./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de20.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 cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:06:25,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:06:25,360 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:06:25,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:06:25,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:06:25,439 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:06:25,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:06:25,440 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:06:25,441 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:06:25,443 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:06:25,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:06:25,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:06:25,445 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:06:25,445 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:06:25,447 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:06:25,448 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:06:25,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:06:25,448 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:06:25,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:06:25,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:06:25,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:06:25,452 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:06:25,452 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:06:25,453 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:06:25,453 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:06:25,453 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:06:25,454 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:06:25,454 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:06:25,454 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:06:25,455 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:06:25,455 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:06:25,455 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:06:25,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:06:25,456 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:06:25,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:06:25,456 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:06:25,456 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:06:25,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:06:25,457 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:06:25,457 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:06:25,457 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:06:25,460 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:06:25,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:06:25,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:06:25,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:06:25,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:06:25,792 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:06:25,793 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:06:25,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de20.c [2024-09-20 12:06:27,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:06:27,573 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:06:27,575 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de20.c [2024-09-20 12:06:27,586 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/73b0f331f/204d1863453f402eb25889750c943e58/FLAGcceb01c26 [2024-09-20 12:06:27,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/73b0f331f/204d1863453f402eb25889750c943e58 [2024-09-20 12:06:27,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:06:27,606 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:06:27,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:06:27,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:06:27,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:06:27,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750c65cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27, skipping insertion in model container [2024-09-20 12:06:27,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,639 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:06:27,816 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de20.c[368,381] [2024-09-20 12:06:27,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:06:27,861 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:06:27,873 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de20.c[368,381] [2024-09-20 12:06:27,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:06:27,898 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:06:27,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27 WrapperNode [2024-09-20 12:06:27,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:06:27,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:06:27,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:06:27,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:06:27,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,923 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:06:27,924 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:06:27,925 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:06:27,925 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:06:27,925 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:06:27,937 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,939 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,958 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]. [2024-09-20 12:06:27,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,965 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,970 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,976 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:27,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:06:27,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:06:27,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:06:27,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:06:27,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (1/1) ... [2024-09-20 12:06:28,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:06:28,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:28,030 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) [2024-09-20 12:06:28,032 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 [2024-09-20 12:06:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:06:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:06:28,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:06:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:06:28,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:06:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:06:28,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:06:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:06:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:06:28,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:06:28,166 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:06:28,168 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:06:28,344 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:06:28,344 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:06:28,377 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:06:28,378 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:06:28,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:06:28 BoogieIcfgContainer [2024-09-20 12:06:28,379 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:06:28,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:06:28,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:06:28,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:06:28,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:06:27" (1/3) ... [2024-09-20 12:06:28,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14055477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:06:28, skipping insertion in model container [2024-09-20 12:06:28,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:06:27" (2/3) ... [2024-09-20 12:06:28,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14055477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:06:28, skipping insertion in model container [2024-09-20 12:06:28,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:06:28" (3/3) ... [2024-09-20 12:06:28,394 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de20.c [2024-09-20 12:06:28,409 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:06:28,409 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:06:28,464 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:06:28,472 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;@6c21c81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:06:28,473 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:06:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 12:06:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 12:06:28,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:28,489 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:28,490 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:28,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2046341363, now seen corresponding path program 1 times [2024-09-20 12:06:28,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:28,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600634583] [2024-09-20 12:06:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:28,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:28,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:28,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:28,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600634583] [2024-09-20 12:06:28,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600634583] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:06:28,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:06:28,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:06:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006665216] [2024-09-20 12:06:28,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:06:28,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:06:28,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:06:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:06:28,698 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:28,724 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-09-20 12:06:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:06:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-20 12:06:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:28,734 INFO L225 Difference]: With dead ends: 32 [2024-09-20 12:06:28,735 INFO L226 Difference]: Without dead ends: 13 [2024-09-20 12:06:28,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:06:28,743 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:28,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:06:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-20 12:06:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-20 12:06:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-09-20 12:06:28,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2024-09-20 12:06:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:28,775 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-09-20 12:06:28,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:28,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-09-20 12:06:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 12:06:28,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:28,777 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:28,777 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:06:28,777 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:28,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1301388791, now seen corresponding path program 1 times [2024-09-20 12:06:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:28,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946358041] [2024-09-20 12:06:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:28,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:29,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:29,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:29,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946358041] [2024-09-20 12:06:29,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946358041] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:06:29,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:06:29,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:06:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114011313] [2024-09-20 12:06:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:06:29,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:06:29,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:06:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:06:29,206 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:29,269 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-09-20 12:06:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:06:29,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-20 12:06:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:29,270 INFO L225 Difference]: With dead ends: 21 [2024-09-20 12:06:29,270 INFO L226 Difference]: Without dead ends: 16 [2024-09-20 12:06:29,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:06:29,272 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:29,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:06:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-20 12:06:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-20 12:06:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-20 12:06:29,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2024-09-20 12:06:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:29,281 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-20 12:06:29,281 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-20 12:06:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 12:06:29,282 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:29,282 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:29,283 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:06:29,283 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:29,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1652809100, now seen corresponding path program 1 times [2024-09-20 12:06:29,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:29,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359276754] [2024-09-20 12:06:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:29,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:29,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359276754] [2024-09-20 12:06:29,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359276754] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:06:29,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:06:29,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 12:06:29,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827738034] [2024-09-20 12:06:29,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:06:29,386 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 12:06:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 12:06:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:06:29,387 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:29,458 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-20 12:06:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 12:06:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 12:06:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:29,464 INFO L225 Difference]: With dead ends: 22 [2024-09-20 12:06:29,464 INFO L226 Difference]: Without dead ends: 14 [2024-09-20 12:06:29,465 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:06:29,466 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:29,466 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-20 12:06:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-20 12:06:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-20 12:06:29,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2024-09-20 12:06:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:29,471 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-20 12:06:29,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-20 12:06:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 12:06:29,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:29,473 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:29,473 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:06:29,473 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:29,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash 545094421, now seen corresponding path program 1 times [2024-09-20 12:06:29,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:29,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501486035] [2024-09-20 12:06:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:29,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:29,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:29,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501486035] [2024-09-20 12:06:29,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501486035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099722167] [2024-09-20 12:06:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:29,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:29,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:29,639 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) [2024-09-20 12:06:29,644 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:06:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:29,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:06:29,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:29,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:29,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099722167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:29,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:29,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-20 12:06:29,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793386332] [2024-09-20 12:06:29,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:29,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:06:29,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:06:29,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:06:29,841 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:29,919 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-09-20 12:06:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:06:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 12:06:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:29,922 INFO L225 Difference]: With dead ends: 27 [2024-09-20 12:06:29,922 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 12:06:29,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:06:29,927 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:29,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 12:06:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-09-20 12:06:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-09-20 12:06:29,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2024-09-20 12:06:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:29,939 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-09-20 12:06:29,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:29,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-09-20 12:06:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 12:06:29,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:29,941 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:29,959 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:06:30,141 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 [2024-09-20 12:06:30,142 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:30,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:30,143 INFO L85 PathProgramCache]: Analyzing trace with hash -246404376, now seen corresponding path program 1 times [2024-09-20 12:06:30,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:30,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358876847] [2024-09-20 12:06:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:30,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:30,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358876847] [2024-09-20 12:06:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358876847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471027980] [2024-09-20 12:06:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:30,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:30,477 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) [2024-09-20 12:06:30,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:06:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:30,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:06:30,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:30,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471027980] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:30,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:30,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-20 12:06:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787272212] [2024-09-20 12:06:30,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:30,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:06:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:06:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:06:30,701 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:30,774 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-20 12:06:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:06:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 12:06:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:30,777 INFO L225 Difference]: With dead ends: 27 [2024-09-20 12:06:30,777 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 12:06:30,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-20 12:06:30,778 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:30,781 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 12:06:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-09-20 12:06:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-09-20 12:06:30,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2024-09-20 12:06:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:30,791 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-09-20 12:06:30,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:30,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-09-20 12:06:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 12:06:30,794 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:30,794 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:30,814 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:30,994 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 [2024-09-20 12:06:30,995 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:30,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 986936693, now seen corresponding path program 2 times [2024-09-20 12:06:30,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:30,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026833240] [2024-09-20 12:06:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:30,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:31,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:31,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:31,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026833240] [2024-09-20 12:06:31,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026833240] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:31,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596023848] [2024-09-20 12:06:31,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:06:31,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:31,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:31,107 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) [2024-09-20 12:06:31,108 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:06:31,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:06:31,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:31,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:06:31,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:31,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596023848] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:31,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:31,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-20 12:06:31,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496031735] [2024-09-20 12:06:31,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:31,339 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 12:06:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 12:06:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-20 12:06:31,340 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:31,411 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-09-20 12:06:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 12:06:31,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-20 12:06:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:31,413 INFO L225 Difference]: With dead ends: 32 [2024-09-20 12:06:31,413 INFO L226 Difference]: Without dead ends: 23 [2024-09-20 12:06:31,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-20 12:06:31,416 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:31,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-20 12:06:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-20 12:06:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-09-20 12:06:31,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2024-09-20 12:06:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:31,424 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-09-20 12:06:31,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:31,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-09-20 12:06:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:06:31,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:31,430 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:31,449 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:06:31,631 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 12:06:31,631 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:31,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -372821783, now seen corresponding path program 3 times [2024-09-20 12:06:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547869096] [2024-09-20 12:06:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:31,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:31,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547869096] [2024-09-20 12:06:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547869096] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901963663] [2024-09-20 12:06:31,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:06:31,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:31,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:31,879 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) [2024-09-20 12:06:31,881 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:06:31,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 12:06:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:31,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 12:06:31,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:31,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:32,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901963663] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:32,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:32,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-09-20 12:06:32,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654815794] [2024-09-20 12:06:32,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:32,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 12:06:32,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:32,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 12:06:32,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:06:32,073 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:32,162 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-09-20 12:06:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:06:32,162 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-20 12:06:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:32,163 INFO L225 Difference]: With dead ends: 30 [2024-09-20 12:06:32,163 INFO L226 Difference]: Without dead ends: 25 [2024-09-20 12:06:32,164 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-09-20 12:06:32,165 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:32,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-20 12:06:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-20 12:06:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-09-20 12:06:32,172 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2024-09-20 12:06:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:32,172 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-09-20 12:06:32,172 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-09-20 12:06:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:06:32,173 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:32,173 INFO L216 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:32,192 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:06:32,374 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:32,374 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:32,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash -957289368, now seen corresponding path program 4 times [2024-09-20 12:06:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:32,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732626832] [2024-09-20 12:06:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:32,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:32,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:32,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732626832] [2024-09-20 12:06:32,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732626832] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:32,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110325143] [2024-09-20 12:06:32,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:06:32,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:32,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:32,497 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) [2024-09-20 12:06:32,500 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:06:32,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:06:32,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:32,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 12:06:32,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:32,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:32,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110325143] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:32,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:32,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-20 12:06:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169100675] [2024-09-20 12:06:32,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:32,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:06:32,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:06:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:06:32,677 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:32,870 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-20 12:06:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 12:06:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-20 12:06:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:32,871 INFO L225 Difference]: With dead ends: 41 [2024-09-20 12:06:32,871 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 12:06:32,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:06:32,873 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:32,873 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 12:06:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2024-09-20 12:06:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-09-20 12:06:32,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2024-09-20 12:06:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:32,888 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-09-20 12:06:32,888 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:32,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-09-20 12:06:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 12:06:32,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:32,889 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:32,908 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:06:33,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-20 12:06:33,094 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:33,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1362964372, now seen corresponding path program 5 times [2024-09-20 12:06:33,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:33,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170907937] [2024-09-20 12:06:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:33,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:33,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:33,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170907937] [2024-09-20 12:06:33,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170907937] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:33,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344894716] [2024-09-20 12:06:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:06:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:33,238 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) [2024-09-20 12:06:33,240 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:06:33,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 12:06:33,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:33,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:06:33,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:33,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344894716] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:33,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:33,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2024-09-20 12:06:33,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047400766] [2024-09-20 12:06:33,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:33,497 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 12:06:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 12:06:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-20 12:06:33,498 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:33,705 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-09-20 12:06:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:06:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-20 12:06:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:33,706 INFO L225 Difference]: With dead ends: 49 [2024-09-20 12:06:33,706 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 12:06:33,707 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:06:33,708 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:33,708 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 12:06:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-09-20 12:06:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-20 12:06:33,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 17 [2024-09-20 12:06:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:33,722 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-20 12:06:33,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:33,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-20 12:06:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 12:06:33,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:33,724 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:33,741 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:33,924 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:33,925 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:33,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash 305126920, now seen corresponding path program 6 times [2024-09-20 12:06:33,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:33,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076375753] [2024-09-20 12:06:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:34,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:34,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076375753] [2024-09-20 12:06:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076375753] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981427217] [2024-09-20 12:06:34,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:06:34,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:34,139 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) [2024-09-20 12:06:34,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:06:34,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-20 12:06:34,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:34,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 12:06:34,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:34,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981427217] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:34,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:34,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-09-20 12:06:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196676684] [2024-09-20 12:06:34,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:34,346 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:06:34,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:06:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:06:34,347 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:34,458 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-09-20 12:06:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:06:34,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-20 12:06:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:34,459 INFO L225 Difference]: With dead ends: 42 [2024-09-20 12:06:34,460 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 12:06:34,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-20 12:06:34,460 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:34,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 12:06:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-09-20 12:06:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-20 12:06:34,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2024-09-20 12:06:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:34,473 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-20 12:06:34,473 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:34,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-20 12:06:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 12:06:34,474 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:34,474 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:34,490 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 12:06:34,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:34,675 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:34,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 904537685, now seen corresponding path program 7 times [2024-09-20 12:06:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281496725] [2024-09-20 12:06:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:34,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:34,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281496725] [2024-09-20 12:06:34,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281496725] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:34,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863873410] [2024-09-20 12:06:34,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:06:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:34,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:34,827 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) [2024-09-20 12:06:34,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:06:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:34,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:06:34,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:34,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:35,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863873410] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:35,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:35,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-09-20 12:06:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065030645] [2024-09-20 12:06:35,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:35,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 12:06:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 12:06:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:06:35,129 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:35,494 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2024-09-20 12:06:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:06:35,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-20 12:06:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:35,496 INFO L225 Difference]: With dead ends: 53 [2024-09-20 12:06:35,496 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 12:06:35,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:06:35,497 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:35,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 12:06:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-09-20 12:06:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-20 12:06:35,510 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 19 [2024-09-20 12:06:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:35,510 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-20 12:06:35,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:35,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-20 12:06:35,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 12:06:35,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:35,512 INFO L216 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:35,531 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:35,715 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:35,716 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:35,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:35,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1748253035, now seen corresponding path program 2 times [2024-09-20 12:06:35,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:35,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383279483] [2024-09-20 12:06:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:35,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:35,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:35,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:35,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383279483] [2024-09-20 12:06:35,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383279483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:35,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810887987] [2024-09-20 12:06:35,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:06:35,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:35,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:35,861 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) [2024-09-20 12:06:35,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:06:35,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:06:35,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:35,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:06:35,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:35,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810887987] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:36,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:36,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-20 12:06:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383214840] [2024-09-20 12:06:36,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:36,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:06:36,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:06:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:06:36,122 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:36,632 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2024-09-20 12:06:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:06:36,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-20 12:06:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:36,634 INFO L225 Difference]: With dead ends: 60 [2024-09-20 12:06:36,634 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 12:06:36,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:06:36,636 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:36,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 146 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 12:06:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2024-09-20 12:06:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2024-09-20 12:06:36,671 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 19 [2024-09-20 12:06:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:36,671 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2024-09-20 12:06:36,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:36,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2024-09-20 12:06:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 12:06:36,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:36,673 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:36,693 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 12:06:36,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 12:06:36,877 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:36,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2064971831, now seen corresponding path program 8 times [2024-09-20 12:06:36,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:36,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441532363] [2024-09-20 12:06:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:36,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:37,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441532363] [2024-09-20 12:06:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441532363] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942240496] [2024-09-20 12:06:37,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:06:37,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:37,147 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) [2024-09-20 12:06:37,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:06:37,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:06:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:37,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:06:37,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:37,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:37,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942240496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:37,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:37,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2024-09-20 12:06:37,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821001014] [2024-09-20 12:06:37,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:37,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 12:06:37,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 12:06:37,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:06:37,395 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:37,515 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-09-20 12:06:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:06:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 12:06:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:37,517 INFO L225 Difference]: With dead ends: 56 [2024-09-20 12:06:37,518 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 12:06:37,519 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:06:37,520 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:37,520 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 12:06:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-09-20 12:06:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2024-09-20 12:06:37,538 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 20 [2024-09-20 12:06:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:37,538 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2024-09-20 12:06:37,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:37,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2024-09-20 12:06:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 12:06:37,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:37,540 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:37,558 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 12:06:37,740 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 12:06:37,741 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:37,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2036231191, now seen corresponding path program 9 times [2024-09-20 12:06:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:37,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589367489] [2024-09-20 12:06:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:37,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:37,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:37,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589367489] [2024-09-20 12:06:37,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589367489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:37,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969246492] [2024-09-20 12:06:37,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:06:37,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:37,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:37,872 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) [2024-09-20 12:06:37,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:06:37,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:06:37,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:37,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:06:37,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:37,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:38,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969246492] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:38,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:38,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-09-20 12:06:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835020524] [2024-09-20 12:06:38,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:38,150 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:06:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:06:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:06:38,151 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:38,683 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2024-09-20 12:06:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 12:06:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 12:06:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:38,685 INFO L225 Difference]: With dead ends: 70 [2024-09-20 12:06:38,685 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 12:06:38,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:06:38,686 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:38,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 157 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:06:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 12:06:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2024-09-20 12:06:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2024-09-20 12:06:38,702 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 20 [2024-09-20 12:06:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:38,702 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2024-09-20 12:06:38,702 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:38,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2024-09-20 12:06:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 12:06:38,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:38,704 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:38,723 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:38,904 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 12:06:38,904 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:38,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:38,905 INFO L85 PathProgramCache]: Analyzing trace with hash 445920436, now seen corresponding path program 10 times [2024-09-20 12:06:38,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:38,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154765896] [2024-09-20 12:06:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:38,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:39,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:39,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154765896] [2024-09-20 12:06:39,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154765896] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053835598] [2024-09-20 12:06:39,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:06:39,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:39,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:39,036 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) [2024-09-20 12:06:39,038 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:06:39,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:06:39,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:39,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 12:06:39,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:39,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053835598] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:39,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:39,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-09-20 12:06:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887372496] [2024-09-20 12:06:39,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:39,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 12:06:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 12:06:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-20 12:06:39,353 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:39,968 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2024-09-20 12:06:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-20 12:06:39,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-20 12:06:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:39,969 INFO L225 Difference]: With dead ends: 76 [2024-09-20 12:06:39,969 INFO L226 Difference]: Without dead ends: 64 [2024-09-20 12:06:39,970 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 12:06:39,971 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:39,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:06:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-20 12:06:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-09-20 12:06:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-09-20 12:06:39,987 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 21 [2024-09-20 12:06:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:39,987 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-09-20 12:06:39,987 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:39,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-09-20 12:06:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:06:39,988 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:39,988 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:40,004 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:40,196 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:06:40,197 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:40,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1394439896, now seen corresponding path program 11 times [2024-09-20 12:06:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577589808] [2024-09-20 12:06:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:40,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:40,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:40,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577589808] [2024-09-20 12:06:40,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577589808] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:40,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532306729] [2024-09-20 12:06:40,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:06:40,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:40,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:40,430 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) [2024-09-20 12:06:40,432 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:06:40,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-20 12:06:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:40,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 12:06:40,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:40,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:40,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532306729] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:40,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:40,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2024-09-20 12:06:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582335678] [2024-09-20 12:06:40,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:40,702 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:06:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:06:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:06:40,703 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:40,843 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-09-20 12:06:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 12:06:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 12:06:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:40,844 INFO L225 Difference]: With dead ends: 63 [2024-09-20 12:06:40,844 INFO L226 Difference]: Without dead ends: 58 [2024-09-20 12:06:40,844 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:06:40,845 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:40,845 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-20 12:06:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2024-09-20 12:06:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-09-20 12:06:40,862 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 22 [2024-09-20 12:06:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:40,862 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-09-20 12:06:40,862 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:40,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-09-20 12:06:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 12:06:40,863 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:40,864 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:40,882 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 12:06:41,067 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:06:41,068 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:41,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:41,068 INFO L85 PathProgramCache]: Analyzing trace with hash -242426059, now seen corresponding path program 12 times [2024-09-20 12:06:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:41,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130958964] [2024-09-20 12:06:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:41,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:41,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:41,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130958964] [2024-09-20 12:06:41,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130958964] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:41,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456454309] [2024-09-20 12:06:41,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:06:41,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:41,281 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) [2024-09-20 12:06:41,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 12:06:41,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 12:06:41,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:41,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 12:06:41,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:41,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:41,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456454309] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:41,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:41,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2024-09-20 12:06:41,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447001463] [2024-09-20 12:06:41,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:41,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 12:06:41,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:41,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 12:06:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:06:41,674 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:42,654 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2024-09-20 12:06:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-20 12:06:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-20 12:06:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:42,655 INFO L225 Difference]: With dead ends: 90 [2024-09-20 12:06:42,656 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 12:06:42,657 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 12:06:42,658 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:42,658 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 12:06:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2024-09-20 12:06:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2024-09-20 12:06:42,698 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 23 [2024-09-20 12:06:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:42,698 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2024-09-20 12:06:42,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:42,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2024-09-20 12:06:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 12:06:42,700 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:42,700 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:42,715 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:42,904 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 12:06:42,905 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:42,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:42,905 INFO L85 PathProgramCache]: Analyzing trace with hash 697820841, now seen corresponding path program 13 times [2024-09-20 12:06:42,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:42,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188652417] [2024-09-20 12:06:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:42,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:43,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188652417] [2024-09-20 12:06:43,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188652417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322138891] [2024-09-20 12:06:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:06:43,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:43,167 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) [2024-09-20 12:06:43,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 12:06:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:43,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:06:43,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:43,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:43,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322138891] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:43,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:43,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2024-09-20 12:06:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664710943] [2024-09-20 12:06:43,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:43,468 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:06:43,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:06:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:06:43,469 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:43,629 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-09-20 12:06:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 12:06:43,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-20 12:06:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:43,630 INFO L225 Difference]: With dead ends: 72 [2024-09-20 12:06:43,630 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 12:06:43,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:06:43,631 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:43,631 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 137 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:06:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 12:06:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2024-09-20 12:06:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 54 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2024-09-20 12:06:43,651 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 24 [2024-09-20 12:06:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:43,652 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2024-09-20 12:06:43,652 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:43,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2024-09-20 12:06:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 12:06:43,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:43,653 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:43,665 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 12:06:43,854 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 12:06:43,854 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:43,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash -779828600, now seen corresponding path program 14 times [2024-09-20 12:06:43,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:43,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714444331] [2024-09-20 12:06:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:43,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:44,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:44,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:44,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714444331] [2024-09-20 12:06:44,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714444331] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:44,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873427429] [2024-09-20 12:06:44,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:06:44,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:44,068 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) [2024-09-20 12:06:44,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 12:06:44,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:06:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:44,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:06:44,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:44,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:44,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873427429] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:44,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:44,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2024-09-20 12:06:44,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96587250] [2024-09-20 12:06:44,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:44,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 12:06:44,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 12:06:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2024-09-20 12:06:44,457 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:45,412 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2024-09-20 12:06:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 12:06:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-20 12:06:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:45,414 INFO L225 Difference]: With dead ends: 103 [2024-09-20 12:06:45,414 INFO L226 Difference]: Without dead ends: 98 [2024-09-20 12:06:45,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:06:45,416 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:45,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:06:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-20 12:06:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2024-09-20 12:06:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2024-09-20 12:06:45,441 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 24 [2024-09-20 12:06:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:45,441 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2024-09-20 12:06:45,442 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:45,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2024-09-20 12:06:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:06:45,443 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:45,443 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:45,461 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:45,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:45,648 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:45,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 193147348, now seen corresponding path program 15 times [2024-09-20 12:06:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700828511] [2024-09-20 12:06:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:45,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700828511] [2024-09-20 12:06:45,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700828511] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371840041] [2024-09-20 12:06:45,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:06:45,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:45,874 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) [2024-09-20 12:06:45,876 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 12:06:45,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:06:45,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:45,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 12:06:45,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:45,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371840041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:46,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:46,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 32 [2024-09-20 12:06:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10062366] [2024-09-20 12:06:46,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:46,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 12:06:46,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 12:06:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:06:46,323 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:47,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:47,745 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2024-09-20 12:06:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-20 12:06:47,745 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-20 12:06:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:47,746 INFO L225 Difference]: With dead ends: 111 [2024-09-20 12:06:47,746 INFO L226 Difference]: Without dead ends: 97 [2024-09-20 12:06:47,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=600, Invalid=3306, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 12:06:47,748 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:47,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:06:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-20 12:06:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2024-09-20 12:06:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2024-09-20 12:06:47,776 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 25 [2024-09-20 12:06:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:47,776 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2024-09-20 12:06:47,776 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:47,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2024-09-20 12:06:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 12:06:47,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:47,777 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:47,790 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 12:06:47,978 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:47,978 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:47,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1827286088, now seen corresponding path program 16 times [2024-09-20 12:06:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896225452] [2024-09-20 12:06:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:47,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:48,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896225452] [2024-09-20 12:06:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896225452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560334195] [2024-09-20 12:06:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:06:48,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:48,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:48,678 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) [2024-09-20 12:06:48,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 12:06:48,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:06:48,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:48,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 12:06:48,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:48,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:49,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560334195] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:49,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:49,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 37 [2024-09-20 12:06:49,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669300626] [2024-09-20 12:06:49,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:49,230 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 12:06:49,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:49,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 12:06:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:06:49,231 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:50,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:06:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:50,942 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2024-09-20 12:06:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 12:06:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-20 12:06:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:50,943 INFO L225 Difference]: With dead ends: 81 [2024-09-20 12:06:50,943 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 12:06:50,944 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 12:06:50,944 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:50,944 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 12:06:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 12:06:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2024-09-20 12:06:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2024-09-20 12:06:50,972 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 26 [2024-09-20 12:06:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:50,972 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2024-09-20 12:06:50,973 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 35 states have internal predecessors, (59), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:50,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:50,973 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2024-09-20 12:06:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:06:50,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:50,974 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:50,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 12:06:51,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 12:06:51,174 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:51,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash 846831637, now seen corresponding path program 17 times [2024-09-20 12:06:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:51,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623478004] [2024-09-20 12:06:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:51,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:51,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:51,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623478004] [2024-09-20 12:06:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623478004] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:51,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268766476] [2024-09-20 12:06:51,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:06:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:51,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:51,412 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) [2024-09-20 12:06:51,415 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 12:06:51,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 12:06:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:51,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 12:06:51,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:51,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:51,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268766476] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:51,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:51,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2024-09-20 12:06:51,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042098717] [2024-09-20 12:06:51,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:51,973 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 12:06:51,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 12:06:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 12:06:51,975 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:54,206 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2024-09-20 12:06:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-20 12:06:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-20 12:06:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:54,207 INFO L225 Difference]: With dead ends: 124 [2024-09-20 12:06:54,207 INFO L226 Difference]: Without dead ends: 109 [2024-09-20 12:06:54,209 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=864, Invalid=4836, Unknown=0, NotChecked=0, Total=5700 [2024-09-20 12:06:54,210 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:54,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 195 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:06:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-20 12:06:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2024-09-20 12:06:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-20 12:06:54,247 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 27 [2024-09-20 12:06:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:54,247 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-20 12:06:54,247 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:54,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-20 12:06:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 12:06:54,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:54,249 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:54,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 12:06:54,449 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 12:06:54,449 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:54,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash -703869559, now seen corresponding path program 18 times [2024-09-20 12:06:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:54,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807451526] [2024-09-20 12:06:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:54,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:55,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:55,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807451526] [2024-09-20 12:06:55,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807451526] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:55,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117125103] [2024-09-20 12:06:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:06:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:55,282 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) [2024-09-20 12:06:55,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 12:06:55,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 12:06:55,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:06:55,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 12:06:55,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:55,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:56,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117125103] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:56,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:56,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 13] total 41 [2024-09-20 12:06:56,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9368916] [2024-09-20 12:06:56,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:56,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 12:06:56,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 12:06:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 12:06:56,045 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:06:56,552 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2024-09-20 12:06:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 12:06:56,553 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-20 12:06:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:06:56,554 INFO L225 Difference]: With dead ends: 92 [2024-09-20 12:06:56,557 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 12:06:56,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=1584, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 12:06:56,558 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:06:56,559 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:06:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 12:06:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2024-09-20 12:06:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2024-09-20 12:06:56,598 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2024-09-20 12:06:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:06:56,598 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2024-09-20 12:06:56,598 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:06:56,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2024-09-20 12:06:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 12:06:56,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:06:56,604 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:06:56,622 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 12:06:56,807 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 12:06:56,808 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:06:56,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:06:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash 832785865, now seen corresponding path program 19 times [2024-09-20 12:06:56,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:06:56,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625513379] [2024-09-20 12:06:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:06:56,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:06:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:57,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:06:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:57,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:06:57,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625513379] [2024-09-20 12:06:57,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625513379] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:06:57,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444310067] [2024-09-20 12:06:57,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:06:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:06:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:06:57,083 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) [2024-09-20 12:06:57,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 12:06:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:06:57,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 12:06:57,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:06:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:57,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:06:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:06:57,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444310067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:06:57,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:06:57,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2024-09-20 12:06:57,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025954296] [2024-09-20 12:06:57,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:06:57,628 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 12:06:57,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:06:57,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 12:06:57,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 12:06:57,629 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:00,088 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2024-09-20 12:07:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 12:07:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-20 12:07:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:00,089 INFO L225 Difference]: With dead ends: 146 [2024-09-20 12:07:00,089 INFO L226 Difference]: Without dead ends: 141 [2024-09-20 12:07:00,090 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=691, Invalid=2969, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 12:07:00,091 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:00,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 283 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:07:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-20 12:07:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2024-09-20 12:07:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 113 transitions. [2024-09-20 12:07:00,127 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 113 transitions. Word has length 28 [2024-09-20 12:07:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:00,127 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 113 transitions. [2024-09-20 12:07:00,128 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:00,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 113 transitions. [2024-09-20 12:07:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 12:07:00,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:00,128 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:00,145 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:00,329 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 12:07:00,329 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:00,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -309582092, now seen corresponding path program 20 times [2024-09-20 12:07:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972073984] [2024-09-20 12:07:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:00,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:00,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:00,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972073984] [2024-09-20 12:07:00,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972073984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:00,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308880503] [2024-09-20 12:07:00,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:07:00,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:00,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:00,639 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) [2024-09-20 12:07:00,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 12:07:00,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:07:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:00,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 12:07:00,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:00,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308880503] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:01,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-09-20 12:07:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805674830] [2024-09-20 12:07:01,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:01,389 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 12:07:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 12:07:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 12:07:01,390 INFO L87 Difference]: Start difference. First operand 84 states and 113 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:04,781 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2024-09-20 12:07:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-20 12:07:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-20 12:07:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:04,783 INFO L225 Difference]: With dead ends: 149 [2024-09-20 12:07:04,783 INFO L226 Difference]: Without dead ends: 133 [2024-09-20 12:07:04,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1204, Invalid=6806, Unknown=0, NotChecked=0, Total=8010 [2024-09-20 12:07:04,786 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:04,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 221 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:07:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-20 12:07:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-20 12:07:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 85 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2024-09-20 12:07:04,844 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 29 [2024-09-20 12:07:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:04,845 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2024-09-20 12:07:04,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:04,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2024-09-20 12:07:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 12:07:04,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:04,850 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:04,872 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:05,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 12:07:05,051 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:05,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -179779736, now seen corresponding path program 21 times [2024-09-20 12:07:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691717702] [2024-09-20 12:07:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:05,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691717702] [2024-09-20 12:07:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691717702] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453242322] [2024-09-20 12:07:05,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:07:05,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:05,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:05,911 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) [2024-09-20 12:07:05,912 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 12:07:05,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 12:07:05,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:05,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 12:07:05,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:06,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:06,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453242322] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:06,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:06,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 14] total 45 [2024-09-20 12:07:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923601688] [2024-09-20 12:07:06,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:06,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 12:07:06,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 12:07:06,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 12:07:06,775 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:07,348 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2024-09-20 12:07:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:07:07,349 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-20 12:07:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:07,350 INFO L225 Difference]: With dead ends: 105 [2024-09-20 12:07:07,350 INFO L226 Difference]: Without dead ends: 100 [2024-09-20 12:07:07,350 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=1918, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:07:07,351 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:07,351 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 169 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:07:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-20 12:07:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2024-09-20 12:07:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2024-09-20 12:07:07,406 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 30 [2024-09-20 12:07:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:07,406 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2024-09-20 12:07:07,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 43 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:07,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2024-09-20 12:07:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 12:07:07,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:07,407 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:07,420 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 12:07:07,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 12:07:07,607 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:07,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1242666763, now seen corresponding path program 22 times [2024-09-20 12:07:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527972923] [2024-09-20 12:07:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:07,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:07,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:07,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527972923] [2024-09-20 12:07:07,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527972923] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:07,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8754132] [2024-09-20 12:07:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:07:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:07,943 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) [2024-09-20 12:07:07,944 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 12:07:07,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:07:07,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:07,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 12:07:08,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:08,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8754132] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:08,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:08,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-20 12:07:08,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210930312] [2024-09-20 12:07:08,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:08,817 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 12:07:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 12:07:08,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 12:07:08,819 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:13,230 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2024-09-20 12:07:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-09-20 12:07:13,230 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-20 12:07:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:13,231 INFO L225 Difference]: With dead ends: 164 [2024-09-20 12:07:13,231 INFO L226 Difference]: Without dead ends: 147 [2024-09-20 12:07:13,234 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1633, Invalid=9287, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 12:07:13,234 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:13,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 256 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:07:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-20 12:07:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2024-09-20 12:07:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 97 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2024-09-20 12:07:13,295 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 31 [2024-09-20 12:07:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:13,295 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2024-09-20 12:07:13,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:13,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2024-09-20 12:07:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 12:07:13,296 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:13,296 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:13,309 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:13,497 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 12:07:13,497 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:13,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:13,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1056654231, now seen corresponding path program 23 times [2024-09-20 12:07:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:13,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719901362] [2024-09-20 12:07:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:13,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:14,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:14,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719901362] [2024-09-20 12:07:14,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719901362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241116130] [2024-09-20 12:07:14,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:07:14,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:14,521 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) [2024-09-20 12:07:14,522 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 12:07:14,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 12:07:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:14,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:07:14,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:14,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:15,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241116130] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:15,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:15,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 15] total 49 [2024-09-20 12:07:15,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928892166] [2024-09-20 12:07:15,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:15,522 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-20 12:07:15,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-20 12:07:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 12:07:15,524 INFO L87 Difference]: Start difference. First operand 102 states and 134 transitions. Second operand has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:16,724 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2024-09-20 12:07:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 12:07:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-20 12:07:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:16,726 INFO L225 Difference]: With dead ends: 118 [2024-09-20 12:07:16,726 INFO L226 Difference]: Without dead ends: 113 [2024-09-20 12:07:16,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 12:07:16,728 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:16,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 233 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 12:07:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-20 12:07:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2024-09-20 12:07:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.34375) internal successors, (129), 96 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2024-09-20 12:07:16,793 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 32 [2024-09-20 12:07:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:16,793 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2024-09-20 12:07:16,794 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 47 states have internal predecessors, (77), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:16,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2024-09-20 12:07:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 12:07:16,794 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:16,794 INFO L216 NwaCegarLoop]: trace histogram [15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:16,809 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:16,995 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 12:07:16,995 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:16,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 126816424, now seen corresponding path program 24 times [2024-09-20 12:07:16,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:16,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103980587] [2024-09-20 12:07:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:16,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:17,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:17,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:17,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103980587] [2024-09-20 12:07:17,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103980587] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:17,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241237546] [2024-09-20 12:07:17,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:07:17,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:17,374 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) [2024-09-20 12:07:17,375 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 12:07:17,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-20 12:07:17,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:17,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:07:17,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:17,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:18,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241237546] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:18,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:18,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2024-09-20 12:07:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221883479] [2024-09-20 12:07:18,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:18,208 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 12:07:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 12:07:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1773, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 12:07:18,209 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:22,973 INFO L93 Difference]: Finished difference Result 197 states and 265 transitions. [2024-09-20 12:07:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-20 12:07:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-20 12:07:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:22,974 INFO L225 Difference]: With dead ends: 197 [2024-09-20 12:07:22,974 INFO L226 Difference]: Without dead ends: 192 [2024-09-20 12:07:22,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1059, Invalid=4793, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 12:07:22,976 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:22,976 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 364 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:07:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-20 12:07:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 108. [2024-09-20 12:07:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2024-09-20 12:07:23,040 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 32 [2024-09-20 12:07:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:23,040 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2024-09-20 12:07:23,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:23,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2024-09-20 12:07:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:07:23,041 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:23,041 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:23,054 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-20 12:07:23,241 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:23,242 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:23,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1638994964, now seen corresponding path program 25 times [2024-09-20 12:07:23,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:23,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110059899] [2024-09-20 12:07:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:23,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:23,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110059899] [2024-09-20 12:07:23,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110059899] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992185468] [2024-09-20 12:07:23,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:07:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:23,597 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) [2024-09-20 12:07:23,598 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 12:07:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:23,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 12:07:23,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:23,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992185468] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:24,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:24,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-09-20 12:07:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686030098] [2024-09-20 12:07:24,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:24,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 12:07:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 12:07:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 12:07:24,384 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:30,136 INFO L93 Difference]: Finished difference Result 192 states and 251 transitions. [2024-09-20 12:07:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-20 12:07:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-20 12:07:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:30,138 INFO L225 Difference]: With dead ends: 192 [2024-09-20 12:07:30,138 INFO L226 Difference]: Without dead ends: 174 [2024-09-20 12:07:30,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2165, Invalid=12355, Unknown=0, NotChecked=0, Total=14520 [2024-09-20 12:07:30,140 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:30,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 241 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:07:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-20 12:07:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 115. [2024-09-20 12:07:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 110 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 152 transitions. [2024-09-20 12:07:30,230 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 152 transitions. Word has length 33 [2024-09-20 12:07:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:30,230 INFO L474 AbstractCegarLoop]: Abstraction has 115 states and 152 transitions. [2024-09-20 12:07:30,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:30,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 152 transitions. [2024-09-20 12:07:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:07:30,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:30,231 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:30,244 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:30,432 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:30,432 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:30,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash 8411784, now seen corresponding path program 26 times [2024-09-20 12:07:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:30,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837287655] [2024-09-20 12:07:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:30,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:31,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:31,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:31,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837287655] [2024-09-20 12:07:31,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837287655] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:31,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808719716] [2024-09-20 12:07:31,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:07:31,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:31,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:31,544 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) [2024-09-20 12:07:31,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 12:07:31,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:07:31,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:31,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 12:07:31,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:31,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:32,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808719716] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:32,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:32,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2024-09-20 12:07:32,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236348095] [2024-09-20 12:07:32,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:32,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-20 12:07:32,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-20 12:07:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2582, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 12:07:32,690 INFO L87 Difference]: Start difference. First operand 115 states and 152 transitions. Second operand has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:33,423 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2024-09-20 12:07:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 12:07:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-20 12:07:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:33,424 INFO L225 Difference]: With dead ends: 132 [2024-09-20 12:07:33,424 INFO L226 Difference]: Without dead ends: 127 [2024-09-20 12:07:33,425 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=180, Invalid=2682, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 12:07:33,425 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:33,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 225 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:07:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-20 12:07:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2024-09-20 12:07:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.348623853211009) internal successors, (147), 109 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2024-09-20 12:07:33,520 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 34 [2024-09-20 12:07:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:33,521 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2024-09-20 12:07:33,521 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 51 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:33,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2024-09-20 12:07:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 12:07:33,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:33,521 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:33,535 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:33,722 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:33,723 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:33,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash 296303061, now seen corresponding path program 27 times [2024-09-20 12:07:33,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:33,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515792205] [2024-09-20 12:07:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:33,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:34,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:34,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:34,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515792205] [2024-09-20 12:07:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515792205] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:34,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358102616] [2024-09-20 12:07:34,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:07:34,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:34,166 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) [2024-09-20 12:07:34,169 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 12:07:34,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 12:07:34,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:34,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 12:07:34,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:34,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:35,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358102616] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:35,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:35,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 52 [2024-09-20 12:07:35,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030693013] [2024-09-20 12:07:35,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:35,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-20 12:07:35,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:35,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-20 12:07:35,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 12:07:35,141 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:43,109 INFO L93 Difference]: Finished difference Result 209 states and 274 transitions. [2024-09-20 12:07:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-09-20 12:07:43,109 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-20 12:07:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:43,110 INFO L225 Difference]: With dead ends: 209 [2024-09-20 12:07:43,111 INFO L226 Difference]: Without dead ends: 190 [2024-09-20 12:07:43,120 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2815, Invalid=16091, Unknown=0, NotChecked=0, Total=18906 [2024-09-20 12:07:43,120 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:43,121 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 260 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:07:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-09-20 12:07:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2024-09-20 12:07:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.346774193548387) internal successors, (167), 124 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2024-09-20 12:07:43,251 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 35 [2024-09-20 12:07:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:43,251 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2024-09-20 12:07:43,252 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:43,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2024-09-20 12:07:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:07:43,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:43,253 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:43,267 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:43,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:43,454 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:43,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash 968930121, now seen corresponding path program 28 times [2024-09-20 12:07:43,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:43,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422479981] [2024-09-20 12:07:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:44,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:44,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422479981] [2024-09-20 12:07:44,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422479981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15448358] [2024-09-20 12:07:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:07:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:44,541 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) [2024-09-20 12:07:44,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 12:07:44,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:07:44,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:44,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 12:07:44,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:44,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15448358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:45,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:45,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 57 [2024-09-20 12:07:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303255779] [2024-09-20 12:07:45,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:45,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-20 12:07:45,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-20 12:07:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3004, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 12:07:45,881 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:46,725 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2024-09-20 12:07:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 12:07:46,726 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 12:07:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:46,727 INFO L225 Difference]: With dead ends: 147 [2024-09-20 12:07:46,727 INFO L226 Difference]: Without dead ends: 142 [2024-09-20 12:07:46,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=194, Invalid=3112, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 12:07:46,728 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:46,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 265 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:07:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-20 12:07:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2024-09-20 12:07:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3495934959349594) internal successors, (166), 123 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 170 transitions. [2024-09-20 12:07:46,847 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 170 transitions. Word has length 36 [2024-09-20 12:07:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:46,848 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 170 transitions. [2024-09-20 12:07:46,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 55 states have internal predecessors, (89), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:46,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 170 transitions. [2024-09-20 12:07:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:07:46,849 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:46,849 INFO L216 NwaCegarLoop]: trace histogram [18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:46,862 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:47,049 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 12:07:47,050 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:47,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -294547543, now seen corresponding path program 29 times [2024-09-20 12:07:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:47,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56394051] [2024-09-20 12:07:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:47,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56394051] [2024-09-20 12:07:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56394051] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613783995] [2024-09-20 12:07:47,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:07:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:47,495 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) [2024-09-20 12:07:47,496 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 12:07:47,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-20 12:07:47,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:47,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 12:07:47,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:47,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613783995] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:48,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:48,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2024-09-20 12:07:48,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987666444] [2024-09-20 12:07:48,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:48,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-20 12:07:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-20 12:07:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2024-09-20 12:07:48,575 INFO L87 Difference]: Start difference. First operand 128 states and 170 transitions. Second operand has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:07:57,366 INFO L93 Difference]: Finished difference Result 255 states and 344 transitions. [2024-09-20 12:07:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-20 12:07:57,367 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 12:07:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:07:57,368 INFO L225 Difference]: With dead ends: 255 [2024-09-20 12:07:57,368 INFO L226 Difference]: Without dead ends: 250 [2024-09-20 12:07:57,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1525, Invalid=7217, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 12:07:57,369 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 241 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:07:57,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 449 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:07:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-09-20 12:07:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 135. [2024-09-20 12:07:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.376923076923077) internal successors, (179), 130 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 183 transitions. [2024-09-20 12:07:57,490 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 183 transitions. Word has length 36 [2024-09-20 12:07:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:07:57,490 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 183 transitions. [2024-09-20 12:07:57,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:07:57,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 183 transitions. [2024-09-20 12:07:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 12:07:57,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:07:57,491 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:07:57,508 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-20 12:07:57,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-20 12:07:57,692 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:07:57,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:07:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash 7600436, now seen corresponding path program 30 times [2024-09-20 12:07:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:07:57,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706238406] [2024-09-20 12:07:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:07:57,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:07:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:58,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:07:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:07:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:07:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706238406] [2024-09-20 12:07:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706238406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:07:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676495977] [2024-09-20 12:07:58,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:07:58,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:07:58,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:07:58,122 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) [2024-09-20 12:07:58,126 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-20 12:07:58,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-20 12:07:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:07:58,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 12:07:58,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:07:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:58,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:07:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:07:59,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676495977] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:07:59,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:07:59,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-09-20 12:07:59,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265495794] [2024-09-20 12:07:59,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:07:59,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 12:07:59,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:07:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 12:07:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 12:07:59,321 INFO L87 Difference]: Start difference. First operand 135 states and 183 transitions. Second operand has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:09,902 INFO L93 Difference]: Finished difference Result 240 states and 316 transitions. [2024-09-20 12:08:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-09-20 12:08:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-20 12:08:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:09,904 INFO L225 Difference]: With dead ends: 240 [2024-09-20 12:08:09,904 INFO L226 Difference]: Without dead ends: 220 [2024-09-20 12:08:09,905 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5288 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3599, Invalid=20581, Unknown=0, NotChecked=0, Total=24180 [2024-09-20 12:08:09,906 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:09,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 295 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:08:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-20 12:08:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 143. [2024-09-20 12:08:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.3478260869565217) internal successors, (186), 138 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 190 transitions. [2024-09-20 12:08:10,074 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 190 transitions. Word has length 37 [2024-09-20 12:08:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:10,074 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 190 transitions. [2024-09-20 12:08:10,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:10,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 190 transitions. [2024-09-20 12:08:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 12:08:10,075 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:10,075 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:10,092 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:10,276 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-20 12:08:10,276 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:10,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2137856600, now seen corresponding path program 31 times [2024-09-20 12:08:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:10,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548832362] [2024-09-20 12:08:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:10,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:11,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:11,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:11,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548832362] [2024-09-20 12:08:11,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548832362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:11,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616794553] [2024-09-20 12:08:11,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:08:11,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:11,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:11,476 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) [2024-09-20 12:08:11,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-20 12:08:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:11,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 12:08:11,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:11,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:12,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616794553] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:12,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:12,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 61 [2024-09-20 12:08:12,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146268273] [2024-09-20 12:08:12,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:12,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-20 12:08:12,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-20 12:08:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3458, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 12:08:12,919 INFO L87 Difference]: Start difference. First operand 143 states and 190 transitions. Second operand has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:13,937 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2024-09-20 12:08:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-20 12:08:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-20 12:08:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:13,939 INFO L225 Difference]: With dead ends: 162 [2024-09-20 12:08:13,940 INFO L226 Difference]: Without dead ends: 157 [2024-09-20 12:08:13,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=208, Invalid=3574, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 12:08:13,940 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:13,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 265 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:08:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-20 12:08:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2024-09-20 12:08:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3503649635036497) internal successors, (185), 137 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 189 transitions. [2024-09-20 12:08:14,117 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 189 transitions. Word has length 38 [2024-09-20 12:08:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:14,118 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 189 transitions. [2024-09-20 12:08:14,118 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 59 states have internal predecessors, (95), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:14,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:14,118 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 189 transitions. [2024-09-20 12:08:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 12:08:14,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:14,118 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:14,132 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:14,319 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-20 12:08:14,319 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:14,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1813507403, now seen corresponding path program 32 times [2024-09-20 12:08:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:14,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338421859] [2024-09-20 12:08:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:14,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:14,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:14,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:14,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338421859] [2024-09-20 12:08:14,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338421859] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761988485] [2024-09-20 12:08:14,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:08:14,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:14,776 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) [2024-09-20 12:08:14,777 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-20 12:08:14,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:08:14,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:14,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 12:08:14,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:14,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761988485] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:15,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:15,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 60 [2024-09-20 12:08:15,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054646705] [2024-09-20 12:08:15,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:15,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-20 12:08:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-20 12:08:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=3029, Unknown=0, NotChecked=0, Total=3540 [2024-09-20 12:08:15,948 INFO L87 Difference]: Start difference. First operand 142 states and 189 transitions. Second operand has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:29,896 INFO L93 Difference]: Finished difference Result 259 states and 342 transitions. [2024-09-20 12:08:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2024-09-20 12:08:29,897 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-20 12:08:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:29,898 INFO L225 Difference]: With dead ends: 259 [2024-09-20 12:08:29,898 INFO L226 Difference]: Without dead ends: 238 [2024-09-20 12:08:29,899 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6947 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=4534, Invalid=25916, Unknown=0, NotChecked=0, Total=30450 [2024-09-20 12:08:29,900 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:29,900 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 306 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:08:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-09-20 12:08:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 159. [2024-09-20 12:08:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.3506493506493507) internal successors, (208), 154 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 212 transitions. [2024-09-20 12:08:30,149 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 212 transitions. Word has length 39 [2024-09-20 12:08:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:30,149 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 212 transitions. [2024-09-20 12:08:30,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:30,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 212 transitions. [2024-09-20 12:08:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:08:30,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:30,150 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:30,170 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:30,350 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-20 12:08:30,351 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:30,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2013416919, now seen corresponding path program 33 times [2024-09-20 12:08:30,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:30,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310704273] [2024-09-20 12:08:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:30,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:31,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310704273] [2024-09-20 12:08:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310704273] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875228739] [2024-09-20 12:08:31,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:08:31,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:31,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:31,744 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) [2024-09-20 12:08:31,745 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-20 12:08:31,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-20 12:08:31,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:31,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-20 12:08:31,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:32,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:33,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875228739] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:33,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:33,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 19] total 65 [2024-09-20 12:08:33,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565825367] [2024-09-20 12:08:33,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:33,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-20 12:08:33,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-20 12:08:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3944, Unknown=0, NotChecked=0, Total=4160 [2024-09-20 12:08:33,513 INFO L87 Difference]: Start difference. First operand 159 states and 212 transitions. Second operand has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:34,749 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2024-09-20 12:08:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 12:08:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-20 12:08:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:34,751 INFO L225 Difference]: With dead ends: 179 [2024-09-20 12:08:34,751 INFO L226 Difference]: Without dead ends: 174 [2024-09-20 12:08:34,751 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=222, Invalid=4068, Unknown=0, NotChecked=0, Total=4290 [2024-09-20 12:08:34,751 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:34,752 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 12:08:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-20 12:08:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2024-09-20 12:08:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 153 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 211 transitions. [2024-09-20 12:08:34,996 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 211 transitions. Word has length 40 [2024-09-20 12:08:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:34,996 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 211 transitions. [2024-09-20 12:08:34,996 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 63 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:34,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 211 transitions. [2024-09-20 12:08:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:08:34,997 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:34,997 INFO L216 NwaCegarLoop]: trace histogram [21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:35,011 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:35,197 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-20 12:08:35,198 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:35,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash -640559416, now seen corresponding path program 34 times [2024-09-20 12:08:35,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:35,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938033662] [2024-09-20 12:08:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:35,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:35,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938033662] [2024-09-20 12:08:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938033662] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799845786] [2024-09-20 12:08:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:08:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:35,733 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) [2024-09-20 12:08:35,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-20 12:08:35,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:08:35,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:35,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-20 12:08:35,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:35,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:37,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799845786] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:37,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:37,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2024-09-20 12:08:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472957808] [2024-09-20 12:08:37,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:37,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 12:08:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 12:08:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=3227, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 12:08:37,030 INFO L87 Difference]: Start difference. First operand 158 states and 211 transitions. Second operand has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:52,358 INFO L93 Difference]: Finished difference Result 320 states and 432 transitions. [2024-09-20 12:08:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-09-20 12:08:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-20 12:08:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:52,360 INFO L225 Difference]: With dead ends: 320 [2024-09-20 12:08:52,360 INFO L226 Difference]: Without dead ends: 315 [2024-09-20 12:08:52,361 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=2100, Invalid=10332, Unknown=0, NotChecked=0, Total=12432 [2024-09-20 12:08:52,361 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 308 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:52,361 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 519 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 12:08:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-09-20 12:08:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 165. [2024-09-20 12:08:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.375) internal successors, (220), 160 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 224 transitions. [2024-09-20 12:08:52,583 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 224 transitions. Word has length 40 [2024-09-20 12:08:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:52,583 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 224 transitions. [2024-09-20 12:08:52,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:52,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 224 transitions. [2024-09-20 12:08:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:08:52,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:52,584 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:52,598 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:52,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-20 12:08:52,789 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:52,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2044122708, now seen corresponding path program 35 times [2024-09-20 12:08:52,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:52,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498989717] [2024-09-20 12:08:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:53,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:53,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:53,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498989717] [2024-09-20 12:08:53,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498989717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:53,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484135902] [2024-09-20 12:08:53,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:08:53,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:53,319 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) [2024-09-20 12:08:53,320 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-20 12:08:53,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-20 12:08:53,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:53,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-20 12:08:53,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:53,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484135902] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:54,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 64 [2024-09-20 12:08:54,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299262283] [2024-09-20 12:08:54,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:54,850 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-20 12:08:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-20 12:08:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2024-09-20 12:08:54,851 INFO L87 Difference]: Start difference. First operand 165 states and 224 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:12,843 INFO L93 Difference]: Finished difference Result 293 states and 388 transitions. [2024-09-20 12:09:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2024-09-20 12:09:12,844 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-20 12:09:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:12,845 INFO L225 Difference]: With dead ends: 293 [2024-09-20 12:09:12,845 INFO L226 Difference]: Without dead ends: 271 [2024-09-20 12:09:12,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8965 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=5638, Invalid=32192, Unknown=0, NotChecked=0, Total=37830 [2024-09-20 12:09:12,848 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:12,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 348 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:09:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-09-20 12:09:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 174. [2024-09-20 12:09:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.349112426035503) internal successors, (228), 169 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 232 transitions. [2024-09-20 12:09:13,144 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 232 transitions. Word has length 41 [2024-09-20 12:09:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:13,144 INFO L474 AbstractCegarLoop]: Abstraction has 174 states and 232 transitions. [2024-09-20 12:09:13,144 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:13,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 232 transitions. [2024-09-20 12:09:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:09:13,145 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:13,145 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:13,158 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-20 12:09:13,345 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-20 12:09:13,345 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:13,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1090361144, now seen corresponding path program 36 times [2024-09-20 12:09:13,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:13,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963030733] [2024-09-20 12:09:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:13,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:14,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963030733] [2024-09-20 12:09:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963030733] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222099606] [2024-09-20 12:09:14,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:09:14,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:14,841 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) [2024-09-20 12:09:14,842 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-20 12:09:14,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-20 12:09:14,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:14,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-20 12:09:14,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:15,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222099606] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:16,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:16,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 20, 20] total 69 [2024-09-20 12:09:16,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978744745] [2024-09-20 12:09:16,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:16,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 12:09:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 12:09:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4462, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 12:09:16,695 INFO L87 Difference]: Start difference. First operand 174 states and 232 transitions. Second operand has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:21,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:09:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:22,196 INFO L93 Difference]: Finished difference Result 195 states and 253 transitions. [2024-09-20 12:09:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-20 12:09:22,197 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-20 12:09:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:22,198 INFO L225 Difference]: With dead ends: 195 [2024-09-20 12:09:22,198 INFO L226 Difference]: Without dead ends: 190 [2024-09-20 12:09:22,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=236, Invalid=4594, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 12:09:22,199 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:22,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 289 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1245 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-09-20 12:09:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-09-20 12:09:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2024-09-20 12:09:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.3511904761904763) internal successors, (227), 168 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2024-09-20 12:09:22,489 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 42 [2024-09-20 12:09:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:22,490 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2024-09-20 12:09:22,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 67 states have internal predecessors, (107), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:22,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2024-09-20 12:09:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 12:09:22,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:22,491 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:22,510 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-20 12:09:22,692 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:22,692 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:22,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash 594080661, now seen corresponding path program 37 times [2024-09-20 12:09:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905718020] [2024-09-20 12:09:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:23,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:23,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:23,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905718020] [2024-09-20 12:09:23,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905718020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:23,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099686347] [2024-09-20 12:09:23,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:09:23,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:23,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:23,382 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) [2024-09-20 12:09:23,384 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-20 12:09:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:23,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 12:09:23,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:23,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:24,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099686347] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:24,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:24,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 68 [2024-09-20 12:09:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992906483] [2024-09-20 12:09:24,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:24,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 12:09:24,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 12:09:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=3909, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 12:09:24,977 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:48,628 INFO L93 Difference]: Finished difference Result 314 states and 417 transitions. [2024-09-20 12:09:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2024-09-20 12:09:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-20 12:09:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:48,630 INFO L225 Difference]: With dead ends: 314 [2024-09-20 12:09:48,630 INFO L226 Difference]: Without dead ends: 291 [2024-09-20 12:09:48,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11390 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=6930, Invalid=39510, Unknown=0, NotChecked=0, Total=46440 [2024-09-20 12:09:48,634 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:48,635 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 411 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:09:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-09-20 12:09:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 192. [2024-09-20 12:09:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.3529411764705883) internal successors, (253), 187 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 257 transitions. [2024-09-20 12:09:49,024 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 257 transitions. Word has length 43 [2024-09-20 12:09:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:49,025 INFO L474 AbstractCegarLoop]: Abstraction has 192 states and 257 transitions. [2024-09-20 12:09:49,025 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:49,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 257 transitions. [2024-09-20 12:09:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 12:09:49,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:49,026 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:49,043 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-20 12:09:49,230 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:49,231 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:49,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash -872826615, now seen corresponding path program 38 times [2024-09-20 12:09:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681135296] [2024-09-20 12:09:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:51,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681135296] [2024-09-20 12:09:51,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681135296] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815811999] [2024-09-20 12:09:51,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:09:51,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:51,013 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) [2024-09-20 12:09:51,013 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-20 12:09:51,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:09:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:51,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 12:09:51,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:51,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:53,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815811999] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:53,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:53,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 21, 21] total 73 [2024-09-20 12:09:53,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913427112] [2024-09-20 12:09:53,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:53,153 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-20 12:09:53,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-20 12:09:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=5012, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 12:09:53,154 INFO L87 Difference]: Start difference. First operand 192 states and 257 transitions. Second operand has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:57,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:09:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:58,844 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2024-09-20 12:09:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-20 12:09:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-20 12:09:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:58,846 INFO L225 Difference]: With dead ends: 214 [2024-09-20 12:09:58,846 INFO L226 Difference]: Without dead ends: 209 [2024-09-20 12:09:58,846 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=250, Invalid=5152, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 12:09:58,847 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:58,847 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 329 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1501 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-09-20 12:09:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-09-20 12:09:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2024-09-20 12:09:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3548387096774193) internal successors, (252), 186 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:59,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2024-09-20 12:09:59,242 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 44 [2024-09-20 12:09:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:59,242 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2024-09-20 12:09:59,242 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 71 states have internal predecessors, (113), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:59,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2024-09-20 12:09:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 12:09:59,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:59,243 INFO L216 NwaCegarLoop]: trace histogram [24, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:59,258 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-20 12:09:59,443 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-09-20 12:09:59,443 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:59,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1333110391, now seen corresponding path program 39 times [2024-09-20 12:09:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:59,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006617774] [2024-09-20 12:09:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:59,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:00,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:10:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:10:00,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006617774] [2024-09-20 12:10:00,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006617774] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:10:00,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894732105] [2024-09-20 12:10:00,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:10:00,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:10:00,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:10:00,180 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) [2024-09-20 12:10:00,182 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-20 12:10:00,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-20 12:10:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:10:00,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 12:10:00,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:10:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:00,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:10:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:01,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894732105] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:10:01,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:10:01,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 71 [2024-09-20 12:10:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883277249] [2024-09-20 12:10:01,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:10:01,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-20 12:10:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:10:02,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-20 12:10:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=4116, Unknown=0, NotChecked=0, Total=4970 [2024-09-20 12:10:02,001 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:10:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:10:27,494 INFO L93 Difference]: Finished difference Result 392 states and 529 transitions. [2024-09-20 12:10:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-09-20 12:10:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-20 12:10:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:10:27,496 INFO L225 Difference]: With dead ends: 392 [2024-09-20 12:10:27,496 INFO L226 Difference]: Without dead ends: 387 [2024-09-20 12:10:27,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=2796, Invalid=14234, Unknown=0, NotChecked=0, Total=17030 [2024-09-20 12:10:27,498 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 404 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:10:27,498 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 611 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 12:10:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-09-20 12:10:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 198. [2024-09-20 12:10:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.3730569948186528) internal successors, (265), 193 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:10:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 269 transitions. [2024-09-20 12:10:27,857 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 269 transitions. Word has length 44 [2024-09-20 12:10:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:10:27,857 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 269 transitions. [2024-09-20 12:10:27,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:10:27,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 269 transitions. [2024-09-20 12:10:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 12:10:27,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:10:27,858 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:10:27,871 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-20 12:10:28,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:10:28,058 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:10:28,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1252283532, now seen corresponding path program 40 times [2024-09-20 12:10:28,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:10:28,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864812162] [2024-09-20 12:10:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:10:28,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:10:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:28,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:10:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:28,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:10:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864812162] [2024-09-20 12:10:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864812162] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:10:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203473741] [2024-09-20 12:10:28,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:10:28,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:10:28,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:10:28,718 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) [2024-09-20 12:10:28,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-20 12:10:28,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:10:28,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:10:28,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-20 12:10:28,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:10:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:28,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:10:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203473741] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:10:30,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:10:30,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 72 [2024-09-20 12:10:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989961477] [2024-09-20 12:10:30,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:10:30,462 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-20 12:10:30,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:10:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-20 12:10:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=4391, Unknown=0, NotChecked=0, Total=5112 [2024-09-20 12:10:30,463 INFO L87 Difference]: Start difference. First operand 198 states and 269 transitions. Second operand has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)