./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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-de52.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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:47:16,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:47:16,430 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:47:16,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:47:16,436 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:47:16,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:47:16,463 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:47:16,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:47:16,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:47:16,465 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:47:16,466 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:47:16,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:47:16,466 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:47:16,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:47:16,469 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:47:16,469 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:47:16,469 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:47:16,470 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:47:16,470 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:47:16,470 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:47:16,470 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:47:16,470 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:47:16,471 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:47:16,471 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:47:16,471 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:47:16,471 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:47:16,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:47:16,471 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:47:16,472 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:47:16,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:47:16,472 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:47:16,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:47:16,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:47:16,473 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:47:16,473 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:47:16,473 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:47:16,473 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:47:16,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:47:16,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:47:16,474 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:47:16,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:47:16,476 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:47:16,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:47:16,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:47:16,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:47:16,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:47:16,721 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:47:16,721 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:47:16,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-15 18:47:17,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:47:18,086 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:47:18,086 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-15 18:47:18,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7c5f6276c/c4685f1769ad4a7da00d47c6a211a7c1/FLAG2d2944688 [2024-09-15 18:47:18,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7c5f6276c/c4685f1769ad4a7da00d47c6a211a7c1 [2024-09-15 18:47:18,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:47:18,490 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:47:18,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:47:18,490 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:47:18,495 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:47:18,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21837da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18, skipping insertion in model container [2024-09-15 18:47:18,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,508 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:47:18,620 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-de52.c[368,381] [2024-09-15 18:47:18,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:47:18,647 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:47:18,657 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-de52.c[368,381] [2024-09-15 18:47:18,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:47:18,676 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:47:18,676 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18 WrapperNode [2024-09-15 18:47:18,676 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:47:18,677 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:47:18,677 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:47:18,677 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:47:18,683 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,693 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:47:18,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:47:18,694 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:47:18,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:47:18,694 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:47:18,702 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,703 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,716 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]. [2024-09-15 18:47:18,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,723 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:47:18,729 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:47:18,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:47:18,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:47:18,731 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (1/1) ... [2024-09-15 18:47:18,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:47:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:18,760 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) [2024-09-15 18:47:18,765 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 [2024-09-15 18:47:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:47:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:47:18,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:47:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:47:18,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:47:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:47:18,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:47:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:47:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:47:18,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:47:18,857 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:47:18,858 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:47:18,995 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-15 18:47:18,997 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:47:19,014 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:47:19,014 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-15 18:47:19,014 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:47:19 BoogieIcfgContainer [2024-09-15 18:47:19,015 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:47:19,016 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:47:19,016 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:47:19,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:47:19,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:47:18" (1/3) ... [2024-09-15 18:47:19,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71df4be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:47:19, skipping insertion in model container [2024-09-15 18:47:19,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:18" (2/3) ... [2024-09-15 18:47:19,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71df4be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:47:19, skipping insertion in model container [2024-09-15 18:47:19,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:47:19" (3/3) ... [2024-09-15 18:47:19,027 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2024-09-15 18:47:19,038 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:47:19,038 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:47:19,079 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:47:19,084 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;@29fd6af7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:47:19,084 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:47:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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) [2024-09-15 18:47:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-15 18:47:19,092 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:19,093 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:19,093 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:19,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash -356520028, now seen corresponding path program 1 times [2024-09-15 18:47:19,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:19,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234148200] [2024-09-15 18:47:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:19,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:19,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:19,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234148200] [2024-09-15 18:47:19,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234148200] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:19,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:19,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 18:47:19,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500135096] [2024-09-15 18:47:19,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:19,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 18:47:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 18:47:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 18:47:19,250 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-09-15 18:47:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:19,273 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2024-09-15 18:47:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 18:47:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 [2024-09-15 18:47:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:19,278 INFO L225 Difference]: With dead ends: 38 [2024-09-15 18:47:19,279 INFO L226 Difference]: Without dead ends: 16 [2024-09-15 18:47:19,281 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 [2024-09-15 18:47:19,283 INFO L434 NwaCegarLoop]: 24 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, 24 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 [2024-09-15 18:47:19,284 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-15 18:47:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-15 18:47:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2024-09-15 18:47:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-09-15 18:47:19,309 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2024-09-15 18:47:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:19,309 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-09-15 18:47:19,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-09-15 18:47:19,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-09-15 18:47:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-15 18:47:19,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:19,311 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:19,311 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:47:19,311 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:19,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,315 INFO L85 PathProgramCache]: Analyzing trace with hash 315017388, now seen corresponding path program 1 times [2024-09-15 18:47:19,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261418170] [2024-09-15 18:47:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:19,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261418170] [2024-09-15 18:47:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261418170] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:19,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:19,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:47:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543514693] [2024-09-15 18:47:19,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:19,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:47:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:19,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:47:19,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:19,564 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-09-15 18:47:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:19,631 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-15 18:47:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:47:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 [2024-09-15 18:47:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:19,632 INFO L225 Difference]: With dead ends: 33 [2024-09-15 18:47:19,632 INFO L226 Difference]: Without dead ends: 22 [2024-09-15 18:47:19,633 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 [2024-09-15 18:47:19,635 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:19,635 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-15 18:47:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-15 18:47:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2024-09-15 18:47:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-09-15 18:47:19,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2024-09-15 18:47:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:19,643 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-09-15 18:47:19,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-09-15 18:47:19,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-09-15 18:47:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 18:47:19,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:19,645 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:19,645 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 18:47:19,645 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:19,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1680996671, now seen corresponding path program 1 times [2024-09-15 18:47:19,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:19,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817854683] [2024-09-15 18:47:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:19,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:19,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:19,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817854683] [2024-09-15 18:47:19,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817854683] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:19,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:19,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:47:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482530397] [2024-09-15 18:47:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:19,692 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:47:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:47:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:47:19,693 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:19,710 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-15 18:47:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:47:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-15 18:47:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:19,711 INFO L225 Difference]: With dead ends: 34 [2024-09-15 18:47:19,712 INFO L226 Difference]: Without dead ends: 27 [2024-09-15 18:47:19,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:47:19,713 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:19,713 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-15 18:47:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-15 18:47:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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) [2024-09-15 18:47:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-09-15 18:47:19,719 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2024-09-15 18:47:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:19,719 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-09-15 18:47:19,719 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-09-15 18:47:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 18:47:19,720 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:19,720 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:19,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 18:47:19,720 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:19,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1211142226, now seen corresponding path program 1 times [2024-09-15 18:47:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729907899] [2024-09-15 18:47:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:19,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:19,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729907899] [2024-09-15 18:47:19,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729907899] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:19,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:19,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:47:19,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45598529] [2024-09-15 18:47:19,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:19,752 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:47:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:47:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:47:19,752 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:19,770 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-15 18:47:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:47:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-15 18:47:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:19,771 INFO L225 Difference]: With dead ends: 40 [2024-09-15 18:47:19,772 INFO L226 Difference]: Without dead ends: 31 [2024-09-15 18:47:19,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:47:19,773 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:19,774 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-15 18:47:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-15 18:47:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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) [2024-09-15 18:47:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2024-09-15 18:47:19,785 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 16 [2024-09-15 18:47:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:19,785 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2024-09-15 18:47:19,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-09-15 18:47:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 18:47:19,786 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:19,787 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:19,787 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 18:47:19,787 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:19,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1994481964, now seen corresponding path program 1 times [2024-09-15 18:47:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:19,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427637381] [2024-09-15 18:47:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:19,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:19,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427637381] [2024-09-15 18:47:19,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427637381] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:19,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:19,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 18:47:19,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845997715] [2024-09-15 18:47:19,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:19,861 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 18:47:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:19,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 18:47:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 18:47:19,863 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:19,898 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-15 18:47:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 18:47:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-15 18:47:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:19,899 INFO L225 Difference]: With dead ends: 39 [2024-09-15 18:47:19,899 INFO L226 Difference]: Without dead ends: 27 [2024-09-15 18:47:19,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:19,901 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:19,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-15 18:47:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-15 18:47:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2024-09-15 18:47:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-09-15 18:47:19,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2024-09-15 18:47:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:19,909 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-09-15 18:47:19,909 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-09-15 18:47:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 18:47:19,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:19,910 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:19,910 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-15 18:47:19,910 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:19,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1135312256, now seen corresponding path program 1 times [2024-09-15 18:47:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860543574] [2024-09-15 18:47:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:20,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860543574] [2024-09-15 18:47:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860543574] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89354914] [2024-09-15 18:47:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:20,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:20,009 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) [2024-09-15 18:47:20,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:47:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:47:20,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:20,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:20,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89354914] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:20,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-15 18:47:20,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-15 18:47:20,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209350490] [2024-09-15 18:47:20,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:20,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 18:47:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 18:47:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:47:20,121 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-15 18:47:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:20,148 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-15 18:47:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 18:47:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-15 18:47:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:20,151 INFO L225 Difference]: With dead ends: 34 [2024-09-15 18:47:20,151 INFO L226 Difference]: Without dead ends: 24 [2024-09-15 18:47:20,152 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:47:20,152 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:20,153 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-15 18:47:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-15 18:47:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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) [2024-09-15 18:47:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-09-15 18:47:20,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 18 [2024-09-15 18:47:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:20,163 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-09-15 18:47:20,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-15 18:47:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-09-15 18:47:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 18:47:20,164 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:20,164 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:20,178 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:20,367 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 18:47:20,368 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:20,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1896560672, now seen corresponding path program 1 times [2024-09-15 18:47:20,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:20,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240656943] [2024-09-15 18:47:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:20,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240656943] [2024-09-15 18:47:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240656943] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638522226] [2024-09-15 18:47:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:20,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:20,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:20,443 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) [2024-09-15 18:47:20,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:47:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:47:20,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:20,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:20,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638522226] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:20,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-15 18:47:20,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-15 18:47:20,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141416285] [2024-09-15 18:47:20,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:20,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 18:47:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 18:47:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:47:20,548 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-15 18:47:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:20,572 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-09-15 18:47:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 18:47:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-15 18:47:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:20,574 INFO L225 Difference]: With dead ends: 29 [2024-09-15 18:47:20,574 INFO L226 Difference]: Without dead ends: 21 [2024-09-15 18:47:20,574 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:47:20,575 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:20,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-15 18:47:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-15 18:47:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-15 18:47:20,581 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2024-09-15 18:47:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:20,581 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-15 18:47:20,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-15 18:47:20,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-15 18:47:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 18:47:20,582 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:20,582 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:20,594 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:20,786 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 18:47:20,787 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:20,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -399434628, now seen corresponding path program 1 times [2024-09-15 18:47:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:20,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530499131] [2024-09-15 18:47:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:20,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:20,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:20,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530499131] [2024-09-15 18:47:20,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530499131] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:20,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319791022] [2024-09-15 18:47:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:20,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:20,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:20,896 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) [2024-09-15 18:47:20,898 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:47:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:47:20,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:20,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:21,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319791022] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:21,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:21,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-15 18:47:21,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582797850] [2024-09-15 18:47:21,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:21,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 18:47:21,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 18:47:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:47:21,064 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-15 18:47:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:21,357 INFO L93 Difference]: Finished difference Result 77 states and 116 transitions. [2024-09-15 18:47:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:47:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 [2024-09-15 18:47:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:21,359 INFO L225 Difference]: With dead ends: 77 [2024-09-15 18:47:21,359 INFO L226 Difference]: Without dead ends: 65 [2024-09-15 18:47:21,359 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:47:21,360 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:21,360 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-15 18:47:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 32. [2024-09-15 18:47:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2024-09-15 18:47:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-15 18:47:21,367 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2024-09-15 18:47:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:21,367 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-15 18:47:21,367 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-15 18:47:21,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-15 18:47:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 18:47:21,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:21,368 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:21,383 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:21,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-15 18:47:21,569 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:21,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263027, now seen corresponding path program 1 times [2024-09-15 18:47:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:21,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096991369] [2024-09-15 18:47:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:21,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:21,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096991369] [2024-09-15 18:47:21,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096991369] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484028679] [2024-09-15 18:47:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:21,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:21,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:21,627 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) [2024-09-15 18:47:21,627 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:47:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:47:21,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:47:21,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:47:21,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484028679] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:21,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:21,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-15 18:47:21,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221547727] [2024-09-15 18:47:21,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:21,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:47:21,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:21,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:47:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:47:21,732 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2024-09-15 18:47:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:21,775 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2024-09-15 18:47:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:47:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 19 [2024-09-15 18:47:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:21,776 INFO L225 Difference]: With dead ends: 66 [2024-09-15 18:47:21,776 INFO L226 Difference]: Without dead ends: 54 [2024-09-15 18:47:21,776 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:47:21,776 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:21,777 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-15 18:47:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-09-15 18:47:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 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) [2024-09-15 18:47:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-09-15 18:47:21,786 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 19 [2024-09-15 18:47:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:21,786 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-09-15 18:47:21,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2024-09-15 18:47:21,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-09-15 18:47:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-15 18:47:21,787 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:21,787 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:21,800 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:47:21,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:21,992 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash 537966210, now seen corresponding path program 1 times [2024-09-15 18:47:21,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:21,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113206553] [2024-09-15 18:47:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:21,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:22,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:22,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113206553] [2024-09-15 18:47:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113206553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:22,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661631208] [2024-09-15 18:47:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:22,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:22,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:22,083 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) [2024-09-15 18:47:22,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:47:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 18:47:22,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:22,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661631208] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:22,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:22,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-09-15 18:47:22,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037723050] [2024-09-15 18:47:22,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:22,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 18:47:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 18:47:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:47:22,228 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:22,284 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-09-15 18:47:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:47:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-15 18:47:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:22,285 INFO L225 Difference]: With dead ends: 62 [2024-09-15 18:47:22,285 INFO L226 Difference]: Without dead ends: 47 [2024-09-15 18:47:22,285 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:47:22,286 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:22,286 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-15 18:47:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-09-15 18:47:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 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) [2024-09-15 18:47:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2024-09-15 18:47:22,294 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 20 [2024-09-15 18:47:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:22,295 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2024-09-15 18:47:22,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:22,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2024-09-15 18:47:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-15 18:47:22,296 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:22,296 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:22,309 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:22,496 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 18:47:22,496 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:22,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash 548739116, now seen corresponding path program 2 times [2024-09-15 18:47:22,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:22,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511422840] [2024-09-15 18:47:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:22,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:22,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511422840] [2024-09-15 18:47:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511422840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311164825] [2024-09-15 18:47:22,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:22,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:22,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:22,566 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) [2024-09-15 18:47:22,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:47:22,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:22,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:22,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:47:22,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:22,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:22,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311164825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:22,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:22,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-15 18:47:22,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598809910] [2024-09-15 18:47:22,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:22,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 18:47:22,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 18:47:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:47:22,700 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:22,821 INFO L93 Difference]: Finished difference Result 96 states and 141 transitions. [2024-09-15 18:47:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 18:47:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-15 18:47:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:22,822 INFO L225 Difference]: With dead ends: 96 [2024-09-15 18:47:22,822 INFO L226 Difference]: Without dead ends: 68 [2024-09-15 18:47:22,822 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:47:22,823 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:22,823 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 103 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-15 18:47:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2024-09-15 18:47:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2024-09-15 18:47:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-15 18:47:22,834 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 21 [2024-09-15 18:47:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:22,834 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-15 18:47:22,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:22,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-15 18:47:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 18:47:22,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:22,835 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:22,847 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:47:23,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 18:47:23,036 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:23,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1383500575, now seen corresponding path program 3 times [2024-09-15 18:47:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:23,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688645170] [2024-09-15 18:47:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:23,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:23,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688645170] [2024-09-15 18:47:23,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688645170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457547538] [2024-09-15 18:47:23,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:23,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:23,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:23,171 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) [2024-09-15 18:47:23,173 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:47:23,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-15 18:47:23,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:23,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 18:47:23,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:23,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:23,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457547538] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:23,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:23,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-15 18:47:23,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152002409] [2024-09-15 18:47:23,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:23,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:47:23,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:47:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:47:23,310 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-09-15 18:47:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:23,602 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2024-09-15 18:47:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:47:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-15 18:47:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:23,603 INFO L225 Difference]: With dead ends: 84 [2024-09-15 18:47:23,603 INFO L226 Difference]: Without dead ends: 67 [2024-09-15 18:47:23,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:47:23,604 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:23,604 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-15 18:47:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-09-15 18:47:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 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) [2024-09-15 18:47:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-15 18:47:23,620 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 22 [2024-09-15 18:47:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:23,621 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-15 18:47:23,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-09-15 18:47:23,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-15 18:47:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-15 18:47:23,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:23,622 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:23,635 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:23,822 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:23,823 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:23,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:23,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1003223996, now seen corresponding path program 2 times [2024-09-15 18:47:23,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:23,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444881463] [2024-09-15 18:47:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:23,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 18:47:23,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444881463] [2024-09-15 18:47:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444881463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553606134] [2024-09-15 18:47:23,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:23,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:23,916 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) [2024-09-15 18:47:23,917 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 18:47:23,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:23,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:23,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:47:23,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:24,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:24,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553606134] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:24,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:24,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 21 [2024-09-15 18:47:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865065241] [2024-09-15 18:47:24,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:24,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:47:24,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:47:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:47:24,191 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:24,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:24,784 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2024-09-15 18:47:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-15 18:47:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-15 18:47:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:24,785 INFO L225 Difference]: With dead ends: 147 [2024-09-15 18:47:24,786 INFO L226 Difference]: Without dead ends: 108 [2024-09-15 18:47:24,786 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 18:47:24,787 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:24,787 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 252 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-15 18:47:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2024-09-15 18:47:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.369047619047619) internal successors, (115), 84 states have internal predecessors, (115), 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) [2024-09-15 18:47:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2024-09-15 18:47:24,816 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 23 [2024-09-15 18:47:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:24,816 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2024-09-15 18:47:24,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:24,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2024-09-15 18:47:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-15 18:47:24,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:24,818 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:24,832 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 18:47:25,022 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:25,023 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:25,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 411216348, now seen corresponding path program 4 times [2024-09-15 18:47:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977081611] [2024-09-15 18:47:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:25,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:25,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:25,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:25,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977081611] [2024-09-15 18:47:25,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977081611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:25,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168139537] [2024-09-15 18:47:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:25,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:25,143 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) [2024-09-15 18:47:25,145 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 18:47:25,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:25,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:25,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:47:25,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:47:25,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:47:25,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168139537] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:25,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:25,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-15 18:47:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045038932] [2024-09-15 18:47:25,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:25,339 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 18:47:25,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 18:47:25,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:47:25,340 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2024-09-15 18:47:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:26,034 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-15 18:47:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-15 18:47:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 25 [2024-09-15 18:47:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:26,035 INFO L225 Difference]: With dead ends: 123 [2024-09-15 18:47:26,035 INFO L226 Difference]: Without dead ends: 96 [2024-09-15 18:47:26,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:47:26,037 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:26,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 139 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-15 18:47:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2024-09-15 18:47:26,056 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) [2024-09-15 18:47:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-15 18:47:26,057 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 25 [2024-09-15 18:47:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:26,057 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-15 18:47:26,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2024-09-15 18:47:26,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-15 18:47:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-15 18:47:26,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:26,061 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:26,074 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 18:47:26,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 18:47:26,262 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:26,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:26,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1940516302, now seen corresponding path program 3 times [2024-09-15 18:47:26,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:26,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590496912] [2024-09-15 18:47:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:26,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:26,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:47:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:26,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590496912] [2024-09-15 18:47:26,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590496912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:26,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148484128] [2024-09-15 18:47:26,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:26,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:26,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:26,369 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) [2024-09-15 18:47:26,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 18:47:26,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:47:26,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:26,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 18:47:26,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:26,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:47:26,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148484128] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:26,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:26,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 24 [2024-09-15 18:47:26,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112618636] [2024-09-15 18:47:26,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:26,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:47:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:26,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:47:26,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:47:26,665 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:27,409 INFO L93 Difference]: Finished difference Result 171 states and 236 transitions. [2024-09-15 18:47:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-15 18:47:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-15 18:47:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:27,410 INFO L225 Difference]: With dead ends: 171 [2024-09-15 18:47:27,410 INFO L226 Difference]: Without dead ends: 134 [2024-09-15 18:47:27,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2024-09-15 18:47:27,412 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:27,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 246 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-15 18:47:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2024-09-15 18:47:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 96 states have internal predecessors, (131), 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) [2024-09-15 18:47:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-15 18:47:27,429 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 25 [2024-09-15 18:47:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:27,429 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-15 18:47:27,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:27,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-15 18:47:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:47:27,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:27,430 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:27,443 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:27,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 18:47:27,631 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:27,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 712565185, now seen corresponding path program 4 times [2024-09-15 18:47:27,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:27,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076946505] [2024-09-15 18:47:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:27,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:27,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:47:27,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:27,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076946505] [2024-09-15 18:47:27,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076946505] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:27,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293388564] [2024-09-15 18:47:27,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:27,741 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) [2024-09-15 18:47:27,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 18:47:27,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:27,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:27,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:47:27,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:47:27,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:47:27,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293388564] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:27,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:27,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-15 18:47:27,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702118509] [2024-09-15 18:47:27,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:27,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:47:27,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:47:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:27,833 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:27,871 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2024-09-15 18:47:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:47:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-15 18:47:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:27,873 INFO L225 Difference]: With dead ends: 125 [2024-09-15 18:47:27,873 INFO L226 Difference]: Without dead ends: 99 [2024-09-15 18:47:27,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:27,874 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:27,874 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-15 18:47:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-15 18:47:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.372340425531915) internal successors, (129), 94 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) [2024-09-15 18:47:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2024-09-15 18:47:27,902 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 26 [2024-09-15 18:47:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:27,902 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2024-09-15 18:47:27,902 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:27,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2024-09-15 18:47:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:47:27,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:27,903 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:27,916 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:28,107 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 18:47:28,108 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:28,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash -133051136, now seen corresponding path program 5 times [2024-09-15 18:47:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:28,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139127189] [2024-09-15 18:47:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:28,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:28,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 18:47:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139127189] [2024-09-15 18:47:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139127189] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333568973] [2024-09-15 18:47:28,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:47:28,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:28,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:28,205 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) [2024-09-15 18:47:28,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 18:47:28,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:47:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:28,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:47:28,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:28,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-15 18:47:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333568973] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:28,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:28,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-15 18:47:28,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315910306] [2024-09-15 18:47:28,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:28,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:47:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:47:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:47:28,335 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) [2024-09-15 18:47:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:28,544 INFO L93 Difference]: Finished difference Result 216 states and 305 transitions. [2024-09-15 18:47:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 18:47:28,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 26 [2024-09-15 18:47:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:28,546 INFO L225 Difference]: With dead ends: 216 [2024-09-15 18:47:28,546 INFO L226 Difference]: Without dead ends: 173 [2024-09-15 18:47:28,546 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:47:28,547 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:28,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 268 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-15 18:47:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2024-09-15 18:47:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.3055555555555556) internal successors, (141), 108 states have internal predecessors, (141), 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) [2024-09-15 18:47:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2024-09-15 18:47:28,571 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 26 [2024-09-15 18:47:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:28,571 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2024-09-15 18:47:28,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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) [2024-09-15 18:47:28,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2024-09-15 18:47:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 18:47:28,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:28,572 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:28,585 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:28,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 18:47:28,773 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:28,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1263484460, now seen corresponding path program 5 times [2024-09-15 18:47:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:28,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556945305] [2024-09-15 18:47:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:28,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:28,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556945305] [2024-09-15 18:47:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556945305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337702085] [2024-09-15 18:47:28,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:47:28,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:28,875 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) [2024-09-15 18:47:28,876 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 18:47:28,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:47:28,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:28,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-15 18:47:28,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:28,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:47:29,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337702085] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:29,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:29,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 5] total 21 [2024-09-15 18:47:29,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492032261] [2024-09-15 18:47:29,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:29,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:47:29,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:47:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:47:29,052 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:29,701 INFO L93 Difference]: Finished difference Result 229 states and 321 transitions. [2024-09-15 18:47:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-15 18:47:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-15 18:47:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:29,703 INFO L225 Difference]: With dead ends: 229 [2024-09-15 18:47:29,703 INFO L226 Difference]: Without dead ends: 204 [2024-09-15 18:47:29,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:47:29,704 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:29,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 319 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-09-15 18:47:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2024-09-15 18:47:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.3203125) internal successors, (169), 128 states have internal predecessors, (169), 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) [2024-09-15 18:47:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2024-09-15 18:47:29,736 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 27 [2024-09-15 18:47:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:29,736 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2024-09-15 18:47:29,736 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:29,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2024-09-15 18:47:29,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 18:47:29,737 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:29,737 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:29,749 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 18:47:29,938 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-15 18:47:29,939 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:29,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:29,939 INFO L85 PathProgramCache]: Analyzing trace with hash -695293183, now seen corresponding path program 6 times [2024-09-15 18:47:29,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:29,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808742349] [2024-09-15 18:47:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:29,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:30,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:30,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808742349] [2024-09-15 18:47:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808742349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216090190] [2024-09-15 18:47:30,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:47:30,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:30,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:30,078 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) [2024-09-15 18:47:30,080 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 18:47:30,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:47:30,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:30,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:47:30,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 18:47:30,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 18:47:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216090190] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:30,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-15 18:47:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201465559] [2024-09-15 18:47:30,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:30,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:47:30,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:47:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:47:30,337 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:31,350 INFO L93 Difference]: Finished difference Result 200 states and 273 transitions. [2024-09-15 18:47:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-15 18:47:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-15 18:47:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:31,351 INFO L225 Difference]: With dead ends: 200 [2024-09-15 18:47:31,351 INFO L226 Difference]: Without dead ends: 170 [2024-09-15 18:47:31,352 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=440, Invalid=4962, Unknown=0, NotChecked=0, Total=5402 [2024-09-15 18:47:31,352 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:31,353 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 168 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-15 18:47:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2024-09-15 18:47:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 142 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) [2024-09-15 18:47:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2024-09-15 18:47:31,380 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 28 [2024-09-15 18:47:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:31,380 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2024-09-15 18:47:31,381 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:31,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2024-09-15 18:47:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 18:47:31,381 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:31,382 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:31,394 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-15 18:47:31,585 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:31,586 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:31,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2037353101, now seen corresponding path program 6 times [2024-09-15 18:47:31,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:31,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059887375] [2024-09-15 18:47:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:31,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:31,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059887375] [2024-09-15 18:47:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059887375] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676634597] [2024-09-15 18:47:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:47:31,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:31,695 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) [2024-09-15 18:47:31,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 18:47:31,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:47:31,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:31,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:47:31,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:31,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:31,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676634597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:31,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:31,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-15 18:47:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7469619] [2024-09-15 18:47:31,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:31,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:47:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:47:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:47:31,810 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-09-15 18:47:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:31,900 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2024-09-15 18:47:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:47:31,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 29 [2024-09-15 18:47:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:31,902 INFO L225 Difference]: With dead ends: 165 [2024-09-15 18:47:31,902 INFO L226 Difference]: Without dead ends: 151 [2024-09-15 18:47:31,902 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:47:31,903 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:31,903 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-15 18:47:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-09-15 18:47:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.2876712328767124) internal successors, (188), 146 states have internal predecessors, (188), 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) [2024-09-15 18:47:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 192 transitions. [2024-09-15 18:47:31,940 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 192 transitions. Word has length 29 [2024-09-15 18:47:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:31,940 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 192 transitions. [2024-09-15 18:47:31,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-09-15 18:47:31,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 192 transitions. [2024-09-15 18:47:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 18:47:31,942 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:31,942 INFO L216 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:31,956 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:32,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:32,143 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:32,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash 947704670, now seen corresponding path program 7 times [2024-09-15 18:47:32,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:32,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782363543] [2024-09-15 18:47:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:32,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:47:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782363543] [2024-09-15 18:47:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782363543] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:32,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804609459] [2024-09-15 18:47:32,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:47:32,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:32,271 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) [2024-09-15 18:47:32,272 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 18:47:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:32,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-15 18:47:32,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:47:32,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-15 18:47:32,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804609459] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:32,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:32,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 8] total 23 [2024-09-15 18:47:32,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984316575] [2024-09-15 18:47:32,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:32,491 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 18:47:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 18:47:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-15 18:47:32,491 INFO L87 Difference]: Start difference. First operand 151 states and 192 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:33,501 INFO L93 Difference]: Finished difference Result 302 states and 406 transitions. [2024-09-15 18:47:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-15 18:47:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-15 18:47:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:33,503 INFO L225 Difference]: With dead ends: 302 [2024-09-15 18:47:33,503 INFO L226 Difference]: Without dead ends: 254 [2024-09-15 18:47:33,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2024-09-15 18:47:33,504 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:33,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 481 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:47:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-15 18:47:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2024-09-15 18:47:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.2866666666666666) internal successors, (193), 150 states have internal predecessors, (193), 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) [2024-09-15 18:47:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2024-09-15 18:47:33,545 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 29 [2024-09-15 18:47:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:33,545 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2024-09-15 18:47:33,545 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:33,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2024-09-15 18:47:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:47:33,546 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:33,546 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:33,558 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:33,750 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:33,751 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:33,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1065772992, now seen corresponding path program 2 times [2024-09-15 18:47:33,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:33,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416756193] [2024-09-15 18:47:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:33,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:47:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416756193] [2024-09-15 18:47:33,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416756193] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029941034] [2024-09-15 18:47:33,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:33,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:33,874 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) [2024-09-15 18:47:33,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-15 18:47:33,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:33,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:33,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:47:33,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-15 18:47:34,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-15 18:47:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029941034] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:34,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-15 18:47:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48052132] [2024-09-15 18:47:34,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:34,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:47:34,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:47:34,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:47:34,142 INFO L87 Difference]: Start difference. First operand 155 states and 197 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2024-09-15 18:47:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:34,952 INFO L93 Difference]: Finished difference Result 231 states and 297 transitions. [2024-09-15 18:47:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-15 18:47:34,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 30 [2024-09-15 18:47:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:34,954 INFO L225 Difference]: With dead ends: 231 [2024-09-15 18:47:34,954 INFO L226 Difference]: Without dead ends: 197 [2024-09-15 18:47:34,955 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2024-09-15 18:47:34,955 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:34,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-15 18:47:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2024-09-15 18:47:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2638888888888888) internal successors, (182), 144 states have internal predecessors, (182), 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) [2024-09-15 18:47:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2024-09-15 18:47:34,994 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 30 [2024-09-15 18:47:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:34,994 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2024-09-15 18:47:34,994 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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) [2024-09-15 18:47:34,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2024-09-15 18:47:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:47:34,995 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:34,995 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:35,007 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:35,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:35,195 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:35,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash -850750864, now seen corresponding path program 8 times [2024-09-15 18:47:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:35,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798624905] [2024-09-15 18:47:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:35,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:35,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:47:35,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:35,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798624905] [2024-09-15 18:47:35,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798624905] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431077875] [2024-09-15 18:47:35,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:35,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:35,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:35,313 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) [2024-09-15 18:47:35,314 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-15 18:47:35,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:35,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:35,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-15 18:47:35,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:35,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 18:47:35,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431077875] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:35,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:35,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 12] total 30 [2024-09-15 18:47:35,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990465716] [2024-09-15 18:47:35,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:35,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:47:35,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:47:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:47:35,662 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:37,383 INFO L93 Difference]: Finished difference Result 324 states and 427 transitions. [2024-09-15 18:47:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-15 18:47:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-15 18:47:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:37,385 INFO L225 Difference]: With dead ends: 324 [2024-09-15 18:47:37,385 INFO L226 Difference]: Without dead ends: 249 [2024-09-15 18:47:37,386 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2024-09-15 18:47:37,386 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:37,386 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 596 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:47:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-09-15 18:47:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 171. [2024-09-15 18:47:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3253012048192772) internal successors, (220), 166 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) [2024-09-15 18:47:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2024-09-15 18:47:37,427 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 30 [2024-09-15 18:47:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:37,427 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2024-09-15 18:47:37,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:37,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2024-09-15 18:47:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:47:37,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:37,428 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:37,442 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:37,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-15 18:47:37,628 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:37,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1118269741, now seen corresponding path program 9 times [2024-09-15 18:47:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616294816] [2024-09-15 18:47:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:37,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:37,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:47:37,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:37,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616294816] [2024-09-15 18:47:37,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616294816] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:37,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184312445] [2024-09-15 18:47:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:37,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:37,737 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) [2024-09-15 18:47:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-15 18:47:37,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:47:37,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:37,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:47:37,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:47:37,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:47:37,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184312445] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:37,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:37,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-15 18:47:37,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634743978] [2024-09-15 18:47:37,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:37,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:47:37,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:47:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:47:37,850 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-09-15 18:47:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:37,926 INFO L93 Difference]: Finished difference Result 187 states and 244 transitions. [2024-09-15 18:47:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:47:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 [2024-09-15 18:47:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:37,927 INFO L225 Difference]: With dead ends: 187 [2024-09-15 18:47:37,927 INFO L226 Difference]: Without dead ends: 159 [2024-09-15 18:47:37,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:47:37,928 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:37,928 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-15 18:47:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-09-15 18:47:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.3376623376623376) internal successors, (206), 154 states have internal predecessors, (206), 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) [2024-09-15 18:47:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2024-09-15 18:47:37,968 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 31 [2024-09-15 18:47:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:37,969 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2024-09-15 18:47:37,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-09-15 18:47:37,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2024-09-15 18:47:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:47:37,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:37,970 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:37,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-15 18:47:38,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-15 18:47:38,174 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:38,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:38,174 INFO L85 PathProgramCache]: Analyzing trace with hash -502026436, now seen corresponding path program 7 times [2024-09-15 18:47:38,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:38,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745679366] [2024-09-15 18:47:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:38,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:38,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:38,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:38,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745679366] [2024-09-15 18:47:38,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745679366] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139608371] [2024-09-15 18:47:38,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:47:38,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:38,339 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) [2024-09-15 18:47:38,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-15 18:47:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:38,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 18:47:38,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-15 18:47:38,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-15 18:47:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139608371] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:38,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-09-15 18:47:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732061221] [2024-09-15 18:47:38,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:38,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 18:47:38,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 18:47:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:47:38,569 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2024-09-15 18:47:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:39,591 INFO L93 Difference]: Finished difference Result 537 states and 812 transitions. [2024-09-15 18:47:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-09-15 18:47:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 [2024-09-15 18:47:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:39,594 INFO L225 Difference]: With dead ends: 537 [2024-09-15 18:47:39,594 INFO L226 Difference]: Without dead ends: 485 [2024-09-15 18:47:39,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=967, Invalid=3863, Unknown=0, NotChecked=0, Total=4830 [2024-09-15 18:47:39,595 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:39,595 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 405 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:47:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-09-15 18:47:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 235. [2024-09-15 18:47:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 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) [2024-09-15 18:47:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 328 transitions. [2024-09-15 18:47:39,668 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 328 transitions. Word has length 31 [2024-09-15 18:47:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:39,668 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 328 transitions. [2024-09-15 18:47:39,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2024-09-15 18:47:39,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 328 transitions. [2024-09-15 18:47:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 18:47:39,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:39,669 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:39,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-15 18:47:39,869 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-15 18:47:39,870 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:39,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -737150836, now seen corresponding path program 10 times [2024-09-15 18:47:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:39,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959902724] [2024-09-15 18:47:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:39,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:40,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:47:40,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:40,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959902724] [2024-09-15 18:47:40,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959902724] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:40,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918555224] [2024-09-15 18:47:40,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:40,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:40,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:40,007 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) [2024-09-15 18:47:40,008 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-15 18:47:40,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:40,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-15 18:47:40,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:47:40,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:47:40,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918555224] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:40,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:40,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-15 18:47:40,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087272392] [2024-09-15 18:47:40,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:40,165 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 18:47:40,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:40,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 18:47:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:47:40,166 INFO L87 Difference]: Start difference. First operand 235 states and 328 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-09-15 18:47:44,470 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 [] [2024-09-15 18:47:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:44,568 INFO L93 Difference]: Finished difference Result 462 states and 718 transitions. [2024-09-15 18:47:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 18:47:44,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 [2024-09-15 18:47:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:44,570 INFO L225 Difference]: With dead ends: 462 [2024-09-15 18:47:44,570 INFO L226 Difference]: Without dead ends: 423 [2024-09-15 18:47:44,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:47:44,571 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:44,571 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 122 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-15 18:47:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-15 18:47:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 333. [2024-09-15 18:47:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.4695121951219512) internal successors, (482), 328 states have internal predecessors, (482), 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) [2024-09-15 18:47:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 486 transitions. [2024-09-15 18:47:44,675 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 486 transitions. Word has length 33 [2024-09-15 18:47:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:44,675 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 486 transitions. [2024-09-15 18:47:44,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-09-15 18:47:44,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 486 transitions. [2024-09-15 18:47:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 18:47:44,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:44,676 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:44,688 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:44,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-15 18:47:44,877 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:44,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1047726976, now seen corresponding path program 11 times [2024-09-15 18:47:44,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:44,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390091392] [2024-09-15 18:47:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:44,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:45,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:45,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390091392] [2024-09-15 18:47:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390091392] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:45,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399790584] [2024-09-15 18:47:45,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:47:45,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:45,044 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) [2024-09-15 18:47:45,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-15 18:47:45,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-15 18:47:45,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:45,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-15 18:47:45,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:45,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-15 18:47:45,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399790584] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:45,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:45,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 8] total 24 [2024-09-15 18:47:45,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797958384] [2024-09-15 18:47:45,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:45,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:47:45,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:47:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:47:45,314 INFO L87 Difference]: Start difference. First operand 333 states and 486 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:46,379 INFO L93 Difference]: Finished difference Result 676 states and 984 transitions. [2024-09-15 18:47:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-15 18:47:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-15 18:47:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:46,382 INFO L225 Difference]: With dead ends: 676 [2024-09-15 18:47:46,382 INFO L226 Difference]: Without dead ends: 511 [2024-09-15 18:47:46,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2024-09-15 18:47:46,384 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:46,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 581 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:47:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-09-15 18:47:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 367. [2024-09-15 18:47:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.4116022099447514) internal successors, (511), 362 states have internal predecessors, (511), 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) [2024-09-15 18:47:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 515 transitions. [2024-09-15 18:47:46,521 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 515 transitions. Word has length 34 [2024-09-15 18:47:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:46,522 INFO L474 AbstractCegarLoop]: Abstraction has 367 states and 515 transitions. [2024-09-15 18:47:46,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:46,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 515 transitions. [2024-09-15 18:47:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 18:47:46,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:46,523 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:46,535 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:46,727 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-15 18:47:46,728 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:46,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash 513042476, now seen corresponding path program 12 times [2024-09-15 18:47:46,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:46,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526757826] [2024-09-15 18:47:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:46,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:46,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:47:46,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:46,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526757826] [2024-09-15 18:47:46,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526757826] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:46,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770020216] [2024-09-15 18:47:46,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:47:46,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:46,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:46,927 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) [2024-09-15 18:47:46,928 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-15 18:47:46,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 18:47:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:46,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:47:46,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 18:47:47,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 18:47:47,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770020216] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:47,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 10] total 30 [2024-09-15 18:47:47,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323211147] [2024-09-15 18:47:47,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:47,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:47:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:47,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:47:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:47:47,341 INFO L87 Difference]: Start difference. First operand 367 states and 515 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:49,284 INFO L93 Difference]: Finished difference Result 742 states and 1046 transitions. [2024-09-15 18:47:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-15 18:47:49,284 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-15 18:47:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:49,286 INFO L225 Difference]: With dead ends: 742 [2024-09-15 18:47:49,286 INFO L226 Difference]: Without dead ends: 595 [2024-09-15 18:47:49,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1068, Invalid=6942, Unknown=0, NotChecked=0, Total=8010 [2024-09-15 18:47:49,288 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 210 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:49,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 686 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-15 18:47:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-09-15 18:47:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 383. [2024-09-15 18:47:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.3862433862433863) internal successors, (524), 378 states have internal predecessors, (524), 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) [2024-09-15 18:47:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 528 transitions. [2024-09-15 18:47:49,412 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 528 transitions. Word has length 35 [2024-09-15 18:47:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:49,413 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 528 transitions. [2024-09-15 18:47:49,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:49,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 528 transitions. [2024-09-15 18:47:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 18:47:49,414 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:49,414 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:49,426 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-15 18:47:49,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-15 18:47:49,618 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:49,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1273319442, now seen corresponding path program 3 times [2024-09-15 18:47:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:49,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115547827] [2024-09-15 18:47:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:49,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-15 18:47:49,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:49,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115547827] [2024-09-15 18:47:49,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115547827] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:49,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021163876] [2024-09-15 18:47:49,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:49,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:49,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:49,836 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) [2024-09-15 18:47:49,838 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-15 18:47:49,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:47:49,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:49,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:47:49,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-15 18:47:50,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-15 18:47:50,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021163876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:50,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:50,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-15 18:47:50,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821631529] [2024-09-15 18:47:50,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:50,210 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:47:50,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:50,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:47:50,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:47:50,211 INFO L87 Difference]: Start difference. First operand 383 states and 528 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2024-09-15 18:47:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:52,019 INFO L93 Difference]: Finished difference Result 812 states and 1129 transitions. [2024-09-15 18:47:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-09-15 18:47:52,020 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 36 [2024-09-15 18:47:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:52,022 INFO L225 Difference]: With dead ends: 812 [2024-09-15 18:47:52,022 INFO L226 Difference]: Without dead ends: 735 [2024-09-15 18:47:52,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1589, Invalid=6243, Unknown=0, NotChecked=0, Total=7832 [2024-09-15 18:47:52,024 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:52,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 374 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:47:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-15 18:47:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 436. [2024-09-15 18:47:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.382830626450116) internal successors, (596), 431 states have internal predecessors, (596), 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) [2024-09-15 18:47:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 600 transitions. [2024-09-15 18:47:52,183 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 600 transitions. Word has length 36 [2024-09-15 18:47:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:52,184 INFO L474 AbstractCegarLoop]: Abstraction has 436 states and 600 transitions. [2024-09-15 18:47:52,184 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2024-09-15 18:47:52,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 600 transitions. [2024-09-15 18:47:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 18:47:52,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:52,185 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:52,197 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:52,385 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-15 18:47:52,385 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:52,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash 771129250, now seen corresponding path program 13 times [2024-09-15 18:47:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:52,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292114181] [2024-09-15 18:47:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:52,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:52,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:47:52,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:52,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292114181] [2024-09-15 18:47:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292114181] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:52,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990287637] [2024-09-15 18:47:52,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:47:52,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:52,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:52,600 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) [2024-09-15 18:47:52,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-15 18:47:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:52,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:47:52,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 18:47:52,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 18:47:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990287637] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:52,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-15 18:47:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19733302] [2024-09-15 18:47:52,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:52,818 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:47:52,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:47:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:47:52,819 INFO L87 Difference]: Start difference. First operand 436 states and 600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:57,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:48:05,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:48:13,194 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 [] [2024-09-15 18:48:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:13,358 INFO L93 Difference]: Finished difference Result 629 states and 870 transitions. [2024-09-15 18:48:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 18:48:13,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-15 18:48:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:13,361 INFO L225 Difference]: With dead ends: 629 [2024-09-15 18:48:13,361 INFO L226 Difference]: Without dead ends: 611 [2024-09-15 18:48:13,361 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=189, Invalid=621, Unknown=2, NotChecked=0, Total=812 [2024-09-15 18:48:13,362 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:13,362 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 193 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2024-09-15 18:48:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2024-09-15 18:48:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 476. [2024-09-15 18:48:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.3736730360934182) internal successors, (647), 471 states have internal predecessors, (647), 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) [2024-09-15 18:48:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 651 transitions. [2024-09-15 18:48:13,545 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 651 transitions. Word has length 38 [2024-09-15 18:48:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:13,545 INFO L474 AbstractCegarLoop]: Abstraction has 476 states and 651 transitions. [2024-09-15 18:48:13,545 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:13,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 651 transitions. [2024-09-15 18:48:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 18:48:13,546 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:13,546 INFO L216 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:13,559 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-15 18:48:13,747 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:13,747 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:13,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1102958530, now seen corresponding path program 14 times [2024-09-15 18:48:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:13,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349384162] [2024-09-15 18:48:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:13,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:13,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:48:13,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349384162] [2024-09-15 18:48:13,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349384162] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791218095] [2024-09-15 18:48:13,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:48:13,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:13,950 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) [2024-09-15 18:48:13,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-15 18:48:13,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:48:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:14,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-15 18:48:14,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:48:14,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-15 18:48:14,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791218095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:14,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:14,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 17] total 45 [2024-09-15 18:48:14,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330636077] [2024-09-15 18:48:14,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:14,601 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-15 18:48:14,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:14,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-15 18:48:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:48:14,601 INFO L87 Difference]: Start difference. First operand 476 states and 651 transitions. Second operand has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:18,026 INFO L93 Difference]: Finished difference Result 1019 states and 1392 transitions. [2024-09-15 18:48:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-15 18:48:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-15 18:48:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:18,029 INFO L225 Difference]: With dead ends: 1019 [2024-09-15 18:48:18,029 INFO L226 Difference]: Without dead ends: 779 [2024-09-15 18:48:18,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1601, Invalid=10389, Unknown=0, NotChecked=0, Total=11990 [2024-09-15 18:48:18,031 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 92 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:18,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1304 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 18:48:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2024-09-15 18:48:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 468. [2024-09-15 18:48:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 463 states have (on average 1.408207343412527) internal successors, (652), 463 states have internal predecessors, (652), 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) [2024-09-15 18:48:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 656 transitions. [2024-09-15 18:48:18,261 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 656 transitions. Word has length 38 [2024-09-15 18:48:18,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:18,262 INFO L474 AbstractCegarLoop]: Abstraction has 468 states and 656 transitions. [2024-09-15 18:48:18,262 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:18,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 656 transitions. [2024-09-15 18:48:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 18:48:18,263 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:18,263 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:18,275 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-15 18:48:18,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:18,464 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:18,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821890, now seen corresponding path program 4 times [2024-09-15 18:48:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:18,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239932120] [2024-09-15 18:48:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:18,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-15 18:48:18,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239932120] [2024-09-15 18:48:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239932120] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815707041] [2024-09-15 18:48:18,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:48:18,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:18,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:18,672 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) [2024-09-15 18:48:18,673 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-15 18:48:18,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:48:18,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:18,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:48:18,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 18:48:18,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 18:48:19,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815707041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:19,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:19,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-09-15 18:48:19,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864680850] [2024-09-15 18:48:19,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:19,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-15 18:48:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-15 18:48:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:48:19,084 INFO L87 Difference]: Start difference. First operand 468 states and 656 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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) [2024-09-15 18:48:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:22,290 INFO L93 Difference]: Finished difference Result 1176 states and 1620 transitions. [2024-09-15 18:48:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-15 18:48:22,291 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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 [2024-09-15 18:48:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:22,294 INFO L225 Difference]: With dead ends: 1176 [2024-09-15 18:48:22,294 INFO L226 Difference]: Without dead ends: 1076 [2024-09-15 18:48:22,296 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2517, Invalid=10823, Unknown=0, NotChecked=0, Total=13340 [2024-09-15 18:48:22,297 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 231 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:22,297 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 542 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:48:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2024-09-15 18:48:22,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 537. [2024-09-15 18:48:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 532 states have (on average 1.3966165413533835) internal successors, (743), 532 states have internal predecessors, (743), 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) [2024-09-15 18:48:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 747 transitions. [2024-09-15 18:48:22,583 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 747 transitions. Word has length 39 [2024-09-15 18:48:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:22,583 INFO L474 AbstractCegarLoop]: Abstraction has 537 states and 747 transitions. [2024-09-15 18:48:22,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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) [2024-09-15 18:48:22,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 747 transitions. [2024-09-15 18:48:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:48:22,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:22,585 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:22,597 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-15 18:48:22,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:22,789 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:22,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1752322643, now seen corresponding path program 15 times [2024-09-15 18:48:22,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:22,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993750020] [2024-09-15 18:48:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:22,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:22,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 18:48:22,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:22,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993750020] [2024-09-15 18:48:22,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993750020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:22,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428310087] [2024-09-15 18:48:22,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:48:22,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:22,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:22,967 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) [2024-09-15 18:48:22,968 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-15 18:48:23,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:48:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:23,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:48:23,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 18:48:23,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 18:48:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428310087] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:23,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:23,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-09-15 18:48:23,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541573553] [2024-09-15 18:48:23,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:23,151 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 18:48:23,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:23,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 18:48:23,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:48:23,152 INFO L87 Difference]: Start difference. First operand 537 states and 747 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:23,537 INFO L93 Difference]: Finished difference Result 616 states and 847 transitions. [2024-09-15 18:48:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:48:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-15 18:48:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:23,540 INFO L225 Difference]: With dead ends: 616 [2024-09-15 18:48:23,540 INFO L226 Difference]: Without dead ends: 568 [2024-09-15 18:48:23,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:48:23,540 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:23,540 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:48:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-15 18:48:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 523. [2024-09-15 18:48:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 518 states have (on average 1.4054054054054055) internal successors, (728), 518 states have internal predecessors, (728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 732 transitions. [2024-09-15 18:48:23,840 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 732 transitions. Word has length 41 [2024-09-15 18:48:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:23,840 INFO L474 AbstractCegarLoop]: Abstraction has 523 states and 732 transitions. [2024-09-15 18:48:23,840 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:23,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 732 transitions. [2024-09-15 18:48:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:48:23,841 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:23,841 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:23,853 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-15 18:48:24,041 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-15 18:48:24,041 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:24,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:24,042 INFO L85 PathProgramCache]: Analyzing trace with hash 846902028, now seen corresponding path program 16 times [2024-09-15 18:48:24,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:24,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124604681] [2024-09-15 18:48:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:24,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:24,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:48:24,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124604681] [2024-09-15 18:48:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124604681] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284401732] [2024-09-15 18:48:24,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:48:24,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:24,256 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) [2024-09-15 18:48:24,257 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-15 18:48:24,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:48:24,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:24,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-15 18:48:24,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:48:24,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-15 18:48:24,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284401732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:24,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:24,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 32 [2024-09-15 18:48:24,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259486017] [2024-09-15 18:48:24,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:24,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:48:24,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:24,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:48:24,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:48:24,562 INFO L87 Difference]: Start difference. First operand 523 states and 732 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:26,072 INFO L93 Difference]: Finished difference Result 1216 states and 1685 transitions. [2024-09-15 18:48:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-15 18:48:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-15 18:48:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:26,076 INFO L225 Difference]: With dead ends: 1216 [2024-09-15 18:48:26,076 INFO L226 Difference]: Without dead ends: 972 [2024-09-15 18:48:26,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2024-09-15 18:48:26,077 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 205 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:26,077 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 753 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:48:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-09-15 18:48:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 584. [2024-09-15 18:48:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.3523316062176165) internal successors, (783), 579 states have internal predecessors, (783), 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) [2024-09-15 18:48:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 787 transitions. [2024-09-15 18:48:26,418 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 787 transitions. Word has length 41 [2024-09-15 18:48:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:26,418 INFO L474 AbstractCegarLoop]: Abstraction has 584 states and 787 transitions. [2024-09-15 18:48:26,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:26,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 787 transitions. [2024-09-15 18:48:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 18:48:26,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:26,419 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:26,432 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-15 18:48:26,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-15 18:48:26,620 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:26,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash 706640914, now seen corresponding path program 5 times [2024-09-15 18:48:26,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:26,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673625006] [2024-09-15 18:48:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:26,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:26,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:48:26,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673625006] [2024-09-15 18:48:26,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673625006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954105849] [2024-09-15 18:48:26,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:48:26,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:26,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:26,890 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) [2024-09-15 18:48:26,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-15 18:48:26,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-15 18:48:26,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:26,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-15 18:48:27,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:48:27,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:48:27,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954105849] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:27,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:27,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2024-09-15 18:48:27,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539436575] [2024-09-15 18:48:27,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:27,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:48:27,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:48:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:48:27,571 INFO L87 Difference]: Start difference. First operand 584 states and 787 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-09-15 18:48:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:33,204 INFO L93 Difference]: Finished difference Result 1001 states and 1353 transitions. [2024-09-15 18:48:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-09-15 18:48:33,204 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-15 18:48:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:33,207 INFO L225 Difference]: With dead ends: 1001 [2024-09-15 18:48:33,207 INFO L226 Difference]: Without dead ends: 893 [2024-09-15 18:48:33,208 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1557, Invalid=28199, Unknown=0, NotChecked=0, Total=29756 [2024-09-15 18:48:33,208 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:33,209 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 285 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-15 18:48:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2024-09-15 18:48:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 552. [2024-09-15 18:48:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.3345521023765996) internal successors, (730), 547 states have internal predecessors, (730), 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) [2024-09-15 18:48:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 734 transitions. [2024-09-15 18:48:33,531 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 734 transitions. Word has length 42 [2024-09-15 18:48:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:33,531 INFO L474 AbstractCegarLoop]: Abstraction has 552 states and 734 transitions. [2024-09-15 18:48:33,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-09-15 18:48:33,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 734 transitions. [2024-09-15 18:48:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 18:48:33,532 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:33,532 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:33,544 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-15 18:48:33,733 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-15 18:48:33,733 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:33,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:33,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1382511156, now seen corresponding path program 17 times [2024-09-15 18:48:33,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:33,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044526248] [2024-09-15 18:48:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:33,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:33,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:48:33,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044526248] [2024-09-15 18:48:33,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044526248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807299252] [2024-09-15 18:48:33,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:48:33,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:33,980 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) [2024-09-15 18:48:33,981 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-15 18:48:34,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:48:34,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:34,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-15 18:48:34,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 18:48:34,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 18:48:34,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807299252] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:34,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:34,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-15 18:48:34,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883906865] [2024-09-15 18:48:34,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:34,314 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:48:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:48:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:48:34,314 INFO L87 Difference]: Start difference. First operand 552 states and 734 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:38,592 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 [] [2024-09-15 18:48:46,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:48:54,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:49:02,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:49:07,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:49:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:07,397 INFO L93 Difference]: Finished difference Result 891 states and 1231 transitions. [2024-09-15 18:49:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-15 18:49:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-15 18:49:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:07,400 INFO L225 Difference]: With dead ends: 891 [2024-09-15 18:49:07,400 INFO L226 Difference]: Without dead ends: 860 [2024-09-15 18:49:07,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=344, Invalid=1293, Unknown=3, NotChecked=0, Total=1640 [2024-09-15 18:49:07,401 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:07,401 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 232 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2024-09-15 18:49:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2024-09-15 18:49:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 690. [2024-09-15 18:49:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 685 states have (on average 1.3620437956204379) internal successors, (933), 685 states have internal predecessors, (933), 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) [2024-09-15 18:49:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 937 transitions. [2024-09-15 18:49:07,850 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 937 transitions. Word has length 43 [2024-09-15 18:49:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:07,850 INFO L474 AbstractCegarLoop]: Abstraction has 690 states and 937 transitions. [2024-09-15 18:49:07,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:07,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 937 transitions. [2024-09-15 18:49:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:49:07,851 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:07,851 INFO L216 NwaCegarLoop]: trace histogram [13, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:07,864 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-15 18:49:08,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-15 18:49:08,052 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:08,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:08,052 INFO L85 PathProgramCache]: Analyzing trace with hash 764816386, now seen corresponding path program 18 times [2024-09-15 18:49:08,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:08,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025317474] [2024-09-15 18:49:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:08,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:08,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 18:49:08,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025317474] [2024-09-15 18:49:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025317474] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100482733] [2024-09-15 18:49:08,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:49:08,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:08,290 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) [2024-09-15 18:49:08,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-15 18:49:08,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-15 18:49:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:08,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:49:08,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-15 18:49:08,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-15 18:49:08,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100482733] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:08,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:08,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2024-09-15 18:49:08,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315618950] [2024-09-15 18:49:08,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:08,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:49:08,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:49:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:49:08,733 INFO L87 Difference]: Start difference. First operand 690 states and 937 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:12,664 INFO L93 Difference]: Finished difference Result 1431 states and 1953 transitions. [2024-09-15 18:49:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2024-09-15 18:49:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-15 18:49:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:12,668 INFO L225 Difference]: With dead ends: 1431 [2024-09-15 18:49:12,668 INFO L226 Difference]: Without dead ends: 1020 [2024-09-15 18:49:12,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2024-09-15 18:49:12,670 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:12,670 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1186 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 18:49:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2024-09-15 18:49:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 633. [2024-09-15 18:49:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 628 states have (on average 1.372611464968153) internal successors, (862), 628 states have internal predecessors, (862), 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) [2024-09-15 18:49:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 866 transitions. [2024-09-15 18:49:13,092 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 866 transitions. Word has length 44 [2024-09-15 18:49:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:13,092 INFO L474 AbstractCegarLoop]: Abstraction has 633 states and 866 transitions. [2024-09-15 18:49:13,092 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:13,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 866 transitions. [2024-09-15 18:49:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 18:49:13,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:13,094 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:13,106 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-15 18:49:13,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-15 18:49:13,294 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:13,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1388997645, now seen corresponding path program 6 times [2024-09-15 18:49:13,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:13,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786412611] [2024-09-15 18:49:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:13,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:13,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:49:13,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:13,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786412611] [2024-09-15 18:49:13,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786412611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:13,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632006685] [2024-09-15 18:49:13,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:49:13,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:13,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:13,604 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) [2024-09-15 18:49:13,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-15 18:49:13,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-15 18:49:13,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:13,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-15 18:49:13,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-15 18:49:13,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-15 18:49:14,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632006685] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:14,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:14,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-15 18:49:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943473885] [2024-09-15 18:49:14,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:14,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 18:49:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 18:49:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:49:14,408 INFO L87 Difference]: Start difference. First operand 633 states and 866 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 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) [2024-09-15 18:49:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:24,090 INFO L93 Difference]: Finished difference Result 1095 states and 1487 transitions. [2024-09-15 18:49:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-09-15 18:49:24,090 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 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 45 [2024-09-15 18:49:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:24,094 INFO L225 Difference]: With dead ends: 1095 [2024-09-15 18:49:24,094 INFO L226 Difference]: Without dead ends: 981 [2024-09-15 18:49:24,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18795 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2342, Invalid=48960, Unknown=0, NotChecked=0, Total=51302 [2024-09-15 18:49:24,096 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 5338 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 5338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:24,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 351 Invalid, 5638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 5338 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-15 18:49:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2024-09-15 18:49:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 653. [2024-09-15 18:49:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 648 states have (on average 1.3503086419753085) internal successors, (875), 648 states have internal predecessors, (875), 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) [2024-09-15 18:49:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 879 transitions. [2024-09-15 18:49:24,543 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 879 transitions. Word has length 45 [2024-09-15 18:49:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:24,543 INFO L474 AbstractCegarLoop]: Abstraction has 653 states and 879 transitions. [2024-09-15 18:49:24,544 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 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) [2024-09-15 18:49:24,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:24,544 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 879 transitions. [2024-09-15 18:49:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 18:49:24,545 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:24,545 INFO L216 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:24,557 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-15 18:49:24,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-15 18:49:24,748 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:24,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2100972460, now seen corresponding path program 19 times [2024-09-15 18:49:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:24,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53543475] [2024-09-15 18:49:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:24,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:24,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:49:25,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53543475] [2024-09-15 18:49:25,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53543475] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819391719] [2024-09-15 18:49:25,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:49:25,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:25,003 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) [2024-09-15 18:49:25,004 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-15 18:49:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:25,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-15 18:49:25,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:49:25,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-15 18:49:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819391719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:25,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:25,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 14] total 39 [2024-09-15 18:49:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14052016] [2024-09-15 18:49:25,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:25,494 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-15 18:49:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-15 18:49:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-09-15 18:49:25,494 INFO L87 Difference]: Start difference. First operand 653 states and 879 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:30,415 INFO L93 Difference]: Finished difference Result 1398 states and 1905 transitions. [2024-09-15 18:49:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-09-15 18:49:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-15 18:49:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:30,419 INFO L225 Difference]: With dead ends: 1398 [2024-09-15 18:49:30,419 INFO L226 Difference]: Without dead ends: 1092 [2024-09-15 18:49:30,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1037, Invalid=15475, Unknown=0, NotChecked=0, Total=16512 [2024-09-15 18:49:30,420 INFO L434 NwaCegarLoop]: 76 mSDtfsCounter, 138 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:30,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1664 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 18:49:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2024-09-15 18:49:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 683. [2024-09-15 18:49:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.37905604719764) internal successors, (935), 678 states have internal predecessors, (935), 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) [2024-09-15 18:49:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 939 transitions. [2024-09-15 18:49:30,945 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 939 transitions. Word has length 45 [2024-09-15 18:49:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:30,945 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 939 transitions. [2024-09-15 18:49:30,945 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:30,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 939 transitions. [2024-09-15 18:49:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:49:30,946 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:30,946 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:30,959 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-15 18:49:31,147 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-15 18:49:31,147 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:31,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash 516511681, now seen corresponding path program 20 times [2024-09-15 18:49:31,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:31,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394402554] [2024-09-15 18:49:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:31,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:31,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-15 18:49:31,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:31,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394402554] [2024-09-15 18:49:31,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394402554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:31,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284520855] [2024-09-15 18:49:31,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:49:31,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:31,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:31,307 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) [2024-09-15 18:49:31,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-15 18:49:31,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:49:31,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:31,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-15 18:49:31,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-15 18:49:31,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-15 18:49:31,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284520855] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:31,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:31,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-09-15 18:49:31,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031510762] [2024-09-15 18:49:31,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:31,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:49:31,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:49:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:49:31,479 INFO L87 Difference]: Start difference. First operand 683 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:32,135 INFO L93 Difference]: Finished difference Result 765 states and 1040 transitions. [2024-09-15 18:49:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:49:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-15 18:49:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:32,138 INFO L225 Difference]: With dead ends: 765 [2024-09-15 18:49:32,139 INFO L226 Difference]: Without dead ends: 715 [2024-09-15 18:49:32,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:49:32,139 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:32,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 128 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:49:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-09-15 18:49:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 667. [2024-09-15 18:49:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 662 states have (on average 1.3867069486404835) internal successors, (918), 662 states have internal predecessors, (918), 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) [2024-09-15 18:49:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 922 transitions. [2024-09-15 18:49:32,672 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 922 transitions. Word has length 46 [2024-09-15 18:49:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:32,672 INFO L474 AbstractCegarLoop]: Abstraction has 667 states and 922 transitions. [2024-09-15 18:49:32,672 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:32,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 922 transitions. [2024-09-15 18:49:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:49:32,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:32,673 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:32,685 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-15 18:49:32,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-15 18:49:32,874 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:32,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2051607266, now seen corresponding path program 21 times [2024-09-15 18:49:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654423941] [2024-09-15 18:49:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:32,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:33,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 18:49:33,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:33,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654423941] [2024-09-15 18:49:33,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654423941] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:33,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679831511] [2024-09-15 18:49:33,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:49:33,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:33,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:33,188 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) [2024-09-15 18:49:33,190 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-15 18:49:33,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 18:49:33,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:33,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:49:33,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-15 18:49:33,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-15 18:49:33,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679831511] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:33,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:33,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2024-09-15 18:49:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121116411] [2024-09-15 18:49:33,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:33,680 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:49:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:49:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:49:33,681 INFO L87 Difference]: Start difference. First operand 667 states and 922 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2024-09-15 18:49:38,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:49:44,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:49:48,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:49:56,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:50:05,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:50:17,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:50:21,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:50:25,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:50:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:26,030 INFO L93 Difference]: Finished difference Result 1038 states and 1516 transitions. [2024-09-15 18:50:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-15 18:50:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 48 [2024-09-15 18:50:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:26,034 INFO L225 Difference]: With dead ends: 1038 [2024-09-15 18:50:26,034 INFO L226 Difference]: Without dead ends: 1001 [2024-09-15 18:50:26,035 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=464, Invalid=1883, Unknown=5, NotChecked=0, Total=2352 [2024-09-15 18:50:26,035 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 63 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:26,035 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 189 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 304 Invalid, 7 Unknown, 0 Unchecked, 30.9s Time] [2024-09-15 18:50:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2024-09-15 18:50:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 882. [2024-09-15 18:50:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 877 states have (on average 1.4378563283922463) internal successors, (1261), 877 states have internal predecessors, (1261), 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) [2024-09-15 18:50:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1265 transitions. [2024-09-15 18:50:26,741 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1265 transitions. Word has length 48 [2024-09-15 18:50:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:26,741 INFO L474 AbstractCegarLoop]: Abstraction has 882 states and 1265 transitions. [2024-09-15 18:50:26,741 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2024-09-15 18:50:26,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1265 transitions. [2024-09-15 18:50:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:50:26,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:26,742 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:26,755 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-15 18:50:26,946 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:26,946 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:26,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1035706990, now seen corresponding path program 22 times [2024-09-15 18:50:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:26,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949119360] [2024-09-15 18:50:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:26,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:27,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:50:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-15 18:50:27,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:50:27,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949119360] [2024-09-15 18:50:27,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949119360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:50:27,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737091149] [2024-09-15 18:50:27,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:50:27,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:50:27,234 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) [2024-09-15 18:50:27,235 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-15 18:50:27,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:50:27,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:50:27,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-15 18:50:27,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:50:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 18:50:27,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 18:50:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737091149] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:27,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:27,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-15 18:50:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665102622] [2024-09-15 18:50:27,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:27,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 18:50:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 18:50:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:50:27,990 INFO L87 Difference]: Start difference. First operand 882 states and 1265 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2024-09-15 18:50:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:34,607 INFO L93 Difference]: Finished difference Result 1260 states and 1741 transitions. [2024-09-15 18:50:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-09-15 18:50:34,607 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 48 [2024-09-15 18:50:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:34,611 INFO L225 Difference]: With dead ends: 1260 [2024-09-15 18:50:34,611 INFO L226 Difference]: Without dead ends: 1162 [2024-09-15 18:50:34,612 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1577, Invalid=16783, Unknown=0, NotChecked=0, Total=18360 [2024-09-15 18:50:34,612 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:34,612 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 648 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-15 18:50:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2024-09-15 18:50:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 834. [2024-09-15 18:50:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.4330518697225574) internal successors, (1188), 829 states have internal predecessors, (1188), 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) [2024-09-15 18:50:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1192 transitions. [2024-09-15 18:50:35,306 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1192 transitions. Word has length 48 [2024-09-15 18:50:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:35,307 INFO L474 AbstractCegarLoop]: Abstraction has 834 states and 1192 transitions. [2024-09-15 18:50:35,307 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2024-09-15 18:50:35,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1192 transitions. [2024-09-15 18:50:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:50:35,308 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:35,308 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:35,320 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-15 18:50:35,508 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:35,508 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:35,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash -308673998, now seen corresponding path program 7 times [2024-09-15 18:50:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:35,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978948418] [2024-09-15 18:50:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:35,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:35,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:50:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:50:35,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:50:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978948418] [2024-09-15 18:50:35,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978948418] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:50:35,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812983365] [2024-09-15 18:50:35,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:50:35,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:35,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:50:35,888 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) [2024-09-15 18:50:35,888 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-15 18:50:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:35,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-15 18:50:35,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:50:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 18:50:36,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 18:50:36,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812983365] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:36,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:36,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-15 18:50:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821201111] [2024-09-15 18:50:36,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:36,797 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:50:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:50:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:50:36,798 INFO L87 Difference]: Start difference. First operand 834 states and 1192 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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) [2024-09-15 18:50:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:49,084 INFO L93 Difference]: Finished difference Result 1394 states and 1948 transitions. [2024-09-15 18:50:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2024-09-15 18:50:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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 48 [2024-09-15 18:50:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:49,088 INFO L225 Difference]: With dead ends: 1394 [2024-09-15 18:50:49,088 INFO L226 Difference]: Without dead ends: 1258 [2024-09-15 18:50:49,090 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 80 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24160 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2754, Invalid=62526, Unknown=0, NotChecked=0, Total=65280 [2024-09-15 18:50:49,091 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 344 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 6626 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 6928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 6626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:49,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 389 Invalid, 6928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 6626 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-15 18:50:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2024-09-15 18:50:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 855. [2024-09-15 18:50:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 850 states have (on average 1.4141176470588235) internal successors, (1202), 850 states have internal predecessors, (1202), 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) [2024-09-15 18:50:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1206 transitions. [2024-09-15 18:50:49,837 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1206 transitions. Word has length 48 [2024-09-15 18:50:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:49,838 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 1206 transitions. [2024-09-15 18:50:49,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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) [2024-09-15 18:50:49,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1206 transitions. [2024-09-15 18:50:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:50:49,840 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:49,840 INFO L216 NwaCegarLoop]: trace histogram [15, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:49,852 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-15 18:50:50,043 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:50,044 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:50,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1163134880, now seen corresponding path program 23 times [2024-09-15 18:50:50,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:50,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451714999] [2024-09-15 18:50:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:50,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:50:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-15 18:50:50,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:50:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451714999] [2024-09-15 18:50:50,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451714999] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:50:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526602541] [2024-09-15 18:50:50,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:50:50,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:50,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:50:50,375 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) [2024-09-15 18:50:50,376 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-15 18:50:50,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-15 18:50:50,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:50:50,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-15 18:50:50,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:50:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-15 18:50:50,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-15 18:50:50,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526602541] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:50,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 12] total 39 [2024-09-15 18:50:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055930708] [2024-09-15 18:50:50,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:50,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-15 18:50:50,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-15 18:50:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2024-09-15 18:50:50,920 INFO L87 Difference]: Start difference. First operand 855 states and 1206 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2024-09-15 18:50:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:54,274 INFO L93 Difference]: Finished difference Result 1918 states and 2689 transitions. [2024-09-15 18:50:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-15 18:50:54,275 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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 48 [2024-09-15 18:50:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:54,279 INFO L225 Difference]: With dead ends: 1918 [2024-09-15 18:50:54,279 INFO L226 Difference]: Without dead ends: 1657 [2024-09-15 18:50:54,280 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=984, Invalid=3176, Unknown=0, NotChecked=0, Total=4160 [2024-09-15 18:50:54,280 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 323 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:54,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1417 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:50:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2024-09-15 18:50:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 957. [2024-09-15 18:50:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 952 states have (on average 1.3592436974789917) internal successors, (1294), 952 states have internal predecessors, (1294), 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) [2024-09-15 18:50:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1298 transitions. [2024-09-15 18:50:55,026 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1298 transitions. Word has length 48 [2024-09-15 18:50:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:55,027 INFO L474 AbstractCegarLoop]: Abstraction has 957 states and 1298 transitions. [2024-09-15 18:50:55,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2024-09-15 18:50:55,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1298 transitions. [2024-09-15 18:50:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:50:55,028 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:55,028 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:55,041 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-15 18:50:55,229 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-15 18:50:55,229 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:55,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -957060563, now seen corresponding path program 24 times [2024-09-15 18:50:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541169061] [2024-09-15 18:50:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:55,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:50:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 18:50:55,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:50:55,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541169061] [2024-09-15 18:50:55,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541169061] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:50:55,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817055388] [2024-09-15 18:50:55,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:50:55,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:55,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:50:55,411 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) [2024-09-15 18:50:55,424 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-15 18:50:55,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 18:50:55,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:50:55,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:50:55,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:50:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 18:50:55,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 18:50:55,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817055388] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:55,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:55,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-15 18:50:55,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279290251] [2024-09-15 18:50:55,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:55,707 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 18:50:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:55,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 18:50:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:50:55,708 INFO L87 Difference]: Start difference. First operand 957 states and 1298 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:50:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:56,612 INFO L93 Difference]: Finished difference Result 1040 states and 1398 transitions. [2024-09-15 18:50:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:50:56,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-15 18:50:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:56,616 INFO L225 Difference]: With dead ends: 1040 [2024-09-15 18:50:56,616 INFO L226 Difference]: Without dead ends: 988 [2024-09-15 18:50:56,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:50:56,617 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:56,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:50:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2024-09-15 18:50:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 939. [2024-09-15 18:50:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3650963597430408) internal successors, (1275), 934 states have internal predecessors, (1275), 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) [2024-09-15 18:50:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1279 transitions. [2024-09-15 18:50:57,451 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1279 transitions. Word has length 51 [2024-09-15 18:50:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:57,451 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1279 transitions. [2024-09-15 18:50:57,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:50:57,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1279 transitions. [2024-09-15 18:50:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:50:57,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:57,452 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:57,464 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-15 18:50:57,653 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-15 18:50:57,653 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:57,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1426629135, now seen corresponding path program 25 times [2024-09-15 18:50:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:57,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190316246] [2024-09-15 18:50:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:57,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:57,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:50:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-15 18:50:57,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:50:57,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190316246] [2024-09-15 18:50:57,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190316246] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:50:57,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989143262] [2024-09-15 18:50:57,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:50:57,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:57,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:50:57,999 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) [2024-09-15 18:50:58,000 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-15 18:50:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:58,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-15 18:50:58,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:50:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-15 18:50:58,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-15 18:50:58,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989143262] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:58,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:58,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-15 18:50:58,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870636371] [2024-09-15 18:50:58,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:58,871 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:50:58,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:50:58,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:50:58,871 INFO L87 Difference]: Start difference. First operand 939 states and 1279 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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) [2024-09-15 18:51:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:51:07,604 INFO L93 Difference]: Finished difference Result 1388 states and 1845 transitions. [2024-09-15 18:51:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-09-15 18:51:07,604 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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 51 [2024-09-15 18:51:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:51:07,608 INFO L225 Difference]: With dead ends: 1388 [2024-09-15 18:51:07,608 INFO L226 Difference]: Without dead ends: 1286 [2024-09-15 18:51:07,609 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 87 SyntacticMatches, 20 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6656 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1899, Invalid=20751, Unknown=0, NotChecked=0, Total=22650 [2024-09-15 18:51:07,610 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 210 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:51:07,610 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 797 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-15 18:51:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-15 18:51:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 939. [2024-09-15 18:51:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3511777301927195) internal successors, (1262), 934 states have internal predecessors, (1262), 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) [2024-09-15 18:51:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1266 transitions. [2024-09-15 18:51:08,388 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1266 transitions. Word has length 51 [2024-09-15 18:51:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:51:08,388 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1266 transitions. [2024-09-15 18:51:08,388 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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) [2024-09-15 18:51:08,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1266 transitions. [2024-09-15 18:51:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:51:08,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:51:08,389 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:51:08,401 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-15 18:51:08,589 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:08,590 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:51:08,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -693108371, now seen corresponding path program 8 times [2024-09-15 18:51:08,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:51:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80671962] [2024-09-15 18:51:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:51:08,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:51:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:08,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:51:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:51:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:51:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80671962] [2024-09-15 18:51:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80671962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:51:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799024961] [2024-09-15 18:51:08,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:51:08,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:51:08,954 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) [2024-09-15 18:51:08,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-15 18:51:09,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:51:09,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:51:09,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-15 18:51:09,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:51:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-15 18:51:09,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:51:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-15 18:51:09,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799024961] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:51:09,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:51:09,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2024-09-15 18:51:09,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065173869] [2024-09-15 18:51:09,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:51:09,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-15 18:51:09,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:51:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-15 18:51:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2024-09-15 18:51:09,973 INFO L87 Difference]: Start difference. First operand 939 states and 1266 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2024-09-15 18:51:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:51:25,982 INFO L93 Difference]: Finished difference Result 1497 states and 2031 transitions. [2024-09-15 18:51:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2024-09-15 18:51:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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 51 [2024-09-15 18:51:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:51:25,986 INFO L225 Difference]: With dead ends: 1497 [2024-09-15 18:51:25,986 INFO L226 Difference]: Without dead ends: 1375 [2024-09-15 18:51:25,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 84 SyntacticMatches, 22 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32210 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3237, Invalid=82319, Unknown=0, NotChecked=0, Total=85556 [2024-09-15 18:51:25,990 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 405 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 8604 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 8946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 8604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:51:25,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 440 Invalid, 8946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 8604 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-09-15 18:51:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2024-09-15 18:51:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 963. [2024-09-15 18:51:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3392484342379958) internal successors, (1283), 958 states have internal predecessors, (1283), 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) [2024-09-15 18:51:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1287 transitions. [2024-09-15 18:51:26,846 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1287 transitions. Word has length 51 [2024-09-15 18:51:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:51:26,846 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1287 transitions. [2024-09-15 18:51:26,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2024-09-15 18:51:26,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1287 transitions. [2024-09-15 18:51:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:51:26,847 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:51:26,847 INFO L216 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:51:26,859 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-15 18:51:27,048 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:27,048 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:51:27,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash -206398450, now seen corresponding path program 26 times [2024-09-15 18:51:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:51:27,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943578595] [2024-09-15 18:51:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:51:27,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:51:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:27,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:51:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 18:51:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:51:27,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943578595] [2024-09-15 18:51:27,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943578595] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:51:27,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205487494] [2024-09-15 18:51:27,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:51:27,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:51:27,332 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:51:27,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-15 18:51:27,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:51:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:51:27,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-15 18:51:27,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:51:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 18:51:27,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:51:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-15 18:51:27,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205487494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:51:27,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:51:27,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 16] total 45 [2024-09-15 18:51:27,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609188458] [2024-09-15 18:51:27,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:51:27,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-15 18:51:27,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:51:27,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-15 18:51:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:51:27,905 INFO L87 Difference]: Start difference. First operand 963 states and 1287 transitions. Second operand has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:51:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:51:35,397 INFO L93 Difference]: Finished difference Result 1828 states and 2515 transitions. [2024-09-15 18:51:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-09-15 18:51:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-15 18:51:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:51:35,403 INFO L225 Difference]: With dead ends: 1828 [2024-09-15 18:51:35,403 INFO L226 Difference]: Without dead ends: 1398 [2024-09-15 18:51:35,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7225 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1455, Invalid=23351, Unknown=0, NotChecked=0, Total=24806 [2024-09-15 18:51:35,405 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 157 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:51:35,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 2003 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-15 18:51:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2024-09-15 18:51:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1028. [2024-09-15 18:51:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1023 states have (on average 1.3870967741935485) internal successors, (1419), 1023 states have internal predecessors, (1419), 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) [2024-09-15 18:51:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1423 transitions. [2024-09-15 18:51:36,304 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1423 transitions. Word has length 51 [2024-09-15 18:51:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:51:36,304 INFO L474 AbstractCegarLoop]: Abstraction has 1028 states and 1423 transitions. [2024-09-15 18:51:36,304 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:51:36,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1423 transitions. [2024-09-15 18:51:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 18:51:36,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:51:36,306 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:51:36,318 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-15 18:51:36,506 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-15 18:51:36,506 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:51:36,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash -700722420, now seen corresponding path program 27 times [2024-09-15 18:51:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:51:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146617184] [2024-09-15 18:51:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:51:36,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:51:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:36,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:51:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-15 18:51:36,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:51:36,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146617184] [2024-09-15 18:51:36,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146617184] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:51:36,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370634768] [2024-09-15 18:51:36,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:51:36,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:36,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:51:36,864 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:51:36,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-15 18:51:37,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 18:51:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:51:37,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-15 18:51:37,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:51:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-15 18:51:37,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:51:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-15 18:51:37,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370634768] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:51:37,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:51:37,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2024-09-15 18:51:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137255803] [2024-09-15 18:51:37,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:51:37,427 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 18:51:37,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:51:37,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 18:51:37,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:51:37,428 INFO L87 Difference]: Start difference. First operand 1028 states and 1423 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:51:40,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:51:43,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:51:47,309 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 []