./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/watermelon.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 --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/watermelon.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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:38:49,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:38:49,503 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:38:49,513 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:38:49,514 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:38:49,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:38:49,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:38:49,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:38:49,551 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:38:49,551 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:38:49,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:38:49,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:38:49,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:38:49,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:38:49,555 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:38:49,556 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:38:49,556 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:38:49,556 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:38:49,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:38:49,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:38:49,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:38:49,560 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:38:49,561 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:38:49,561 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:38:49,561 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:38:49,561 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:38:49,562 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:38:49,562 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:38:49,562 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:38:49,562 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:38:49,563 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:38:49,563 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:38:49,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:38:49,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:38:49,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:38:49,573 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:38:49,573 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:38:49,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:38:49,573 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:38:49,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:38:49,574 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:38:49,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:38:49,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:38:49,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:38:49,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:38:49,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:38:49,921 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:38:49,922 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:38:49,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-12 15:38:51,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:38:51,624 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:38:51,625 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-12 15:38:51,633 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bcb08219b/46997030eea3495081557fa10760ac00/FLAG4ea666ee3 [2024-09-12 15:38:51,647 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bcb08219b/46997030eea3495081557fa10760ac00 [2024-09-12 15:38:51,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:38:51,652 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:38:51,654 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:38:51,654 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:38:51,659 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:38:51,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97898c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51, skipping insertion in model container [2024-09-12 15:38:51,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,681 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:38:51,850 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/watermelon.c[373,386] [2024-09-12 15:38:51,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:38:51,886 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:38:51,897 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/watermelon.c[373,386] [2024-09-12 15:38:51,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:38:51,923 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:38:51,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51 WrapperNode [2024-09-12 15:38:51,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:38:51,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:38:51,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:38:51,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:38:51,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,941 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,949 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:38:51,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:38:51,951 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:38:51,951 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:38:51,951 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:38:51,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,966 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,983 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 15:38:51,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,992 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,996 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:51,998 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:38:51,999 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:38:51,999 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:38:51,999 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:38:52,000 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (1/1) ... [2024-09-12 15:38:52,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:38:52,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:52,033 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 15:38:52,036 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 15:38:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:38:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-09-12 15:38:52,084 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-09-12 15:38:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:38:52,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:38:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:38:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-09-12 15:38:52,086 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-09-12 15:38:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:38:52,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:38:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:38:52,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:38:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:38:52,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:38:52,157 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:38:52,159 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:38:52,401 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-12 15:38:52,402 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:38:52,438 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:38:52,439 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 15:38:52,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:38:52 BoogieIcfgContainer [2024-09-12 15:38:52,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:38:52,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:38:52,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:38:52,446 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:38:52,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:38:51" (1/3) ... [2024-09-12 15:38:52,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c9ad13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:38:52, skipping insertion in model container [2024-09-12 15:38:52,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:38:51" (2/3) ... [2024-09-12 15:38:52,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c9ad13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:38:52, skipping insertion in model container [2024-09-12 15:38:52,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:38:52" (3/3) ... [2024-09-12 15:38:52,449 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2024-09-12 15:38:52,466 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:38:52,466 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:38:52,527 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:38:52,534 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;@4e5071b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:38:52,535 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:38:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:38:52,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 15:38:52,546 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:52,547 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 15:38:52,548 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:52,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1545535369, now seen corresponding path program 1 times [2024-09-12 15:38:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249310339] [2024-09-12 15:38:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-12 15:38:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,210 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 15:38:53,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:53,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249310339] [2024-09-12 15:38:53,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249310339] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:38:53,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:38:53,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-12 15:38:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624263725] [2024-09-12 15:38:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:38:53,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 15:38:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 15:38:53,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:38:53,252 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:53,813 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2024-09-12 15:38:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:38:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-12 15:38:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:53,824 INFO L225 Difference]: With dead ends: 80 [2024-09-12 15:38:53,825 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 15:38:53,830 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:38:53,835 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:53,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:38:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 15:38:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-09-12 15:38:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-12 15:38:53,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2024-09-12 15:38:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:53,888 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-12 15:38:53,888 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:53,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-12 15:38:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 15:38:53,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:53,891 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, 1, 1, 1] [2024-09-12 15:38:53,891 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:38:53,891 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:53,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:53,892 INFO L85 PathProgramCache]: Analyzing trace with hash 964775093, now seen corresponding path program 1 times [2024-09-12 15:38:53,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:53,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328879260] [2024-09-12 15:38:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:53,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-12 15:38:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,033 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 15:38:54,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:54,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328879260] [2024-09-12 15:38:54,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328879260] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:38:54,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:38:54,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:38:54,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005435113] [2024-09-12 15:38:54,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:38:54,035 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:38:54,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:54,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:38:54,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:38:54,037 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:54,120 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-09-12 15:38:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:38:54,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-12 15:38:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:54,122 INFO L225 Difference]: With dead ends: 51 [2024-09-12 15:38:54,123 INFO L226 Difference]: Without dead ends: 38 [2024-09-12 15:38:54,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 15:38:54,125 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:54,126 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-12 15:38:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-12 15:38:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-12 15:38:54,146 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 25 [2024-09-12 15:38:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:54,146 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-12 15:38:54,147 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:54,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-12 15:38:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 15:38:54,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:54,149 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, 1, 1, 1] [2024-09-12 15:38:54,150 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:38:54,150 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:54,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:54,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1908872900, now seen corresponding path program 1 times [2024-09-12 15:38:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:54,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064365301] [2024-09-12 15:38:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:38:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,246 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 15:38:54,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:54,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064365301] [2024-09-12 15:38:54,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064365301] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:38:54,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:38:54,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:38:54,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721186877] [2024-09-12 15:38:54,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:38:54,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:38:54,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:38:54,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:38:54,252 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:54,340 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-12 15:38:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:38:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-12 15:38:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:54,341 INFO L225 Difference]: With dead ends: 67 [2024-09-12 15:38:54,341 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 15:38:54,342 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 15:38:54,343 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:54,344 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 15:38:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-12 15:38:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-09-12 15:38:54,357 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2024-09-12 15:38:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:54,357 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-09-12 15:38:54,357 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:54,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-09-12 15:38:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 15:38:54,359 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:54,359 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, 1, 1, 1, 1] [2024-09-12 15:38:54,360 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 15:38:54,360 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:54,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:54,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1551444720, now seen corresponding path program 1 times [2024-09-12 15:38:54,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:54,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686294207] [2024-09-12 15:38:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:54,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-12 15:38:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:38:54,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:54,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686294207] [2024-09-12 15:38:54,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686294207] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:54,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358692147] [2024-09-12 15:38:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:54,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:54,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:54,445 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 15:38:54,449 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 15:38:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 15:38:54,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:38:54,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:38:54,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358692147] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:38:54,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:38:54,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2024-09-12 15:38:54,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618992598] [2024-09-12 15:38:54,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:38:54,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 15:38:54,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:54,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 15:38:54,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:38:54,730 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:54,833 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-09-12 15:38:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:38:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-12 15:38:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:54,835 INFO L225 Difference]: With dead ends: 51 [2024-09-12 15:38:54,835 INFO L226 Difference]: Without dead ends: 41 [2024-09-12 15:38:54,836 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:38:54,836 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:54,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-12 15:38:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-12 15:38:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-09-12 15:38:54,854 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2024-09-12 15:38:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:54,857 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-09-12 15:38:54,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:54,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-09-12 15:38:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 15:38:54,859 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:54,859 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, 1, 1, 1, 1] [2024-09-12 15:38:54,878 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 15:38:55,059 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:55,060 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:55,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1138172918, now seen corresponding path program 1 times [2024-09-12 15:38:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87142408] [2024-09-12 15:38:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:38:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:38:55,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87142408] [2024-09-12 15:38:55,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87142408] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116744814] [2024-09-12 15:38:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:55,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:55,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:55,153 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 15:38:55,155 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 15:38:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 15:38:55,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:38:55,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:38:55,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116744814] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:55,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:55,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-09-12 15:38:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985041916] [2024-09-12 15:38:55,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:55,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:38:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:38:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:38:55,299 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:55,477 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-09-12 15:38:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:38:55,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-12 15:38:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:55,479 INFO L225 Difference]: With dead ends: 68 [2024-09-12 15:38:55,480 INFO L226 Difference]: Without dead ends: 40 [2024-09-12 15:38:55,480 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:38:55,481 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:55,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-12 15:38:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-12 15:38:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-09-12 15:38:55,501 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2024-09-12 15:38:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:55,501 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-09-12 15:38:55,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:55,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-09-12 15:38:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 15:38:55,503 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:55,504 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 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 15:38:55,521 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:55,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:55,708 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:55,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1107312764, now seen corresponding path program 2 times [2024-09-12 15:38:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190561160] [2024-09-12 15:38:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:38:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 15:38:55,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:55,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190561160] [2024-09-12 15:38:55,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190561160] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:38:55,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:38:55,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-12 15:38:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748780977] [2024-09-12 15:38:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:38:55,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:38:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:38:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:38:55,924 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:56,116 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-09-12 15:38:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:38:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-12 15:38:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:56,118 INFO L225 Difference]: With dead ends: 48 [2024-09-12 15:38:56,118 INFO L226 Difference]: Without dead ends: 40 [2024-09-12 15:38:56,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:38:56,119 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:56,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-12 15:38:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-12 15:38:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-12 15:38:56,139 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2024-09-12 15:38:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:56,139 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-12 15:38:56,139 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:56,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-12 15:38:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 15:38:56,141 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:56,141 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 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 15:38:56,141 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-12 15:38:56,141 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:56,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash 545445883, now seen corresponding path program 1 times [2024-09-12 15:38:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:56,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177089988] [2024-09-12 15:38:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:38:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:38:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:56,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177089988] [2024-09-12 15:38:56,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177089988] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:56,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578998101] [2024-09-12 15:38:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:56,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:56,275 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 15:38:56,276 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 15:38:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 15:38:56,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:56,366 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 15:38:56,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:56,415 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 15:38:56,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578998101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:56,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:56,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2024-09-12 15:38:56,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237843938] [2024-09-12 15:38:56,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:56,418 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:38:56,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:38:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:38:56,419 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 15:38:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:56,603 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-09-12 15:38:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:38:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-12 15:38:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:56,604 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:38:56,604 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 15:38:56,605 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:38:56,606 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:56,606 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 15:38:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-12 15:38:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-09-12 15:38:56,618 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 31 [2024-09-12 15:38:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:56,618 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-09-12 15:38:56,619 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 15:38:56,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-09-12 15:38:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:38:56,620 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:56,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:56,638 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 15:38:56,821 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 15:38:56,822 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:56,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash -60565722, now seen corresponding path program 1 times [2024-09-12 15:38:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:56,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000095177] [2024-09-12 15:38:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:38:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 15:38:56,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:56,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000095177] [2024-09-12 15:38:56,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000095177] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:56,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884050652] [2024-09-12 15:38:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:56,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:56,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:56,930 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 15:38:56,931 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 15:38:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:56,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 15:38:56,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 15:38:57,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 15:38:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884050652] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:57,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:57,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-12 15:38:57,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154852498] [2024-09-12 15:38:57,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:57,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:38:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:38:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:38:57,092 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:57,262 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2024-09-12 15:38:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 15:38:57,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2024-09-12 15:38:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:57,263 INFO L225 Difference]: With dead ends: 54 [2024-09-12 15:38:57,263 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 15:38:57,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:38:57,264 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:57,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 15:38:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 15:38:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:38:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-09-12 15:38:57,284 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 32 [2024-09-12 15:38:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:57,284 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-09-12 15:38:57,284 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:57,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-09-12 15:38:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:38:57,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:57,289 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:57,305 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 15:38:57,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:57,490 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 619492648, now seen corresponding path program 1 times [2024-09-12 15:38:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745675261] [2024-09-12 15:38:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:38:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:57,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:57,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745675261] [2024-09-12 15:38:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745675261] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:38:57,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:38:57,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-12 15:38:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27477199] [2024-09-12 15:38:57,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:38:57,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 15:38:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 15:38:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:38:57,702 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:58,019 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2024-09-12 15:38:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:38:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-12 15:38:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:58,021 INFO L225 Difference]: With dead ends: 53 [2024-09-12 15:38:58,021 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 15:38:58,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:38:58,023 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:58,023 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 15:38:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-09-12 15:38:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:38:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-09-12 15:38:58,038 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 32 [2024-09-12 15:38:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:58,038 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-09-12 15:38:58,038 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:58,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-09-12 15:38:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 15:38:58,041 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:58,041 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 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 15:38:58,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-12 15:38:58,042 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:58,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2067916900, now seen corresponding path program 2 times [2024-09-12 15:38:58,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:58,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21872947] [2024-09-12 15:38:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:58,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:58,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:58,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:58,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:38:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:38:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:58,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21872947] [2024-09-12 15:38:58,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21872947] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:58,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954979508] [2024-09-12 15:38:58,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:38:58,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:58,346 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 15:38:58,348 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 15:38:58,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:38:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:58,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:38:58,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:38:58,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:38:59,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954979508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:59,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:59,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-12 15:38:59,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272447911] [2024-09-12 15:38:59,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:59,159 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:38:59,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:38:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:38:59,161 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:59,627 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-09-12 15:38:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:38:59,627 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-12 15:38:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:59,628 INFO L225 Difference]: With dead ends: 61 [2024-09-12 15:38:59,630 INFO L226 Difference]: Without dead ends: 51 [2024-09-12 15:38:59,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:38:59,632 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:59,632 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-12 15:38:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2024-09-12 15:38:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:38:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2024-09-12 15:38:59,649 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2024-09-12 15:38:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:59,650 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2024-09-12 15:38:59,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:59,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2024-09-12 15:38:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 15:38:59,652 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:59,653 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 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 15:38:59,669 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 15:38:59,853 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 15:38:59,854 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:59,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1242434853, now seen corresponding path program 2 times [2024-09-12 15:38:59,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:59,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106551199] [2024-09-12 15:38:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:59,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:59,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:59,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:00,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:39:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:00,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106551199] [2024-09-12 15:39:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106551199] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64134912] [2024-09-12 15:39:00,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:00,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:00,168 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 15:39:00,170 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 15:39:00,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:00,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:39:00,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:00,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64134912] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:00,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-12 15:39:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948276524] [2024-09-12 15:39:00,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:00,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:39:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:39:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:39:00,874 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:01,302 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2024-09-12 15:39:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:39:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-12 15:39:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:01,303 INFO L225 Difference]: With dead ends: 55 [2024-09-12 15:39:01,303 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 15:39:01,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:39:01,305 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:01,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 15:39:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-12 15:39:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-09-12 15:39:01,316 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 33 [2024-09-12 15:39:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:01,316 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-09-12 15:39:01,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:01,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-09-12 15:39:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 15:39:01,318 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:01,318 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 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 15:39:01,342 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 15:39:01,518 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 15:39:01,519 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:01,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1389102369, now seen corresponding path program 3 times [2024-09-12 15:39:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:01,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570115216] [2024-09-12 15:39:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:01,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:01,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:01,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:01,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:39:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:01,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:01,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570115216] [2024-09-12 15:39:01,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570115216] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:01,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714530679] [2024-09-12 15:39:01,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:01,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:01,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:01,831 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 15:39:01,832 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 15:39:01,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:39:01,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:01,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-12 15:39:01,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:02,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:02,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714530679] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:02,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:02,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-12 15:39:02,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047576042] [2024-09-12 15:39:02,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:02,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 15:39:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 15:39:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:39:02,696 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:03,200 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-09-12 15:39:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:39:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-12 15:39:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:03,201 INFO L225 Difference]: With dead ends: 61 [2024-09-12 15:39:03,202 INFO L226 Difference]: Without dead ends: 50 [2024-09-12 15:39:03,203 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:39:03,204 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:03,204 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-12 15:39:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2024-09-12 15:39:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-09-12 15:39:03,216 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 34 [2024-09-12 15:39:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:03,217 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-09-12 15:39:03,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:03,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-09-12 15:39:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 15:39:03,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:03,218 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 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 15:39:03,236 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:03,418 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 15:39:03,419 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:03,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1131745825, now seen corresponding path program 3 times [2024-09-12 15:39:03,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:03,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444431261] [2024-09-12 15:39:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:03,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:03,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:03,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:03,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:39:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:03,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:03,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444431261] [2024-09-12 15:39:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444431261] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:03,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534264750] [2024-09-12 15:39:03,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:03,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:03,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:03,721 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 15:39:03,734 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 15:39:03,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:39:03,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:03,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-12 15:39:03,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:04,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:04,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534264750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:04,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:04,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-12 15:39:04,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693426437] [2024-09-12 15:39:04,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:04,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 15:39:04,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:04,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 15:39:04,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:39:04,568 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:05,049 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-09-12 15:39:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:39:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-12 15:39:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:05,051 INFO L225 Difference]: With dead ends: 56 [2024-09-12 15:39:05,051 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 15:39:05,052 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:39:05,053 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:05,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 15:39:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-12 15:39:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-09-12 15:39:05,068 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2024-09-12 15:39:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:05,068 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-09-12 15:39:05,068 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:05,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-09-12 15:39:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:39:05,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:05,069 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 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 15:39:05,086 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 15:39:05,270 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 15:39:05,270 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:05,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1974259355, now seen corresponding path program 4 times [2024-09-12 15:39:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:05,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823794808] [2024-09-12 15:39:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:05,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:05,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:05,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:05,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:39:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823794808] [2024-09-12 15:39:05,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823794808] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:05,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49586859] [2024-09-12 15:39:05,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:05,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:05,571 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 15:39:05,572 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 15:39:05,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:05,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:05,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:39:05,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:05,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:06,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49586859] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:06,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:06,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-12 15:39:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693953171] [2024-09-12 15:39:06,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:06,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:39:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:39:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:39:06,282 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:06,769 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-09-12 15:39:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:39:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-12 15:39:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:06,770 INFO L225 Difference]: With dead ends: 63 [2024-09-12 15:39:06,770 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 15:39:06,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:39:06,772 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:06,773 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 15:39:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2024-09-12 15:39:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-09-12 15:39:06,783 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2024-09-12 15:39:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:06,783 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-09-12 15:39:06,783 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:06,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-09-12 15:39:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:39:06,784 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:06,784 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 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 15:39:06,801 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 15:39:06,988 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 15:39:06,989 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:06,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1359484736, now seen corresponding path program 4 times [2024-09-12 15:39:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:06,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211885295] [2024-09-12 15:39:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:06,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:07,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:07,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:07,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:39:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:07,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211885295] [2024-09-12 15:39:07,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211885295] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067852746] [2024-09-12 15:39:07,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:07,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:07,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:07,255 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 15:39:07,257 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 15:39:07,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:07,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:07,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:39:07,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:07,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:07,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067852746] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:07,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:07,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-12 15:39:07,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268020365] [2024-09-12 15:39:07,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:07,957 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:39:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:39:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:39:07,959 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:08,366 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2024-09-12 15:39:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:39:08,367 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-12 15:39:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:08,367 INFO L225 Difference]: With dead ends: 57 [2024-09-12 15:39:08,367 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 15:39:08,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:39:08,369 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:08,369 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 15:39:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 15:39:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-12 15:39:08,384 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 35 [2024-09-12 15:39:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:08,384 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-12 15:39:08,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:08,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-12 15:39:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 15:39:08,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:08,385 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 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 15:39:08,398 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:08,589 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 15:39:08,590 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:08,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1514281526, now seen corresponding path program 5 times [2024-09-12 15:39:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063766675] [2024-09-12 15:39:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:08,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:39:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:08,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063766675] [2024-09-12 15:39:08,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063766675] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:08,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942681601] [2024-09-12 15:39:08,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:08,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:08,909 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 15:39:08,910 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 15:39:08,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 15:39:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:08,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 15:39:08,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:09,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942681601] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:09,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:09,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-12 15:39:09,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512459383] [2024-09-12 15:39:09,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:09,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 15:39:09,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:09,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 15:39:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:39:09,811 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:10,346 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-09-12 15:39:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:39:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-12 15:39:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:10,348 INFO L225 Difference]: With dead ends: 63 [2024-09-12 15:39:10,348 INFO L226 Difference]: Without dead ends: 52 [2024-09-12 15:39:10,349 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:39:10,350 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:10,350 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-12 15:39:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-09-12 15:39:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2024-09-12 15:39:10,367 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 36 [2024-09-12 15:39:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:10,367 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2024-09-12 15:39:10,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:10,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2024-09-12 15:39:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 15:39:10,369 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:10,369 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 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 15:39:10,386 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 15:39:10,570 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 15:39:10,570 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:10,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:10,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1975485178, now seen corresponding path program 5 times [2024-09-12 15:39:10,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:10,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491165105] [2024-09-12 15:39:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:10,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:10,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:10,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:10,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:39:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:10,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491165105] [2024-09-12 15:39:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491165105] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406439415] [2024-09-12 15:39:10,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:10,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:10,885 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 15:39:10,886 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 15:39:10,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 15:39:10,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:10,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 15:39:10,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:11,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:11,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406439415] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:11,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-12 15:39:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110665982] [2024-09-12 15:39:11,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:11,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 15:39:11,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 15:39:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:39:11,686 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:12,169 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-09-12 15:39:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:39:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-12 15:39:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:12,170 INFO L225 Difference]: With dead ends: 58 [2024-09-12 15:39:12,170 INFO L226 Difference]: Without dead ends: 49 [2024-09-12 15:39:12,171 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:39:12,172 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:12,172 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-12 15:39:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-12 15:39:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-09-12 15:39:12,186 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2024-09-12 15:39:12,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:12,187 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-09-12 15:39:12,187 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:12,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-09-12 15:39:12,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 15:39:12,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:12,188 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 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 15:39:12,201 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 15:39:12,390 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 15:39:12,391 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:12,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1819133756, now seen corresponding path program 6 times [2024-09-12 15:39:12,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:12,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021384540] [2024-09-12 15:39:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:39:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:12,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021384540] [2024-09-12 15:39:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021384540] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429890599] [2024-09-12 15:39:12,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:12,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:12,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:12,702 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 15:39:12,703 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 15:39:12,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:39:12,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:12,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:39:12,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:12,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429890599] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:13,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:13,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-12 15:39:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051145814] [2024-09-12 15:39:13,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:13,378 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:13,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:13,380 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:13,739 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-09-12 15:39:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:39:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-12 15:39:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:13,740 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:39:13,740 INFO L226 Difference]: Without dead ends: 55 [2024-09-12 15:39:13,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:39:13,741 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:13,742 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-12 15:39:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2024-09-12 15:39:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-09-12 15:39:13,751 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 37 [2024-09-12 15:39:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:13,752 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-09-12 15:39:13,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:13,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-09-12 15:39:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 15:39:13,752 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:13,753 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 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 15:39:13,769 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:13,956 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 15:39:13,957 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:13,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash -475395845, now seen corresponding path program 6 times [2024-09-12 15:39:13,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:13,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181921275] [2024-09-12 15:39:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:13,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:14,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:14,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:14,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:39:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181921275] [2024-09-12 15:39:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181921275] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086110752] [2024-09-12 15:39:14,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:14,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:14,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:14,248 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 15:39:14,249 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 15:39:14,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:39:14,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:14,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:39:14,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:14,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:15,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086110752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:15,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:15,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-12 15:39:15,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134291847] [2024-09-12 15:39:15,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:15,014 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:15,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:15,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:15,016 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:15,436 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2024-09-12 15:39:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:39:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-12 15:39:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:15,437 INFO L225 Difference]: With dead ends: 59 [2024-09-12 15:39:15,438 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 15:39:15,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:39:15,439 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:15,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 15:39:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-12 15:39:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2024-09-12 15:39:15,448 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2024-09-12 15:39:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:15,448 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2024-09-12 15:39:15,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:15,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2024-09-12 15:39:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 15:39:15,449 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:15,449 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 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 15:39:15,461 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 15:39:15,650 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 15:39:15,650 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:15,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1149616321, now seen corresponding path program 7 times [2024-09-12 15:39:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108268725] [2024-09-12 15:39:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:15,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:15,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:15,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:39:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:15,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108268725] [2024-09-12 15:39:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108268725] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:15,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818013925] [2024-09-12 15:39:15,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:15,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:15,984 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 15:39:15,986 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 15:39:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:16,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 15:39:16,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:16,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:16,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818013925] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:16,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:16,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-12 15:39:16,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66865980] [2024-09-12 15:39:16,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:16,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-12 15:39:16,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:16,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-12 15:39:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:39:16,953 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:17,491 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-12 15:39:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:39:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-12 15:39:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:17,493 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:39:17,493 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 15:39:17,494 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 15:39:17,494 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:17,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 15:39:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2024-09-12 15:39:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-09-12 15:39:17,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 38 [2024-09-12 15:39:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:17,503 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-09-12 15:39:17,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:17,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-09-12 15:39:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 15:39:17,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:17,504 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 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 15:39:17,521 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 15:39:17,705 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 15:39:17,705 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:17,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1335880383, now seen corresponding path program 7 times [2024-09-12 15:39:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:17,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977939582] [2024-09-12 15:39:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:17,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:17,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:17,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:39:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:18,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:18,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977939582] [2024-09-12 15:39:18,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977939582] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:18,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395875280] [2024-09-12 15:39:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:18,046 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 15:39:18,048 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 15:39:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:18,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 15:39:18,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:18,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:19,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395875280] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:19,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:19,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-12 15:39:19,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191846013] [2024-09-12 15:39:19,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:19,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-12 15:39:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-12 15:39:19,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:39:19,025 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:19,420 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-09-12 15:39:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:39:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-12 15:39:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:19,421 INFO L225 Difference]: With dead ends: 60 [2024-09-12 15:39:19,421 INFO L226 Difference]: Without dead ends: 51 [2024-09-12 15:39:19,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 15:39:19,423 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:19,424 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:39:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-12 15:39:19,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-12 15:39:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-09-12 15:39:19,435 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2024-09-12 15:39:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:19,435 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-09-12 15:39:19,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:19,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-09-12 15:39:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 15:39:19,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:19,436 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 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 15:39:19,453 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 15:39:19,636 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 15:39:19,637 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:19,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash 244399419, now seen corresponding path program 8 times [2024-09-12 15:39:19,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:19,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373778687] [2024-09-12 15:39:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:19,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:39:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:19,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373778687] [2024-09-12 15:39:19,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373778687] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:19,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570062020] [2024-09-12 15:39:19,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:19,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:19,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:19,953 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 15:39:19,954 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 15:39:20,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:20,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:20,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:39:20,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:20,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570062020] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:20,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:20,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-12 15:39:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231945596] [2024-09-12 15:39:20,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:20,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:39:20,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:20,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:39:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:20,759 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:21,266 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-09-12 15:39:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:39:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-12 15:39:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:21,268 INFO L225 Difference]: With dead ends: 67 [2024-09-12 15:39:21,268 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 15:39:21,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:39:21,269 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:21,270 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 15:39:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2024-09-12 15:39:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-12 15:39:21,280 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2024-09-12 15:39:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:21,280 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-12 15:39:21,281 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:21,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-12 15:39:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 15:39:21,282 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:21,282 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 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 15:39:21,299 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 15:39:21,482 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 15:39:21,483 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:21,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2122483680, now seen corresponding path program 8 times [2024-09-12 15:39:21,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:21,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477764792] [2024-09-12 15:39:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:21,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:39:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:21,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477764792] [2024-09-12 15:39:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477764792] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057931324] [2024-09-12 15:39:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:21,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:21,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:21,826 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 15:39:21,828 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 15:39:21,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:21,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:21,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:39:21,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:22,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:22,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057931324] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:22,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:22,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-12 15:39:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346203401] [2024-09-12 15:39:22,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:22,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:39:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:39:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:22,643 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:23,133 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2024-09-12 15:39:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:39:23,134 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-12 15:39:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:23,135 INFO L225 Difference]: With dead ends: 61 [2024-09-12 15:39:23,135 INFO L226 Difference]: Without dead ends: 49 [2024-09-12 15:39:23,136 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:39:23,136 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:23,136 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-12 15:39:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-12 15:39:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2024-09-12 15:39:23,146 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2024-09-12 15:39:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:23,147 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2024-09-12 15:39:23,147 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:23,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2024-09-12 15:39:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:39:23,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:23,148 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 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 15:39:23,164 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 15:39:23,348 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 15:39:23,349 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:23,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash 694635306, now seen corresponding path program 9 times [2024-09-12 15:39:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:23,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721828364] [2024-09-12 15:39:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:39:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:23,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:23,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721828364] [2024-09-12 15:39:23,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721828364] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:23,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237603013] [2024-09-12 15:39:23,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:23,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:23,703 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 15:39:23,705 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 15:39:23,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:39:23,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:23,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-12 15:39:23,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:24,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:24,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237603013] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:24,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:24,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-12 15:39:24,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392516280] [2024-09-12 15:39:24,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:24,658 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 15:39:24,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:24,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 15:39:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:39:24,659 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:25,185 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2024-09-12 15:39:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 15:39:25,186 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-12 15:39:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:25,187 INFO L225 Difference]: With dead ends: 67 [2024-09-12 15:39:25,187 INFO L226 Difference]: Without dead ends: 56 [2024-09-12 15:39:25,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-12 15:39:25,188 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:25,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 43 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-12 15:39:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-12 15:39:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2024-09-12 15:39:25,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 40 [2024-09-12 15:39:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:25,200 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2024-09-12 15:39:25,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:25,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2024-09-12 15:39:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:39:25,201 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:25,201 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 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 15:39:25,213 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 15:39:25,401 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 15:39:25,402 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:25,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash -119436570, now seen corresponding path program 9 times [2024-09-12 15:39:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:25,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593796806] [2024-09-12 15:39:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:25,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:25,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:25,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:25,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:39:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593796806] [2024-09-12 15:39:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593796806] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121552838] [2024-09-12 15:39:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:25,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:25,772 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 15:39:25,774 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 15:39:25,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:39:25,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:25,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-12 15:39:25,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:26,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:26,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121552838] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:26,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:26,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-12 15:39:26,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015730131] [2024-09-12 15:39:26,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:26,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 15:39:26,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 15:39:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:39:26,669 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:27,131 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-09-12 15:39:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 15:39:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-12 15:39:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:27,132 INFO L225 Difference]: With dead ends: 62 [2024-09-12 15:39:27,132 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 15:39:27,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-12 15:39:27,133 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:27,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 15:39:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-12 15:39:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2024-09-12 15:39:27,142 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2024-09-12 15:39:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:27,142 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2024-09-12 15:39:27,142 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:27,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2024-09-12 15:39:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 15:39:27,143 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:27,143 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 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 15:39:27,157 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-12 15:39:27,343 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 15:39:27,344 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:27,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1635413724, now seen corresponding path program 10 times [2024-09-12 15:39:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:27,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928955323] [2024-09-12 15:39:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:27,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:27,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:27,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:27,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:39:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:27,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928955323] [2024-09-12 15:39:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928955323] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369942647] [2024-09-12 15:39:27,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:27,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:27,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:27,733 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 15:39:27,735 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 15:39:27,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:27,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:27,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:39:27,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:28,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:28,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369942647] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:28,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:28,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-12 15:39:28,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824331841] [2024-09-12 15:39:28,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:28,619 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:39:28,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:39:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:39:28,621 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:29,137 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2024-09-12 15:39:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 15:39:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-12 15:39:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:29,138 INFO L225 Difference]: With dead ends: 69 [2024-09-12 15:39:29,138 INFO L226 Difference]: Without dead ends: 59 [2024-09-12 15:39:29,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-12 15:39:29,140 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:29,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-12 15:39:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2024-09-12 15:39:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-12 15:39:29,151 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2024-09-12 15:39:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:29,152 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-12 15:39:29,152 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:29,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-12 15:39:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 15:39:29,152 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:29,153 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 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 15:39:29,164 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 15:39:29,353 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 15:39:29,353 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:29,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1227536155, now seen corresponding path program 10 times [2024-09-12 15:39:29,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:29,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634618824] [2024-09-12 15:39:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:29,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:29,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:29,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:29,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:39:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:29,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:29,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634618824] [2024-09-12 15:39:29,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634618824] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:29,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353021097] [2024-09-12 15:39:29,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:29,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:29,712 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 15:39:29,713 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 15:39:29,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:29,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:29,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:39:29,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:30,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:30,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353021097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:30,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:30,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-12 15:39:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193104581] [2024-09-12 15:39:30,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:30,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:39:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:30,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:39:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:39:30,572 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:31,031 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2024-09-12 15:39:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 15:39:31,031 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-12 15:39:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:31,032 INFO L225 Difference]: With dead ends: 63 [2024-09-12 15:39:31,032 INFO L226 Difference]: Without dead ends: 51 [2024-09-12 15:39:31,033 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-12 15:39:31,033 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:31,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-12 15:39:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-12 15:39:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-09-12 15:39:31,046 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 41 [2024-09-12 15:39:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:31,046 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-09-12 15:39:31,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:31,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-09-12 15:39:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 15:39:31,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:31,047 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 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 15:39:31,059 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:31,247 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 15:39:31,248 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:31,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1744997279, now seen corresponding path program 11 times [2024-09-12 15:39:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513336081] [2024-09-12 15:39:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:31,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:31,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:31,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:39:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:31,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513336081] [2024-09-12 15:39:31,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513336081] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:31,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374931821] [2024-09-12 15:39:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:31,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:31,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:31,608 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 15:39:31,608 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 15:39:31,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:39:31,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:31,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 15:39:31,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:31,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374931821] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:32,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:32,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-12 15:39:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722330467] [2024-09-12 15:39:32,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:32,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-12 15:39:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-12 15:39:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 15:39:32,641 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:33,172 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-09-12 15:39:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 15:39:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-12 15:39:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:33,173 INFO L225 Difference]: With dead ends: 69 [2024-09-12 15:39:33,173 INFO L226 Difference]: Without dead ends: 58 [2024-09-12 15:39:33,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-12 15:39:33,175 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:33,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-12 15:39:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-12 15:39:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-09-12 15:39:33,191 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 42 [2024-09-12 15:39:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:33,191 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-09-12 15:39:33,191 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:33,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-09-12 15:39:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 15:39:33,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:33,192 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 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 15:39:33,207 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 15:39:33,396 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 15:39:33,396 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:33,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2010460257, now seen corresponding path program 11 times [2024-09-12 15:39:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263780035] [2024-09-12 15:39:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:33,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:33,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:33,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:39:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:33,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263780035] [2024-09-12 15:39:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263780035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128956384] [2024-09-12 15:39:33,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:33,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:33,799 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 15:39:33,801 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 15:39:33,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:39:33,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:33,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-12 15:39:33,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:34,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:34,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128956384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:34,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:34,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-12 15:39:34,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016057456] [2024-09-12 15:39:34,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:34,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-12 15:39:34,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:34,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-12 15:39:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 15:39:34,880 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:35,414 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-09-12 15:39:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 15:39:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-12 15:39:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:35,415 INFO L225 Difference]: With dead ends: 64 [2024-09-12 15:39:35,415 INFO L226 Difference]: Without dead ends: 55 [2024-09-12 15:39:35,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-12 15:39:35,416 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:35,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-12 15:39:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-12 15:39:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-09-12 15:39:35,427 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2024-09-12 15:39:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:35,427 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-09-12 15:39:35,428 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:35,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-09-12 15:39:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 15:39:35,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:35,429 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 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 15:39:35,440 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 15:39:35,630 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 15:39:35,630 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:35,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1050813403, now seen corresponding path program 12 times [2024-09-12 15:39:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015909727] [2024-09-12 15:39:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:35,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:35,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:35,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:39:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:36,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:36,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015909727] [2024-09-12 15:39:36,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015909727] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:36,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039168035] [2024-09-12 15:39:36,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:36,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:36,037 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 15:39:36,038 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 15:39:36,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:39:36,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:36,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:39:36,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:36,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:36,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039168035] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:36,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:36,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-12 15:39:36,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118602580] [2024-09-12 15:39:36,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:36,935 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-12 15:39:36,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-12 15:39:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:39:36,936 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:37,556 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-09-12 15:39:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 15:39:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-12 15:39:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:37,557 INFO L225 Difference]: With dead ends: 71 [2024-09-12 15:39:37,557 INFO L226 Difference]: Without dead ends: 61 [2024-09-12 15:39:37,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-12 15:39:37,559 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:37,559 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 67 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-12 15:39:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-09-12 15:39:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-09-12 15:39:37,577 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2024-09-12 15:39:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:37,577 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-09-12 15:39:37,578 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:37,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-09-12 15:39:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 15:39:37,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:37,580 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 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 15:39:37,595 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-12 15:39:37,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:37,781 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1465138944, now seen corresponding path program 12 times [2024-09-12 15:39:37,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:37,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220546957] [2024-09-12 15:39:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:37,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:37,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:38,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:39:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220546957] [2024-09-12 15:39:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220546957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486793457] [2024-09-12 15:39:38,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:38,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:38,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:38,192 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:38,195 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 15:39:38,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:39:38,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:38,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:39:38,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:38,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:39,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486793457] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:39,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:39,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-12 15:39:39,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91801650] [2024-09-12 15:39:39,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:39,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-12 15:39:39,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-12 15:39:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:39:39,148 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:39,672 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2024-09-12 15:39:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 15:39:39,673 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-12 15:39:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:39,674 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:39:39,674 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 15:39:39,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-12 15:39:39,675 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:39,676 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 15:39:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-12 15:39:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-09-12 15:39:39,692 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2024-09-12 15:39:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:39,692 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-09-12 15:39:39,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:39,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-09-12 15:39:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:39:39,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:39,694 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 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 15:39:39,709 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:39,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:39,895 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:39,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash -76334966, now seen corresponding path program 13 times [2024-09-12 15:39:39,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:39,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244846058] [2024-09-12 15:39:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:39,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:39,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:39,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:40,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:39:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:40,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:40,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244846058] [2024-09-12 15:39:40,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244846058] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:40,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604000796] [2024-09-12 15:39:40,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:40,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:40,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:40,267 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:40,268 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 15:39:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:40,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 15:39:40,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:40,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:41,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604000796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:41,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:41,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-12 15:39:41,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493163906] [2024-09-12 15:39:41,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:41,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-12 15:39:41,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:41,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-12 15:39:41,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:39:41,398 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:42,050 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2024-09-12 15:39:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:39:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-12 15:39:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:42,051 INFO L225 Difference]: With dead ends: 71 [2024-09-12 15:39:42,051 INFO L226 Difference]: Without dead ends: 60 [2024-09-12 15:39:42,052 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3635 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-12 15:39:42,053 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:42,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-12 15:39:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-09-12 15:39:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2024-09-12 15:39:42,066 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 44 [2024-09-12 15:39:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:42,067 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2024-09-12 15:39:42,067 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2024-09-12 15:39:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:39:42,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:42,068 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 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 15:39:42,085 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:42,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:42,269 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:42,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash -694353722, now seen corresponding path program 13 times [2024-09-12 15:39:42,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:42,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183024642] [2024-09-12 15:39:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:42,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:42,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:42,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:42,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:39:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183024642] [2024-09-12 15:39:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183024642] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283186235] [2024-09-12 15:39:42,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:42,673 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:42,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-12 15:39:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:42,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 15:39:42,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:43,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:43,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283186235] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:43,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:43,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-12 15:39:43,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493293431] [2024-09-12 15:39:43,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:43,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-12 15:39:43,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-12 15:39:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:39:43,770 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:44,378 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-09-12 15:39:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:39:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-12 15:39:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:44,379 INFO L225 Difference]: With dead ends: 66 [2024-09-12 15:39:44,379 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 15:39:44,380 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-12 15:39:44,381 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:44,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 52 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 15:39:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-12 15:39:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 47 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-09-12 15:39:44,395 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 44 [2024-09-12 15:39:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:44,396 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-09-12 15:39:44,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:44,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-09-12 15:39:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 15:39:44,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:44,397 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 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 15:39:44,413 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:44,597 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-12 15:39:44,598 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:44,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1951796860, now seen corresponding path program 14 times [2024-09-12 15:39:44,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:44,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614978046] [2024-09-12 15:39:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:44,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:44,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:44,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:39:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:45,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:45,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614978046] [2024-09-12 15:39:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614978046] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:45,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921655672] [2024-09-12 15:39:45,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:45,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:45,026 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:45,031 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-12 15:39:45,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:45,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:39:45,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:45,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:46,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921655672] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:46,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:46,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-12 15:39:46,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573104859] [2024-09-12 15:39:46,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:46,032 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-12 15:39:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-12 15:39:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 15:39:46,033 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:46,635 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-09-12 15:39:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:39:46,635 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-12 15:39:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:46,636 INFO L225 Difference]: With dead ends: 73 [2024-09-12 15:39:46,636 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 15:39:46,636 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-12 15:39:46,637 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:46,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 15:39:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-09-12 15:39:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-09-12 15:39:46,648 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 45 [2024-09-12 15:39:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:46,648 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-09-12 15:39:46,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:46,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-09-12 15:39:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 15:39:46,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:46,649 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 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 15:39:46,665 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-12 15:39:46,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 15:39:46,850 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:46,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash 584973627, now seen corresponding path program 14 times [2024-09-12 15:39:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162708757] [2024-09-12 15:39:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:46,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:46,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:47,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:39:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:47,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162708757] [2024-09-12 15:39:47,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162708757] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935473547] [2024-09-12 15:39:47,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:47,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:47,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:47,221 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:47,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-12 15:39:47,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:47,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:47,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:39:47,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:47,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935473547] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:48,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:48,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-12 15:39:48,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947017039] [2024-09-12 15:39:48,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:48,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-12 15:39:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-12 15:39:48,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 15:39:48,242 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:48,875 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-09-12 15:39:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:39:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-12 15:39:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:48,876 INFO L225 Difference]: With dead ends: 67 [2024-09-12 15:39:48,876 INFO L226 Difference]: Without dead ends: 55 [2024-09-12 15:39:48,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-12 15:39:48,877 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:48,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 70 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-12 15:39:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-12 15:39:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-09-12 15:39:48,892 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 45 [2024-09-12 15:39:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:48,892 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-09-12 15:39:48,893 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:48,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-09-12 15:39:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 15:39:48,894 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:48,894 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 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 15:39:48,910 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:49,094 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 15:39:49,095 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:49,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1332027393, now seen corresponding path program 15 times [2024-09-12 15:39:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:49,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20977170] [2024-09-12 15:39:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:39:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:49,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20977170] [2024-09-12 15:39:49,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20977170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:49,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682230657] [2024-09-12 15:39:49,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:49,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:49,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:49,546 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:49,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-12 15:39:49,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 15:39:49,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:49,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-12 15:39:49,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:50,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:50,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682230657] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:50,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:50,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-12 15:39:50,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139800685] [2024-09-12 15:39:50,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:50,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-12 15:39:50,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:50,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-12 15:39:50,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-12 15:39:50,797 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:51,483 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2024-09-12 15:39:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-12 15:39:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:51,484 INFO L225 Difference]: With dead ends: 73 [2024-09-12 15:39:51,484 INFO L226 Difference]: Without dead ends: 62 [2024-09-12 15:39:51,485 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4317 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-12 15:39:51,485 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:51,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 52 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-12 15:39:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-09-12 15:39:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2024-09-12 15:39:51,501 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 46 [2024-09-12 15:39:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:51,501 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2024-09-12 15:39:51,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:51,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2024-09-12 15:39:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 15:39:51,502 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:51,503 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 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 15:39:51,517 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-12 15:39:51,703 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-12 15:39:51,703 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:51,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:51,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1719770239, now seen corresponding path program 15 times [2024-09-12 15:39:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:51,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120647059] [2024-09-12 15:39:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:51,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:51,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:51,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:51,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:39:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:52,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:52,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120647059] [2024-09-12 15:39:52,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120647059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:52,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962168642] [2024-09-12 15:39:52,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:52,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:52,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:52,213 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:52,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-12 15:39:52,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 15:39:52,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:52,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-12 15:39:52,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:52,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:53,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962168642] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:53,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:53,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-12 15:39:53,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572996979] [2024-09-12 15:39:53,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:53,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-12 15:39:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-12 15:39:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-12 15:39:53,500 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:54,212 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-09-12 15:39:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:54,213 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-12 15:39:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:54,213 INFO L225 Difference]: With dead ends: 68 [2024-09-12 15:39:54,213 INFO L226 Difference]: Without dead ends: 59 [2024-09-12 15:39:54,215 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-12 15:39:54,215 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:54,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-12 15:39:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-12 15:39:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2024-09-12 15:39:54,235 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 46 [2024-09-12 15:39:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:54,235 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2024-09-12 15:39:54,236 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:54,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2024-09-12 15:39:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 15:39:54,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:54,236 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 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 15:39:54,249 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-12 15:39:54,437 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-12 15:39:54,437 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:54,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1395555717, now seen corresponding path program 16 times [2024-09-12 15:39:54,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:54,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047883688] [2024-09-12 15:39:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:54,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:54,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:54,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:39:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:54,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:54,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047883688] [2024-09-12 15:39:54,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047883688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:54,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10184314] [2024-09-12 15:39:54,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:54,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:54,938 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:54,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 15:39:55,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:55,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:39:55,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:55,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:56,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10184314] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:56,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:56,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-12 15:39:56,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825478308] [2024-09-12 15:39:56,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:56,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-12 15:39:56,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-12 15:39:56,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-12 15:39:56,094 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:56,819 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2024-09-12 15:39:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-12 15:39:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:56,820 INFO L225 Difference]: With dead ends: 75 [2024-09-12 15:39:56,820 INFO L226 Difference]: Without dead ends: 65 [2024-09-12 15:39:56,821 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4295 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-12 15:39:56,821 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:56,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-12 15:39:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2024-09-12 15:39:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-09-12 15:39:56,843 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 47 [2024-09-12 15:39:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:56,843 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-09-12 15:39:56,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:56,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-09-12 15:39:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 15:39:56,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:56,844 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 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 15:39:56,860 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:57,045 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 15:39:57,045 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:57,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1138167328, now seen corresponding path program 16 times [2024-09-12 15:39:57,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:57,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153058828] [2024-09-12 15:39:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:57,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:39:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:57,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153058828] [2024-09-12 15:39:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153058828] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725115779] [2024-09-12 15:39:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:57,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:57,451 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:57,452 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 15:39:57,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:57,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:57,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:39:57,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:57,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:58,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725115779] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:58,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:58,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-12 15:39:58,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967899141] [2024-09-12 15:39:58,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:58,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-12 15:39:58,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-12 15:39:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-12 15:39:58,639 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:59,216 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2024-09-12 15:39:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-12 15:39:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:59,217 INFO L225 Difference]: With dead ends: 69 [2024-09-12 15:39:59,217 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 15:39:59,218 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-12 15:39:59,218 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:59,218 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 15:39:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-12 15:39:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:39:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-09-12 15:39:59,235 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2024-09-12 15:39:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:59,235 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-09-12 15:39:59,235 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:59,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-09-12 15:39:59,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:39:59,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:59,236 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 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 15:39:59,250 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-12 15:39:59,440 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 15:39:59,441 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:59,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1395633642, now seen corresponding path program 17 times [2024-09-12 15:39:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:59,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907532602] [2024-09-12 15:39:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:59,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:59,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:59,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:39:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:39:59,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907532602] [2024-09-12 15:39:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907532602] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662687144] [2024-09-12 15:39:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:59,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:59,953 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:59,955 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 15:40:00,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 15:40:00,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:00,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 15:40:00,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:00,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:01,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662687144] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:01,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:01,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-12 15:40:01,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492037991] [2024-09-12 15:40:01,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:01,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-12 15:40:01,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:01,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-12 15:40:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-12 15:40:01,361 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:02,063 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2024-09-12 15:40:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-12 15:40:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-12 15:40:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:02,064 INFO L225 Difference]: With dead ends: 75 [2024-09-12 15:40:02,064 INFO L226 Difference]: Without dead ends: 64 [2024-09-12 15:40:02,064 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-12 15:40:02,065 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:02,065 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-12 15:40:02,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-12 15:40:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-09-12 15:40:02,080 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 48 [2024-09-12 15:40:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:02,081 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-09-12 15:40:02,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:02,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-09-12 15:40:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:40:02,081 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:02,082 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 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 15:40:02,097 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:02,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 15:40:02,282 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:02,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 206102182, now seen corresponding path program 17 times [2024-09-12 15:40:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341624844] [2024-09-12 15:40:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:02,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:02,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:02,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:40:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:02,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341624844] [2024-09-12 15:40:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341624844] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631234773] [2024-09-12 15:40:02,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:40:02,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:02,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:02,793 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:02,795 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 15:40:02,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 15:40:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:02,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 15:40:02,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:03,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631234773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:04,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:04,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-12 15:40:04,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982289360] [2024-09-12 15:40:04,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:04,140 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-12 15:40:04,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-12 15:40:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-12 15:40:04,142 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:04,826 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-09-12 15:40:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-12 15:40:04,826 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-12 15:40:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:04,827 INFO L225 Difference]: With dead ends: 70 [2024-09-12 15:40:04,827 INFO L226 Difference]: Without dead ends: 61 [2024-09-12 15:40:04,829 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-12 15:40:04,829 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:04,829 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-12 15:40:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-12 15:40:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-09-12 15:40:04,849 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 48 [2024-09-12 15:40:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:04,849 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-09-12 15:40:04,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:04,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-09-12 15:40:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:40:04,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:04,850 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 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 15:40:04,866 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-12 15:40:05,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:05,051 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:05,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash 118315492, now seen corresponding path program 18 times [2024-09-12 15:40:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:05,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802069576] [2024-09-12 15:40:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:05,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:05,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:05,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:40:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802069576] [2024-09-12 15:40:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802069576] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818973188] [2024-09-12 15:40:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:40:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:05,491 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:05,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 15:40:05,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 15:40:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:05,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:40:05,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:06,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818973188] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:06,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:06,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-12 15:40:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488686852] [2024-09-12 15:40:06,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:06,798 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-12 15:40:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-12 15:40:06,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-12 15:40:06,799 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:07,477 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2024-09-12 15:40:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-12 15:40:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-12 15:40:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:07,479 INFO L225 Difference]: With dead ends: 77 [2024-09-12 15:40:07,479 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 15:40:07,480 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5088 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-12 15:40:07,480 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:07,480 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 28 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 15:40:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2024-09-12 15:40:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-09-12 15:40:07,495 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 49 [2024-09-12 15:40:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:07,495 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-09-12 15:40:07,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:07,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-09-12 15:40:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:40:07,496 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:07,496 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 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 15:40:07,510 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-12 15:40:07,696 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:07,697 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:07,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1565664421, now seen corresponding path program 18 times [2024-09-12 15:40:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:07,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699279067] [2024-09-12 15:40:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:07,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:07,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:07,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:07,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:40:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:08,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:08,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699279067] [2024-09-12 15:40:08,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699279067] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:08,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319805631] [2024-09-12 15:40:08,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:40:08,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:08,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:08,102 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:08,103 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-12 15:40:08,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 15:40:08,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:08,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:40:08,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:08,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319805631] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:09,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-12 15:40:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076867686] [2024-09-12 15:40:09,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:09,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-12 15:40:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-12 15:40:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-12 15:40:09,456 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:10,126 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2024-09-12 15:40:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-12 15:40:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-12 15:40:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:10,127 INFO L225 Difference]: With dead ends: 71 [2024-09-12 15:40:10,127 INFO L226 Difference]: Without dead ends: 59 [2024-09-12 15:40:10,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5083 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-12 15:40:10,128 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:10,128 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-12 15:40:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-12 15:40:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2024-09-12 15:40:10,145 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2024-09-12 15:40:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:10,145 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2024-09-12 15:40:10,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:10,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2024-09-12 15:40:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:40:10,146 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:10,146 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 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 15:40:10,162 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:10,347 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:10,347 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:10,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:10,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1081000865, now seen corresponding path program 19 times [2024-09-12 15:40:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:10,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104097213] [2024-09-12 15:40:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:10,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:10,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:10,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:40:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:10,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104097213] [2024-09-12 15:40:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104097213] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539224668] [2024-09-12 15:40:10,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:40:10,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:10,771 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:10,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-12 15:40:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:10,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 15:40:10,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:11,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:12,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539224668] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:12,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:12,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-12 15:40:12,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264515688] [2024-09-12 15:40:12,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:12,347 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-12 15:40:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-12 15:40:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 15:40:12,349 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:13,164 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2024-09-12 15:40:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 15:40:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-12 15:40:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:13,165 INFO L225 Difference]: With dead ends: 77 [2024-09-12 15:40:13,165 INFO L226 Difference]: Without dead ends: 66 [2024-09-12 15:40:13,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5976 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-12 15:40:13,166 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:13,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 58 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-12 15:40:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2024-09-12 15:40:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2024-09-12 15:40:13,185 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 50 [2024-09-12 15:40:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:13,186 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2024-09-12 15:40:13,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:13,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2024-09-12 15:40:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:40:13,187 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:13,187 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 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 15:40:13,204 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-12 15:40:13,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-12 15:40:13,387 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:13,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:13,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1787145889, now seen corresponding path program 19 times [2024-09-12 15:40:13,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:13,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874902499] [2024-09-12 15:40:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:13,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:40:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:13,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:13,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874902499] [2024-09-12 15:40:13,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874902499] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:13,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948575285] [2024-09-12 15:40:13,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:40:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:13,893 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:13,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-12 15:40:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:14,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 15:40:14,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:14,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:15,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948575285] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:15,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:15,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-12 15:40:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981108024] [2024-09-12 15:40:15,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:15,384 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-12 15:40:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-12 15:40:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 15:40:15,385 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:16,199 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-09-12 15:40:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 15:40:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-12 15:40:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:16,200 INFO L225 Difference]: With dead ends: 72 [2024-09-12 15:40:16,201 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 15:40:16,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-12 15:40:16,202 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:16,202 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 67 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 15:40:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-12 15:40:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-09-12 15:40:16,220 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 50 [2024-09-12 15:40:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:16,221 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-09-12 15:40:16,221 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:16,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-09-12 15:40:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 15:40:16,221 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:16,221 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 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 15:40:16,233 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:16,422 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-12 15:40:16,422 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:16,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1938905371, now seen corresponding path program 20 times [2024-09-12 15:40:16,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:16,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962500889] [2024-09-12 15:40:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:16,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:16,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:16,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:16,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:40:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:16,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962500889] [2024-09-12 15:40:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962500889] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374103440] [2024-09-12 15:40:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:40:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:16,910 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:16,911 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-12 15:40:17,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:40:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:17,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:40:17,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:17,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:18,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374103440] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:18,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:18,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-12 15:40:18,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779080338] [2024-09-12 15:40:18,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:18,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-12 15:40:18,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-12 15:40:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-12 15:40:18,375 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:19,095 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-09-12 15:40:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 15:40:19,095 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-12 15:40:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:19,096 INFO L225 Difference]: With dead ends: 79 [2024-09-12 15:40:19,097 INFO L226 Difference]: Without dead ends: 69 [2024-09-12 15:40:19,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5948 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-12 15:40:19,100 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:19,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-12 15:40:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-09-12 15:40:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-09-12 15:40:19,114 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 51 [2024-09-12 15:40:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:19,114 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-09-12 15:40:19,115 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:19,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-09-12 15:40:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 15:40:19,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:19,116 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 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 15:40:19,130 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:19,316 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:19,316 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:19,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:19,317 INFO L85 PathProgramCache]: Analyzing trace with hash 202050240, now seen corresponding path program 20 times [2024-09-12 15:40:19,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:19,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081896953] [2024-09-12 15:40:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:19,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:19,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:19,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:40:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:19,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:19,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081896953] [2024-09-12 15:40:19,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081896953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:19,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163914640] [2024-09-12 15:40:19,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:40:19,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:19,771 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:19,772 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-12 15:40:19,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:40:19,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:19,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:40:19,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:20,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:21,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163914640] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:21,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:21,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-12 15:40:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796075593] [2024-09-12 15:40:21,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:21,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-12 15:40:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-12 15:40:21,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-12 15:40:21,223 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:21,948 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2024-09-12 15:40:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 15:40:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-12 15:40:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:21,949 INFO L225 Difference]: With dead ends: 73 [2024-09-12 15:40:21,950 INFO L226 Difference]: Without dead ends: 61 [2024-09-12 15:40:21,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-12 15:40:21,951 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:21,953 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-12 15:40:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-12 15:40:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2024-09-12 15:40:21,973 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 51 [2024-09-12 15:40:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:21,974 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2024-09-12 15:40:21,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:21,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2024-09-12 15:40:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:40:21,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:21,975 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 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 15:40:21,991 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-12 15:40:22,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:22,175 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:22,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1684712266, now seen corresponding path program 21 times [2024-09-12 15:40:22,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:22,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750503905] [2024-09-12 15:40:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:22,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:22,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:22,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:22,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:40:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:22,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:22,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750503905] [2024-09-12 15:40:22,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750503905] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:22,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164832009] [2024-09-12 15:40:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:40:22,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:22,669 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:22,670 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-12 15:40:22,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 15:40:22,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:22,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 15:40:22,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:23,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:24,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164832009] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:24,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:24,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-12 15:40:24,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660016777] [2024-09-12 15:40:24,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:24,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-12 15:40:24,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-12 15:40:24,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-12 15:40:24,369 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:25,275 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2024-09-12 15:40:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 15:40:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-12 15:40:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:25,277 INFO L225 Difference]: With dead ends: 79 [2024-09-12 15:40:25,277 INFO L226 Difference]: Without dead ends: 68 [2024-09-12 15:40:25,278 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6906 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-12 15:40:25,279 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:25,279 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 58 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-12 15:40:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-09-12 15:40:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-09-12 15:40:25,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 52 [2024-09-12 15:40:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:25,299 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-09-12 15:40:25,300 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-09-12 15:40:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:40:25,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:25,301 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 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 15:40:25,315 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-12 15:40:25,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-12 15:40:25,501 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:25,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1027286150, now seen corresponding path program 21 times [2024-09-12 15:40:25,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:25,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060301514] [2024-09-12 15:40:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:25,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:25,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:25,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:40:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:26,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:26,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060301514] [2024-09-12 15:40:26,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060301514] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157279304] [2024-09-12 15:40:26,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:40:26,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:26,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:26,058 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:26,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-12 15:40:26,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 15:40:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:26,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 15:40:26,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:26,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:27,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157279304] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:27,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:27,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-12 15:40:27,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206003488] [2024-09-12 15:40:27,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:27,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-12 15:40:27,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:27,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-12 15:40:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-12 15:40:27,698 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:28,515 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-09-12 15:40:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 15:40:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-12 15:40:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:28,517 INFO L225 Difference]: With dead ends: 74 [2024-09-12 15:40:28,517 INFO L226 Difference]: Without dead ends: 65 [2024-09-12 15:40:28,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-12 15:40:28,518 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:28,518 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-12 15:40:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-12 15:40:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-09-12 15:40:28,533 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 52 [2024-09-12 15:40:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:28,533 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-09-12 15:40:28,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:28,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-09-12 15:40:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:40:28,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:28,534 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 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 15:40:28,546 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:28,734 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-12 15:40:28,735 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:28,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:28,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1497221700, now seen corresponding path program 22 times [2024-09-12 15:40:28,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:28,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593688115] [2024-09-12 15:40:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:28,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:28,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:28,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:40:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:29,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:29,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593688115] [2024-09-12 15:40:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593688115] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:29,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406975543] [2024-09-12 15:40:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:40:29,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:29,254 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:29,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-12 15:40:29,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:40:29,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:29,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:40:29,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:29,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:30,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406975543] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:30,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:30,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-12 15:40:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288503407] [2024-09-12 15:40:30,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:30,814 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-12 15:40:30,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-12 15:40:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-12 15:40:30,815 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:31,620 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-09-12 15:40:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 15:40:31,620 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-12 15:40:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:31,621 INFO L225 Difference]: With dead ends: 81 [2024-09-12 15:40:31,621 INFO L226 Difference]: Without dead ends: 71 [2024-09-12 15:40:31,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-12 15:40:31,622 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:31,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:31,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-12 15:40:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2024-09-12 15:40:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-09-12 15:40:31,643 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2024-09-12 15:40:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:31,644 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-09-12 15:40:31,644 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:31,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-09-12 15:40:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:40:31,645 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:31,645 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 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 15:40:31,659 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-12 15:40:31,845 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-12 15:40:31,846 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:31,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1878765189, now seen corresponding path program 22 times [2024-09-12 15:40:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:31,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672773726] [2024-09-12 15:40:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:31,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:31,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:32,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:40:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:32,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:32,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672773726] [2024-09-12 15:40:32,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672773726] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:32,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428908094] [2024-09-12 15:40:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:40:32,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:32,317 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:32,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-12 15:40:32,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:40:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:32,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:40:32,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:32,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:33,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428908094] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:33,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:33,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-12 15:40:33,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884742783] [2024-09-12 15:40:33,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:33,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-12 15:40:33,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-12 15:40:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-12 15:40:33,921 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:34,675 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2024-09-12 15:40:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 15:40:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-12 15:40:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:34,677 INFO L225 Difference]: With dead ends: 75 [2024-09-12 15:40:34,677 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 15:40:34,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6870 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-12 15:40:34,679 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:34,679 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 15:40:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-12 15:40:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-09-12 15:40:34,700 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 53 [2024-09-12 15:40:34,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:34,700 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-09-12 15:40:34,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:34,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-09-12 15:40:34,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:40:34,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:34,701 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 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 15:40:34,713 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:34,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:34,902 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:34,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash 877420353, now seen corresponding path program 23 times [2024-09-12 15:40:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:34,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219421871] [2024-09-12 15:40:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:34,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:34,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:34,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:35,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:40:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:35,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:35,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219421871] [2024-09-12 15:40:35,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219421871] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:35,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764089646] [2024-09-12 15:40:35,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:40:35,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:35,546 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:35,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-12 15:40:35,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 15:40:35,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:35,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 15:40:35,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:36,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:37,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764089646] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:37,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:37,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-12 15:40:37,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405476584] [2024-09-12 15:40:37,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:37,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-12 15:40:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-12 15:40:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-12 15:40:37,507 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:38,370 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-09-12 15:40:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-12 15:40:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-12 15:40:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:38,371 INFO L225 Difference]: With dead ends: 81 [2024-09-12 15:40:38,372 INFO L226 Difference]: Without dead ends: 70 [2024-09-12 15:40:38,373 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7975 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-12 15:40:38,374 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:38,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 46 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-12 15:40:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-09-12 15:40:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2024-09-12 15:40:38,396 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 54 [2024-09-12 15:40:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:38,396 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2024-09-12 15:40:38,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:38,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2024-09-12 15:40:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:40:38,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:38,397 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 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 15:40:38,414 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-12 15:40:38,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:38,598 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:38,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash 898961857, now seen corresponding path program 23 times [2024-09-12 15:40:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693746313] [2024-09-12 15:40:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:38,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:38,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:38,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:40:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693746313] [2024-09-12 15:40:39,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693746313] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592922665] [2024-09-12 15:40:39,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:40:39,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:39,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:39,213 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:39,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-12 15:40:39,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 15:40:39,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:39,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 15:40:39,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:39,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:41,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592922665] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:41,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:41,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-12 15:40:41,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033189174] [2024-09-12 15:40:41,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:41,039 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-12 15:40:41,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-12 15:40:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-12 15:40:41,041 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:41,910 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2024-09-12 15:40:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-12 15:40:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-12 15:40:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:41,911 INFO L225 Difference]: With dead ends: 76 [2024-09-12 15:40:41,911 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 15:40:41,913 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7931 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-12 15:40:41,913 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:41,913 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 55 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 15:40:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-12 15:40:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-09-12 15:40:41,929 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 54 [2024-09-12 15:40:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:41,930 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-09-12 15:40:41,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:41,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-09-12 15:40:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 15:40:41,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:41,930 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 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 15:40:41,942 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-12 15:40:42,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:42,131 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:42,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1087612859, now seen corresponding path program 24 times [2024-09-12 15:40:42,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:42,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087932252] [2024-09-12 15:40:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:42,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:42,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:42,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:40:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:42,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087932252] [2024-09-12 15:40:42,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087932252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735626505] [2024-09-12 15:40:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:40:42,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:42,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:42,742 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:42,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-12 15:40:42,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-12 15:40:42,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:42,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:40:42,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:43,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:44,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735626505] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:44,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:44,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-12 15:40:44,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719127344] [2024-09-12 15:40:44,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:44,464 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-12 15:40:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-12 15:40:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-12 15:40:44,466 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:45,390 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-09-12 15:40:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-12 15:40:45,391 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-12 15:40:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:45,392 INFO L225 Difference]: With dead ends: 83 [2024-09-12 15:40:45,392 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 15:40:45,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-12 15:40:45,393 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:45,393 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 58 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 15:40:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2024-09-12 15:40:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-09-12 15:40:45,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2024-09-12 15:40:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:45,416 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-09-12 15:40:45,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:45,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-09-12 15:40:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 15:40:45,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:45,418 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 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 15:40:45,434 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-09-12 15:40:45,618 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-09-12 15:40:45,618 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:45,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:45,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1561850976, now seen corresponding path program 24 times [2024-09-12 15:40:45,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:45,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415322783] [2024-09-12 15:40:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:45,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:45,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:45,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:45,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:40:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:46,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415322783] [2024-09-12 15:40:46,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415322783] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:46,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181443680] [2024-09-12 15:40:46,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:40:46,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:46,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:46,162 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:46,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-12 15:40:46,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-12 15:40:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:46,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:40:46,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:46,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:47,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181443680] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:47,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:47,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-12 15:40:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011024583] [2024-09-12 15:40:47,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:47,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-12 15:40:47,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-12 15:40:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-12 15:40:47,909 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:48,782 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2024-09-12 15:40:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-12 15:40:48,782 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-12 15:40:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:48,783 INFO L225 Difference]: With dead ends: 77 [2024-09-12 15:40:48,783 INFO L226 Difference]: Without dead ends: 65 [2024-09-12 15:40:48,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-12 15:40:48,785 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:48,785 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-12 15:40:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-12 15:40:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 55 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-09-12 15:40:48,800 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 55 [2024-09-12 15:40:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:48,800 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-09-12 15:40:48,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:48,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-09-12 15:40:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:40:48,801 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:48,801 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 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 15:40:48,819 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:49,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-09-12 15:40:49,002 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:49,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1064448170, now seen corresponding path program 25 times [2024-09-12 15:40:49,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:49,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329918428] [2024-09-12 15:40:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:49,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:49,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:49,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:49,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:40:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329918428] [2024-09-12 15:40:49,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329918428] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725302092] [2024-09-12 15:40:49,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:40:49,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:49,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:49,610 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:49,611 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-12 15:40:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:49,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-12 15:40:49,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:50,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:51,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725302092] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:51,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:51,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-12 15:40:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704472386] [2024-09-12 15:40:51,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:51,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-12 15:40:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-12 15:40:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-12 15:40:51,643 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:52,570 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2024-09-12 15:40:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-12 15:40:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-12 15:40:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:52,572 INFO L225 Difference]: With dead ends: 83 [2024-09-12 15:40:52,572 INFO L226 Difference]: Without dead ends: 72 [2024-09-12 15:40:52,573 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8967 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-12 15:40:52,573 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:52,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:40:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-12 15:40:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-09-12 15:40:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-09-12 15:40:52,590 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 56 [2024-09-12 15:40:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:52,590 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-09-12 15:40:52,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:52,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-09-12 15:40:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:40:52,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:52,591 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 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 15:40:52,603 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-09-12 15:40:52,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:52,792 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:52,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash 659149414, now seen corresponding path program 25 times [2024-09-12 15:40:52,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:52,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597568949] [2024-09-12 15:40:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:52,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:52,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:52,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:53,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:40:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:53,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597568949] [2024-09-12 15:40:53,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597568949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106285435] [2024-09-12 15:40:53,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:40:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:53,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:53,431 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:53,432 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-12 15:40:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:53,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-12 15:40:53,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:54,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106285435] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:55,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:55,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-12 15:40:55,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699383021] [2024-09-12 15:40:55,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:55,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-12 15:40:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-12 15:40:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-12 15:40:55,437 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:56,393 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2024-09-12 15:40:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-12 15:40:56,394 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-12 15:40:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:56,394 INFO L225 Difference]: With dead ends: 78 [2024-09-12 15:40:56,394 INFO L226 Difference]: Without dead ends: 69 [2024-09-12 15:40:56,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8997 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-12 15:40:56,396 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:56,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 55 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-12 15:40:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-12 15:40:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:40:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-09-12 15:40:56,421 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 56 [2024-09-12 15:40:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:56,421 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-09-12 15:40:56,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:56,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-09-12 15:40:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:40:56,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:56,422 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 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 15:40:56,435 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:56,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:56,622 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:56,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1195983524, now seen corresponding path program 26 times [2024-09-12 15:40:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:56,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222184962] [2024-09-12 15:40:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:56,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:56,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:56,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:56,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:57,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:57,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222184962] [2024-09-12 15:40:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222184962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:57,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685631140] [2024-09-12 15:40:57,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:40:57,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:57,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:57,255 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:57,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-12 15:40:57,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:40:57,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:57,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:40:57,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:58,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:40:59,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685631140] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:59,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:59,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-12 15:40:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894748744] [2024-09-12 15:40:59,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:59,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-12 15:40:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-12 15:40:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-12 15:40:59,191 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:00,141 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2024-09-12 15:41:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-12 15:41:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-12 15:41:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:00,143 INFO L225 Difference]: With dead ends: 85 [2024-09-12 15:41:00,143 INFO L226 Difference]: Without dead ends: 75 [2024-09-12 15:41:00,144 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8930 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-12 15:41:00,144 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:00,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-12 15:41:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2024-09-12 15:41:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-09-12 15:41:00,170 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 57 [2024-09-12 15:41:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:00,170 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-09-12 15:41:00,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:00,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-09-12 15:41:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:41:00,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:00,171 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 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 15:41:00,190 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-09-12 15:41:00,372 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-12 15:41:00,372 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:00,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -406102117, now seen corresponding path program 26 times [2024-09-12 15:41:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:00,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379525606] [2024-09-12 15:41:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:00,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:00,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:00,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:41:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:00,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379525606] [2024-09-12 15:41:00,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379525606] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316196488] [2024-09-12 15:41:00,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:41:00,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:00,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:00,908 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:00,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-12 15:41:01,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:41:01,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:01,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:41:01,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:01,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:02,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316196488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:02,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:02,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-12 15:41:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538843084] [2024-09-12 15:41:02,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:02,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-12 15:41:02,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-12 15:41:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-12 15:41:02,921 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:03,835 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2024-09-12 15:41:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-12 15:41:03,835 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-12 15:41:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:03,836 INFO L225 Difference]: With dead ends: 79 [2024-09-12 15:41:03,836 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 15:41:03,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8925 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-12 15:41:03,838 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:03,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:41:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 15:41:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-12 15:41:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2024-09-12 15:41:03,858 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2024-09-12 15:41:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:03,858 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2024-09-12 15:41:03,858 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:03,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2024-09-12 15:41:03,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:41:03,859 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:03,859 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 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 15:41:03,872 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:04,059 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-12 15:41:04,060 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:04,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 128971489, now seen corresponding path program 27 times [2024-09-12 15:41:04,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:04,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499647799] [2024-09-12 15:41:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:04,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:04,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:04,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:04,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:41:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:04,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499647799] [2024-09-12 15:41:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499647799] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569286073] [2024-09-12 15:41:04,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:41:04,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:04,661 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:04,662 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-12 15:41:04,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-12 15:41:04,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:04,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 15:41:04,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:05,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:06,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569286073] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:06,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:06,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-12 15:41:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784229703] [2024-09-12 15:41:06,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:06,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-12 15:41:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-12 15:41:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-12 15:41:06,922 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:07,936 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-09-12 15:41:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-12 15:41:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-12 15:41:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:07,937 INFO L225 Difference]: With dead ends: 85 [2024-09-12 15:41:07,937 INFO L226 Difference]: Without dead ends: 74 [2024-09-12 15:41:07,938 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10098 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-12 15:41:07,939 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:07,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 37 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:41:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-12 15:41:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2024-09-12 15:41:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-09-12 15:41:07,956 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 58 [2024-09-12 15:41:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:07,956 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-09-12 15:41:07,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:07,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-09-12 15:41:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:41:07,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:07,957 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 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 15:41:07,970 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-09-12 15:41:08,157 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-12 15:41:08,158 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:08,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash -623473439, now seen corresponding path program 27 times [2024-09-12 15:41:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625151126] [2024-09-12 15:41:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:08,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:08,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:08,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:41:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:08,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:08,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625151126] [2024-09-12 15:41:08,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625151126] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:08,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010355704] [2024-09-12 15:41:08,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:41:08,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:08,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:08,961 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:08,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-12 15:41:09,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-12 15:41:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:09,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 15:41:09,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:09,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:11,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010355704] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:11,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:11,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-12 15:41:11,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396610402] [2024-09-12 15:41:11,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:11,130 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-12 15:41:11,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-12 15:41:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-12 15:41:11,131 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:12,189 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2024-09-12 15:41:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-12 15:41:12,189 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-12 15:41:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:12,190 INFO L225 Difference]: With dead ends: 80 [2024-09-12 15:41:12,190 INFO L226 Difference]: Without dead ends: 71 [2024-09-12 15:41:12,192 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10130 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-12 15:41:12,192 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:12,192 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-12 15:41:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-12 15:41:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 61 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2024-09-12 15:41:12,210 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 58 [2024-09-12 15:41:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:12,210 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2024-09-12 15:41:12,210 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:12,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2024-09-12 15:41:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:41:12,211 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:12,211 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 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 15:41:12,229 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:12,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-12 15:41:12,412 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:12,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1980395099, now seen corresponding path program 28 times [2024-09-12 15:41:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:12,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830934602] [2024-09-12 15:41:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:12,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:12,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:12,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:13,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830934602] [2024-09-12 15:41:13,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830934602] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:13,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613069437] [2024-09-12 15:41:13,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:41:13,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:13,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:13,115 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:13,117 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-12 15:41:13,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:41:13,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:13,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 15:41:13,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:13,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:15,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613069437] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:15,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:15,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-12 15:41:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057082300] [2024-09-12 15:41:15,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:15,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-12 15:41:15,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-12 15:41:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-12 15:41:15,202 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:16,204 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2024-09-12 15:41:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-12 15:41:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-12 15:41:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:16,206 INFO L225 Difference]: With dead ends: 87 [2024-09-12 15:41:16,206 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 15:41:16,208 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10058 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-12 15:41:16,208 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:16,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 15:41:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-09-12 15:41:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-09-12 15:41:16,226 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 59 [2024-09-12 15:41:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:16,226 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-09-12 15:41:16,226 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:16,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-09-12 15:41:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:41:16,227 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:16,227 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 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 15:41:16,239 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:16,427 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:16,427 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:16,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1512704896, now seen corresponding path program 28 times [2024-09-12 15:41:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:16,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391276705] [2024-09-12 15:41:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:16,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:16,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:16,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:41:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:17,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:17,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391276705] [2024-09-12 15:41:17,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391276705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:17,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360518745] [2024-09-12 15:41:17,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:41:17,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:17,064 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:17,065 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-12 15:41:17,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:41:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:17,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 15:41:17,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:17,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:19,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360518745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:19,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:19,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-12 15:41:19,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333086618] [2024-09-12 15:41:19,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:19,213 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-12 15:41:19,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-12 15:41:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-12 15:41:19,215 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:20,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:20,182 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2024-09-12 15:41:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-12 15:41:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-12 15:41:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:20,183 INFO L225 Difference]: With dead ends: 81 [2024-09-12 15:41:20,183 INFO L226 Difference]: Without dead ends: 69 [2024-09-12 15:41:20,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10137 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-12 15:41:20,185 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:20,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 37 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:41:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-12 15:41:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-12 15:41:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 59 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-09-12 15:41:20,202 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 59 [2024-09-12 15:41:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:20,202 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-09-12 15:41:20,202 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:20,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-09-12 15:41:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:20,203 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:20,203 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 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 15:41:20,216 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-12 15:41:20,403 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:20,404 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:20,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:20,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1324073462, now seen corresponding path program 29 times [2024-09-12 15:41:20,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:20,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363966965] [2024-09-12 15:41:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:20,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:20,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:20,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:21,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363966965] [2024-09-12 15:41:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363966965] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942570164] [2024-09-12 15:41:21,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:41:21,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:21,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:21,036 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:21,037 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-12 15:41:21,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-12 15:41:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:21,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-12 15:41:21,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:22,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942570164] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:23,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-12 15:41:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126847317] [2024-09-12 15:41:23,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:23,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-12 15:41:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-12 15:41:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-12 15:41:23,541 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:24,703 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-09-12 15:41:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 15:41:24,704 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-12 15:41:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:24,705 INFO L225 Difference]: With dead ends: 87 [2024-09-12 15:41:24,705 INFO L226 Difference]: Without dead ends: 76 [2024-09-12 15:41:24,707 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11296 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-12 15:41:24,707 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:24,707 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-12 15:41:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2024-09-12 15:41:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2024-09-12 15:41:24,729 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 60 [2024-09-12 15:41:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:24,729 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2024-09-12 15:41:24,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:24,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2024-09-12 15:41:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:24,729 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:24,730 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 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 15:41:24,742 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:24,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:24,930 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:24,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash 46852166, now seen corresponding path program 29 times [2024-09-12 15:41:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:24,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776963157] [2024-09-12 15:41:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:25,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:25,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:25,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776963157] [2024-09-12 15:41:25,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776963157] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713462842] [2024-09-12 15:41:25,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:41:25,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:25,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:25,664 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:25,665 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-12 15:41:25,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-12 15:41:25,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:25,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-12 15:41:25,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:26,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:28,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713462842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:28,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:28,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-12 15:41:28,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033094620] [2024-09-12 15:41:28,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:28,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-12 15:41:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:28,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-12 15:41:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-12 15:41:28,027 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:29,109 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2024-09-12 15:41:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 15:41:29,109 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-12 15:41:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:29,110 INFO L225 Difference]: With dead ends: 82 [2024-09-12 15:41:29,110 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 15:41:29,112 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11365 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-12 15:41:29,112 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:29,112 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 49 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 15:41:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-12 15:41:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.098360655737705) internal successors, (67), 63 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2024-09-12 15:41:29,132 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 60 [2024-09-12 15:41:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:29,132 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2024-09-12 15:41:29,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:29,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2024-09-12 15:41:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-12 15:41:29,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:29,133 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 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 15:41:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:29,333 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-09-12 15:41:29,334 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:29,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash -222444796, now seen corresponding path program 30 times [2024-09-12 15:41:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045863782] [2024-09-12 15:41:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:29,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:29,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:29,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:41:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:30,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:30,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045863782] [2024-09-12 15:41:30,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045863782] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:30,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487399747] [2024-09-12 15:41:30,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:41:30,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:30,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:30,063 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:30,063 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-12 15:41:30,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-12 15:41:30,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:30,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 15:41:30,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:30,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:32,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487399747] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:32,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:32,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-12 15:41:32,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778944360] [2024-09-12 15:41:32,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:32,286 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-12 15:41:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-12 15:41:32,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-12 15:41:32,288 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:33,453 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2024-09-12 15:41:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 15:41:33,453 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-12 15:41:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:33,454 INFO L225 Difference]: With dead ends: 89 [2024-09-12 15:41:33,454 INFO L226 Difference]: Without dead ends: 79 [2024-09-12 15:41:33,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11253 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-12 15:41:33,456 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:33,456 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 58 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-12 15:41:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2024-09-12 15:41:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 62 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2024-09-12 15:41:33,476 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2024-09-12 15:41:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:33,477 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2024-09-12 15:41:33,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:33,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2024-09-12 15:41:33,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-12 15:41:33,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:33,478 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 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 15:41:33,496 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:33,678 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:33,679 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:33,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2087519675, now seen corresponding path program 30 times [2024-09-12 15:41:33,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:33,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005738121] [2024-09-12 15:41:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:33,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:33,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:33,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:34,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:34,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:34,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005738121] [2024-09-12 15:41:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005738121] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447369698] [2024-09-12 15:41:34,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:41:34,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:34,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:34,339 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:34,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-12 15:41:34,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-12 15:41:34,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:34,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 15:41:34,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:35,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:36,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447369698] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:36,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:36,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-12 15:41:36,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729297371] [2024-09-12 15:41:36,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:36,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-12 15:41:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-12 15:41:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-12 15:41:36,722 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:37,904 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2024-09-12 15:41:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 15:41:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-12 15:41:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:37,905 INFO L225 Difference]: With dead ends: 83 [2024-09-12 15:41:37,905 INFO L226 Difference]: Without dead ends: 71 [2024-09-12 15:41:37,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11248 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-12 15:41:37,908 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:37,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:37,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-12 15:41:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-12 15:41:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 61 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2024-09-12 15:41:37,948 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 61 [2024-09-12 15:41:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:37,948 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2024-09-12 15:41:37,948 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:37,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2024-09-12 15:41:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-12 15:41:37,949 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:37,949 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 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 15:41:37,965 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:38,150 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:38,150 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:38,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:38,150 INFO L85 PathProgramCache]: Analyzing trace with hash -892633471, now seen corresponding path program 31 times [2024-09-12 15:41:38,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:38,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609804213] [2024-09-12 15:41:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:38,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:38,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:38,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:38,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:41:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:38,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:38,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609804213] [2024-09-12 15:41:38,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609804213] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:38,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511410661] [2024-09-12 15:41:38,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:41:38,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:38,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:38,839 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:38,840 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-12 15:41:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:39,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 15:41:39,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:39,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:41,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511410661] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:41,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:41,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-12 15:41:41,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142060716] [2024-09-12 15:41:41,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:41,515 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-12 15:41:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:41,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-12 15:41:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-12 15:41:41,517 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:42,776 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2024-09-12 15:41:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-12 15:41:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-12 15:41:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:42,777 INFO L225 Difference]: With dead ends: 89 [2024-09-12 15:41:42,777 INFO L226 Difference]: Without dead ends: 78 [2024-09-12 15:41:42,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12561 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-12 15:41:42,779 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:42,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:41:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-12 15:41:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-09-12 15:41:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2024-09-12 15:41:42,807 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 62 [2024-09-12 15:41:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:42,807 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2024-09-12 15:41:42,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:42,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2024-09-12 15:41:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-12 15:41:42,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:42,808 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 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 15:41:42,826 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-09-12 15:41:43,009 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-12 15:41:43,009 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:43,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1878269953, now seen corresponding path program 31 times [2024-09-12 15:41:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:43,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004869539] [2024-09-12 15:41:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:41:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:43,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:43,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004869539] [2024-09-12 15:41:43,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004869539] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:43,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633346058] [2024-09-12 15:41:43,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:41:43,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:43,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:43,846 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:43,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-12 15:41:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:44,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 15:41:44,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:44,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633346058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:46,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-12 15:41:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027864882] [2024-09-12 15:41:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:46,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-12 15:41:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-12 15:41:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-12 15:41:46,381 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:47,557 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2024-09-12 15:41:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-12 15:41:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-12 15:41:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:47,558 INFO L225 Difference]: With dead ends: 84 [2024-09-12 15:41:47,558 INFO L226 Difference]: Without dead ends: 75 [2024-09-12 15:41:47,559 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12597 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-12 15:41:47,560 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:47,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-12 15:41:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-12 15:41:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2024-09-12 15:41:47,587 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 62 [2024-09-12 15:41:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:47,587 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2024-09-12 15:41:47,587 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:47,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2024-09-12 15:41:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-12 15:41:47,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:47,588 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 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 15:41:47,601 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:47,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:47,789 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:47,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1210559739, now seen corresponding path program 32 times [2024-09-12 15:41:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:47,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106184178] [2024-09-12 15:41:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:47,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:47,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:47,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:48,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:41:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:48,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:48,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106184178] [2024-09-12 15:41:48,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106184178] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:48,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209563091] [2024-09-12 15:41:48,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:41:48,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:48,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:48,561 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:48,561 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-12 15:41:48,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:41:48,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:48,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-12 15:41:48,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:49,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:50,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209563091] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:50,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:50,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-12 15:41:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759803337] [2024-09-12 15:41:50,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:50,931 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-12 15:41:50,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-12 15:41:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-12 15:41:50,932 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:52,092 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2024-09-12 15:41:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-12 15:41:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-12 15:41:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:52,093 INFO L225 Difference]: With dead ends: 91 [2024-09-12 15:41:52,093 INFO L226 Difference]: Without dead ends: 81 [2024-09-12 15:41:52,094 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12515 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-12 15:41:52,094 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:52,095 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 55 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-12 15:41:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-09-12 15:41:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-09-12 15:41:52,116 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2024-09-12 15:41:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:52,116 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-09-12 15:41:52,116 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:52,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-09-12 15:41:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-12 15:41:52,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:52,116 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 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 15:41:52,129 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:52,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:52,317 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:52,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:52,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1268071072, now seen corresponding path program 32 times [2024-09-12 15:41:52,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:52,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688123338] [2024-09-12 15:41:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:52,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:52,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:52,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:52,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:41:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:52,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688123338] [2024-09-12 15:41:52,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688123338] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160275031] [2024-09-12 15:41:52,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:41:52,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:52,970 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:52,971 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-12 15:41:53,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:41:53,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:53,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-12 15:41:53,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:53,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:55,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160275031] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:55,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:55,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-12 15:41:55,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642091742] [2024-09-12 15:41:55,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:55,451 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-12 15:41:55,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:55,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-12 15:41:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-12 15:41:55,453 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:56,484 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2024-09-12 15:41:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-12 15:41:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-12 15:41:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:56,485 INFO L225 Difference]: With dead ends: 85 [2024-09-12 15:41:56,485 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 15:41:56,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12510 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-12 15:41:56,488 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:56,488 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 31 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:41:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 15:41:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-12 15:41:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:41:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-09-12 15:41:56,508 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 63 [2024-09-12 15:41:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:56,508 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-09-12 15:41:56,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:56,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-09-12 15:41:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:41:56,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:56,509 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 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 15:41:56,522 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-12 15:41:56,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:56,709 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:56,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash 580834154, now seen corresponding path program 33 times [2024-09-12 15:41:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879048231] [2024-09-12 15:41:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:56,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:56,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:57,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:41:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:57,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:57,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879048231] [2024-09-12 15:41:57,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879048231] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:57,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612525876] [2024-09-12 15:41:57,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:41:57,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:57,512 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:57,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-12 15:41:57,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 15:41:57,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:57,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-12 15:41:57,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:41:58,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:00,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612525876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:00,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:00,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-12 15:42:00,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12242078] [2024-09-12 15:42:00,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:00,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-12 15:42:00,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:00,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-12 15:42:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-12 15:42:00,325 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:01,493 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-09-12 15:42:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 15:42:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-12 15:42:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:01,495 INFO L225 Difference]: With dead ends: 91 [2024-09-12 15:42:01,495 INFO L226 Difference]: Without dead ends: 80 [2024-09-12 15:42:01,497 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13893 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-12 15:42:01,497 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:01,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:42:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-12 15:42:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2024-09-12 15:42:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2024-09-12 15:42:01,522 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 64 [2024-09-12 15:42:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:01,522 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2024-09-12 15:42:01,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:01,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2024-09-12 15:42:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:42:01,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:01,523 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 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 15:42:01,542 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:01,724 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:01,724 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:01,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -493591002, now seen corresponding path program 33 times [2024-09-12 15:42:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:01,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323240538] [2024-09-12 15:42:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:01,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:01,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:02,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:42:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323240538] [2024-09-12 15:42:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323240538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70446774] [2024-09-12 15:42:02,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:42:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:02,587 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:02,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-12 15:42:02,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 15:42:02,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:02,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-12 15:42:02,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:03,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:05,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70446774] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:05,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:05,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-12 15:42:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559746574] [2024-09-12 15:42:05,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:05,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-12 15:42:05,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-12 15:42:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-12 15:42:05,292 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:06,595 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-09-12 15:42:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 15:42:06,596 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-12 15:42:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:06,596 INFO L225 Difference]: With dead ends: 86 [2024-09-12 15:42:06,597 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 15:42:06,598 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13931 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-12 15:42:06,598 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:06,598 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 70 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:42:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 15:42:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-12 15:42:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 67 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2024-09-12 15:42:06,620 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 64 [2024-09-12 15:42:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:06,620 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2024-09-12 15:42:06,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:06,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2024-09-12 15:42:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 15:42:06,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:06,621 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 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 15:42:06,633 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-09-12 15:42:06,821 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:06,822 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:06,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1180087452, now seen corresponding path program 34 times [2024-09-12 15:42:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645199438] [2024-09-12 15:42:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:06,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:06,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:07,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:42:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:07,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645199438] [2024-09-12 15:42:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645199438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260524834] [2024-09-12 15:42:07,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:42:07,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:07,653 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:07,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-12 15:42:07,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:42:07,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:07,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 15:42:07,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:08,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260524834] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:10,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-12 15:42:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957122065] [2024-09-12 15:42:10,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:10,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-12 15:42:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-12 15:42:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-12 15:42:10,340 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:11,570 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2024-09-12 15:42:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 15:42:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-12 15:42:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:11,571 INFO L225 Difference]: With dead ends: 93 [2024-09-12 15:42:11,571 INFO L226 Difference]: Without dead ends: 83 [2024-09-12 15:42:11,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13844 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-12 15:42:11,573 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:11,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 52 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:42:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-12 15:42:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2024-09-12 15:42:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.078125) internal successors, (69), 66 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-09-12 15:42:11,606 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 65 [2024-09-12 15:42:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:11,606 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-09-12 15:42:11,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:11,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-09-12 15:42:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 15:42:11,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:11,608 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 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 15:42:11,625 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:11,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:11,809 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:11,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1781316645, now seen corresponding path program 34 times [2024-09-12 15:42:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:11,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695673137] [2024-09-12 15:42:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:11,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:11,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:11,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:12,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:42:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:12,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695673137] [2024-09-12 15:42:12,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695673137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325390925] [2024-09-12 15:42:12,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:42:12,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:12,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:12,511 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:12,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-12 15:42:12,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:42:12,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:12,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 15:42:12,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:13,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:15,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325390925] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:15,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:15,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-12 15:42:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324388600] [2024-09-12 15:42:15,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:15,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-12 15:42:15,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-12 15:42:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-12 15:42:15,224 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:16,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:16,398 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2024-09-12 15:42:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-12 15:42:16,399 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-12 15:42:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:16,400 INFO L225 Difference]: With dead ends: 87 [2024-09-12 15:42:16,400 INFO L226 Difference]: Without dead ends: 75 [2024-09-12 15:42:16,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13839 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-12 15:42:16,403 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:16,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 49 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:42:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-12 15:42:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-12 15:42:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2024-09-12 15:42:16,436 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 65 [2024-09-12 15:42:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:16,436 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2024-09-12 15:42:16,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:16,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2024-09-12 15:42:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-12 15:42:16,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:16,436 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 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 15:42:16,449 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:16,637 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:16,637 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:16,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -514784735, now seen corresponding path program 35 times [2024-09-12 15:42:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:16,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360811107] [2024-09-12 15:42:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:16,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:16,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:17,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:42:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:17,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360811107] [2024-09-12 15:42:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360811107] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:17,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256548336] [2024-09-12 15:42:17,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:42:17,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:17,381 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:17,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-12 15:42:17,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-12 15:42:17,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:17,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 15:42:17,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:18,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:20,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256548336] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:20,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:20,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-12 15:42:20,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347404289] [2024-09-12 15:42:20,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:20,405 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-12 15:42:20,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-12 15:42:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-12 15:42:20,407 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:21,867 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-09-12 15:42:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-12 15:42:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-12 15:42:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:21,869 INFO L225 Difference]: With dead ends: 93 [2024-09-12 15:42:21,869 INFO L226 Difference]: Without dead ends: 82 [2024-09-12 15:42:21,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15394 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-12 15:42:21,871 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:21,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:42:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-12 15:42:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-09-12 15:42:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2024-09-12 15:42:21,893 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 66 [2024-09-12 15:42:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:21,893 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2024-09-12 15:42:21,893 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:21,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2024-09-12 15:42:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-12 15:42:21,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:21,893 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 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 15:42:21,905 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-09-12 15:42:22,094 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:22,094 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:22,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash -535311583, now seen corresponding path program 35 times [2024-09-12 15:42:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:22,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684648840] [2024-09-12 15:42:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:22,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:22,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:22,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:42:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:22,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:22,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684648840] [2024-09-12 15:42:22,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684648840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:22,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556509086] [2024-09-12 15:42:22,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:42:22,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:22,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:22,981 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:22,982 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-12 15:42:23,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-12 15:42:23,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:23,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 15:42:23,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:24,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:25,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556509086] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:25,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:25,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-12 15:42:25,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540360344] [2024-09-12 15:42:25,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:25,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-12 15:42:25,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-12 15:42:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-12 15:42:25,841 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:27,237 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-09-12 15:42:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-12 15:42:27,237 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-12 15:42:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:27,238 INFO L225 Difference]: With dead ends: 88 [2024-09-12 15:42:27,238 INFO L226 Difference]: Without dead ends: 79 [2024-09-12 15:42:27,240 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15332 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-12 15:42:27,240 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:27,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 82 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:42:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-12 15:42:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-09-12 15:42:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 69 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-09-12 15:42:27,265 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 66 [2024-09-12 15:42:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:27,265 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-09-12 15:42:27,265 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:27,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-09-12 15:42:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-12 15:42:27,266 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:27,266 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 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 15:42:27,283 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:27,467 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:27,467 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:27,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash -543333477, now seen corresponding path program 36 times [2024-09-12 15:42:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703234366] [2024-09-12 15:42:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:27,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:27,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:27,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:42:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:28,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703234366] [2024-09-12 15:42:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703234366] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950437307] [2024-09-12 15:42:28,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:42:28,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:28,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:28,364 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:28,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-12 15:42:28,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-12 15:42:28,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:28,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-12 15:42:28,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:29,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950437307] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:31,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:31,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-12 15:42:31,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492251756] [2024-09-12 15:42:31,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:31,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-12 15:42:31,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-12 15:42:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-12 15:42:31,122 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:32,382 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2024-09-12 15:42:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-12 15:42:32,383 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-12 15:42:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:32,384 INFO L225 Difference]: With dead ends: 95 [2024-09-12 15:42:32,384 INFO L226 Difference]: Without dead ends: 85 [2024-09-12 15:42:32,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15240 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-12 15:42:32,387 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:32,388 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:42:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-12 15:42:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-09-12 15:42:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 68 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-09-12 15:42:32,437 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2024-09-12 15:42:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:32,438 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-09-12 15:42:32,438 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:32,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:32,438 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-09-12 15:42:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-12 15:42:32,439 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:32,439 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 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 15:42:32,457 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:32,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-12 15:42:32,640 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:32,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1220312640, now seen corresponding path program 36 times [2024-09-12 15:42:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:32,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018148018] [2024-09-12 15:42:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:32,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:32,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:32,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:33,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:42:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:33,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018148018] [2024-09-12 15:42:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018148018] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219166240] [2024-09-12 15:42:33,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:42:33,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:33,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:33,391 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:33,392 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-12 15:42:33,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-12 15:42:33,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:33,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-12 15:42:33,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:34,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:36,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219166240] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:36,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:36,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-12 15:42:36,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674281744] [2024-09-12 15:42:36,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:36,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-12 15:42:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-12 15:42:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-12 15:42:36,296 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:37,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:37,488 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2024-09-12 15:42:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-12 15:42:37,488 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-12 15:42:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:37,489 INFO L225 Difference]: With dead ends: 89 [2024-09-12 15:42:37,489 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 15:42:37,490 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15339 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-12 15:42:37,491 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:37,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 34 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:42:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 15:42:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-12 15:42:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2024-09-12 15:42:37,513 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2024-09-12 15:42:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:37,513 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2024-09-12 15:42:37,513 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:37,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2024-09-12 15:42:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 15:42:37,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:37,513 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 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 15:42:37,526 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:37,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:37,714 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:37,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2044719306, now seen corresponding path program 37 times [2024-09-12 15:42:37,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:37,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163498814] [2024-09-12 15:42:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:37,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:37,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:37,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:38,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:42:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:38,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163498814] [2024-09-12 15:42:38,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163498814] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591147046] [2024-09-12 15:42:38,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:42:38,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:38,534 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:38,535 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-12 15:42:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:38,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-12 15:42:38,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:39,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591147046] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:41,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2024-09-12 15:42:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384294141] [2024-09-12 15:42:41,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:41,771 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-12 15:42:41,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-12 15:42:41,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2024-09-12 15:42:41,774 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:43,358 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-09-12 15:42:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-12 15:42:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2024-09-12 15:42:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:43,359 INFO L225 Difference]: With dead ends: 95 [2024-09-12 15:42:43,359 INFO L226 Difference]: Without dead ends: 84 [2024-09-12 15:42:43,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16758 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5473, Invalid=30437, Unknown=0, NotChecked=0, Total=35910 [2024-09-12 15:42:43,362 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:43,362 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 73 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:42:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-12 15:42:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2024-09-12 15:42:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-12 15:42:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2024-09-12 15:42:43,391 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 68 [2024-09-12 15:42:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:43,391 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2024-09-12 15:42:43,392 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:42:43,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2024-09-12 15:42:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 15:42:43,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:43,392 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 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 15:42:43,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-09-12 15:42:43,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:43,593 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:43,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:43,593 INFO L85 PathProgramCache]: Analyzing trace with hash 335301638, now seen corresponding path program 37 times [2024-09-12 15:42:43,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:43,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134385310] [2024-09-12 15:42:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:43,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:43,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:42:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:44,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:42:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:44,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:44,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134385310] [2024-09-12 15:42:44,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134385310] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:44,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70882742] [2024-09-12 15:42:44,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:42:44,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:44,546 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:42:44,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-12 15:42:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:44,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-12 15:42:44,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:42:45,813 INFO L327 TraceCheckSpWp]: Computing backward predicates...