./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.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 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 18:13:23,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 18:13:23,250 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 18:13:23,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 18:13:23,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 18:13:23,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 18:13:23,287 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 18:13:23,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 18:13:23,287 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 18:13:23,288 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 18:13:23,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 18:13:23,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 18:13:23,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 18:13:23,292 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 18:13:23,292 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 18:13:23,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 18:13:23,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 18:13:23,293 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 18:13:23,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 18:13:23,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 18:13:23,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 18:13:23,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 18:13:23,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 18:13:23,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 18:13:23,296 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 18:13:23,297 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 18:13:23,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 18:13:23,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 18:13:23,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 18:13:23,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 18:13:23,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 18:13:23,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 18:13:23,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 18:13:23,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 18:13:23,301 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 18:13:23,301 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 18:13:23,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 18:13:23,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 18:13:23,308 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 18:13:23,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 18:13:23,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 18:13:23,309 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 18:13:23,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2024-09-12 18:13:23,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 18:13:23,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 18:13:23,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 18:13:23,641 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 18:13:23,641 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 18:13:23,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-12 18:13:25,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 18:13:25,453 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 18:13:25,454 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-12 18:13:25,460 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c9fccff45/dee8b84daf044fbab7be15be356cafc8/FLAGce908bcef [2024-09-12 18:13:25,473 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c9fccff45/dee8b84daf044fbab7be15be356cafc8 [2024-09-12 18:13:25,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 18:13:25,476 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 18:13:25,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 18:13:25,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 18:13:25,483 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 18:13:25,484 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,485 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff481f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25, skipping insertion in model container [2024-09-12 18:13:25,485 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,502 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 18:13:25,648 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-09-12 18:13:25,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 18:13:25,682 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 18:13:25,699 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-09-12 18:13:25,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 18:13:25,723 INFO L204 MainTranslator]: Completed translation [2024-09-12 18:13:25,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25 WrapperNode [2024-09-12 18:13:25,724 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 18:13:25,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 18:13:25,726 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 18:13:25,726 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 18:13:25,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,738 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,744 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 18:13:25,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 18:13:25,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 18:13:25,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 18:13:25,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 18:13:25,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,760 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,778 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]. [2024-09-12 18:13:25,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,784 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 18:13:25,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 18:13:25,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 18:13:25,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 18:13:25,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (1/1) ... [2024-09-12 18:13:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 18:13:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:25,841 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) [2024-09-12 18:13:25,845 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 [2024-09-12 18:13:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 18:13:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 18:13:25,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 18:13:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 18:13:25,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 18:13:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 18:13:25,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 18:13:25,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 18:13:25,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 18:13:25,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 18:13:25,960 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 18:13:25,963 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 18:13:26,133 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-12 18:13:26,133 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 18:13:26,161 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 18:13:26,161 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-12 18:13:26,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 06:13:26 BoogieIcfgContainer [2024-09-12 18:13:26,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 18:13:26,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 18:13:26,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 18:13:26,168 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 18:13:26,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 06:13:25" (1/3) ... [2024-09-12 18:13:26,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50588e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 06:13:26, skipping insertion in model container [2024-09-12 18:13:26,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:13:25" (2/3) ... [2024-09-12 18:13:26,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50588e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 06:13:26, skipping insertion in model container [2024-09-12 18:13:26,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 06:13:26" (3/3) ... [2024-09-12 18:13:26,172 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2024-09-12 18:13:26,188 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 18:13:26,188 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 18:13:26,251 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 18:13:26,261 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;@12ed6497, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 18:13:26,261 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 18:13:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2024-09-12 18:13:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 18:13:26,273 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:26,273 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:26,274 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:26,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash -294793433, now seen corresponding path program 1 times [2024-09-12 18:13:26,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:26,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219460214] [2024-09-12 18:13:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:26,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:26,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 18:13:26,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219460214] [2024-09-12 18:13:26,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219460214] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:13:26,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:13:26,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 18:13:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27843668] [2024-09-12 18:13:26,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:13:26,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 18:13:26,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 18:13:26,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 18:13:26,489 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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 6.0) internal successors, (12), 2 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) [2024-09-12 18:13:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:26,525 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2024-09-12 18:13:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 18:13:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2024-09-12 18:13:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:26,534 INFO L225 Difference]: With dead ends: 40 [2024-09-12 18:13:26,535 INFO L226 Difference]: Without dead ends: 17 [2024-09-12 18:13:26,538 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 [2024-09-12 18:13:26,541 INFO L434 NwaCegarLoop]: 26 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, 26 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 [2024-09-12 18:13:26,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 18:13:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-12 18:13:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-12 18:13:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2024-09-12 18:13:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-09-12 18:13:26,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 16 [2024-09-12 18:13:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:26,571 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-09-12 18:13:26,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2024-09-12 18:13:26,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-09-12 18:13:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 18:13:26,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:26,573 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:26,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 18:13:26,573 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:26,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash -951970017, now seen corresponding path program 1 times [2024-09-12 18:13:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:26,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398229186] [2024-09-12 18:13:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:26,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 18:13:26,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:26,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398229186] [2024-09-12 18:13:26,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398229186] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:13:26,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:13:26,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 18:13:26,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156131947] [2024-09-12 18:13:26,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:13:26,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 18:13:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 18:13:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 18:13:26,862 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2024-09-12 18:13:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:26,946 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2024-09-12 18:13:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 18:13:26,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2024-09-12 18:13:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:26,948 INFO L225 Difference]: With dead ends: 33 [2024-09-12 18:13:26,949 INFO L226 Difference]: Without dead ends: 22 [2024-09-12 18:13:26,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 18:13:26,952 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:26,953 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:13:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-12 18:13:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-12 18:13:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2024-09-12 18:13:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-09-12 18:13:26,964 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2024-09-12 18:13:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:26,964 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-09-12 18:13:26,965 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2024-09-12 18:13:26,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-09-12 18:13:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 18:13:26,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:26,966 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:26,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 18:13:26,967 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:26,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 589238346, now seen corresponding path program 1 times [2024-09-12 18:13:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669850867] [2024-09-12 18:13:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 18:13:27,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:27,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669850867] [2024-09-12 18:13:27,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669850867] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:13:27,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:13:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 18:13:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590593274] [2024-09-12 18:13:27,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:13:27,042 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 18:13:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:27,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 18:13:27,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 18:13:27,046 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-12 18:13:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:27,087 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2024-09-12 18:13:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 18:13:27,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 [2024-09-12 18:13:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:27,089 INFO L225 Difference]: With dead ends: 46 [2024-09-12 18:13:27,089 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 18:13:27,089 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 18:13:27,090 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:27,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 18:13:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 18:13:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 18:13:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2024-09-12 18:13:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2024-09-12 18:13:27,105 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 17 [2024-09-12 18:13:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:27,105 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2024-09-12 18:13:27,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-12 18:13:27,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2024-09-12 18:13:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 18:13:27,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:27,111 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:27,112 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 18:13:27,112 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:27,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1992066745, now seen corresponding path program 1 times [2024-09-12 18:13:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151026177] [2024-09-12 18:13:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 18:13:27,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:27,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151026177] [2024-09-12 18:13:27,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151026177] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:13:27,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:13:27,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 18:13:27,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967940191] [2024-09-12 18:13:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:13:27,175 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 18:13:27,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 18:13:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 18:13:27,177 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-12 18:13:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:27,204 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2024-09-12 18:13:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 18:13:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 [2024-09-12 18:13:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:27,205 INFO L225 Difference]: With dead ends: 48 [2024-09-12 18:13:27,205 INFO L226 Difference]: Without dead ends: 36 [2024-09-12 18:13:27,206 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 18:13:27,207 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:27,207 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 18:13:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-12 18:13:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-12 18:13:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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) [2024-09-12 18:13:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2024-09-12 18:13:27,219 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 17 [2024-09-12 18:13:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:27,220 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2024-09-12 18:13:27,220 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-12 18:13:27,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2024-09-12 18:13:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 18:13:27,221 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:27,222 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:27,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 18:13:27,222 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:27,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1567147830, now seen corresponding path program 1 times [2024-09-12 18:13:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:27,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472794460] [2024-09-12 18:13:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:27,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:27,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:27,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472794460] [2024-09-12 18:13:27,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472794460] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:13:27,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:13:27,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 18:13:27,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779480387] [2024-09-12 18:13:27,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:13:27,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 18:13:27,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 18:13:27,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 18:13:27,295 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-12 18:13:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:27,349 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2024-09-12 18:13:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 18:13:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2024-09-12 18:13:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:27,352 INFO L225 Difference]: With dead ends: 46 [2024-09-12 18:13:27,352 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 18:13:27,352 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 [2024-09-12 18:13:27,353 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:27,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 18:13:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 18:13:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 18:13:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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) [2024-09-12 18:13:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-09-12 18:13:27,363 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 19 [2024-09-12 18:13:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:27,363 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-09-12 18:13:27,363 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-12 18:13:27,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-09-12 18:13:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 18:13:27,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:27,364 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:27,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 18:13:27,365 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:27,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1052281419, now seen corresponding path program 1 times [2024-09-12 18:13:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:27,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27757490] [2024-09-12 18:13:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:27,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27757490] [2024-09-12 18:13:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27757490] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923841792] [2024-09-12 18:13:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:27,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:27,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:27,503 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) [2024-09-12 18:13:27,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 18:13:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:27,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 18:13:27,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:27,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:27,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923841792] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:27,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-12 18:13:27,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-12 18:13:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478367603] [2024-09-12 18:13:27,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:13:27,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 18:13:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 18:13:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 18:13:27,669 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-12 18:13:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:27,718 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-09-12 18:13:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 18:13:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2024-09-12 18:13:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:27,719 INFO L225 Difference]: With dead ends: 40 [2024-09-12 18:13:27,720 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 18:13:27,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 18:13:27,721 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:27,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 18:13:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 18:13:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-12 18:13:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 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) [2024-09-12 18:13:27,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-09-12 18:13:27,736 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2024-09-12 18:13:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:27,737 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-09-12 18:13:27,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-12 18:13:27,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-09-12 18:13:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 18:13:27,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:27,739 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:27,756 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 18:13:27,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 18:13:27,943 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:27,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash -61419458, now seen corresponding path program 1 times [2024-09-12 18:13:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:27,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145916615] [2024-09-12 18:13:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:28,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 18:13:28,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145916615] [2024-09-12 18:13:28,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145916615] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:28,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755927594] [2024-09-12 18:13:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:28,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:28,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:28,028 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) [2024-09-12 18:13:28,030 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 18:13:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:28,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 18:13:28,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 18:13:28,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 18:13:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755927594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:28,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:28,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2024-09-12 18:13:28,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705291586] [2024-09-12 18:13:28,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:28,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 18:13:28,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 18:13:28,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-09-12 18:13:28,196 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2024-09-12 18:13:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:28,367 INFO L93 Difference]: Finished difference Result 95 states and 148 transitions. [2024-09-12 18:13:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 18:13:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 [2024-09-12 18:13:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:28,371 INFO L225 Difference]: With dead ends: 95 [2024-09-12 18:13:28,371 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 18:13:28,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-09-12 18:13:28,372 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:28,373 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:13:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 18:13:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2024-09-12 18:13:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 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) [2024-09-12 18:13:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2024-09-12 18:13:28,393 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 20 [2024-09-12 18:13:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:28,393 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2024-09-12 18:13:28,393 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2024-09-12 18:13:28,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2024-09-12 18:13:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 18:13:28,394 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:28,394 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:28,423 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 18:13:28,595 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 18:13:28,595 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:28,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1324513826, now seen corresponding path program 1 times [2024-09-12 18:13:28,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:28,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542363002] [2024-09-12 18:13:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:28,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:28,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542363002] [2024-09-12 18:13:28,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542363002] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522311287] [2024-09-12 18:13:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:28,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:28,684 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) [2024-09-12 18:13:28,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 18:13:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:28,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 18:13:28,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 18:13:28,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 18:13:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522311287] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:28,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:28,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-12 18:13:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416679394] [2024-09-12 18:13:28,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:28,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 18:13:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 18:13:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-12 18:13:28,811 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2024-09-12 18:13:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:28,934 INFO L93 Difference]: Finished difference Result 174 states and 264 transitions. [2024-09-12 18:13:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 18:13:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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 [2024-09-12 18:13:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:28,937 INFO L225 Difference]: With dead ends: 174 [2024-09-12 18:13:28,937 INFO L226 Difference]: Without dead ends: 150 [2024-09-12 18:13:28,937 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-12 18:13:28,938 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:28,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 83 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:13:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-12 18:13:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 87. [2024-09-12 18:13:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.5) internal successors, (123), 82 states have internal predecessors, (123), 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) [2024-09-12 18:13:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2024-09-12 18:13:28,991 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 20 [2024-09-12 18:13:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:28,992 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2024-09-12 18:13:28,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2024-09-12 18:13:28,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2024-09-12 18:13:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 18:13:28,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:28,994 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:29,013 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 18:13:29,198 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 18:13:29,199 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:29,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1423642650, now seen corresponding path program 1 times [2024-09-12 18:13:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785804034] [2024-09-12 18:13:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:29,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:29,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785804034] [2024-09-12 18:13:29,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785804034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31533955] [2024-09-12 18:13:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:29,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:29,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:29,296 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) [2024-09-12 18:13:29,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 18:13:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:29,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 18:13:29,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:29,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:29,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31533955] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:29,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:29,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-12 18:13:29,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105173007] [2024-09-12 18:13:29,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:29,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 18:13:29,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:29,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 18:13:29,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 18:13:29,442 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2024-09-12 18:13:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:29,760 INFO L93 Difference]: Finished difference Result 162 states and 239 transitions. [2024-09-12 18:13:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 18:13:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 [2024-09-12 18:13:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:29,762 INFO L225 Difference]: With dead ends: 162 [2024-09-12 18:13:29,762 INFO L226 Difference]: Without dead ends: 127 [2024-09-12 18:13:29,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-12 18:13:29,764 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:29,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 77 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:13:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-12 18:13:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2024-09-12 18:13:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 101 states have internal predecessors, (146), 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) [2024-09-12 18:13:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 150 transitions. [2024-09-12 18:13:29,809 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 150 transitions. Word has length 21 [2024-09-12 18:13:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:29,809 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 150 transitions. [2024-09-12 18:13:29,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2024-09-12 18:13:29,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 150 transitions. [2024-09-12 18:13:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 18:13:29,811 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:29,811 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:29,828 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 18:13:30,011 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:30,012 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:30,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1756794400, now seen corresponding path program 1 times [2024-09-12 18:13:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:30,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902564786] [2024-09-12 18:13:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:30,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:30,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:30,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:30,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902564786] [2024-09-12 18:13:30,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902564786] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:30,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122859137] [2024-09-12 18:13:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:30,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:30,179 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) [2024-09-12 18:13:30,181 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 18:13:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:30,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 18:13:30,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:13:30,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:13:30,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122859137] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:30,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-12 18:13:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714988517] [2024-09-12 18:13:30,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:30,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 18:13:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 18:13:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-12 18:13:30,341 INFO L87 Difference]: Start difference. First operand 106 states and 150 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 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) [2024-09-12 18:13:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:30,454 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-12 18:13:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 18:13:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 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 [2024-09-12 18:13:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:30,456 INFO L225 Difference]: With dead ends: 136 [2024-09-12 18:13:30,456 INFO L226 Difference]: Without dead ends: 120 [2024-09-12 18:13:30,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-12 18:13:30,457 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:30,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:13:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-12 18:13:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2024-09-12 18:13:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.4948453608247423) internal successors, (145), 97 states have internal predecessors, (145), 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) [2024-09-12 18:13:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 149 transitions. [2024-09-12 18:13:30,495 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 149 transitions. Word has length 22 [2024-09-12 18:13:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:30,495 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 149 transitions. [2024-09-12 18:13:30,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 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) [2024-09-12 18:13:30,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 149 transitions. [2024-09-12 18:13:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 18:13:30,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:30,497 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:30,514 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 18:13:30,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 18:13:30,698 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:30,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 731418570, now seen corresponding path program 2 times [2024-09-12 18:13:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:30,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508245744] [2024-09-12 18:13:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:30,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 18:13:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508245744] [2024-09-12 18:13:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508245744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091463809] [2024-09-12 18:13:30,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 18:13:30,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:30,796 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) [2024-09-12 18:13:30,797 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 18:13:30,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 18:13:30,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:30,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 18:13:30,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 18:13:30,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 18:13:30,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091463809] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:30,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:30,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-12 18:13:30,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695640612] [2024-09-12 18:13:30,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:30,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 18:13:30,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:30,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 18:13:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-12 18:13:30,952 INFO L87 Difference]: Start difference. First operand 102 states and 149 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2024-09-12 18:13:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:31,156 INFO L93 Difference]: Finished difference Result 143 states and 210 transitions. [2024-09-12 18:13:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 18:13:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 [2024-09-12 18:13:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:31,158 INFO L225 Difference]: With dead ends: 143 [2024-09-12 18:13:31,158 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 18:13:31,159 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-12 18:13:31,159 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:31,160 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:13:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 18:13:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2024-09-12 18:13:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4761904761904763) internal successors, (124), 84 states have internal predecessors, (124), 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) [2024-09-12 18:13:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 128 transitions. [2024-09-12 18:13:31,191 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 128 transitions. Word has length 23 [2024-09-12 18:13:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:31,191 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 128 transitions. [2024-09-12 18:13:31,191 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2024-09-12 18:13:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 128 transitions. [2024-09-12 18:13:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 18:13:31,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:31,193 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:31,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 18:13:31,393 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 18:13:31,394 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:31,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:31,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1260027713, now seen corresponding path program 3 times [2024-09-12 18:13:31,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:31,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143567649] [2024-09-12 18:13:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:31,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:31,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:31,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:31,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143567649] [2024-09-12 18:13:31,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143567649] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:31,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726448827] [2024-09-12 18:13:31,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 18:13:31,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:31,547 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) [2024-09-12 18:13:31,548 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 18:13:31,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 18:13:31,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:31,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 18:13:31,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 18:13:31,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 18:13:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726448827] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:31,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:31,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-12 18:13:31,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402459559] [2024-09-12 18:13:31,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:31,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 18:13:31,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 18:13:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-09-12 18:13:31,831 INFO L87 Difference]: Start difference. First operand 89 states and 128 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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) [2024-09-12 18:13:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:32,201 INFO L93 Difference]: Finished difference Result 146 states and 212 transitions. [2024-09-12 18:13:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 18:13:32,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 24 [2024-09-12 18:13:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:32,202 INFO L225 Difference]: With dead ends: 146 [2024-09-12 18:13:32,202 INFO L226 Difference]: Without dead ends: 89 [2024-09-12 18:13:32,203 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-09-12 18:13:32,204 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:32,204 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 192 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 18:13:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-12 18:13:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2024-09-12 18:13:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 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) [2024-09-12 18:13:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2024-09-12 18:13:32,247 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 24 [2024-09-12 18:13:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:32,248 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2024-09-12 18:13:32,248 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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) [2024-09-12 18:13:32,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2024-09-12 18:13:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 18:13:32,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:32,251 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:32,268 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 18:13:32,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:32,456 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:32,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2144926014, now seen corresponding path program 4 times [2024-09-12 18:13:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877338640] [2024-09-12 18:13:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:32,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 18:13:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877338640] [2024-09-12 18:13:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877338640] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070427985] [2024-09-12 18:13:32,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 18:13:32,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:32,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:32,573 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) [2024-09-12 18:13:32,575 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 18:13:32,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 18:13:32,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:32,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 18:13:32,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:13:32,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 18:13:32,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070427985] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:32,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:32,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 13 [2024-09-12 18:13:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762600349] [2024-09-12 18:13:32,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:32,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 18:13:32,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 18:13:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-12 18:13:32,718 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2024-09-12 18:13:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:33,228 INFO L93 Difference]: Finished difference Result 175 states and 263 transitions. [2024-09-12 18:13:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 18:13:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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 [2024-09-12 18:13:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:33,230 INFO L225 Difference]: With dead ends: 175 [2024-09-12 18:13:33,230 INFO L226 Difference]: Without dead ends: 140 [2024-09-12 18:13:33,231 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-09-12 18:13:33,231 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:33,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 180 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 18:13:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-12 18:13:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2024-09-12 18:13:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 102 states have internal predecessors, (147), 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) [2024-09-12 18:13:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2024-09-12 18:13:33,268 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 26 [2024-09-12 18:13:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:33,269 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2024-09-12 18:13:33,269 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2024-09-12 18:13:33,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2024-09-12 18:13:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 18:13:33,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:33,270 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:33,289 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 18:13:33,474 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:33,475 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:33,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash -52963974, now seen corresponding path program 5 times [2024-09-12 18:13:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959956690] [2024-09-12 18:13:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:33,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:33,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:33,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:33,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959956690] [2024-09-12 18:13:33,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959956690] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:33,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897948003] [2024-09-12 18:13:33,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 18:13:33,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:33,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:33,667 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) [2024-09-12 18:13:33,668 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 18:13:33,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 18:13:33,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:33,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 18:13:33,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 18:13:33,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 18:13:33,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897948003] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:33,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:33,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 22 [2024-09-12 18:13:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038284332] [2024-09-12 18:13:33,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:33,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 18:13:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 18:13:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-09-12 18:13:33,976 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2024-09-12 18:13:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:34,683 INFO L93 Difference]: Finished difference Result 183 states and 271 transitions. [2024-09-12 18:13:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 18:13:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 27 [2024-09-12 18:13:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:34,685 INFO L225 Difference]: With dead ends: 183 [2024-09-12 18:13:34,685 INFO L226 Difference]: Without dead ends: 146 [2024-09-12 18:13:34,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 18:13:34,686 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:34,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 199 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 18:13:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-12 18:13:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 116. [2024-09-12 18:13:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 111 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) [2024-09-12 18:13:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2024-09-12 18:13:34,725 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 27 [2024-09-12 18:13:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:34,726 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2024-09-12 18:13:34,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2024-09-12 18:13:34,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2024-09-12 18:13:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 18:13:34,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:34,727 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:34,752 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 18:13:34,931 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 18:13:34,932 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:34,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:34,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1202238023, now seen corresponding path program 1 times [2024-09-12 18:13:34,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:34,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398810351] [2024-09-12 18:13:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:34,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:35,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 18:13:35,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:35,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398810351] [2024-09-12 18:13:35,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398810351] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:35,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079040138] [2024-09-12 18:13:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:35,057 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) [2024-09-12 18:13:35,060 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 18:13:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:35,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 18:13:35,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 18:13:35,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 18:13:35,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079040138] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:35,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:35,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 8] total 20 [2024-09-12 18:13:35,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362051827] [2024-09-12 18:13:35,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:35,339 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 18:13:35,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:35,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 18:13:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-09-12 18:13:35,340 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2024-09-12 18:13:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:36,154 INFO L93 Difference]: Finished difference Result 223 states and 327 transitions. [2024-09-12 18:13:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 18:13:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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 27 [2024-09-12 18:13:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:36,156 INFO L225 Difference]: With dead ends: 223 [2024-09-12 18:13:36,156 INFO L226 Difference]: Without dead ends: 173 [2024-09-12 18:13:36,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 18:13:36,157 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:36,158 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 214 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 18:13:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-12 18:13:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 142. [2024-09-12 18:13:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3941605839416058) internal successors, (191), 137 states have internal predecessors, (191), 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) [2024-09-12 18:13:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2024-09-12 18:13:36,206 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 27 [2024-09-12 18:13:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:36,207 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2024-09-12 18:13:36,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2024-09-12 18:13:36,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2024-09-12 18:13:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 18:13:36,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:36,208 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:36,226 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 18:13:36,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 18:13:36,413 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:36,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:36,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1489538522, now seen corresponding path program 2 times [2024-09-12 18:13:36,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:36,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145233212] [2024-09-12 18:13:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:36,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 18:13:36,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:36,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145233212] [2024-09-12 18:13:36,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145233212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:36,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013466010] [2024-09-12 18:13:36,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 18:13:36,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:36,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:36,560 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) [2024-09-12 18:13:36,562 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 18:13:36,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 18:13:36,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:36,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 18:13:36,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 18:13:36,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 18:13:36,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013466010] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:36,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:36,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2024-09-12 18:13:36,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99585209] [2024-09-12 18:13:36,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:36,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 18:13:36,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 18:13:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-09-12 18:13:36,805 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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) [2024-09-12 18:13:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:37,119 INFO L93 Difference]: Finished difference Result 333 states and 496 transitions. [2024-09-12 18:13:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 18:13:37,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 27 [2024-09-12 18:13:37,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:37,121 INFO L225 Difference]: With dead ends: 333 [2024-09-12 18:13:37,121 INFO L226 Difference]: Without dead ends: 265 [2024-09-12 18:13:37,122 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2024-09-12 18:13:37,122 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:37,123 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 230 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 18:13:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-12 18:13:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 193. [2024-09-12 18:13:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.372340425531915) internal successors, (258), 188 states have internal predecessors, (258), 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) [2024-09-12 18:13:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 262 transitions. [2024-09-12 18:13:37,180 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 262 transitions. Word has length 27 [2024-09-12 18:13:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:37,180 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 262 transitions. [2024-09-12 18:13:37,181 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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) [2024-09-12 18:13:37,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 262 transitions. [2024-09-12 18:13:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 18:13:37,182 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:37,182 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:37,199 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 18:13:37,386 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 18:13:37,387 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:37,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2067363207, now seen corresponding path program 2 times [2024-09-12 18:13:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:37,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473756097] [2024-09-12 18:13:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:37,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:37,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 18:13:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473756097] [2024-09-12 18:13:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473756097] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609450640] [2024-09-12 18:13:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 18:13:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:37,586 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) [2024-09-12 18:13:37,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 18:13:37,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 18:13:37,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:37,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 18:13:37,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 18:13:37,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 18:13:37,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609450640] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:37,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:37,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2024-09-12 18:13:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393770272] [2024-09-12 18:13:37,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:37,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 18:13:37,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:37,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 18:13:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-09-12 18:13:37,811 INFO L87 Difference]: Start difference. First operand 193 states and 262 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2024-09-12 18:13:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:38,776 INFO L93 Difference]: Finished difference Result 431 states and 663 transitions. [2024-09-12 18:13:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-12 18:13:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 29 [2024-09-12 18:13:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:38,780 INFO L225 Difference]: With dead ends: 431 [2024-09-12 18:13:38,780 INFO L226 Difference]: Without dead ends: 374 [2024-09-12 18:13:38,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=655, Invalid=2537, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 18:13:38,782 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:38,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 271 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 18:13:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-09-12 18:13:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 266. [2024-09-12 18:13:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.3754789272030652) internal successors, (359), 261 states have internal predecessors, (359), 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) [2024-09-12 18:13:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 363 transitions. [2024-09-12 18:13:38,857 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 363 transitions. Word has length 29 [2024-09-12 18:13:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:38,857 INFO L474 AbstractCegarLoop]: Abstraction has 266 states and 363 transitions. [2024-09-12 18:13:38,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2024-09-12 18:13:38,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 363 transitions. [2024-09-12 18:13:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 18:13:38,859 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:38,859 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:38,872 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 18:13:39,059 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 18:13:39,060 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:39,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash 997958656, now seen corresponding path program 3 times [2024-09-12 18:13:39,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:39,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589663660] [2024-09-12 18:13:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:39,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:39,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 18:13:39,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:39,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589663660] [2024-09-12 18:13:39,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589663660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:39,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968024038] [2024-09-12 18:13:39,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 18:13:39,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:39,236 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) [2024-09-12 18:13:39,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 18:13:39,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 18:13:39,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:39,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 18:13:39,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 18:13:39,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 18:13:39,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968024038] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:39,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:39,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2024-09-12 18:13:39,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359325699] [2024-09-12 18:13:39,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:39,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 18:13:39,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 18:13:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2024-09-12 18:13:39,441 INFO L87 Difference]: Start difference. First operand 266 states and 363 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2024-09-12 18:13:47,504 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:13:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:56,069 INFO L93 Difference]: Finished difference Result 792 states and 1162 transitions. [2024-09-12 18:13:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 18:13:56,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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 [2024-09-12 18:13:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:56,073 INFO L225 Difference]: With dead ends: 792 [2024-09-12 18:13:56,073 INFO L226 Difference]: Without dead ends: 689 [2024-09-12 18:13:56,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2024-09-12 18:13:56,075 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:56,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 205 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 18:13:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2024-09-12 18:13:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 333. [2024-09-12 18:13:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.375) internal successors, (451), 328 states have internal predecessors, (451), 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) [2024-09-12 18:13:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 455 transitions. [2024-09-12 18:13:56,217 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 455 transitions. Word has length 30 [2024-09-12 18:13:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:56,217 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 455 transitions. [2024-09-12 18:13:56,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2024-09-12 18:13:56,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:56,218 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 455 transitions. [2024-09-12 18:13:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 18:13:56,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:56,219 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:56,236 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 18:13:56,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 18:13:56,424 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:56,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1400929057, now seen corresponding path program 2 times [2024-09-12 18:13:56,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:56,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779371554] [2024-09-12 18:13:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:56,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:56,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 18:13:56,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779371554] [2024-09-12 18:13:56,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779371554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:56,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967768558] [2024-09-12 18:13:56,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 18:13:56,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:56,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:56,580 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) [2024-09-12 18:13:56,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 18:13:56,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 18:13:56,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:56,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 18:13:56,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 18:13:56,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 18:13:56,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967768558] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:56,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 5] total 15 [2024-09-12 18:13:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739245011] [2024-09-12 18:13:56,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:56,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 18:13:56,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 18:13:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-12 18:13:56,700 INFO L87 Difference]: Start difference. First operand 333 states and 455 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-09-12 18:13:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:57,294 INFO L93 Difference]: Finished difference Result 710 states and 1014 transitions. [2024-09-12 18:13:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 18:13:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 [2024-09-12 18:13:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:57,297 INFO L225 Difference]: With dead ends: 710 [2024-09-12 18:13:57,297 INFO L226 Difference]: Without dead ends: 571 [2024-09-12 18:13:57,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-09-12 18:13:57,298 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:57,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 299 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 18:13:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2024-09-12 18:13:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 427. [2024-09-12 18:13:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 422 states have (on average 1.3578199052132702) internal successors, (573), 422 states have internal predecessors, (573), 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) [2024-09-12 18:13:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 577 transitions. [2024-09-12 18:13:57,478 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 577 transitions. Word has length 30 [2024-09-12 18:13:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:57,478 INFO L474 AbstractCegarLoop]: Abstraction has 427 states and 577 transitions. [2024-09-12 18:13:57,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-09-12 18:13:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 577 transitions. [2024-09-12 18:13:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 18:13:57,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:57,480 INFO L216 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:57,497 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-12 18:13:57,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:57,681 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:57,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash -184327170, now seen corresponding path program 4 times [2024-09-12 18:13:57,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:57,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068294816] [2024-09-12 18:13:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:57,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 18:13:57,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:57,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068294816] [2024-09-12 18:13:57,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068294816] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:57,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114079379] [2024-09-12 18:13:57,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 18:13:57,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:57,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:57,861 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) [2024-09-12 18:13:57,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 18:13:57,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 18:13:57,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:57,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 18:13:57,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 18:13:57,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 18:13:58,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114079379] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:58,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:58,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 16 [2024-09-12 18:13:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652103414] [2024-09-12 18:13:58,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:58,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 18:13:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:58,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 18:13:58,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-12 18:13:58,004 INFO L87 Difference]: Start difference. First operand 427 states and 577 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2024-09-12 18:13:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:58,606 INFO L93 Difference]: Finished difference Result 849 states and 1195 transitions. [2024-09-12 18:13:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 18:13:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 32 [2024-09-12 18:13:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:58,610 INFO L225 Difference]: With dead ends: 849 [2024-09-12 18:13:58,610 INFO L226 Difference]: Without dead ends: 667 [2024-09-12 18:13:58,611 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-09-12 18:13:58,611 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:58,611 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 389 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 18:13:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2024-09-12 18:13:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 425. [2024-09-12 18:13:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.3714285714285714) internal successors, (576), 420 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) [2024-09-12 18:13:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 580 transitions. [2024-09-12 18:13:58,766 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 580 transitions. Word has length 32 [2024-09-12 18:13:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:58,766 INFO L474 AbstractCegarLoop]: Abstraction has 425 states and 580 transitions. [2024-09-12 18:13:58,766 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2024-09-12 18:13:58,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 580 transitions. [2024-09-12 18:13:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 18:13:58,768 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:58,768 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:58,782 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 18:13:58,968 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:58,968 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:13:58,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash -906855808, now seen corresponding path program 5 times [2024-09-12 18:13:58,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:13:58,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724295500] [2024-09-12 18:13:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:13:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:13:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:59,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:13:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:13:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 18:13:59,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:13:59,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724295500] [2024-09-12 18:13:59,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724295500] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:13:59,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115371736] [2024-09-12 18:13:59,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 18:13:59,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:13:59,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:13:59,198 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) [2024-09-12 18:13:59,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 18:13:59,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 18:13:59,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:13:59,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 18:13:59,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:13:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 18:13:59,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:13:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 18:13:59,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115371736] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:13:59,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:13:59,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-09-12 18:13:59,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051369338] [2024-09-12 18:13:59,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:13:59,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 18:13:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:13:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 18:13:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-12 18:13:59,417 INFO L87 Difference]: Start difference. First operand 425 states and 580 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 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) [2024-09-12 18:13:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:13:59,775 INFO L93 Difference]: Finished difference Result 519 states and 698 transitions. [2024-09-12 18:13:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 18:13:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 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 34 [2024-09-12 18:13:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:13:59,778 INFO L225 Difference]: With dead ends: 519 [2024-09-12 18:13:59,778 INFO L226 Difference]: Without dead ends: 493 [2024-09-12 18:13:59,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 14 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-12 18:13:59,780 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:13:59,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:13:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-09-12 18:13:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 429. [2024-09-12 18:13:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 424 states have (on average 1.3797169811320755) internal successors, (585), 424 states have internal predecessors, (585), 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) [2024-09-12 18:13:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 589 transitions. [2024-09-12 18:13:59,952 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 589 transitions. Word has length 34 [2024-09-12 18:13:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:13:59,953 INFO L474 AbstractCegarLoop]: Abstraction has 429 states and 589 transitions. [2024-09-12 18:13:59,953 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 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) [2024-09-12 18:13:59,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:13:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 589 transitions. [2024-09-12 18:13:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 18:13:59,954 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:13:59,954 INFO L216 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:13:59,970 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 18:14:00,158 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:00,159 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:00,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash 452281887, now seen corresponding path program 3 times [2024-09-12 18:14:00,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:00,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978011006] [2024-09-12 18:14:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:00,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:00,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 18:14:00,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:00,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978011006] [2024-09-12 18:14:00,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978011006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:00,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492485054] [2024-09-12 18:14:00,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 18:14:00,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:00,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:00,386 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) [2024-09-12 18:14:00,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 18:14:00,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 18:14:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:00,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 18:14:00,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 18:14:00,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 18:14:00,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492485054] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:00,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:00,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 28 [2024-09-12 18:14:00,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811743891] [2024-09-12 18:14:00,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:00,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 18:14:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:00,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 18:14:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-09-12 18:14:00,840 INFO L87 Difference]: Start difference. First operand 429 states and 589 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2024-09-12 18:14:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:03,257 INFO L93 Difference]: Finished difference Result 916 states and 1289 transitions. [2024-09-12 18:14:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-12 18:14:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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 34 [2024-09-12 18:14:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:03,261 INFO L225 Difference]: With dead ends: 916 [2024-09-12 18:14:03,261 INFO L226 Difference]: Without dead ends: 581 [2024-09-12 18:14:03,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=940, Invalid=5702, Unknown=0, NotChecked=0, Total=6642 [2024-09-12 18:14:03,264 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 213 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:03,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 608 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 18:14:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-09-12 18:14:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 445. [2024-09-12 18:14:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.3590909090909091) internal successors, (598), 440 states have internal predecessors, (598), 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) [2024-09-12 18:14:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 602 transitions. [2024-09-12 18:14:03,435 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 602 transitions. Word has length 34 [2024-09-12 18:14:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:03,435 INFO L474 AbstractCegarLoop]: Abstraction has 445 states and 602 transitions. [2024-09-12 18:14:03,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 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) [2024-09-12 18:14:03,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 602 transitions. [2024-09-12 18:14:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 18:14:03,437 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:03,437 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:03,452 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-12 18:14:03,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:03,642 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:03,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2108590391, now seen corresponding path program 4 times [2024-09-12 18:14:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556246933] [2024-09-12 18:14:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:03,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:03,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 18:14:03,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:03,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556246933] [2024-09-12 18:14:03,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556246933] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:03,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443381460] [2024-09-12 18:14:03,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 18:14:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:03,932 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) [2024-09-12 18:14:03,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 18:14:03,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 18:14:03,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:03,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 18:14:03,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 18:14:04,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 18:14:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443381460] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:04,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:04,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 6] total 20 [2024-09-12 18:14:04,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155270483] [2024-09-12 18:14:04,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:04,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 18:14:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 18:14:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-12 18:14:04,145 INFO L87 Difference]: Start difference. First operand 445 states and 602 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 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) [2024-09-12 18:14:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:04,955 INFO L93 Difference]: Finished difference Result 918 states and 1325 transitions. [2024-09-12 18:14:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 18:14:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 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 37 [2024-09-12 18:14:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:04,959 INFO L225 Difference]: With dead ends: 918 [2024-09-12 18:14:04,959 INFO L226 Difference]: Without dead ends: 780 [2024-09-12 18:14:04,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 18:14:04,960 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 154 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:04,960 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 535 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 18:14:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2024-09-12 18:14:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 534. [2024-09-12 18:14:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 529 states have (on average 1.3761814744801513) internal successors, (728), 529 states have internal predecessors, (728), 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) [2024-09-12 18:14:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 732 transitions. [2024-09-12 18:14:05,152 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 732 transitions. Word has length 37 [2024-09-12 18:14:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:05,153 INFO L474 AbstractCegarLoop]: Abstraction has 534 states and 732 transitions. [2024-09-12 18:14:05,153 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 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) [2024-09-12 18:14:05,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 732 transitions. [2024-09-12 18:14:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 18:14:05,154 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:05,154 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:05,166 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 18:14:05,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-12 18:14:05,355 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:05,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1423913430, now seen corresponding path program 6 times [2024-09-12 18:14:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024012853] [2024-09-12 18:14:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:05,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 18:14:05,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:05,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024012853] [2024-09-12 18:14:05,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024012853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:05,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002665044] [2024-09-12 18:14:05,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 18:14:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:05,592 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) [2024-09-12 18:14:05,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 18:14:05,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 18:14:05,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:05,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 18:14:05,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 18:14:05,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 18:14:06,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002665044] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:06,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:06,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 11] total 30 [2024-09-12 18:14:06,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639101286] [2024-09-12 18:14:06,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:06,124 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 18:14:06,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:06,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 18:14:06,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2024-09-12 18:14:06,125 INFO L87 Difference]: Start difference. First operand 534 states and 732 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2024-09-12 18:14:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:08,667 INFO L93 Difference]: Finished difference Result 1030 states and 1483 transitions. [2024-09-12 18:14:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-12 18:14:08,667 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 37 [2024-09-12 18:14:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:08,670 INFO L225 Difference]: With dead ends: 1030 [2024-09-12 18:14:08,671 INFO L226 Difference]: Without dead ends: 709 [2024-09-12 18:14:08,673 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=802, Invalid=7570, Unknown=0, NotChecked=0, Total=8372 [2024-09-12 18:14:08,673 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:08,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 820 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 18:14:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2024-09-12 18:14:08,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 529. [2024-09-12 18:14:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.3587786259541985) internal successors, (712), 524 states have internal predecessors, (712), 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) [2024-09-12 18:14:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 716 transitions. [2024-09-12 18:14:08,915 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 716 transitions. Word has length 37 [2024-09-12 18:14:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:08,915 INFO L474 AbstractCegarLoop]: Abstraction has 529 states and 716 transitions. [2024-09-12 18:14:08,916 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2024-09-12 18:14:08,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 716 transitions. [2024-09-12 18:14:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 18:14:08,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:08,921 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:08,936 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-12 18:14:09,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 18:14:09,121 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:09,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash 52817055, now seen corresponding path program 7 times [2024-09-12 18:14:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:09,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986756277] [2024-09-12 18:14:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:09,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:09,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 18:14:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986756277] [2024-09-12 18:14:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986756277] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042875588] [2024-09-12 18:14:09,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 18:14:09,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:09,295 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) [2024-09-12 18:14:09,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 18:14:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:09,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 18:14:09,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 18:14:09,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 18:14:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042875588] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:09,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:09,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-12 18:14:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794961557] [2024-09-12 18:14:09,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:09,480 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 18:14:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 18:14:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 18:14:09,481 INFO L87 Difference]: Start difference. First operand 529 states and 716 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2024-09-12 18:14:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:10,166 INFO L93 Difference]: Finished difference Result 823 states and 1090 transitions. [2024-09-12 18:14:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 18:14:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 38 [2024-09-12 18:14:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:10,169 INFO L225 Difference]: With dead ends: 823 [2024-09-12 18:14:10,170 INFO L226 Difference]: Without dead ends: 785 [2024-09-12 18:14:10,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-09-12 18:14:10,170 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:10,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 175 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:14:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2024-09-12 18:14:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 555. [2024-09-12 18:14:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.3545454545454545) internal successors, (745), 550 states have internal predecessors, (745), 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) [2024-09-12 18:14:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 749 transitions. [2024-09-12 18:14:10,424 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 749 transitions. Word has length 38 [2024-09-12 18:14:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:10,424 INFO L474 AbstractCegarLoop]: Abstraction has 555 states and 749 transitions. [2024-09-12 18:14:10,424 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2024-09-12 18:14:10,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 749 transitions. [2024-09-12 18:14:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 18:14:10,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:10,427 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:10,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 18:14:10,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 18:14:10,628 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:10,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1717896673, now seen corresponding path program 3 times [2024-09-12 18:14:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:10,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669861300] [2024-09-12 18:14:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:10,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:10,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 18:14:10,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:10,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669861300] [2024-09-12 18:14:10,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669861300] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:10,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952598222] [2024-09-12 18:14:10,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 18:14:10,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:10,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:10,859 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) [2024-09-12 18:14:10,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 18:14:10,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 18:14:10,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:10,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 18:14:10,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 18:14:11,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 18:14:11,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952598222] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:11,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:11,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-12 18:14:11,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229358865] [2024-09-12 18:14:11,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:11,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 18:14:11,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:11,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 18:14:11,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2024-09-12 18:14:11,337 INFO L87 Difference]: Start difference. First operand 555 states and 749 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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) [2024-09-12 18:14:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:13,847 INFO L93 Difference]: Finished difference Result 1179 states and 1672 transitions. [2024-09-12 18:14:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-12 18:14:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 38 [2024-09-12 18:14:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:13,851 INFO L225 Difference]: With dead ends: 1179 [2024-09-12 18:14:13,851 INFO L226 Difference]: Without dead ends: 1065 [2024-09-12 18:14:13,853 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1538, Invalid=5944, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 18:14:13,853 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 290 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:13,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 387 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 18:14:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2024-09-12 18:14:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 659. [2024-09-12 18:14:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 654 states have (on average 1.3516819571865444) internal successors, (884), 654 states have internal predecessors, (884), 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) [2024-09-12 18:14:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 888 transitions. [2024-09-12 18:14:14,219 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 888 transitions. Word has length 38 [2024-09-12 18:14:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:14,219 INFO L474 AbstractCegarLoop]: Abstraction has 659 states and 888 transitions. [2024-09-12 18:14:14,220 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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) [2024-09-12 18:14:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 888 transitions. [2024-09-12 18:14:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 18:14:14,221 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:14,222 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:14,235 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-12 18:14:14,422 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 18:14:14,422 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:14,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash 171159391, now seen corresponding path program 8 times [2024-09-12 18:14:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:14,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990939910] [2024-09-12 18:14:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:14,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:14,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 18:14:14,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:14,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990939910] [2024-09-12 18:14:14,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990939910] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:14,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786415527] [2024-09-12 18:14:14,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 18:14:14,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:14,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:14,719 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) [2024-09-12 18:14:14,721 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 18:14:14,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 18:14:14,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:14,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 18:14:14,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 18:14:14,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 18:14:14,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786415527] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:14,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:14,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-09-12 18:14:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807454503] [2024-09-12 18:14:14,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:14,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 18:14:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 18:14:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-12 18:14:14,988 INFO L87 Difference]: Start difference. First operand 659 states and 888 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 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) [2024-09-12 18:14:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:15,738 INFO L93 Difference]: Finished difference Result 952 states and 1240 transitions. [2024-09-12 18:14:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 18:14:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 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 40 [2024-09-12 18:14:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:15,743 INFO L225 Difference]: With dead ends: 952 [2024-09-12 18:14:15,743 INFO L226 Difference]: Without dead ends: 828 [2024-09-12 18:14:15,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 26 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-12 18:14:15,744 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:15,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 206 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:14:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2024-09-12 18:14:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 659. [2024-09-12 18:14:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 654 states have (on average 1.342507645259939) internal successors, (878), 654 states have internal predecessors, (878), 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) [2024-09-12 18:14:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 882 transitions. [2024-09-12 18:14:16,111 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 882 transitions. Word has length 40 [2024-09-12 18:14:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:16,112 INFO L474 AbstractCegarLoop]: Abstraction has 659 states and 882 transitions. [2024-09-12 18:14:16,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 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) [2024-09-12 18:14:16,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 882 transitions. [2024-09-12 18:14:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 18:14:16,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:16,114 INFO L216 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:16,131 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-12 18:14:16,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-12 18:14:16,315 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:16,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:16,315 INFO L85 PathProgramCache]: Analyzing trace with hash 520169312, now seen corresponding path program 9 times [2024-09-12 18:14:16,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:16,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116551418] [2024-09-12 18:14:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:16,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:16,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 18:14:16,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:16,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116551418] [2024-09-12 18:14:16,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116551418] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:16,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272349439] [2024-09-12 18:14:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 18:14:16,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:16,584 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) [2024-09-12 18:14:16,586 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 18:14:16,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 18:14:16,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:16,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 18:14:16,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-12 18:14:16,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-12 18:14:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272349439] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:16,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:16,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 22 [2024-09-12 18:14:16,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688406534] [2024-09-12 18:14:16,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:16,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 18:14:16,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 18:14:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-09-12 18:14:16,831 INFO L87 Difference]: Start difference. First operand 659 states and 882 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2024-09-12 18:14:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:18,232 INFO L93 Difference]: Finished difference Result 1366 states and 1918 transitions. [2024-09-12 18:14:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 18:14:18,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 40 [2024-09-12 18:14:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:18,237 INFO L225 Difference]: With dead ends: 1366 [2024-09-12 18:14:18,237 INFO L226 Difference]: Without dead ends: 1071 [2024-09-12 18:14:18,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 18:14:18,238 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 288 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:18,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 764 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 18:14:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2024-09-12 18:14:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 683. [2024-09-12 18:14:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.345132743362832) internal successors, (912), 678 states have internal predecessors, (912), 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) [2024-09-12 18:14:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 916 transitions. [2024-09-12 18:14:18,775 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 916 transitions. Word has length 40 [2024-09-12 18:14:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:18,775 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 916 transitions. [2024-09-12 18:14:18,776 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2024-09-12 18:14:18,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 916 transitions. [2024-09-12 18:14:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 18:14:18,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:18,778 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:18,794 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 18:14:18,978 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-12 18:14:18,978 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:18,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -245472181, now seen corresponding path program 4 times [2024-09-12 18:14:18,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:18,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625678017] [2024-09-12 18:14:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:19,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-12 18:14:19,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625678017] [2024-09-12 18:14:19,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625678017] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406371543] [2024-09-12 18:14:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 18:14:19,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:19,237 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) [2024-09-12 18:14:19,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 18:14:19,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 18:14:19,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:19,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 18:14:19,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-12 18:14:19,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-12 18:14:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406371543] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:19,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2024-09-12 18:14:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776381606] [2024-09-12 18:14:19,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:19,897 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 18:14:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 18:14:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 18:14:19,898 INFO L87 Difference]: Start difference. First operand 683 states and 916 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 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) [2024-09-12 18:14:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:14:57,941 INFO L93 Difference]: Finished difference Result 1819 states and 2541 transitions. [2024-09-12 18:14:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 528 states. [2024-09-12 18:14:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 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 41 [2024-09-12 18:14:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:14:57,947 INFO L225 Difference]: With dead ends: 1819 [2024-09-12 18:14:57,947 INFO L226 Difference]: Without dead ends: 1490 [2024-09-12 18:14:57,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 527 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132299 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=34017, Invalid=245295, Unknown=0, NotChecked=0, Total=279312 [2024-09-12 18:14:57,968 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 1728 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:14:57,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 628 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1568 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-12 18:14:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2024-09-12 18:14:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 778. [2024-09-12 18:14:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 773 states have (on average 1.3570504527813714) internal successors, (1049), 773 states have internal predecessors, (1049), 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) [2024-09-12 18:14:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1053 transitions. [2024-09-12 18:14:58,727 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1053 transitions. Word has length 41 [2024-09-12 18:14:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:14:58,728 INFO L474 AbstractCegarLoop]: Abstraction has 778 states and 1053 transitions. [2024-09-12 18:14:58,728 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 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) [2024-09-12 18:14:58,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1053 transitions. [2024-09-12 18:14:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 18:14:58,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:14:58,730 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:14:58,746 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-12 18:14:58,933 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 18:14:58,934 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:14:58,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:14:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1706754144, now seen corresponding path program 10 times [2024-09-12 18:14:58,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:14:58,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234264917] [2024-09-12 18:14:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:14:58,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:14:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:59,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:14:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:14:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 18:14:59,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:14:59,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234264917] [2024-09-12 18:14:59,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234264917] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:14:59,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643286592] [2024-09-12 18:14:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 18:14:59,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:14:59,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:14:59,227 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) [2024-09-12 18:14:59,228 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 18:14:59,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 18:14:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:14:59,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 18:14:59,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:14:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 18:14:59,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:14:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 18:14:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643286592] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:14:59,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:14:59,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2024-09-12 18:14:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821558448] [2024-09-12 18:14:59,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:14:59,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 18:14:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:14:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 18:14:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2024-09-12 18:14:59,551 INFO L87 Difference]: Start difference. First operand 778 states and 1053 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 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) [2024-09-12 18:15:07,711 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 43 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:15:15,783 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 38 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:15:23,859 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:15:32,035 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 [] [2024-09-12 18:15:40,145 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:15:48,310 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:15:56,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:04,846 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:16:17,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:21,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:25,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:30,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:34,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:38,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:42,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:16:46,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:17:02,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:17:06,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:17:42,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:17:47,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []