:40:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:40:52,716 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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) [2024-09-18 15:40:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:53,066 INFO L93 Difference]: Finished difference Result 145 states and 199 transitions. [2024-09-18 15:40:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 15:40:53,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 20 [2024-09-18 15:40:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:53,068 INFO L225 Difference]: With dead ends: 145 [2024-09-18 15:40:53,069 INFO L226 Difference]: Without dead ends: 117 [2024-09-18 15:40:53,070 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:40:53,071 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:53,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 150 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:40:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-18 15:40:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2024-09-18 15:40:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 71 states have internal predecessors, (103), 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) [2024-09-18 15:40:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2024-09-18 15:40:53,103 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 20 [2024-09-18 15:40:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:53,103 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2024-09-18 15:40:53,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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) [2024-09-18 15:40:53,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2024-09-18 15:40:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 15:40:53,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:53,105 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:53,121 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:40:53,309 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 [2024-09-18 15:40:53,310 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:53,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1048636735, now seen corresponding path program 3 times [2024-09-18 15:40:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:53,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112582368] [2024-09-18 15:40:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:53,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:53,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:40:53,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:53,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112582368] [2024-09-18 15:40:53,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112582368] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:53,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879911026] [2024-09-18 15:40:53,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:40:53,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:53,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:53,409 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) [2024-09-18 15:40:53,411 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:40:53,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-18 15:40:53,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:53,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-18 15:40:53,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:40:53,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:40:53,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879911026] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:53,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:53,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-18 15:40:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572593077] [2024-09-18 15:40:53,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:53,533 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:40:53,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:40:53,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:40:53,535 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2024-09-18 15:40:53,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:53,610 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2024-09-18 15:40:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:40:53,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 21 [2024-09-18 15:40:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:53,612 INFO L225 Difference]: With dead ends: 92 [2024-09-18 15:40:53,612 INFO L226 Difference]: Without dead ends: 87 [2024-09-18 15:40:53,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:40:53,613 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:53,614 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:40:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-18 15:40:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-09-18 15:40:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 79 states have internal predecessors, (112), 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) [2024-09-18 15:40:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2024-09-18 15:40:53,657 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 21 [2024-09-18 15:40:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:53,657 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2024-09-18 15:40:53,658 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2024-09-18 15:40:53,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2024-09-18 15:40:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-18 15:40:53,660 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:53,660 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:53,677 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:53,860 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 [2024-09-18 15:40:53,861 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:53,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1816461804, now seen corresponding path program 4 times [2024-09-18 15:40:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255189374] [2024-09-18 15:40:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:54,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:54,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:54,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255189374] [2024-09-18 15:40:54,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255189374] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:54,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544260960] [2024-09-18 15:40:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:40:54,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:54,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:54,239 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) [2024-09-18 15:40:54,241 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:40:54,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:40:54,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:54,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 15:40:54,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:54,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:54,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544260960] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:54,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:54,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2024-09-18 15:40:54,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217972801] [2024-09-18 15:40:54,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:54,914 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:40:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:40:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:40:54,915 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 22 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:40:59,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-18 15:41:03,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-18 15:41:07,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-18 15:41:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:08,045 INFO L93 Difference]: Finished difference Result 163 states and 220 transitions. [2024-09-18 15:41:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-18 15:41:08,046 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 22 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-18 15:41:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:08,047 INFO L225 Difference]: With dead ends: 163 [2024-09-18 15:41:08,047 INFO L226 Difference]: Without dead ends: 155 [2024-09-18 15:41:08,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 15:41:08,048 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:08,048 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 156 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 314 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2024-09-18 15:41:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-18 15:41:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2024-09-18 15:41:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 108 states have internal predecessors, (153), 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) [2024-09-18 15:41:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2024-09-18 15:41:08,096 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 157 transitions. Word has length 22 [2024-09-18 15:41:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:08,097 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 157 transitions. [2024-09-18 15:41:08,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 22 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:41:08,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 157 transitions. [2024-09-18 15:41:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-18 15:41:08,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:08,101 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:08,117 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:08,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:08,305 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:08,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1977285748, now seen corresponding path program 5 times [2024-09-18 15:41:08,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:08,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492178044] [2024-09-18 15:41:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:08,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:41:08,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:08,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492178044] [2024-09-18 15:41:08,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492178044] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:08,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843984919] [2024-09-18 15:41:08,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:41:08,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:08,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:08,398 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:41:08,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-18 15:41:08,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:08,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:41:08,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:41:08,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:41:08,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843984919] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:08,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:08,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-18 15:41:08,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952521124] [2024-09-18 15:41:08,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:08,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:41:08,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:41:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:41:08,655 INFO L87 Difference]: Start difference. First operand 113 states and 157 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2024-09-18 15:41:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:08,952 INFO L93 Difference]: Finished difference Result 161 states and 225 transitions. [2024-09-18 15:41:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:41:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 22 [2024-09-18 15:41:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:08,954 INFO L225 Difference]: With dead ends: 161 [2024-09-18 15:41:08,954 INFO L226 Difference]: Without dead ends: 139 [2024-09-18 15:41:08,955 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:41:08,955 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:08,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 136 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:41:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-18 15:41:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2024-09-18 15:41:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4259259259259258) internal successors, (154), 108 states have internal predecessors, (154), 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) [2024-09-18 15:41:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2024-09-18 15:41:09,001 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 22 [2024-09-18 15:41:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:09,001 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2024-09-18 15:41:09,001 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2024-09-18 15:41:09,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2024-09-18 15:41:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-18 15:41:09,002 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:09,003 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:09,019 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 15:41:09,206 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:09,207 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:09,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:09,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1179306556, now seen corresponding path program 6 times [2024-09-18 15:41:09,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:09,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991780703] [2024-09-18 15:41:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:09,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:09,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:41:09,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991780703] [2024-09-18 15:41:09,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991780703] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:09,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936273150] [2024-09-18 15:41:09,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:41:09,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:09,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:09,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:41:09,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-18 15:41:09,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:09,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:41:09,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:41:09,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-18 15:41:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936273150] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:09,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:09,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-18 15:41:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424624311] [2024-09-18 15:41:09,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:09,465 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 15:41:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 15:41:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:41:09,466 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2024-09-18 15:41:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:09,745 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2024-09-18 15:41:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:41:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 22 [2024-09-18 15:41:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:09,747 INFO L225 Difference]: With dead ends: 152 [2024-09-18 15:41:09,747 INFO L226 Difference]: Without dead ends: 137 [2024-09-18 15:41:09,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:41:09,748 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:09,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 201 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:41:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-18 15:41:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2024-09-18 15:41:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.4141414141414141) internal successors, (140), 99 states have internal predecessors, (140), 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) [2024-09-18 15:41:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2024-09-18 15:41:09,791 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 22 [2024-09-18 15:41:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:09,791 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2024-09-18 15:41:09,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2024-09-18 15:41:09,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2024-09-18 15:41:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 15:41:09,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:09,804 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:09,821 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:10,005 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 15:41:10,005 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:10,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash -440203297, now seen corresponding path program 7 times [2024-09-18 15:41:10,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:10,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713209342] [2024-09-18 15:41:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:10,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:10,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:10,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713209342] [2024-09-18 15:41:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713209342] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198630322] [2024-09-18 15:41:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:41:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:10,102 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:10,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:41:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:10,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:41:10,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:10,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:10,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198630322] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:10,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:10,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-18 15:41:10,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153913801] [2024-09-18 15:41:10,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:10,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:41:10,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:41:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:41:10,226 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-09-18 15:41:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:10,295 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2024-09-18 15:41:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:41:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 23 [2024-09-18 15:41:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:10,296 INFO L225 Difference]: With dead ends: 115 [2024-09-18 15:41:10,296 INFO L226 Difference]: Without dead ends: 99 [2024-09-18 15:41:10,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:41:10,298 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:10,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:41:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-18 15:41:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-18 15:41:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.434782608695652) internal successors, (132), 92 states have internal predecessors, (132), 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) [2024-09-18 15:41:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2024-09-18 15:41:10,335 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 23 [2024-09-18 15:41:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:10,335 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2024-09-18 15:41:10,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2024-09-18 15:41:10,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2024-09-18 15:41:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 15:41:10,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:10,338 INFO L216 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:10,354 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:10,541 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 15:41:10,542 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:10,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1573610800, now seen corresponding path program 8 times [2024-09-18 15:41:10,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:10,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127720863] [2024-09-18 15:41:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:10,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:10,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:41:10,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:10,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127720863] [2024-09-18 15:41:10,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127720863] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973086264] [2024-09-18 15:41:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:41:10,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:10,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:10,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:41:10,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:41:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:10,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 15:41:10,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:41:10,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:41:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973086264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:10,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:10,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-18 15:41:10,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631632153] [2024-09-18 15:41:10,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:10,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:41:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:41:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:41:10,939 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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) [2024-09-18 15:41:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:13,127 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2024-09-18 15:41:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-09-18 15:41:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 23 [2024-09-18 15:41:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:13,129 INFO L225 Difference]: With dead ends: 292 [2024-09-18 15:41:13,129 INFO L226 Difference]: Without dead ends: 265 [2024-09-18 15:41:13,131 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1448, Invalid=3954, Unknown=0, NotChecked=0, Total=5402 [2024-09-18 15:41:13,132 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 288 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:13,132 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 369 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:41:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-18 15:41:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 116. [2024-09-18 15:41:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.4234234234234233) internal successors, (158), 111 states have internal predecessors, (158), 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) [2024-09-18 15:41:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 162 transitions. [2024-09-18 15:41:13,175 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 162 transitions. Word has length 23 [2024-09-18 15:41:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:13,175 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 162 transitions. [2024-09-18 15:41:13,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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) [2024-09-18 15:41:13,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 162 transitions. [2024-09-18 15:41:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 15:41:13,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:13,176 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:13,191 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:13,377 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:41:13,377 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:13,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1610157924, now seen corresponding path program 9 times [2024-09-18 15:41:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:13,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061686105] [2024-09-18 15:41:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:13,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:13,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:13,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061686105] [2024-09-18 15:41:13,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061686105] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:13,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113219261] [2024-09-18 15:41:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:41:13,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:13,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:13,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:13,544 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:41:13,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:41:13,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:13,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 15:41:13,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:41:13,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:41:13,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113219261] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:13,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2024-09-18 15:41:13,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157457703] [2024-09-18 15:41:13,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:13,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-18 15:41:13,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:13,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-18 15:41:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:41:13,832 INFO L87 Difference]: Start difference. First operand 116 states and 162 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2024-09-18 15:41:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:13,982 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2024-09-18 15:41:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 15:41:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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 24 [2024-09-18 15:41:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:13,983 INFO L225 Difference]: With dead ends: 150 [2024-09-18 15:41:13,984 INFO L226 Difference]: Without dead ends: 145 [2024-09-18 15:41:13,984 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:41:13,985 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:13,985 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 110 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:41:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-18 15:41:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2024-09-18 15:41:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.4370370370370371) internal successors, (194), 135 states have internal predecessors, (194), 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) [2024-09-18 15:41:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 198 transitions. [2024-09-18 15:41:14,030 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 198 transitions. Word has length 24 [2024-09-18 15:41:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:14,030 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 198 transitions. [2024-09-18 15:41:14,031 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2024-09-18 15:41:14,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 198 transitions. [2024-09-18 15:41:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 15:41:14,032 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:14,032 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:14,049 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:14,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 15:41:14,233 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:14,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1973759170, now seen corresponding path program 2 times [2024-09-18 15:41:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:14,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341164274] [2024-09-18 15:41:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:14,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:14,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:14,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341164274] [2024-09-18 15:41:14,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341164274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:14,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282354822] [2024-09-18 15:41:14,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:41:14,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:14,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:14,338 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:14,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:41:14,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:41:14,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:14,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-18 15:41:14,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:14,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:14,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282354822] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:14,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:14,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-09-18 15:41:14,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384196854] [2024-09-18 15:41:14,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:14,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 15:41:14,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:14,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 15:41:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:41:14,592 INFO L87 Difference]: Start difference. First operand 140 states and 198 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2024-09-18 15:41:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:15,039 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2024-09-18 15:41:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 15:41:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 24 [2024-09-18 15:41:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:15,043 INFO L225 Difference]: With dead ends: 226 [2024-09-18 15:41:15,043 INFO L226 Difference]: Without dead ends: 203 [2024-09-18 15:41:15,044 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2024-09-18 15:41:15,044 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:15,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 226 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:41:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-18 15:41:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2024-09-18 15:41:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.417808219178082) internal successors, (207), 146 states have internal predecessors, (207), 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) [2024-09-18 15:41:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 211 transitions. [2024-09-18 15:41:15,113 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 211 transitions. Word has length 24 [2024-09-18 15:41:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:15,113 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 211 transitions. [2024-09-18 15:41:15,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2024-09-18 15:41:15,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 211 transitions. [2024-09-18 15:41:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:41:15,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:15,114 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:15,127 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-18 15:41:15,316 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 15:41:15,317 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:15,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1984219964, now seen corresponding path program 10 times [2024-09-18 15:41:15,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:15,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702105286] [2024-09-18 15:41:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:15,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:41:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:15,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702105286] [2024-09-18 15:41:15,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702105286] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:15,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969122752] [2024-09-18 15:41:15,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:41:15,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:15,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:15,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:15,772 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 15:41:15,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:41:15,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:15,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:41:15,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:16,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:16,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969122752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:16,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:16,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2024-09-18 15:41:16,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694830743] [2024-09-18 15:41:16,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:16,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-18 15:41:16,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:16,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-18 15:41:16,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:41:16,464 INFO L87 Difference]: Start difference. First operand 151 states and 211 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:41:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:17,458 INFO L93 Difference]: Finished difference Result 206 states and 269 transitions. [2024-09-18 15:41:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-18 15:41:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-18 15:41:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:17,459 INFO L225 Difference]: With dead ends: 206 [2024-09-18 15:41:17,459 INFO L226 Difference]: Without dead ends: 197 [2024-09-18 15:41:17,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:41:17,460 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:17,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 107 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:41:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-18 15:41:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2024-09-18 15:41:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.396103896103896) internal successors, (215), 154 states have internal predecessors, (215), 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) [2024-09-18 15:41:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 219 transitions. [2024-09-18 15:41:17,519 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 219 transitions. Word has length 26 [2024-09-18 15:41:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:17,519 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 219 transitions. [2024-09-18 15:41:17,519 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:41:17,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 219 transitions. [2024-09-18 15:41:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:41:17,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:17,520 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:17,534 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:17,724 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 15:41:17,725 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:17,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:17,725 INFO L85 PathProgramCache]: Analyzing trace with hash 584879828, now seen corresponding path program 11 times [2024-09-18 15:41:17,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:17,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737079270] [2024-09-18 15:41:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:17,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:17,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-18 15:41:17,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737079270] [2024-09-18 15:41:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737079270] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937590819] [2024-09-18 15:41:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:41:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:17,834 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:17,835 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 15:41:17,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-18 15:41:17,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:17,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-18 15:41:17,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-18 15:41:17,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-18 15:41:18,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937590819] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:18,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:18,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2024-09-18 15:41:18,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616390660] [2024-09-18 15:41:18,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:18,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:41:18,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:18,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:41:18,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:41:18,060 INFO L87 Difference]: Start difference. First operand 159 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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) [2024-09-18 15:41:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:18,519 INFO L93 Difference]: Finished difference Result 229 states and 302 transitions. [2024-09-18 15:41:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:41:18,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 26 [2024-09-18 15:41:18,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:18,522 INFO L225 Difference]: With dead ends: 229 [2024-09-18 15:41:18,522 INFO L226 Difference]: Without dead ends: 197 [2024-09-18 15:41:18,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2024-09-18 15:41:18,524 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:18,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 247 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:41:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-18 15:41:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 147. [2024-09-18 15:41:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3732394366197183) internal successors, (195), 142 states have internal predecessors, (195), 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) [2024-09-18 15:41:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2024-09-18 15:41:18,583 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 26 [2024-09-18 15:41:18,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:18,583 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2024-09-18 15:41:18,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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) [2024-09-18 15:41:18,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2024-09-18 15:41:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:41:18,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:18,585 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:18,599 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:18,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-18 15:41:18,789 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:18,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1890436396, now seen corresponding path program 3 times [2024-09-18 15:41:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:18,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285592420] [2024-09-18 15:41:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:18,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:41:18,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:18,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285592420] [2024-09-18 15:41:18,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285592420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480092641] [2024-09-18 15:41:18,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:41:18,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:18,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:18,951 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:18,953 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 15:41:18,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:41:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:18,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:41:18,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:41:19,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:41:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480092641] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:19,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:19,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2024-09-18 15:41:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825801974] [2024-09-18 15:41:19,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:19,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-18 15:41:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-18 15:41:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:41:19,447 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:41:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:19,983 INFO L93 Difference]: Finished difference Result 172 states and 233 transitions. [2024-09-18 15:41:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-18 15:41:19,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-18 15:41:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:19,984 INFO L225 Difference]: With dead ends: 172 [2024-09-18 15:41:19,984 INFO L226 Difference]: Without dead ends: 167 [2024-09-18 15:41:19,984 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:41:19,985 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:19,985 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 330 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:41:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-18 15:41:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 142. [2024-09-18 15:41:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3795620437956204) internal successors, (189), 137 states have internal predecessors, (189), 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) [2024-09-18 15:41:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 193 transitions. [2024-09-18 15:41:20,033 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 193 transitions. Word has length 26 [2024-09-18 15:41:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:20,033 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 193 transitions. [2024-09-18 15:41:20,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:41:20,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 193 transitions. [2024-09-18 15:41:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 15:41:20,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:20,034 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:20,049 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-18 15:41:20,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:20,235 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:20,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1345738961, now seen corresponding path program 12 times [2024-09-18 15:41:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968176757] [2024-09-18 15:41:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:20,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:41:20,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:20,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968176757] [2024-09-18 15:41:20,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968176757] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:20,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180493124] [2024-09-18 15:41:20,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:41:20,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:20,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:20,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:20,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 15:41:20,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-18 15:41:20,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:20,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 15:41:20,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:41:20,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:41:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180493124] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:20,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:20,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-18 15:41:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674150712] [2024-09-18 15:41:20,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:20,477 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:41:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:41:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:41:20,478 INFO L87 Difference]: Start difference. First operand 142 states and 193 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-09-18 15:41:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:20,566 INFO L93 Difference]: Finished difference Result 160 states and 212 transitions. [2024-09-18 15:41:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:41:20,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 27 [2024-09-18 15:41:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:20,567 INFO L225 Difference]: With dead ends: 160 [2024-09-18 15:41:20,567 INFO L226 Difference]: Without dead ends: 141 [2024-09-18 15:41:20,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:41:20,568 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:20,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:41:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-18 15:41:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2024-09-18 15:41:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 133 states have internal predecessors, (184), 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) [2024-09-18 15:41:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 188 transitions. [2024-09-18 15:41:20,620 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 188 transitions. Word has length 27 [2024-09-18 15:41:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:20,620 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 188 transitions. [2024-09-18 15:41:20,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-09-18 15:41:20,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 188 transitions. [2024-09-18 15:41:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 15:41:20,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:20,621 INFO L216 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:20,633 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:20,822 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:20,822 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:20,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1350871200, now seen corresponding path program 3 times [2024-09-18 15:41:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:20,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207687695] [2024-09-18 15:41:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:21,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:41:21,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:21,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207687695] [2024-09-18 15:41:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207687695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:21,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572559123] [2024-09-18 15:41:21,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:41:21,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:21,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:21,042 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:21,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 15:41:21,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-18 15:41:21,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:21,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 15:41:21,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:41:21,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:41:21,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572559123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:21,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:21,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-18 15:41:21,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773877428] [2024-09-18 15:41:21,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:21,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-18 15:41:21,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-18 15:41:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 15:41:21,486 INFO L87 Difference]: Start difference. First operand 138 states and 188 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2024-09-18 15:41:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:26,984 INFO L93 Difference]: Finished difference Result 722 states and 1069 transitions. [2024-09-18 15:41:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-18 15:41:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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 27 [2024-09-18 15:41:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:26,987 INFO L225 Difference]: With dead ends: 722 [2024-09-18 15:41:26,987 INFO L226 Difference]: Without dead ends: 680 [2024-09-18 15:41:26,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2024-09-18 15:41:26,989 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 1057 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:26,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 902 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-18 15:41:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2024-09-18 15:41:27,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 202. [2024-09-18 15:41:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.3908629441624365) internal successors, (274), 197 states have internal predecessors, (274), 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) [2024-09-18 15:41:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 278 transitions. [2024-09-18 15:41:27,090 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 278 transitions. Word has length 27 [2024-09-18 15:41:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:27,090 INFO L474 AbstractCegarLoop]: Abstraction has 202 states and 278 transitions. [2024-09-18 15:41:27,090 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2024-09-18 15:41:27,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 278 transitions. [2024-09-18 15:41:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:41:27,091 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:27,091 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:27,104 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-18 15:41:27,291 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-18 15:41:27,291 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:27,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1276317644, now seen corresponding path program 4 times [2024-09-18 15:41:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473432035] [2024-09-18 15:41:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:27,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-18 15:41:27,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:27,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473432035] [2024-09-18 15:41:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473432035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:27,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164518688] [2024-09-18 15:41:27,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:41:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:27,426 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:27,428 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-18 15:41:27,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:41:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:27,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-18 15:41:27,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 15:41:27,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 15:41:27,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164518688] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:27,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:27,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-09-18 15:41:27,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863412730] [2024-09-18 15:41:27,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:27,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-18 15:41:27,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:27,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-18 15:41:27,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:41:27,863 INFO L87 Difference]: Start difference. First operand 202 states and 278 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 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) [2024-09-18 15:41:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:29,315 INFO L93 Difference]: Finished difference Result 523 states and 746 transitions. [2024-09-18 15:41:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-18 15:41:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 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 28 [2024-09-18 15:41:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:29,320 INFO L225 Difference]: With dead ends: 523 [2024-09-18 15:41:29,320 INFO L226 Difference]: Without dead ends: 510 [2024-09-18 15:41:29,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=607, Invalid=2363, Unknown=0, NotChecked=0, Total=2970 [2024-09-18 15:41:29,323 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:29,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 333 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:41:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-09-18 15:41:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 359. [2024-09-18 15:41:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.5169491525423728) internal successors, (537), 354 states have internal predecessors, (537), 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) [2024-09-18 15:41:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 541 transitions. [2024-09-18 15:41:29,489 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 541 transitions. Word has length 28 [2024-09-18 15:41:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:29,489 INFO L474 AbstractCegarLoop]: Abstraction has 359 states and 541 transitions. [2024-09-18 15:41:29,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 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) [2024-09-18 15:41:29,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 541 transitions. [2024-09-18 15:41:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 15:41:29,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:29,490 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:29,504 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:29,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-18 15:41:29,691 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:29,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1971358316, now seen corresponding path program 13 times [2024-09-18 15:41:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347094545] [2024-09-18 15:41:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:30,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:41:30,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347094545] [2024-09-18 15:41:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347094545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752720567] [2024-09-18 15:41:30,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:41:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:30,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:30,256 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:30,258 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-18 15:41:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:30,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-18 15:41:30,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:41:31,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:41:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752720567] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:32,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:32,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 23] total 53 [2024-09-18 15:41:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207377942] [2024-09-18 15:41:32,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:32,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-18 15:41:32,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-18 15:41:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 15:41:32,115 INFO L87 Difference]: Start difference. First operand 359 states and 541 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:41:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:35,257 INFO L93 Difference]: Finished difference Result 547 states and 730 transitions. [2024-09-18 15:41:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-18 15:41:35,258 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-18 15:41:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:35,260 INFO L225 Difference]: With dead ends: 547 [2024-09-18 15:41:35,260 INFO L226 Difference]: Without dead ends: 526 [2024-09-18 15:41:35,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1293, Invalid=5847, Unknown=0, NotChecked=0, Total=7140 [2024-09-18 15:41:35,262 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:35,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 207 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-18 15:41:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2024-09-18 15:41:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 353. [2024-09-18 15:41:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.5229885057471264) internal successors, (530), 348 states have internal predecessors, (530), 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) [2024-09-18 15:41:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 534 transitions. [2024-09-18 15:41:35,434 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 534 transitions. Word has length 30 [2024-09-18 15:41:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:35,435 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 534 transitions. [2024-09-18 15:41:35,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:41:35,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 534 transitions. [2024-09-18 15:41:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-18 15:41:35,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:35,436 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:35,449 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:35,636 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-18 15:41:35,637 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:35,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:35,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1543645636, now seen corresponding path program 14 times [2024-09-18 15:41:35,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:35,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769757241] [2024-09-18 15:41:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:35,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:35,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:35,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:35,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769757241] [2024-09-18 15:41:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769757241] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:35,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7105531] [2024-09-18 15:41:35,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:41:35,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:35,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:35,780 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:35,782 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-18 15:41:35,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:41:35,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:35,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-18 15:41:35,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:35,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:41:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7105531] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:36,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2024-09-18 15:41:36,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743042578] [2024-09-18 15:41:36,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:36,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:41:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:41:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:41:36,118 INFO L87 Difference]: Start difference. First operand 353 states and 534 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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) [2024-09-18 15:41:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:36,755 INFO L93 Difference]: Finished difference Result 525 states and 720 transitions. [2024-09-18 15:41:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:41:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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 30 [2024-09-18 15:41:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:36,758 INFO L225 Difference]: With dead ends: 525 [2024-09-18 15:41:36,758 INFO L226 Difference]: Without dead ends: 454 [2024-09-18 15:41:36,758 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 15:41:36,759 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:36,759 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 288 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:41:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-09-18 15:41:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 338. [2024-09-18 15:41:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.5045045045045045) internal successors, (501), 333 states have internal predecessors, (501), 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) [2024-09-18 15:41:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 505 transitions. [2024-09-18 15:41:36,917 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 505 transitions. Word has length 30 [2024-09-18 15:41:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:36,917 INFO L474 AbstractCegarLoop]: Abstraction has 338 states and 505 transitions. [2024-09-18 15:41:36,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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) [2024-09-18 15:41:36,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 505 transitions. [2024-09-18 15:41:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:41:36,918 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:36,918 INFO L216 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:36,931 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:37,119 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-18 15:41:37,119 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:37,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1730942160, now seen corresponding path program 15 times [2024-09-18 15:41:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:37,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197656961] [2024-09-18 15:41:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:37,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:41:37,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:37,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197656961] [2024-09-18 15:41:37,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197656961] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:37,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62278983] [2024-09-18 15:41:37,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:41:37,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:37,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:37,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:37,379 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-18 15:41:37,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-18 15:41:37,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:37,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 15:41:37,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:41:37,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-18 15:41:37,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62278983] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:37,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:37,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-18 15:41:37,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171484904] [2024-09-18 15:41:37,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:37,957 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-18 15:41:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:37,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-18 15:41:37,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2024-09-18 15:41:37,958 INFO L87 Difference]: Start difference. First operand 338 states and 505 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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) [2024-09-18 15:41:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:52,621 INFO L93 Difference]: Finished difference Result 1266 states and 1894 transitions. [2024-09-18 15:41:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2024-09-18 15:41:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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 31 [2024-09-18 15:41:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:52,627 INFO L225 Difference]: With dead ends: 1266 [2024-09-18 15:41:52,627 INFO L226 Difference]: Without dead ends: 1233 [2024-09-18 15:41:52,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9190 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=6620, Invalid=17560, Unknown=0, NotChecked=0, Total=24180 [2024-09-18 15:41:52,632 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 1519 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:52,632 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 1224 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-18 15:41:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2024-09-18 15:41:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 389. [2024-09-18 15:41:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.5208333333333333) internal successors, (584), 384 states have internal predecessors, (584), 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) [2024-09-18 15:41:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 588 transitions. [2024-09-18 15:41:52,870 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 588 transitions. Word has length 31 [2024-09-18 15:41:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:52,870 INFO L474 AbstractCegarLoop]: Abstraction has 389 states and 588 transitions. [2024-09-18 15:41:52,870 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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) [2024-09-18 15:41:52,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 588 transitions. [2024-09-18 15:41:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:41:52,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:52,872 INFO L216 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:52,887 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:53,072 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-18 15:41:53,073 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:53,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1355997583, now seen corresponding path program 16 times [2024-09-18 15:41:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:53,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828984731] [2024-09-18 15:41:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:53,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:53,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-18 15:41:53,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828984731] [2024-09-18 15:41:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828984731] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289816815] [2024-09-18 15:41:53,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:41:53,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:53,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:53,255 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:41:53,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-18 15:41:53,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:41:53,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:53,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 15:41:53,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:41:53,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-18 15:41:53,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289816815] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:53,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:53,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 32 [2024-09-18 15:41:53,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829633188] [2024-09-18 15:41:53,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:53,690 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-18 15:41:53,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-18 15:41:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:41:53,691 INFO L87 Difference]: Start difference. First operand 389 states and 588 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 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) [2024-09-18 15:42:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:03,257 INFO L93 Difference]: Finished difference Result 977 states and 1248 transitions. [2024-09-18 15:42:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2024-09-18 15:42:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 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 33 [2024-09-18 15:42:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:03,261 INFO L225 Difference]: With dead ends: 977 [2024-09-18 15:42:03,261 INFO L226 Difference]: Without dead ends: 909 [2024-09-18 15:42:03,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10591 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=4448, Invalid=27414, Unknown=0, NotChecked=0, Total=31862 [2024-09-18 15:42:03,265 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 544 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:03,266 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 461 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 15:42:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2024-09-18 15:42:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 380. [2024-09-18 15:42:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.4666666666666666) internal successors, (550), 375 states have internal predecessors, (550), 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) [2024-09-18 15:42:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 554 transitions. [2024-09-18 15:42:03,543 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 554 transitions. Word has length 33 [2024-09-18 15:42:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:03,543 INFO L474 AbstractCegarLoop]: Abstraction has 380 states and 554 transitions. [2024-09-18 15:42:03,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 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) [2024-09-18 15:42:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 554 transitions. [2024-09-18 15:42:03,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 15:42:03,545 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:03,545 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:03,561 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-18 15:42:03,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-18 15:42:03,745 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:03,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1745547068, now seen corresponding path program 17 times [2024-09-18 15:42:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961317589] [2024-09-18 15:42:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:03,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:04,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:42:04,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961317589] [2024-09-18 15:42:04,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961317589] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:04,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342269455] [2024-09-18 15:42:04,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:42:04,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:04,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:04,341 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:42:04,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-18 15:42:04,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-18 15:42:04,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:42:04,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-18 15:42:04,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:42:05,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:42:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342269455] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:06,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:06,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 57 [2024-09-18 15:42:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39693585] [2024-09-18 15:42:06,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:06,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-18 15:42:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:06,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-18 15:42:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2024-09-18 15:42:06,392 INFO L87 Difference]: Start difference. First operand 380 states and 554 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:42:10,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-18 15:42:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:13,618 INFO L93 Difference]: Finished difference Result 537 states and 711 transitions. [2024-09-18 15:42:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-18 15:42:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-18 15:42:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:13,620 INFO L225 Difference]: With dead ends: 537 [2024-09-18 15:42:13,620 INFO L226 Difference]: Without dead ends: 513 [2024-09-18 15:42:13,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=694, Invalid=4276, Unknown=0, NotChecked=0, Total=4970 [2024-09-18 15:42:13,621 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 99 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:13,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 235 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 864 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-18 15:42:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-09-18 15:42:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 373. [2024-09-18 15:42:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.4728260869565217) internal successors, (542), 368 states have internal predecessors, (542), 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) [2024-09-18 15:42:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 546 transitions. [2024-09-18 15:42:13,891 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 546 transitions. Word has length 34 [2024-09-18 15:42:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:13,891 INFO L474 AbstractCegarLoop]: Abstraction has 373 states and 546 transitions. [2024-09-18 15:42:13,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:42:13,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 546 transitions. [2024-09-18 15:42:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:42:13,892 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:13,893 INFO L216 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:13,909 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-18 15:42:14,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-18 15:42:14,093 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2099284960, now seen corresponding path program 18 times [2024-09-18 15:42:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525079230] [2024-09-18 15:42:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:14,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:42:14,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525079230] [2024-09-18 15:42:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525079230] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762689255] [2024-09-18 15:42:14,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:42:14,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:14,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:14,403 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:42:14,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-18 15:42:14,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-18 15:42:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:42:14,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:42:14,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:42:14,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:42:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762689255] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:15,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:15,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-18 15:42:15,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540183147] [2024-09-18 15:42:15,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:15,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-18 15:42:15,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-18 15:42:15,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 15:42:15,251 INFO L87 Difference]: Start difference. First operand 373 states and 546 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 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) [2024-09-18 15:42:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:44,973 INFO L93 Difference]: Finished difference Result 1359 states and 1922 transitions. [2024-09-18 15:42:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2024-09-18 15:42:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 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 35 [2024-09-18 15:42:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:44,977 INFO L225 Difference]: With dead ends: 1359 [2024-09-18 15:42:44,977 INFO L226 Difference]: Without dead ends: 1303 [2024-09-18 15:42:44,980 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22334 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=12949, Invalid=42041, Unknown=0, NotChecked=0, Total=54990 [2024-09-18 15:42:44,981 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 1957 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:44,982 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1957 Valid, 1399 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-09-18 15:42:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2024-09-18 15:42:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 397. [2024-09-18 15:42:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 392 states have (on average 1.469387755102041) internal successors, (576), 392 states have internal predecessors, (576), 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) [2024-09-18 15:42:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 580 transitions. [2024-09-18 15:42:45,300 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 580 transitions. Word has length 35 [2024-09-18 15:42:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:45,300 INFO L474 AbstractCegarLoop]: Abstraction has 397 states and 580 transitions. [2024-09-18 15:42:45,300 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 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) [2024-09-18 15:42:45,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 580 transitions. [2024-09-18 15:42:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 15:42:45,301 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:45,301 INFO L216 NwaCegarLoop]: trace histogram [9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:45,314 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-18 15:42:45,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-18 15:42:45,502 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:45,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1960374636, now seen corresponding path program 19 times [2024-09-18 15:42:45,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:45,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510637297] [2024-09-18 15:42:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:45,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:45,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-18 15:42:45,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510637297] [2024-09-18 15:42:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510637297] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413682421] [2024-09-18 15:42:45,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:42:45,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:45,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:45,683 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:42:45,684 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-18 15:42:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:45,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 15:42:45,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:42:45,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:42:46,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413682421] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:46,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:46,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 36 [2024-09-18 15:42:46,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149253136] [2024-09-18 15:42:46,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:46,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-18 15:42:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:46,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-18 15:42:46,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2024-09-18 15:42:46,225 INFO L87 Difference]: Start difference. First operand 397 states and 580 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 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) [2024-09-18 15:43:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:02,022 INFO L93 Difference]: Finished difference Result 1046 states and 1322 transitions. [2024-09-18 15:43:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2024-09-18 15:43:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 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 36 [2024-09-18 15:43:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:02,025 INFO L225 Difference]: With dead ends: 1046 [2024-09-18 15:43:02,025 INFO L226 Difference]: Without dead ends: 973 [2024-09-18 15:43:02,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17784 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=6646, Invalid=43754, Unknown=0, NotChecked=0, Total=50400 [2024-09-18 15:43:02,028 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 804 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:02,028 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 440 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-18 15:43:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2024-09-18 15:43:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 389. [2024-09-18 15:43:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.4322916666666667) internal successors, (550), 384 states have internal predecessors, (550), 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) [2024-09-18 15:43:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 554 transitions. [2024-09-18 15:43:02,341 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 554 transitions. Word has length 36 [2024-09-18 15:43:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:02,341 INFO L474 AbstractCegarLoop]: Abstraction has 389 states and 554 transitions. [2024-09-18 15:43:02,341 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 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) [2024-09-18 15:43:02,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 554 transitions. [2024-09-18 15:43:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 15:43:02,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:02,342 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:02,354 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-18 15:43:02,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:02,542 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:02,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash -733195100, now seen corresponding path program 20 times [2024-09-18 15:43:02,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:02,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059512313] [2024-09-18 15:43:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:02,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:02,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 15:43:02,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:02,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059512313] [2024-09-18 15:43:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059512313] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603275387] [2024-09-18 15:43:02,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:43:02,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:02,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:02,831 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:43:02,832 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-18 15:43:02,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:43:02,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:02,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-18 15:43:02,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:43:02,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:43:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603275387] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:03,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:03,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2024-09-18 15:43:03,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848047408] [2024-09-18 15:43:03,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:03,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:43:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:43:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:43:03,147 INFO L87 Difference]: Start difference. First operand 389 states and 554 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 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) [2024-09-18 15:43:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:03,659 INFO L93 Difference]: Finished difference Result 459 states and 645 transitions. [2024-09-18 15:43:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 15:43:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 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 36 [2024-09-18 15:43:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:03,661 INFO L225 Difference]: With dead ends: 459 [2024-09-18 15:43:03,661 INFO L226 Difference]: Without dead ends: 454 [2024-09-18 15:43:03,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-09-18 15:43:03,662 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:03,663 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 258 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:43:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-09-18 15:43:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 443. [2024-09-18 15:43:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 438 states have (on average 1.3972602739726028) internal successors, (612), 438 states have internal predecessors, (612), 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) [2024-09-18 15:43:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 616 transitions. [2024-09-18 15:43:04,098 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 616 transitions. Word has length 36 [2024-09-18 15:43:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:04,098 INFO L474 AbstractCegarLoop]: Abstraction has 443 states and 616 transitions. [2024-09-18 15:43:04,099 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 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) [2024-09-18 15:43:04,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 616 transitions. [2024-09-18 15:43:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-18 15:43:04,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:04,100 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:04,114 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-18 15:43:04,300 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:04,300 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:04,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1055077100, now seen corresponding path program 21 times [2024-09-18 15:43:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:04,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360394807] [2024-09-18 15:43:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:04,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:43:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360394807] [2024-09-18 15:43:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360394807] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705144675] [2024-09-18 15:43:04,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:43:04,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:04,941 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:43:04,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-18 15:43:05,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:43:05,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:05,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-18 15:43:05,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:43:05,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:43:06,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705144675] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:06,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:06,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 42 [2024-09-18 15:43:06,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640290899] [2024-09-18 15:43:06,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:06,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-18 15:43:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-18 15:43:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2024-09-18 15:43:06,273 INFO L87 Difference]: Start difference. First operand 443 states and 616 transitions. Second operand has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 40 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:10,845 INFO L93 Difference]: Finished difference Result 683 states and 856 transitions. [2024-09-18 15:43:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-18 15:43:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 40 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-18 15:43:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:10,848 INFO L225 Difference]: With dead ends: 683 [2024-09-18 15:43:10,848 INFO L226 Difference]: Without dead ends: 656 [2024-09-18 15:43:10,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=469, Invalid=2723, Unknown=0, NotChecked=0, Total=3192 [2024-09-18 15:43:10,848 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:10,849 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 124 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:43:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2024-09-18 15:43:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 435. [2024-09-18 15:43:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.4023255813953488) internal successors, (603), 430 states have internal predecessors, (603), 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) [2024-09-18 15:43:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 607 transitions. [2024-09-18 15:43:11,208 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 607 transitions. Word has length 38 [2024-09-18 15:43:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:11,208 INFO L474 AbstractCegarLoop]: Abstraction has 435 states and 607 transitions. [2024-09-18 15:43:11,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 40 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:43:11,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 607 transitions. [2024-09-18 15:43:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 15:43:11,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:11,210 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:11,224 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-18 15:43:11,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:11,410 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:11,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:11,411 INFO L85 PathProgramCache]: Analyzing trace with hash -909913199, now seen corresponding path program 22 times [2024-09-18 15:43:11,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:11,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363246285] [2024-09-18 15:43:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:11,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:11,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-18 15:43:11,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363246285] [2024-09-18 15:43:11,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363246285] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396363185] [2024-09-18 15:43:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:43:11,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:11,621 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:43:11,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-18 15:43:11,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:43:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:11,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:43:11,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:43:11,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:43:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396363185] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:12,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 40 [2024-09-18 15:43:12,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204664931] [2024-09-18 15:43:12,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:12,217 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-18 15:43:12,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-18 15:43:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:43:12,218 INFO L87 Difference]: Start difference. First operand 435 states and 607 transitions. Second operand has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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) [2024-09-18 15:43:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:43:37,054 INFO L93 Difference]: Finished difference Result 1307 states and 1617 transitions. [2024-09-18 15:43:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2024-09-18 15:43:37,054 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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 39 [2024-09-18 15:43:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:43:37,059 INFO L225 Difference]: With dead ends: 1307 [2024-09-18 15:43:37,059 INFO L226 Difference]: Without dead ends: 1196 [2024-09-18 15:43:37,062 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29981 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=10043, Invalid=70329, Unknown=0, NotChecked=0, Total=80372 [2024-09-18 15:43:37,063 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 1251 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:43:37,063 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 711 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-18 15:43:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2024-09-18 15:43:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 428. [2024-09-18 15:43:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.364066193853428) internal successors, (577), 423 states have internal predecessors, (577), 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) [2024-09-18 15:43:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 581 transitions. [2024-09-18 15:43:37,495 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 581 transitions. Word has length 39 [2024-09-18 15:43:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:43:37,495 INFO L474 AbstractCegarLoop]: Abstraction has 428 states and 581 transitions. [2024-09-18 15:43:37,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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) [2024-09-18 15:43:37,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 581 transitions. [2024-09-18 15:43:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 15:43:37,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:43:37,497 INFO L216 NwaCegarLoop]: trace histogram [16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:43:37,509 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-18 15:43:37,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:37,697 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:43:37,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:43:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash -966933296, now seen corresponding path program 23 times [2024-09-18 15:43:37,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:43:37,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061438056] [2024-09-18 15:43:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:43:37,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:43:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:38,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:43:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:43:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:43:38,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:43:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061438056] [2024-09-18 15:43:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061438056] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:43:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17386933] [2024-09-18 15:43:38,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:43:38,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:43:38,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:43:38,042 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:43:38,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-18 15:43:38,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-18 15:43:38,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:43:38,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-18 15:43:38,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:43:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:43:38,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:43:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:43:38,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17386933] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:43:38,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:43:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-09-18 15:43:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994722391] [2024-09-18 15:43:38,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:43:38,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-18 15:43:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:43:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-18 15:43:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1584, Unknown=0, NotChecked=0, Total=1980 [2024-09-18 15:43:38,751 INFO L87 Difference]: Start difference. First operand 428 states and 581 transitions. Second operand has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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) [2024-09-18 15:44:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:31,064 INFO L93 Difference]: Finished difference Result 1630 states and 2224 transitions. [2024-09-18 15:44:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2024-09-18 15:44:31,064 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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 39 [2024-09-18 15:44:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:31,069 INFO L225 Difference]: With dead ends: 1630 [2024-09-18 15:44:31,069 INFO L226 Difference]: Without dead ends: 1528 [2024-09-18 15:44:31,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39048 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=19737, Invalid=72983, Unknown=0, NotChecked=0, Total=92720 [2024-09-18 15:44:31,072 INFO L434 NwaCegarLoop]: 75 mSDtfsCounter, 2378 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 1494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2378 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1494 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:31,072 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2378 Valid, 1565 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1494 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-09-18 15:44:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2024-09-18 15:44:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 451. [2024-09-18 15:44:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 446 states have (on average 1.3609865470852018) internal successors, (607), 446 states have internal predecessors, (607), 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) [2024-09-18 15:44:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 611 transitions. [2024-09-18 15:44:31,520 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 611 transitions. Word has length 39 [2024-09-18 15:44:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:31,520 INFO L474 AbstractCegarLoop]: Abstraction has 451 states and 611 transitions. [2024-09-18 15:44:31,520 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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) [2024-09-18 15:44:31,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 611 transitions. [2024-09-18 15:44:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-18 15:44:31,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:31,521 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:31,537 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-18 15:44:31,722 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-18 15:44:31,722 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:31,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1123997580, now seen corresponding path program 24 times [2024-09-18 15:44:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:31,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323141677] [2024-09-18 15:44:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:31,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:32,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-18 15:44:32,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:32,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323141677] [2024-09-18 15:44:32,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323141677] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:32,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206511182] [2024-09-18 15:44:32,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:44:32,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:32,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:32,068 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:44:32,069 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-18 15:44:32,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 15:44:32,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:32,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-18 15:44:32,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 15:44:32,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 15:44:32,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206511182] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:32,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:32,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 22 [2024-09-18 15:44:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702922738] [2024-09-18 15:44:32,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:32,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 15:44:32,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 15:44:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:44:32,664 INFO L87 Difference]: Start difference. First operand 451 states and 611 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2024-09-18 15:44:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:35,426 INFO L93 Difference]: Finished difference Result 750 states and 1028 transitions. [2024-09-18 15:44:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-18 15:44:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 40 [2024-09-18 15:44:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:35,429 INFO L225 Difference]: With dead ends: 750 [2024-09-18 15:44:35,429 INFO L226 Difference]: Without dead ends: 744 [2024-09-18 15:44:35,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=909, Invalid=2061, Unknown=0, NotChecked=0, Total=2970 [2024-09-18 15:44:35,430 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 227 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:35,430 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 330 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:44:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2024-09-18 15:44:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 552. [2024-09-18 15:44:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.4021937842778793) internal successors, (767), 547 states have internal predecessors, (767), 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) [2024-09-18 15:44:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 771 transitions. [2024-09-18 15:44:36,091 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 771 transitions. Word has length 40 [2024-09-18 15:44:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:36,091 INFO L474 AbstractCegarLoop]: Abstraction has 552 states and 771 transitions. [2024-09-18 15:44:36,091 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2024-09-18 15:44:36,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 771 transitions. [2024-09-18 15:44:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 15:44:36,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:36,093 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:36,109 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-18 15:44:36,297 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-18 15:44:36,298 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:36,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash -996913980, now seen corresponding path program 25 times [2024-09-18 15:44:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:36,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252621469] [2024-09-18 15:44:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:36,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:37,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:44:37,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252621469] [2024-09-18 15:44:37,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252621469] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:37,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658463865] [2024-09-18 15:44:37,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:44:37,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:37,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:37,238 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:44:37,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-18 15:44:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:37,364 WARN L260 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-18 15:44:37,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:44:39,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:44:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658463865] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:41,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:41,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 26] total 73 [2024-09-18 15:44:41,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762639850] [2024-09-18 15:44:41,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:41,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-18 15:44:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-18 15:44:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=4510, Unknown=0, NotChecked=0, Total=5256 [2024-09-18 15:44:41,192 INFO L87 Difference]: Start difference. First operand 552 states and 771 transitions. Second operand has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:44:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:51,079 INFO L93 Difference]: Finished difference Result 909 states and 1127 transitions. [2024-09-18 15:44:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-18 15:44:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-18 15:44:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:51,082 INFO L225 Difference]: With dead ends: 909 [2024-09-18 15:44:51,082 INFO L226 Difference]: Without dead ends: 879 [2024-09-18 15:44:51,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3776 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2257, Invalid=12023, Unknown=0, NotChecked=0, Total=14280 [2024-09-18 15:44:51,083 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 237 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:51,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 245 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-18 15:44:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2024-09-18 15:44:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 543. [2024-09-18 15:44:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.4070631970260223) internal successors, (757), 538 states have internal predecessors, (757), 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) [2024-09-18 15:44:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 761 transitions. [2024-09-18 15:44:51,652 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 761 transitions. Word has length 42 [2024-09-18 15:44:51,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:51,653 INFO L474 AbstractCegarLoop]: Abstraction has 543 states and 761 transitions. [2024-09-18 15:44:51,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:44:51,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 761 transitions. [2024-09-18 15:44:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 15:44:51,654 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:51,654 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:51,666 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-18 15:44:51,854 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-18 15:44:51,854 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:51,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 880955348, now seen corresponding path program 26 times [2024-09-18 15:44:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:51,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42561648] [2024-09-18 15:44:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:51,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:52,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-18 15:44:52,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:52,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42561648] [2024-09-18 15:44:52,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42561648] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:52,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396899937] [2024-09-18 15:44:52,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:44:52,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:52,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:52,104 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:44:52,105 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-18 15:44:52,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:44:52,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:52,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-18 15:44:52,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-18 15:44:52,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-18 15:44:52,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396899937] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:52,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:52,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 33 [2024-09-18 15:44:52,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048955622] [2024-09-18 15:44:52,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:52,518 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-18 15:44:52,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:52,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-18 15:44:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 15:44:52,519 INFO L87 Difference]: Start difference. First operand 543 states and 761 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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) [2024-09-18 15:44:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:54,975 INFO L93 Difference]: Finished difference Result 792 states and 1036 transitions. [2024-09-18 15:44:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-18 15:44:54,975 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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 42 [2024-09-18 15:44:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:54,977 INFO L225 Difference]: With dead ends: 792 [2024-09-18 15:44:54,977 INFO L226 Difference]: Without dead ends: 760 [2024-09-18 15:44:54,978 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=564, Invalid=4548, Unknown=0, NotChecked=0, Total=5112 [2024-09-18 15:44:54,978 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 78 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:54,978 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 810 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:44:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-18 15:44:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 527. [2024-09-18 15:44:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 522 states have (on average 1.4061302681992338) internal successors, (734), 522 states have internal predecessors, (734), 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) [2024-09-18 15:44:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 738 transitions. [2024-09-18 15:44:55,570 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 738 transitions. Word has length 42 [2024-09-18 15:44:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:55,570 INFO L474 AbstractCegarLoop]: Abstraction has 527 states and 738 transitions. [2024-09-18 15:44:55,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 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) [2024-09-18 15:44:55,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 738 transitions. [2024-09-18 15:44:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:44:55,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:55,572 INFO L216 NwaCegarLoop]: trace histogram [17, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:55,584 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-18 15:44:55,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-18 15:44:55,772 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:55,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1811734624, now seen corresponding path program 27 times [2024-09-18 15:44:55,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:55,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227318697] [2024-09-18 15:44:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:55,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:56,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 15:44:56,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227318697] [2024-09-18 15:44:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227318697] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840729291] [2024-09-18 15:44:56,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:44:56,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:56,195 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:44:56,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process