./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 18:21:14,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:21:14,963 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:21:14,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:21:14,974 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:21:15,002 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:21:15,002 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:21:15,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:21:15,003 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:21:15,004 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:21:15,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:21:15,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:21:15,005 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:21:15,005 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:21:15,006 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:21:15,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:21:15,006 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:21:15,007 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:21:15,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:21:15,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:21:15,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:21:15,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:21:15,009 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:21:15,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:21:15,009 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:21:15,010 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:21:15,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:21:15,010 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:21:15,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:21:15,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:21:15,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:21:15,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:21:15,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:21:15,012 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:21:15,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:21:15,013 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:21:15,013 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:21:15,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:21:15,014 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:21:15,014 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:21:15,014 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:21:15,015 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:21:15,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:21:15,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:21:15,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:21:15,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:21:15,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:21:15,313 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:21:15,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-17 18:21:16,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:21:17,096 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:21:17,096 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-17 18:21:17,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/af0fdfe68/a6734cfc9ba347e49838b7892bdf493a/FLAG3d23c1171 [2024-09-17 18:21:17,118 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/af0fdfe68/a6734cfc9ba347e49838b7892bdf493a [2024-09-17 18:21:17,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:21:17,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:21:17,123 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:21:17,123 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:21:17,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:21:17,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1101a8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17, skipping insertion in model container [2024-09-17 18:21:17,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,146 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:21:17,276 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] [2024-09-17 18:21:17,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:21:17,324 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:21:17,335 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] [2024-09-17 18:21:17,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:21:17,357 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:21:17,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17 WrapperNode [2024-09-17 18:21:17,358 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:21:17,359 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:21:17,359 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:21:17,359 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:21:17,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,372 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,379 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:21:17,379 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:21:17,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:21:17,380 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:21:17,380 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:21:17,389 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,391 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,409 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]. [2024-09-17 18:21:17,411 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,412 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,430 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:21:17,431 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:21:17,431 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:21:17,435 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:21:17,436 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (1/1) ... [2024-09-17 18:21:17,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:21:17,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:17,508 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) [2024-09-17 18:21:17,521 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 [2024-09-17 18:21:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:21:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:21:17,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:21:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:21:17,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:21:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:21:17,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:21:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:21:17,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:21:17,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:21:17,651 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:21:17,654 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:21:17,793 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-17 18:21:17,794 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:21:17,813 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:21:17,814 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-17 18:21:17,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:21:17 BoogieIcfgContainer [2024-09-17 18:21:17,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:21:17,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:21:17,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:21:17,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:21:17,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:21:17" (1/3) ... [2024-09-17 18:21:17,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@facf04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:21:17, skipping insertion in model container [2024-09-17 18:21:17,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:21:17" (2/3) ... [2024-09-17 18:21:17,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@facf04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:21:17, skipping insertion in model container [2024-09-17 18:21:17,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:21:17" (3/3) ... [2024-09-17 18:21:17,822 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2024-09-17 18:21:17,838 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:21:17,838 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:21:17,887 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:21:17,893 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;@1eba01d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:21:17,894 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:21:17,898 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) [2024-09-17 18:21:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-17 18:21:17,904 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:17,905 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:17,906 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:17,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -356520028, now seen corresponding path program 1 times [2024-09-17 18:21:17,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540447030] [2024-09-17 18:21:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:18,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:18,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540447030] [2024-09-17 18:21:18,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540447030] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:21:18,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:21:18,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 18:21:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570749029] [2024-09-17 18:21:18,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:21:18,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 18:21:18,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 18:21:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:21:18,177 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) [2024-09-17 18:21:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:18,217 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2024-09-17 18:21:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 18:21:18,221 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 [2024-09-17 18:21:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:18,227 INFO L225 Difference]: With dead ends: 38 [2024-09-17 18:21:18,227 INFO L226 Difference]: Without dead ends: 16 [2024-09-17 18:21:18,230 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 [2024-09-17 18:21:18,236 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 [2024-09-17 18:21:18,239 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] [2024-09-17 18:21:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-17 18:21:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-17 18:21:18,271 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) [2024-09-17 18:21:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-09-17 18:21:18,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2024-09-17 18:21:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:18,275 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-09-17 18:21:18,275 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) [2024-09-17 18:21:18,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-09-17 18:21:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-17 18:21:18,277 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:18,278 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:18,278 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:21:18,279 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:18,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 315017388, now seen corresponding path program 1 times [2024-09-17 18:21:18,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76396243] [2024-09-17 18:21:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:18,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:18,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76396243] [2024-09-17 18:21:18,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76396243] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:21:18,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:21:18,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:21:18,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897151737] [2024-09-17 18:21:18,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:21:18,546 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:21:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:21:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:21:18,548 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) [2024-09-17 18:21:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:18,624 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-17 18:21:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:21:18,624 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 [2024-09-17 18:21:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:18,625 INFO L225 Difference]: With dead ends: 33 [2024-09-17 18:21:18,626 INFO L226 Difference]: Without dead ends: 22 [2024-09-17 18:21:18,626 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 [2024-09-17 18:21:18,627 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 [2024-09-17 18:21:18,631 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] [2024-09-17 18:21:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-17 18:21:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-17 18:21:18,639 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) [2024-09-17 18:21:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-09-17 18:21:18,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2024-09-17 18:21:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:18,640 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-09-17 18:21:18,640 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) [2024-09-17 18:21:18,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-09-17 18:21:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-17 18:21:18,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:18,642 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:18,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:21:18,642 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:18,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1680996671, now seen corresponding path program 1 times [2024-09-17 18:21:18,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:18,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449181895] [2024-09-17 18:21:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:18,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449181895] [2024-09-17 18:21:18,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449181895] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:21:18,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:21:18,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 18:21:18,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297861891] [2024-09-17 18:21:18,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:21:18,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 18:21:18,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 18:21:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:21:18,688 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) [2024-09-17 18:21:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:18,706 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-17 18:21:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 18:21:18,707 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 [2024-09-17 18:21:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:18,707 INFO L225 Difference]: With dead ends: 34 [2024-09-17 18:21:18,708 INFO L226 Difference]: Without dead ends: 27 [2024-09-17 18:21:18,708 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 [2024-09-17 18:21:18,709 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 [2024-09-17 18:21:18,710 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] [2024-09-17 18:21:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-17 18:21:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-17 18:21:18,717 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) [2024-09-17 18:21:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-09-17 18:21:18,718 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2024-09-17 18:21:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:18,718 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-09-17 18:21:18,719 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) [2024-09-17 18:21:18,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-09-17 18:21:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-17 18:21:18,720 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:18,720 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:18,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 18:21:18,721 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:18,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1211142226, now seen corresponding path program 1 times [2024-09-17 18:21:18,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:18,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354153554] [2024-09-17 18:21:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:18,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:18,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:18,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354153554] [2024-09-17 18:21:18,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354153554] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:21:18,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:21:18,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 18:21:18,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940588130] [2024-09-17 18:21:18,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:21:18,768 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 18:21:18,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 18:21:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:21:18,769 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) [2024-09-17 18:21:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:18,797 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-17 18:21:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 18:21:18,798 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 [2024-09-17 18:21:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:18,799 INFO L225 Difference]: With dead ends: 40 [2024-09-17 18:21:18,799 INFO L226 Difference]: Without dead ends: 31 [2024-09-17 18:21:18,799 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 [2024-09-17 18:21:18,800 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 [2024-09-17 18:21:18,801 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] [2024-09-17 18:21:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-17 18:21:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-17 18:21:18,808 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) [2024-09-17 18:21:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2024-09-17 18:21:18,809 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 16 [2024-09-17 18:21:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:18,810 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2024-09-17 18:21:18,810 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) [2024-09-17 18:21:18,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-09-17 18:21:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-17 18:21:18,811 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:18,811 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:18,812 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-17 18:21:18,812 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:18,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1994481964, now seen corresponding path program 1 times [2024-09-17 18:21:18,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:18,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958727012] [2024-09-17 18:21:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:18,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:18,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958727012] [2024-09-17 18:21:18,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958727012] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:21:18,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:21:18,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 18:21:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337623083] [2024-09-17 18:21:18,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:21:18,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 18:21:18,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:18,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 18:21:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 18:21:18,882 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) [2024-09-17 18:21:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:18,915 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-17 18:21:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 18:21:18,915 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 [2024-09-17 18:21:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:18,916 INFO L225 Difference]: With dead ends: 39 [2024-09-17 18:21:18,916 INFO L226 Difference]: Without dead ends: 27 [2024-09-17 18:21:18,917 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 [2024-09-17 18:21:18,918 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 [2024-09-17 18:21:18,918 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] [2024-09-17 18:21:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-17 18:21:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-17 18:21:18,923 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) [2024-09-17 18:21:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-09-17 18:21:18,924 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2024-09-17 18:21:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:18,925 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-09-17 18:21:18,925 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) [2024-09-17 18:21:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-09-17 18:21:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-17 18:21:18,926 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:18,926 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:18,927 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-17 18:21:18,927 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:18,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1135312256, now seen corresponding path program 1 times [2024-09-17 18:21:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:18,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544937699] [2024-09-17 18:21:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:19,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 18:21:19,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544937699] [2024-09-17 18:21:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544937699] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054386877] [2024-09-17 18:21:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:19,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:19,134 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) [2024-09-17 18:21:19,138 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:21:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:19,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:21:19,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 18:21:19,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 18:21:19,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054386877] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:19,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:21:19,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-17 18:21:19,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611931827] [2024-09-17 18:21:19,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:21:19,302 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 18:21:19,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:19,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 18:21:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:21:19,306 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) [2024-09-17 18:21:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:19,343 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-17 18:21:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 18:21:19,344 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 [2024-09-17 18:21:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:19,345 INFO L225 Difference]: With dead ends: 34 [2024-09-17 18:21:19,345 INFO L226 Difference]: Without dead ends: 24 [2024-09-17 18:21:19,345 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:21:19,346 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 [2024-09-17 18:21:19,346 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] [2024-09-17 18:21:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-17 18:21:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-17 18:21:19,355 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) [2024-09-17 18:21:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-09-17 18:21:19,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 18 [2024-09-17 18:21:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:19,357 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-09-17 18:21:19,357 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) [2024-09-17 18:21:19,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-09-17 18:21:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-17 18:21:19,360 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:19,360 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:19,378 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 18:21:19,561 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 [2024-09-17 18:21:19,561 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:19,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:19,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1896560672, now seen corresponding path program 1 times [2024-09-17 18:21:19,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:19,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848679057] [2024-09-17 18:21:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:19,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:19,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 18:21:19,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848679057] [2024-09-17 18:21:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848679057] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60247656] [2024-09-17 18:21:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:19,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:19,652 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) [2024-09-17 18:21:19,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:21:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:19,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:21:19,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:19,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 18:21:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60247656] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:19,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:21:19,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-17 18:21:19,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269799482] [2024-09-17 18:21:19,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:21:19,764 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 18:21:19,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:19,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 18:21:19,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:21:19,765 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) [2024-09-17 18:21:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:19,792 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-09-17 18:21:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 18:21:19,793 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 [2024-09-17 18:21:19,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:19,794 INFO L225 Difference]: With dead ends: 29 [2024-09-17 18:21:19,794 INFO L226 Difference]: Without dead ends: 21 [2024-09-17 18:21:19,794 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 [2024-09-17 18:21:19,795 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 [2024-09-17 18:21:19,795 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] [2024-09-17 18:21:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-17 18:21:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-17 18:21:19,798 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) [2024-09-17 18:21:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-17 18:21:19,803 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2024-09-17 18:21:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:19,804 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-17 18:21:19,804 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) [2024-09-17 18:21:19,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-17 18:21:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 18:21:19,805 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:19,805 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:19,822 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:21:20,005 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 [2024-09-17 18:21:20,007 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:20,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash -399434628, now seen corresponding path program 1 times [2024-09-17 18:21:20,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:20,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226332037] [2024-09-17 18:21:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:20,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:20,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:20,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:20,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226332037] [2024-09-17 18:21:20,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226332037] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:20,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158235744] [2024-09-17 18:21:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:20,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:20,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:20,162 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) [2024-09-17 18:21:20,166 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:21:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:20,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:21:20,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:20,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158235744] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:20,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-17 18:21:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120575705] [2024-09-17 18:21:20,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:20,332 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-17 18:21:20,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-17 18:21:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:21:20,334 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) [2024-09-17 18:21:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:20,709 INFO L93 Difference]: Finished difference Result 77 states and 116 transitions. [2024-09-17 18:21:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:21:20,710 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 [2024-09-17 18:21:20,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:20,712 INFO L225 Difference]: With dead ends: 77 [2024-09-17 18:21:20,712 INFO L226 Difference]: Without dead ends: 65 [2024-09-17 18:21:20,712 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:21:20,716 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 [2024-09-17 18:21:20,717 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] [2024-09-17 18:21:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-17 18:21:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 32. [2024-09-17 18:21:20,732 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) [2024-09-17 18:21:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-17 18:21:20,734 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2024-09-17 18:21:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:20,734 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-17 18:21:20,735 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) [2024-09-17 18:21:20,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-17 18:21:20,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 18:21:20,736 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:20,736 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:20,754 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:21:20,940 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 [2024-09-17 18:21:20,941 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:20,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263027, now seen corresponding path program 1 times [2024-09-17 18:21:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52170938] [2024-09-17 18:21:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:21,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 18:21:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:21,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52170938] [2024-09-17 18:21:21,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52170938] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423656861] [2024-09-17 18:21:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:21,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:21,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:21,070 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) [2024-09-17 18:21:21,076 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:21:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:21,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:21:21,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:21:21,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:21:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423656861] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:21,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-17 18:21:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067180734] [2024-09-17 18:21:21,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:21,177 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:21:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:21:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:21:21,178 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) [2024-09-17 18:21:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:21,231 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2024-09-17 18:21:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:21:21,231 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 [2024-09-17 18:21:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:21,232 INFO L225 Difference]: With dead ends: 66 [2024-09-17 18:21:21,232 INFO L226 Difference]: Without dead ends: 54 [2024-09-17 18:21:21,233 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 [2024-09-17 18:21:21,233 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 [2024-09-17 18:21:21,234 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] [2024-09-17 18:21:21,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-17 18:21:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-09-17 18:21:21,246 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) [2024-09-17 18:21:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-09-17 18:21:21,247 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 19 [2024-09-17 18:21:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:21,247 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-09-17 18:21:21,247 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) [2024-09-17 18:21:21,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-09-17 18:21:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-17 18:21:21,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:21,248 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] [2024-09-17 18:21:21,267 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:21,452 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 [2024-09-17 18:21:21,453 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:21,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash 537966210, now seen corresponding path program 1 times [2024-09-17 18:21:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557541929] [2024-09-17 18:21:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:21,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:21,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:21,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557541929] [2024-09-17 18:21:21,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557541929] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:21,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125247330] [2024-09-17 18:21:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:21,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:21,563 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) [2024-09-17 18:21:21,571 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:21:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:21,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-17 18:21:21,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:21,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125247330] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:21,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:21,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-09-17 18:21:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258323304] [2024-09-17 18:21:21,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:21,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:21:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:21:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:21:21,717 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) [2024-09-17 18:21:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:21,787 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-09-17 18:21:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:21:21,788 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 [2024-09-17 18:21:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:21,788 INFO L225 Difference]: With dead ends: 62 [2024-09-17 18:21:21,789 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 18:21:21,789 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 [2024-09-17 18:21:21,790 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 [2024-09-17 18:21:21,790 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] [2024-09-17 18:21:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 18:21:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-09-17 18:21:21,800 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) [2024-09-17 18:21:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2024-09-17 18:21:21,801 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 20 [2024-09-17 18:21:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:21,802 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2024-09-17 18:21:21,802 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) [2024-09-17 18:21:21,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2024-09-17 18:21:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-17 18:21:21,803 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:21,803 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:21,820 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:21:22,007 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 [2024-09-17 18:21:22,008 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:22,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash 548739116, now seen corresponding path program 2 times [2024-09-17 18:21:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:22,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006872812] [2024-09-17 18:21:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:22,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:21:22,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:22,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006872812] [2024-09-17 18:21:22,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006872812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:22,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378101812] [2024-09-17 18:21:22,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:21:22,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:22,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:22,131 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) [2024-09-17 18:21:22,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:21:22,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:21:22,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:22,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:21:22,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:21:22,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:21:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378101812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:22,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:22,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-17 18:21:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633991974] [2024-09-17 18:21:22,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:22,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-17 18:21:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-17 18:21:22,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:21:22,299 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) [2024-09-17 18:21:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:22,482 INFO L93 Difference]: Finished difference Result 96 states and 141 transitions. [2024-09-17 18:21:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:21:22,483 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 [2024-09-17 18:21:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:22,484 INFO L225 Difference]: With dead ends: 96 [2024-09-17 18:21:22,484 INFO L226 Difference]: Without dead ends: 68 [2024-09-17 18:21:22,484 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 [2024-09-17 18:21:22,485 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 [2024-09-17 18:21:22,486 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] [2024-09-17 18:21:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-17 18:21:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2024-09-17 18:21:22,504 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) [2024-09-17 18:21:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-17 18:21:22,505 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 21 [2024-09-17 18:21:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:22,505 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-17 18:21:22,506 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) [2024-09-17 18:21:22,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-17 18:21:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-17 18:21:22,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:22,507 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:22,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:21:22,708 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 [2024-09-17 18:21:22,709 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:22,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:22,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1383500575, now seen corresponding path program 3 times [2024-09-17 18:21:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522263173] [2024-09-17 18:21:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:22,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:22,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522263173] [2024-09-17 18:21:22,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522263173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:22,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797162126] [2024-09-17 18:21:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:21:22,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:22,873 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) [2024-09-17 18:21:22,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:21:22,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-17 18:21:22,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:22,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 18:21:22,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:21:22,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:21:23,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797162126] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:23,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:23,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-17 18:21:23,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128275979] [2024-09-17 18:21:23,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:23,047 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 18:21:23,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 18:21:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:21:23,049 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) [2024-09-17 18:21:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:23,396 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2024-09-17 18:21:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:21:23,396 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 [2024-09-17 18:21:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:23,397 INFO L225 Difference]: With dead ends: 84 [2024-09-17 18:21:23,397 INFO L226 Difference]: Without dead ends: 67 [2024-09-17 18:21:23,398 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:21:23,398 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 [2024-09-17 18:21:23,399 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] [2024-09-17 18:21:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-17 18:21:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-09-17 18:21:23,414 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) [2024-09-17 18:21:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-17 18:21:23,415 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 22 [2024-09-17 18:21:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:23,416 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-17 18:21:23,416 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) [2024-09-17 18:21:23,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-17 18:21:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-17 18:21:23,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:23,417 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] [2024-09-17 18:21:23,436 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:21:23,617 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 [2024-09-17 18:21:23,618 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:23,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1003223996, now seen corresponding path program 2 times [2024-09-17 18:21:23,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:23,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709680571] [2024-09-17 18:21:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:23,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 18:21:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709680571] [2024-09-17 18:21:23,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709680571] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290500842] [2024-09-17 18:21:23,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:21:23,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:23,722 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) [2024-09-17 18:21:23,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:21:23,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:21:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:23,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:21:23,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:23,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:21:24,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290500842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:24,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:24,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 21 [2024-09-17 18:21:24,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296665549] [2024-09-17 18:21:24,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:24,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:21:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:21:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:21:24,073 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) [2024-09-17 18:21:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:24,791 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2024-09-17 18:21:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-17 18:21:24,791 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 [2024-09-17 18:21:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:24,792 INFO L225 Difference]: With dead ends: 147 [2024-09-17 18:21:24,792 INFO L226 Difference]: Without dead ends: 108 [2024-09-17 18:21:24,793 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:21:24,794 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 [2024-09-17 18:21:24,794 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] [2024-09-17 18:21:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-17 18:21:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2024-09-17 18:21:24,817 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) [2024-09-17 18:21:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2024-09-17 18:21:24,817 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 23 [2024-09-17 18:21:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:24,818 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2024-09-17 18:21:24,818 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) [2024-09-17 18:21:24,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2024-09-17 18:21:24,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 18:21:24,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:24,819 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:24,835 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:21:25,020 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 [2024-09-17 18:21:25,020 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:25,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash 411216348, now seen corresponding path program 4 times [2024-09-17 18:21:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:25,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120720463] [2024-09-17 18:21:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:25,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:25,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:25,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120720463] [2024-09-17 18:21:25,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120720463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:25,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182085131] [2024-09-17 18:21:25,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:21:25,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:25,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:25,184 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) [2024-09-17 18:21:25,185 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:21:25,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:21:25,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:25,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:21:25,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 18:21:25,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 18:21:25,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182085131] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:25,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:25,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-17 18:21:25,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597929981] [2024-09-17 18:21:25,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:25,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:21:25,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:25,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:21:25,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:21:25,417 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) [2024-09-17 18:21:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:26,278 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-17 18:21:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-17 18:21:26,279 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 [2024-09-17 18:21:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:26,280 INFO L225 Difference]: With dead ends: 123 [2024-09-17 18:21:26,280 INFO L226 Difference]: Without dead ends: 96 [2024-09-17 18:21:26,281 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:21:26,283 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:26,283 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 139 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:21:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-17 18:21:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2024-09-17 18:21:26,305 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) [2024-09-17 18:21:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-17 18:21:26,306 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 25 [2024-09-17 18:21:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:26,306 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-17 18:21:26,306 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) [2024-09-17 18:21:26,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-17 18:21:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 18:21:26,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:26,307 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] [2024-09-17 18:21:26,329 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 18:21:26,513 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 [2024-09-17 18:21:26,514 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:26,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:26,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1940516302, now seen corresponding path program 3 times [2024-09-17 18:21:26,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:26,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628461329] [2024-09-17 18:21:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:26,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:26,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 18:21:26,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628461329] [2024-09-17 18:21:26,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628461329] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979770996] [2024-09-17 18:21:26,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:21:26,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:26,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:26,614 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) [2024-09-17 18:21:26,633 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:21:26,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:21:26,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:26,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-17 18:21:26,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:26,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 18:21:26,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979770996] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:26,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:26,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 24 [2024-09-17 18:21:26,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536974240] [2024-09-17 18:21:26,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:26,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 18:21:26,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:26,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 18:21:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:21:26,987 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) [2024-09-17 18:21:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:27,990 INFO L93 Difference]: Finished difference Result 171 states and 236 transitions. [2024-09-17 18:21:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-17 18:21:27,991 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 [2024-09-17 18:21:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:27,992 INFO L225 Difference]: With dead ends: 171 [2024-09-17 18:21:27,992 INFO L226 Difference]: Without dead ends: 134 [2024-09-17 18:21:27,993 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:21:27,994 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-09-17 18:21:27,994 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] [2024-09-17 18:21:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-17 18:21:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2024-09-17 18:21:28,033 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) [2024-09-17 18:21:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-17 18:21:28,034 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 25 [2024-09-17 18:21:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:28,035 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-17 18:21:28,035 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) [2024-09-17 18:21:28,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-17 18:21:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-17 18:21:28,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:28,036 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] [2024-09-17 18:21:28,055 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:28,237 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 [2024-09-17 18:21:28,237 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:28,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash 712565185, now seen corresponding path program 4 times [2024-09-17 18:21:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:28,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666292534] [2024-09-17 18:21:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:28,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 18:21:28,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:28,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666292534] [2024-09-17 18:21:28,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666292534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735087975] [2024-09-17 18:21:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:21:28,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:28,340 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) [2024-09-17 18:21:28,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 18:21:28,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:21:28,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:28,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:21:28,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 18:21:28,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-17 18:21:28,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735087975] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:28,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:28,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-17 18:21:28,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141319917] [2024-09-17 18:21:28,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:28,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:21:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:21:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:21:28,467 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) [2024-09-17 18:21:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:28,518 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2024-09-17 18:21:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:21:28,519 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 [2024-09-17 18:21:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:28,520 INFO L225 Difference]: With dead ends: 125 [2024-09-17 18:21:28,520 INFO L226 Difference]: Without dead ends: 99 [2024-09-17 18:21:28,520 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 [2024-09-17 18:21:28,521 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 [2024-09-17 18:21:28,521 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] [2024-09-17 18:21:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-17 18:21:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-17 18:21:28,551 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) [2024-09-17 18:21:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2024-09-17 18:21:28,553 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 26 [2024-09-17 18:21:28,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:28,553 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2024-09-17 18:21:28,553 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) [2024-09-17 18:21:28,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2024-09-17 18:21:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-17 18:21:28,556 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:28,556 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] [2024-09-17 18:21:28,573 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:28,756 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 [2024-09-17 18:21:28,757 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:28,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:28,758 INFO L85 PathProgramCache]: Analyzing trace with hash -133051136, now seen corresponding path program 5 times [2024-09-17 18:21:28,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:28,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928415654] [2024-09-17 18:21:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:28,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:28,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 18:21:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928415654] [2024-09-17 18:21:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928415654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118517101] [2024-09-17 18:21:28,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:21:28,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:28,893 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) [2024-09-17 18:21:28,895 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 18:21:28,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-17 18:21:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:28,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:21:28,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:21:28,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-17 18:21:29,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118517101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:29,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:29,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-17 18:21:29,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254622163] [2024-09-17 18:21:29,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:29,078 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:21:29,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:21:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:21:29,079 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) [2024-09-17 18:21:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:29,386 INFO L93 Difference]: Finished difference Result 216 states and 305 transitions. [2024-09-17 18:21:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:21:29,386 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 [2024-09-17 18:21:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:29,388 INFO L225 Difference]: With dead ends: 216 [2024-09-17 18:21:29,388 INFO L226 Difference]: Without dead ends: 173 [2024-09-17 18:21:29,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:21:29,389 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:29,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 268 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:21:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-17 18:21:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2024-09-17 18:21:29,416 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) [2024-09-17 18:21:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2024-09-17 18:21:29,417 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 26 [2024-09-17 18:21:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:29,418 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2024-09-17 18:21:29,418 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) [2024-09-17 18:21:29,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2024-09-17 18:21:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-17 18:21:29,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:29,419 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:29,435 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:29,623 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 [2024-09-17 18:21:29,624 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1263484460, now seen corresponding path program 5 times [2024-09-17 18:21:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308016166] [2024-09-17 18:21:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:29,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 18:21:29,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308016166] [2024-09-17 18:21:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308016166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225520339] [2024-09-17 18:21:29,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:21:29,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:29,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:29,752 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) [2024-09-17 18:21:29,754 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 18:21:29,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-17 18:21:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:29,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:21:29,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:29,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:21:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225520339] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:29,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:29,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 5] total 21 [2024-09-17 18:21:29,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102607247] [2024-09-17 18:21:29,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:29,981 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:21:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:21:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:21:29,982 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) [2024-09-17 18:21:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:30,935 INFO L93 Difference]: Finished difference Result 229 states and 321 transitions. [2024-09-17 18:21:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-17 18:21:30,936 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 [2024-09-17 18:21:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:30,937 INFO L225 Difference]: With dead ends: 229 [2024-09-17 18:21:30,937 INFO L226 Difference]: Without dead ends: 204 [2024-09-17 18:21:30,938 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:21:30,939 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:30,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 319 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:21:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-09-17 18:21:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2024-09-17 18:21:31,014 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) [2024-09-17 18:21:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2024-09-17 18:21:31,019 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 27 [2024-09-17 18:21:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:31,019 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2024-09-17 18:21:31,019 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) [2024-09-17 18:21:31,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2024-09-17 18:21:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-17 18:21:31,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:31,021 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:31,052 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-17 18:21:31,222 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 [2024-09-17 18:21:31,223 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:31,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -695293183, now seen corresponding path program 6 times [2024-09-17 18:21:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714755857] [2024-09-17 18:21:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:31,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:31,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:31,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714755857] [2024-09-17 18:21:31,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714755857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:31,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488872558] [2024-09-17 18:21:31,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:21:31,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:31,674 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) [2024-09-17 18:21:31,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 18:21:31,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-17 18:21:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:31,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:21:31,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-17 18:21:31,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-17 18:21:31,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488872558] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:31,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:31,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-17 18:21:31,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136569921] [2024-09-17 18:21:31,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:31,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:21:31,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:21:31,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:21:31,987 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) [2024-09-17 18:21:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:33,369 INFO L93 Difference]: Finished difference Result 200 states and 273 transitions. [2024-09-17 18:21:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-17 18:21:33,369 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 [2024-09-17 18:21:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:33,371 INFO L225 Difference]: With dead ends: 200 [2024-09-17 18:21:33,371 INFO L226 Difference]: Without dead ends: 170 [2024-09-17 18:21:33,373 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=440, Invalid=4962, Unknown=0, NotChecked=0, Total=5402 [2024-09-17 18:21:33,374 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:33,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 168 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:21:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-17 18:21:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2024-09-17 18:21:33,413 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) [2024-09-17 18:21:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2024-09-17 18:21:33,414 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 28 [2024-09-17 18:21:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:33,414 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2024-09-17 18:21:33,414 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) [2024-09-17 18:21:33,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2024-09-17 18:21:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-17 18:21:33,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:33,416 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] [2024-09-17 18:21:33,434 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:33,620 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 [2024-09-17 18:21:33,621 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:33,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2037353101, now seen corresponding path program 6 times [2024-09-17 18:21:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:33,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048205208] [2024-09-17 18:21:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:33,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:21:33,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:33,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048205208] [2024-09-17 18:21:33,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048205208] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:33,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667066925] [2024-09-17 18:21:33,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:21:33,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:33,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:33,802 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) [2024-09-17 18:21:33,810 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 18:21:33,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-17 18:21:33,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:33,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:21:33,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:21:33,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:21:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667066925] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:34,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:34,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-17 18:21:34,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724291167] [2024-09-17 18:21:34,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:34,037 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:21:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:34,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:21:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:21:34,038 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) [2024-09-17 18:21:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:34,244 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2024-09-17 18:21:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:21:34,244 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 [2024-09-17 18:21:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:34,246 INFO L225 Difference]: With dead ends: 165 [2024-09-17 18:21:34,246 INFO L226 Difference]: Without dead ends: 151 [2024-09-17 18:21:34,246 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:21:34,247 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:34,248 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:21:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-17 18:21:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-09-17 18:21:34,292 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) [2024-09-17 18:21:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 192 transitions. [2024-09-17 18:21:34,293 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 192 transitions. Word has length 29 [2024-09-17 18:21:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:34,293 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 192 transitions. [2024-09-17 18:21:34,294 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) [2024-09-17 18:21:34,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 192 transitions. [2024-09-17 18:21:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-17 18:21:34,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:34,294 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] [2024-09-17 18:21:34,314 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-17 18:21:34,495 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 [2024-09-17 18:21:34,495 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:34,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash 947704670, now seen corresponding path program 7 times [2024-09-17 18:21:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:34,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962212720] [2024-09-17 18:21:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:34,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 18:21:34,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:34,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962212720] [2024-09-17 18:21:34,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962212720] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:34,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545831050] [2024-09-17 18:21:34,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:21:34,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:34,746 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) [2024-09-17 18:21:34,758 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 18:21:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:34,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:21:34,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:21:34,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 18:21:35,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545831050] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:35,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:35,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 8] total 23 [2024-09-17 18:21:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280996285] [2024-09-17 18:21:35,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:35,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:21:35,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:21:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:21:35,064 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) [2024-09-17 18:21:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:36,657 INFO L93 Difference]: Finished difference Result 302 states and 406 transitions. [2024-09-17 18:21:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-17 18:21:36,658 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 [2024-09-17 18:21:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:36,659 INFO L225 Difference]: With dead ends: 302 [2024-09-17 18:21:36,659 INFO L226 Difference]: Without dead ends: 254 [2024-09-17 18:21:36,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 18:21:36,661 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:36,667 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 481 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:21:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-17 18:21:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2024-09-17 18:21:36,752 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) [2024-09-17 18:21:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2024-09-17 18:21:36,753 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 29 [2024-09-17 18:21:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:36,753 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2024-09-17 18:21:36,753 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) [2024-09-17 18:21:36,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2024-09-17 18:21:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-17 18:21:36,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:36,755 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:36,770 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:36,959 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 [2024-09-17 18:21:36,960 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:36,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1065772992, now seen corresponding path program 2 times [2024-09-17 18:21:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281916459] [2024-09-17 18:21:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:37,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-17 18:21:37,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281916459] [2024-09-17 18:21:37,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281916459] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665897832] [2024-09-17 18:21:37,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:21:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:37,118 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) [2024-09-17 18:21:37,122 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 18:21:37,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:21:37,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:37,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:21:37,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-17 18:21:37,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-17 18:21:37,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665897832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:37,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:37,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-17 18:21:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735573167] [2024-09-17 18:21:37,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:37,431 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:21:37,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:21:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:21:37,433 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) [2024-09-17 18:21:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:38,578 INFO L93 Difference]: Finished difference Result 231 states and 297 transitions. [2024-09-17 18:21:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-17 18:21:38,579 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 [2024-09-17 18:21:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:38,584 INFO L225 Difference]: With dead ends: 231 [2024-09-17 18:21:38,584 INFO L226 Difference]: Without dead ends: 197 [2024-09-17 18:21:38,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:21:38,585 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:38,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:21:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-17 18:21:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2024-09-17 18:21:38,648 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) [2024-09-17 18:21:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2024-09-17 18:21:38,649 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 30 [2024-09-17 18:21:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:38,650 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2024-09-17 18:21:38,650 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) [2024-09-17 18:21:38,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2024-09-17 18:21:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-17 18:21:38,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:38,651 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] [2024-09-17 18:21:38,666 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:38,851 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 [2024-09-17 18:21:38,852 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:38,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:38,853 INFO L85 PathProgramCache]: Analyzing trace with hash -850750864, now seen corresponding path program 8 times [2024-09-17 18:21:38,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:38,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430004064] [2024-09-17 18:21:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:39,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:21:39,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:39,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430004064] [2024-09-17 18:21:39,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430004064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:39,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143420535] [2024-09-17 18:21:39,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:21:39,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:39,047 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) [2024-09-17 18:21:39,055 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 18:21:39,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:21:39,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:39,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-17 18:21:39,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:21:39,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:21:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143420535] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:39,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 12] total 30 [2024-09-17 18:21:39,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640126327] [2024-09-17 18:21:39,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:39,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 18:21:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 18:21:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:21:39,526 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) [2024-09-17 18:21:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:41,792 INFO L93 Difference]: Finished difference Result 324 states and 427 transitions. [2024-09-17 18:21:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-17 18:21:41,793 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 [2024-09-17 18:21:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:41,794 INFO L225 Difference]: With dead ends: 324 [2024-09-17 18:21:41,794 INFO L226 Difference]: Without dead ends: 249 [2024-09-17 18:21:41,796 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2024-09-17 18:21:41,797 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:41,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 596 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:21:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-09-17 18:21:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 171. [2024-09-17 18:21:41,851 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) [2024-09-17 18:21:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2024-09-17 18:21:41,852 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 30 [2024-09-17 18:21:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:41,852 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2024-09-17 18:21:41,853 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) [2024-09-17 18:21:41,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2024-09-17 18:21:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 18:21:41,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:41,854 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] [2024-09-17 18:21:41,869 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-17 18:21:42,057 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 [2024-09-17 18:21:42,058 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:42,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1118269741, now seen corresponding path program 9 times [2024-09-17 18:21:42,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:42,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176021708] [2024-09-17 18:21:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:42,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:42,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 18:21:42,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:42,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176021708] [2024-09-17 18:21:42,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176021708] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:42,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197530729] [2024-09-17 18:21:42,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:21:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:42,188 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) [2024-09-17 18:21:42,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 18:21:42,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:21:42,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:42,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:21:42,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 18:21:42,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 18:21:42,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197530729] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:42,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:42,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-17 18:21:42,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301766988] [2024-09-17 18:21:42,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:42,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:21:42,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:21:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:21:42,322 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) [2024-09-17 18:21:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:42,416 INFO L93 Difference]: Finished difference Result 187 states and 244 transitions. [2024-09-17 18:21:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:21:42,417 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 [2024-09-17 18:21:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:42,419 INFO L225 Difference]: With dead ends: 187 [2024-09-17 18:21:42,419 INFO L226 Difference]: Without dead ends: 159 [2024-09-17 18:21:42,420 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 [2024-09-17 18:21:42,420 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 [2024-09-17 18:21:42,421 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] [2024-09-17 18:21:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-17 18:21:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-09-17 18:21:42,502 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) [2024-09-17 18:21:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2024-09-17 18:21:42,503 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 31 [2024-09-17 18:21:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:42,503 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2024-09-17 18:21:42,503 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) [2024-09-17 18:21:42,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2024-09-17 18:21:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 18:21:42,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:42,504 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:42,521 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-17 18:21:42,708 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 [2024-09-17 18:21:42,709 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:42,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:42,710 INFO L85 PathProgramCache]: Analyzing trace with hash -502026436, now seen corresponding path program 7 times [2024-09-17 18:21:42,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:42,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912945507] [2024-09-17 18:21:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:42,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:42,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:21:42,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:42,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912945507] [2024-09-17 18:21:42,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912945507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:42,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768921106] [2024-09-17 18:21:42,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:21:42,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:42,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:42,891 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) [2024-09-17 18:21:42,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-17 18:21:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:42,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:21:42,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 18:21:43,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 18:21:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768921106] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:43,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:43,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-09-17 18:21:43,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112466867] [2024-09-17 18:21:43,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:43,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 18:21:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:43,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 18:21:43,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:21:43,228 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) [2024-09-17 18:21:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:44,745 INFO L93 Difference]: Finished difference Result 537 states and 812 transitions. [2024-09-17 18:21:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-09-17 18:21:44,745 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 [2024-09-17 18:21:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:44,748 INFO L225 Difference]: With dead ends: 537 [2024-09-17 18:21:44,753 INFO L226 Difference]: Without dead ends: 485 [2024-09-17 18:21:44,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=967, Invalid=3863, Unknown=0, NotChecked=0, Total=4830 [2024-09-17 18:21:44,756 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:44,757 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 405 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:21:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-09-17 18:21:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 235. [2024-09-17 18:21:44,859 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) [2024-09-17 18:21:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 328 transitions. [2024-09-17 18:21:44,862 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 328 transitions. Word has length 31 [2024-09-17 18:21:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:44,866 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 328 transitions. [2024-09-17 18:21:44,867 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) [2024-09-17 18:21:44,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 328 transitions. [2024-09-17 18:21:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-17 18:21:44,878 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:44,878 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] [2024-09-17 18:21:44,897 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:45,082 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 [2024-09-17 18:21:45,083 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:45,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash -737150836, now seen corresponding path program 10 times [2024-09-17 18:21:45,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:45,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178491503] [2024-09-17 18:21:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:45,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:45,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 18:21:45,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:45,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178491503] [2024-09-17 18:21:45,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178491503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:45,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639530770] [2024-09-17 18:21:45,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:21:45,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:45,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:45,321 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) [2024-09-17 18:21:45,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-17 18:21:45,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:21:45,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:45,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:21:45,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 18:21:45,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 18:21:45,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639530770] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:45,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:45,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-17 18:21:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58030691] [2024-09-17 18:21:45,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:45,486 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-17 18:21:45,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-17 18:21:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:21:45,487 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) [2024-09-17 18:21:49,822 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 [] [2024-09-17 18:21:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:49,942 INFO L93 Difference]: Finished difference Result 462 states and 718 transitions. [2024-09-17 18:21:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:21:49,942 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 [2024-09-17 18:21:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:49,945 INFO L225 Difference]: With dead ends: 462 [2024-09-17 18:21:49,945 INFO L226 Difference]: Without dead ends: 423 [2024-09-17 18:21:49,945 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:21:49,946 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 [2024-09-17 18:21:49,946 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] [2024-09-17 18:21:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-17 18:21:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 333. [2024-09-17 18:21:50,115 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) [2024-09-17 18:21:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 486 transitions. [2024-09-17 18:21:50,118 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 486 transitions. Word has length 33 [2024-09-17 18:21:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:50,118 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 486 transitions. [2024-09-17 18:21:50,118 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) [2024-09-17 18:21:50,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 486 transitions. [2024-09-17 18:21:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-17 18:21:50,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:50,124 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] [2024-09-17 18:21:50,139 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:50,325 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 [2024-09-17 18:21:50,325 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:50,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1047726976, now seen corresponding path program 11 times [2024-09-17 18:21:50,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:50,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865079551] [2024-09-17 18:21:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:50,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:50,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:21:50,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865079551] [2024-09-17 18:21:50,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865079551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666204009] [2024-09-17 18:21:50,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:21:50,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:50,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:50,619 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) [2024-09-17 18:21:50,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-17 18:21:50,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 18:21:50,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:50,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:21:50,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 18:21:50,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-17 18:21:50,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666204009] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:50,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:50,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 8] total 24 [2024-09-17 18:21:50,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034257990] [2024-09-17 18:21:50,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:50,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 18:21:50,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 18:21:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:21:50,941 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) [2024-09-17 18:21:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:52,370 INFO L93 Difference]: Finished difference Result 676 states and 984 transitions. [2024-09-17 18:21:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-17 18:21:52,371 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 [2024-09-17 18:21:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:52,373 INFO L225 Difference]: With dead ends: 676 [2024-09-17 18:21:52,373 INFO L226 Difference]: Without dead ends: 511 [2024-09-17 18:21:52,379 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:21:52,383 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:52,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 581 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:21:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-09-17 18:21:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 367. [2024-09-17 18:21:52,542 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) [2024-09-17 18:21:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 515 transitions. [2024-09-17 18:21:52,549 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 515 transitions. Word has length 34 [2024-09-17 18:21:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:52,550 INFO L474 AbstractCegarLoop]: Abstraction has 367 states and 515 transitions. [2024-09-17 18:21:52,550 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) [2024-09-17 18:21:52,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 515 transitions. [2024-09-17 18:21:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 18:21:52,551 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:52,551 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] [2024-09-17 18:21:52,566 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:52,751 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 [2024-09-17 18:21:52,752 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:52,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:52,752 INFO L85 PathProgramCache]: Analyzing trace with hash 513042476, now seen corresponding path program 12 times [2024-09-17 18:21:52,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:52,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448099622] [2024-09-17 18:21:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:52,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:53,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:21:53,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448099622] [2024-09-17 18:21:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448099622] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532227140] [2024-09-17 18:21:53,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:21:53,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:53,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:53,079 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) [2024-09-17 18:21:53,080 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-17 18:21:53,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 18:21:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:53,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:21:53,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-17 18:21:53,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-17 18:21:53,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532227140] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:53,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:53,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 10] total 30 [2024-09-17 18:21:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288257239] [2024-09-17 18:21:53,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:53,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 18:21:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 18:21:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:21:53,602 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) [2024-09-17 18:21:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:56,453 INFO L93 Difference]: Finished difference Result 742 states and 1046 transitions. [2024-09-17 18:21:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-17 18:21:56,454 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 [2024-09-17 18:21:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:56,457 INFO L225 Difference]: With dead ends: 742 [2024-09-17 18:21:56,457 INFO L226 Difference]: Without dead ends: 595 [2024-09-17 18:21:56,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1068, Invalid=6942, Unknown=0, NotChecked=0, Total=8010 [2024-09-17 18:21:56,460 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 210 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:56,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 686 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-17 18:21:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-09-17 18:21:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 383. [2024-09-17 18:21:56,649 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) [2024-09-17 18:21:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 528 transitions. [2024-09-17 18:21:56,653 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 528 transitions. Word has length 35 [2024-09-17 18:21:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:56,653 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 528 transitions. [2024-09-17 18:21:56,654 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) [2024-09-17 18:21:56,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 528 transitions. [2024-09-17 18:21:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-17 18:21:56,655 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:56,655 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:56,672 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-17 18:21:56,859 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 [2024-09-17 18:21:56,860 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:56,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1273319442, now seen corresponding path program 3 times [2024-09-17 18:21:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:56,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716127660] [2024-09-17 18:21:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:56,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:57,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-17 18:21:57,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:57,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716127660] [2024-09-17 18:21:57,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716127660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:57,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692786699] [2024-09-17 18:21:57,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:21:57,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:57,074 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) [2024-09-17 18:21:57,082 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-17 18:21:57,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:21:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:57,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:21:57,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-17 18:21:57,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-17 18:21:57,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692786699] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:57,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:57,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-17 18:21:57,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061629375] [2024-09-17 18:21:57,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:57,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 18:21:57,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 18:21:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:21:57,533 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) [2024-09-17 18:22:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:22:00,270 INFO L93 Difference]: Finished difference Result 812 states and 1129 transitions. [2024-09-17 18:22:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-09-17 18:22:00,271 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 [2024-09-17 18:22:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:22:00,275 INFO L225 Difference]: With dead ends: 812 [2024-09-17 18:22:00,275 INFO L226 Difference]: Without dead ends: 735 [2024-09-17 18:22:00,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1589, Invalid=6243, Unknown=0, NotChecked=0, Total=7832 [2024-09-17 18:22:00,278 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-09-17 18:22:00,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 374 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-17 18:22:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-17 18:22:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 436. [2024-09-17 18:22:00,511 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) [2024-09-17 18:22:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 600 transitions. [2024-09-17 18:22:00,514 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 600 transitions. Word has length 36 [2024-09-17 18:22:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:22:00,515 INFO L474 AbstractCegarLoop]: Abstraction has 436 states and 600 transitions. [2024-09-17 18:22:00,515 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) [2024-09-17 18:22:00,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 600 transitions. [2024-09-17 18:22:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-17 18:22:00,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:22:00,517 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] [2024-09-17 18:22:00,536 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-17 18:22:00,717 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 [2024-09-17 18:22:00,718 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:22:00,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 771129250, now seen corresponding path program 13 times [2024-09-17 18:22:00,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:22:00,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944718959] [2024-09-17 18:22:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:22:00,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:22:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:00,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:22:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 18:22:00,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:22:00,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944718959] [2024-09-17 18:22:00,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944718959] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:22:00,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057762340] [2024-09-17 18:22:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:22:00,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:22:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:22:00,976 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) [2024-09-17 18:22:00,984 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-17 18:22:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:01,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:22:01,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:22:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:22:01,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:22:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:22:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057762340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:22:01,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:22:01,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-17 18:22:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427774405] [2024-09-17 18:22:01,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:22:01,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:22:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:22:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:22:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:22:01,335 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) [2024-09-17 18:22:05,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:22:13,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:22:21,832 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 [] [2024-09-17 18:22:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:22:22,142 INFO L93 Difference]: Finished difference Result 629 states and 870 transitions. [2024-09-17 18:22:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 18:22:22,143 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 [2024-09-17 18:22:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:22:22,146 INFO L225 Difference]: With dead ends: 629 [2024-09-17 18:22:22,146 INFO L226 Difference]: Without dead ends: 611 [2024-09-17 18:22:22,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=189, Invalid=621, Unknown=2, NotChecked=0, Total=812 [2024-09-17 18:22:22,148 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, 12.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:22:22,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 193 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2024-09-17 18:22:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2024-09-17 18:22:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 476. [2024-09-17 18:22:22,396 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) [2024-09-17 18:22:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 651 transitions. [2024-09-17 18:22:22,398 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 651 transitions. Word has length 38 [2024-09-17 18:22:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:22:22,399 INFO L474 AbstractCegarLoop]: Abstraction has 476 states and 651 transitions. [2024-09-17 18:22:22,399 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) [2024-09-17 18:22:22,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 651 transitions. [2024-09-17 18:22:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-17 18:22:22,400 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:22:22,400 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] [2024-09-17 18:22:22,415 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-17 18:22:22,604 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 [2024-09-17 18:22:22,605 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:22:22,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1102958530, now seen corresponding path program 14 times [2024-09-17 18:22:22,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:22:22,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364728631] [2024-09-17 18:22:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:22:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:22:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:22,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:22:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 18:22:22,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:22:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364728631] [2024-09-17 18:22:22,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364728631] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:22:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102706] [2024-09-17 18:22:22,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:22:22,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:22:22,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:22:22,853 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) [2024-09-17 18:22:22,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-17 18:22:22,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:22:22,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:22:22,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-17 18:22:22,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:22:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:22:23,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:22:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-17 18:22:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102706] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:22:23,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:22:23,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 17] total 45 [2024-09-17 18:22:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898498002] [2024-09-17 18:22:23,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:22:23,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-17 18:22:23,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:22:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-17 18:22:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:22:23,789 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) [2024-09-17 18:22:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:22:28,782 INFO L93 Difference]: Finished difference Result 1019 states and 1392 transitions. [2024-09-17 18:22:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-17 18:22:28,782 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 [2024-09-17 18:22:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:22:28,786 INFO L225 Difference]: With dead ends: 1019 [2024-09-17 18:22:28,786 INFO L226 Difference]: Without dead ends: 779 [2024-09-17 18:22:28,787 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1601, Invalid=10389, Unknown=0, NotChecked=0, Total=11990 [2024-09-17 18:22:28,788 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 92 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:22:28,788 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1304 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-17 18:22:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2024-09-17 18:22:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 468. [2024-09-17 18:22:29,103 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) [2024-09-17 18:22:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 656 transitions. [2024-09-17 18:22:29,106 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 656 transitions. Word has length 38 [2024-09-17 18:22:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:22:29,106 INFO L474 AbstractCegarLoop]: Abstraction has 468 states and 656 transitions. [2024-09-17 18:22:29,107 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) [2024-09-17 18:22:29,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 656 transitions. [2024-09-17 18:22:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-17 18:22:29,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:22:29,108 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:22:29,126 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-17 18:22:29,312 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 [2024-09-17 18:22:29,314 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:22:29,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:29,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821890, now seen corresponding path program 4 times [2024-09-17 18:22:29,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:22:29,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375185386] [2024-09-17 18:22:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:22:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:22:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:29,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:22:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 18:22:29,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:22:29,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375185386] [2024-09-17 18:22:29,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375185386] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:22:29,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154337411] [2024-09-17 18:22:29,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:22:29,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:22:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:22:29,602 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) [2024-09-17 18:22:29,610 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-17 18:22:29,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:22:29,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:22:29,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:22:29,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:22:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-17 18:22:29,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:22:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-17 18:22:30,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154337411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:22:30,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:22:30,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-09-17 18:22:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111512163] [2024-09-17 18:22:30,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:22:30,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-17 18:22:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:22:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-17 18:22:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:22:30,189 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) [2024-09-17 18:22:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:22:34,652 INFO L93 Difference]: Finished difference Result 1176 states and 1620 transitions. [2024-09-17 18:22:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-17 18:22:34,653 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 [2024-09-17 18:22:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:22:34,658 INFO L225 Difference]: With dead ends: 1176 [2024-09-17 18:22:34,658 INFO L226 Difference]: Without dead ends: 1076 [2024-09-17 18:22:34,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2517, Invalid=10823, Unknown=0, NotChecked=0, Total=13340 [2024-09-17 18:22:34,662 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 231 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:22:34,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 542 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-17 18:22:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2024-09-17 18:22:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 537. [2024-09-17 18:22:35,069 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) [2024-09-17 18:22:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 747 transitions. [2024-09-17 18:22:35,072 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 747 transitions. Word has length 39 [2024-09-17 18:22:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:22:35,072 INFO L474 AbstractCegarLoop]: Abstraction has 537 states and 747 transitions. [2024-09-17 18:22:35,072 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) [2024-09-17 18:22:35,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 747 transitions. [2024-09-17 18:22:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:22:35,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:22:35,074 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] [2024-09-17 18:22:35,091 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-17 18:22:35,277 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 [2024-09-17 18:22:35,278 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:22:35,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1752322643, now seen corresponding path program 15 times [2024-09-17 18:22:35,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:22:35,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871990034] [2024-09-17 18:22:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:22:35,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:22:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:35,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:22:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 18:22:35,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:22:35,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871990034] [2024-09-17 18:22:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871990034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:22:35,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866220593] [2024-09-17 18:22:35,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:22:35,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:22:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:22:35,545 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) [2024-09-17 18:22:35,554 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-17 18:22:35,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:22:35,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:22:35,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:22:35,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:22:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 18:22:35,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:22:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 18:22:35,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866220593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:22:35,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:22:35,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-09-17 18:22:35,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002944405] [2024-09-17 18:22:35,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:22:35,823 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-17 18:22:35,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:22:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-17 18:22:35,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:22:35,824 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) [2024-09-17 18:22:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:22:36,350 INFO L93 Difference]: Finished difference Result 616 states and 847 transitions. [2024-09-17 18:22:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:22:36,351 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 [2024-09-17 18:22:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:22:36,354 INFO L225 Difference]: With dead ends: 616 [2024-09-17 18:22:36,354 INFO L226 Difference]: Without dead ends: 568 [2024-09-17 18:22:36,354 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 [2024-09-17 18:22:36,355 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-17 18:22:36,355 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] [2024-09-17 18:22:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-17 18:22:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 523. [2024-09-17 18:22:36,756 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) [2024-09-17 18:22:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 732 transitions. [2024-09-17 18:22:36,761 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 732 transitions. Word has length 41 [2024-09-17 18:22:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:22:36,762 INFO L474 AbstractCegarLoop]: Abstraction has 523 states and 732 transitions. [2024-09-17 18:22:36,762 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) [2024-09-17 18:22:36,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 732 transitions. [2024-09-17 18:22:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:22:36,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:22:36,763 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] [2024-09-17 18:22:36,785 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-17 18:22:36,964 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 [2024-09-17 18:22:36,964 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:22:36,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash 846902028, now seen corresponding path program 16 times [2024-09-17 18:22:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:22:36,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699075576] [2024-09-17 18:22:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:22:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:22:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:37,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:22:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-17 18:22:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:22:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699075576] [2024-09-17 18:22:37,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699075576] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:22:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490074940] [2024-09-17 18:22:37,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:22:37,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:22:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:22:37,358 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) [2024-09-17 18:22:37,359 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-17 18:22:37,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:22:37,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:22:37,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-17 18:22:37,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:22:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-17 18:22:37,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:22:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-17 18:22:37,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490074940] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:22:37,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:22:37,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 32 [2024-09-17 18:22:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495654023] [2024-09-17 18:22:37,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:22:37,772 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-17 18:22:37,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:22:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-17 18:22:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:22:37,773 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) [2024-09-17 18:22:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:22:39,885 INFO L93 Difference]: Finished difference Result 1216 states and 1685 transitions. [2024-09-17 18:22:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-17 18:22:39,886 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 [2024-09-17 18:22:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:22:39,891 INFO L225 Difference]: With dead ends: 1216 [2024-09-17 18:22:39,891 INFO L226 Difference]: Without dead ends: 972 [2024-09-17 18:22:39,892 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:22:39,892 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 205 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:22:39,892 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 753 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:22:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-09-17 18:22:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 584. [2024-09-17 18:22:40,331 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) [2024-09-17 18:22:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 787 transitions. [2024-09-17 18:22:40,334 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 787 transitions. Word has length 41 [2024-09-17 18:22:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:22:40,335 INFO L474 AbstractCegarLoop]: Abstraction has 584 states and 787 transitions. [2024-09-17 18:22:40,335 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) [2024-09-17 18:22:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 787 transitions. [2024-09-17 18:22:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-17 18:22:40,336 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:22:40,336 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:22:40,352 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-17 18:22:40,540 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 [2024-09-17 18:22:40,541 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:22:40,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 706640914, now seen corresponding path program 5 times [2024-09-17 18:22:40,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:22:40,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010006317] [2024-09-17 18:22:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:22:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:22:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:40,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:22:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:22:40,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:22:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010006317] [2024-09-17 18:22:40,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010006317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:22:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579325478] [2024-09-17 18:22:40,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:22:40,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:22:40,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:22:40,910 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) [2024-09-17 18:22:40,911 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-17 18:22:41,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-17 18:22:41,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:22:41,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:22:41,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:22:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-17 18:22:41,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:22:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-17 18:22:41,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579325478] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:22:41,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:22:41,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2024-09-17 18:22:41,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129283919] [2024-09-17 18:22:41,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:22:41,863 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 18:22:41,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:22:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 18:22:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:22:41,864 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) [2024-09-17 18:22:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:22:50,237 INFO L93 Difference]: Finished difference Result 1001 states and 1353 transitions. [2024-09-17 18:22:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-09-17 18:22:50,237 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 [2024-09-17 18:22:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:22:50,241 INFO L225 Difference]: With dead ends: 1001 [2024-09-17 18:22:50,241 INFO L226 Difference]: Without dead ends: 893 [2024-09-17 18:22:50,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1557, Invalid=28199, Unknown=0, NotChecked=0, Total=29756 [2024-09-17 18:22:50,245 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:22:50,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 285 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-17 18:22:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2024-09-17 18:22:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 552. [2024-09-17 18:22:50,686 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) [2024-09-17 18:22:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 734 transitions. [2024-09-17 18:22:50,689 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 734 transitions. Word has length 42 [2024-09-17 18:22:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:22:50,689 INFO L474 AbstractCegarLoop]: Abstraction has 552 states and 734 transitions. [2024-09-17 18:22:50,689 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) [2024-09-17 18:22:50,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 734 transitions. [2024-09-17 18:22:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-17 18:22:50,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:22:50,690 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] [2024-09-17 18:22:50,706 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-17 18:22:50,891 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 [2024-09-17 18:22:50,891 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:22:50,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:22:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1382511156, now seen corresponding path program 17 times [2024-09-17 18:22:50,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:22:50,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348072822] [2024-09-17 18:22:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:22:50,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:22:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:51,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:22:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:22:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-17 18:22:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:22:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348072822] [2024-09-17 18:22:51,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348072822] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:22:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780029183] [2024-09-17 18:22:51,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:22:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:22:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:22:51,201 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) [2024-09-17 18:22:51,205 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-17 18:22:51,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-17 18:22:51,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:22:51,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:22:51,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:22:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-17 18:22:51,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:22:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-17 18:22:51,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780029183] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:22:51,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:22:51,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-17 18:22:51,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690441868] [2024-09-17 18:22:51,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:22:51,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:22:51,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:22:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:22:51,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:22:51,688 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) [2024-09-17 18:22:56,079 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 [] [2024-09-17 18:23:04,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:23:12,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:23:20,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:23:24,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:23:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:23:25,142 INFO L93 Difference]: Finished difference Result 891 states and 1231 transitions. [2024-09-17 18:23:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:23:25,143 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 [2024-09-17 18:23:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:23:25,147 INFO L225 Difference]: With dead ends: 891 [2024-09-17 18:23:25,147 INFO L226 Difference]: Without dead ends: 860 [2024-09-17 18:23:25,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=344, Invalid=1293, Unknown=3, NotChecked=0, Total=1640 [2024-09-17 18:23:25,148 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s 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 [2024-09-17 18:23:25,148 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] [2024-09-17 18:23:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2024-09-17 18:23:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 690. [2024-09-17 18:23:25,710 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) [2024-09-17 18:23:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 937 transitions. [2024-09-17 18:23:25,713 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 937 transitions. Word has length 43 [2024-09-17 18:23:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:23:25,713 INFO L474 AbstractCegarLoop]: Abstraction has 690 states and 937 transitions. [2024-09-17 18:23:25,714 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) [2024-09-17 18:23:25,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 937 transitions. [2024-09-17 18:23:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-17 18:23:25,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:23:25,715 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] [2024-09-17 18:23:25,731 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-17 18:23:25,919 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 [2024-09-17 18:23:25,920 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:23:25,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash 764816386, now seen corresponding path program 18 times [2024-09-17 18:23:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:23:25,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111853029] [2024-09-17 18:23:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:23:25,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:23:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:26,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:23:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 18:23:26,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:23:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111853029] [2024-09-17 18:23:26,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111853029] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:23:26,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498411878] [2024-09-17 18:23:26,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:23:26,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:23:26,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:23:26,217 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) [2024-09-17 18:23:26,218 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-17 18:23:26,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 18:23:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:23:26,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:23:26,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:23:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-17 18:23:26,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:23:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-17 18:23:26,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498411878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:23:26,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:23:26,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2024-09-17 18:23:26,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58890918] [2024-09-17 18:23:26,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:23:26,834 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-17 18:23:26,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:23:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-17 18:23:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:23:26,835 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) [2024-09-17 18:23:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:23:32,550 INFO L93 Difference]: Finished difference Result 1431 states and 1953 transitions. [2024-09-17 18:23:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2024-09-17 18:23:32,551 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 [2024-09-17 18:23:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:23:32,555 INFO L225 Difference]: With dead ends: 1431 [2024-09-17 18:23:32,555 INFO L226 Difference]: Without dead ends: 1020 [2024-09-17 18:23:32,557 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2024-09-17 18:23:32,558 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:23:32,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1186 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-17 18:23:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2024-09-17 18:23:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 633. [2024-09-17 18:23:33,103 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) [2024-09-17 18:23:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 866 transitions. [2024-09-17 18:23:33,105 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 866 transitions. Word has length 44 [2024-09-17 18:23:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:23:33,106 INFO L474 AbstractCegarLoop]: Abstraction has 633 states and 866 transitions. [2024-09-17 18:23:33,106 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) [2024-09-17 18:23:33,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 866 transitions. [2024-09-17 18:23:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-17 18:23:33,107 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:23:33,107 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:23:33,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-17 18:23:33,311 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 [2024-09-17 18:23:33,312 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:23:33,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1388997645, now seen corresponding path program 6 times [2024-09-17 18:23:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:23:33,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535019010] [2024-09-17 18:23:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:23:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:23:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:33,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:23:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:23:33,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:23:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535019010] [2024-09-17 18:23:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535019010] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:23:33,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626673857] [2024-09-17 18:23:33,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:23:33,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:23:33,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:23:33,728 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) [2024-09-17 18:23:33,732 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-17 18:23:33,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-17 18:23:33,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:23:33,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-17 18:23:33,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:23:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-17 18:23:34,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:23:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-17 18:23:34,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626673857] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:23:34,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:23:34,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-17 18:23:34,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338789964] [2024-09-17 18:23:34,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:23:34,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-17 18:23:34,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:23:34,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-17 18:23:34,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:23:34,870 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) [2024-09-17 18:23:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:23:48,635 INFO L93 Difference]: Finished difference Result 1095 states and 1487 transitions. [2024-09-17 18:23:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-09-17 18:23:48,635 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 [2024-09-17 18:23:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:23:48,640 INFO L225 Difference]: With dead ends: 1095 [2024-09-17 18:23:48,640 INFO L226 Difference]: Without dead ends: 981 [2024-09-17 18:23:48,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18795 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2342, Invalid=48960, Unknown=0, NotChecked=0, Total=51302 [2024-09-17 18:23:48,644 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 5338 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s 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, 3.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:23:48,644 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 351 Invalid, 5638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 5338 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-17 18:23:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2024-09-17 18:23:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 653. [2024-09-17 18:23:49,271 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) [2024-09-17 18:23:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 879 transitions. [2024-09-17 18:23:49,274 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 879 transitions. Word has length 45 [2024-09-17 18:23:49,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:23:49,274 INFO L474 AbstractCegarLoop]: Abstraction has 653 states and 879 transitions. [2024-09-17 18:23:49,275 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) [2024-09-17 18:23:49,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 879 transitions. [2024-09-17 18:23:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-17 18:23:49,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:23:49,276 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] [2024-09-17 18:23:49,297 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-17 18:23:49,480 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 [2024-09-17 18:23:49,481 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:23:49,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2100972460, now seen corresponding path program 19 times [2024-09-17 18:23:49,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:23:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797249865] [2024-09-17 18:23:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:23:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:23:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:49,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:23:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 18:23:49,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:23:49,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797249865] [2024-09-17 18:23:49,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797249865] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:23:49,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979597300] [2024-09-17 18:23:49,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:23:49,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:23:49,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:23:49,814 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) [2024-09-17 18:23:49,815 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-17 18:23:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:49,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-17 18:23:49,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:23:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 18:23:50,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:23:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-17 18:23:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979597300] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:23:50,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:23:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 14] total 39 [2024-09-17 18:23:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935340923] [2024-09-17 18:23:50,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:23:50,459 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-17 18:23:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:23:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-17 18:23:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 18:23:50,461 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) [2024-09-17 18:23:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:23:57,317 INFO L93 Difference]: Finished difference Result 1398 states and 1905 transitions. [2024-09-17 18:23:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-09-17 18:23:57,318 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 [2024-09-17 18:23:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:23:57,323 INFO L225 Difference]: With dead ends: 1398 [2024-09-17 18:23:57,323 INFO L226 Difference]: Without dead ends: 1092 [2024-09-17 18:23:57,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1037, Invalid=15475, Unknown=0, NotChecked=0, Total=16512 [2024-09-17 18:23:57,324 INFO L434 NwaCegarLoop]: 76 mSDtfsCounter, 138 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:23:57,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1664 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 18:23:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2024-09-17 18:23:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 683. [2024-09-17 18:23:58,032 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) [2024-09-17 18:23:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 939 transitions. [2024-09-17 18:23:58,035 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 939 transitions. Word has length 45 [2024-09-17 18:23:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:23:58,035 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 939 transitions. [2024-09-17 18:23:58,035 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) [2024-09-17 18:23:58,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 939 transitions. [2024-09-17 18:23:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-17 18:23:58,037 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:23:58,037 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] [2024-09-17 18:23:58,054 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-17 18:23:58,241 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 [2024-09-17 18:23:58,242 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:23:58,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:23:58,242 INFO L85 PathProgramCache]: Analyzing trace with hash 516511681, now seen corresponding path program 20 times [2024-09-17 18:23:58,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:23:58,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017812319] [2024-09-17 18:23:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:23:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:23:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:58,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:23:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:23:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-17 18:23:58,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:23:58,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017812319] [2024-09-17 18:23:58,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017812319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:23:58,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939089351] [2024-09-17 18:23:58,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:23:58,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:23:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:23:58,545 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) [2024-09-17 18:23:58,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-17 18:23:58,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:23:58,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:23:58,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:23:58,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:23:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-17 18:23:58,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:23:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-17 18:23:58,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939089351] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:23:58,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:23:58,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-09-17 18:23:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731979663] [2024-09-17 18:23:58,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:23:58,967 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:23:58,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:23:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:23:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:23:58,967 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) [2024-09-17 18:24:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:24:00,123 INFO L93 Difference]: Finished difference Result 765 states and 1040 transitions. [2024-09-17 18:24:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:24:00,124 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 [2024-09-17 18:24:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:24:00,128 INFO L225 Difference]: With dead ends: 765 [2024-09-17 18:24:00,128 INFO L226 Difference]: Without dead ends: 715 [2024-09-17 18:24:00,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:24:00,129 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-17 18:24:00,129 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] [2024-09-17 18:24:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-09-17 18:24:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 667. [2024-09-17 18:24:01,210 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) [2024-09-17 18:24:01,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 922 transitions. [2024-09-17 18:24:01,213 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 922 transitions. Word has length 46 [2024-09-17 18:24:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:24:01,213 INFO L474 AbstractCegarLoop]: Abstraction has 667 states and 922 transitions. [2024-09-17 18:24:01,213 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) [2024-09-17 18:24:01,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:24:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 922 transitions. [2024-09-17 18:24:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:24:01,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:24:01,215 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] [2024-09-17 18:24:01,231 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-17 18:24:01,419 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 [2024-09-17 18:24:01,420 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:24:01,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:24:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2051607266, now seen corresponding path program 21 times [2024-09-17 18:24:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:24:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705286522] [2024-09-17 18:24:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:24:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:24:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:24:02,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:24:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:24:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-17 18:24:02,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:24:02,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705286522] [2024-09-17 18:24:02,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705286522] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:24:02,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691313797] [2024-09-17 18:24:02,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:24:02,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:24:02,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:24:02,065 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) [2024-09-17 18:24:02,073 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-17 18:24:02,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-17 18:24:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:24:02,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:24:02,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:24:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-17 18:24:02,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:24:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-17 18:24:02,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691313797] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:24:02,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:24:02,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2024-09-17 18:24:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352175771] [2024-09-17 18:24:02,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:24:02,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 18:24:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:24:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 18:24:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:24:02,781 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) [2024-09-17 18:24:07,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:24:15,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:24:23,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:24:31,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:24:39,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:24:44,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-17 18:24:48,525 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 [] [2024-09-17 18:24:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:24:49,078 INFO L93 Difference]: Finished difference Result 1029 states and 1507 transitions. [2024-09-17 18:24:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-17 18:24:49,078 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 [2024-09-17 18:24:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:24:49,083 INFO L225 Difference]: With dead ends: 1029 [2024-09-17 18:24:49,083 INFO L226 Difference]: Without dead ends: 992 [2024-09-17 18:24:49,084 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 81 SyntacticMatches, 15 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=447, Invalid=1805, Unknown=4, NotChecked=0, Total=2256 [2024-09-17 18:24:49,084 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 59 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:24:49,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 189 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 304 Invalid, 7 Unknown, 0 Unchecked, 28.3s Time] [2024-09-17 18:24:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2024-09-17 18:24:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 882. [2024-09-17 18:24:50,030 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) [2024-09-17 18:24:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1265 transitions. [2024-09-17 18:24:50,034 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1265 transitions. Word has length 48 [2024-09-17 18:24:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:24:50,034 INFO L474 AbstractCegarLoop]: Abstraction has 882 states and 1265 transitions. [2024-09-17 18:24:50,034 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) [2024-09-17 18:24:50,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:24:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1265 transitions. [2024-09-17 18:24:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:24:50,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:24:50,036 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] [2024-09-17 18:24:50,052 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-17 18:24:50,240 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 [2024-09-17 18:24:50,241 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:24:50,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:24:50,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1035706990, now seen corresponding path program 22 times [2024-09-17 18:24:50,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:24:50,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854255746] [2024-09-17 18:24:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:24:50,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:24:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:24:50,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:24:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:24:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-17 18:24:50,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:24:50,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854255746] [2024-09-17 18:24:50,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854255746] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:24:50,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886010440] [2024-09-17 18:24:50,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:24:50,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:24:50,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:24:50,854 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) [2024-09-17 18:24:50,869 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-17 18:24:50,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:24:50,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:24:50,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-17 18:24:50,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:24:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-17 18:24:51,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:24:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-17 18:24:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886010440] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:24:52,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:24:52,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-17 18:24:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597716189] [2024-09-17 18:24:52,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:24:52,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-17 18:24:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:24:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-17 18:24:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:24:52,102 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) [2024-09-17 18:25:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:25:01,635 INFO L93 Difference]: Finished difference Result 1260 states and 1741 transitions. [2024-09-17 18:25:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-09-17 18:25:01,635 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 [2024-09-17 18:25:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:25:01,641 INFO L225 Difference]: With dead ends: 1260 [2024-09-17 18:25:01,641 INFO L226 Difference]: Without dead ends: 1162 [2024-09-17 18:25:01,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1577, Invalid=16783, Unknown=0, NotChecked=0, Total=18360 [2024-09-17 18:25:01,643 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:25:01,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 664 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-17 18:25:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2024-09-17 18:25:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 834. [2024-09-17 18:25:02,633 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) [2024-09-17 18:25:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1192 transitions. [2024-09-17 18:25:02,641 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1192 transitions. Word has length 48 [2024-09-17 18:25:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:25:02,641 INFO L474 AbstractCegarLoop]: Abstraction has 834 states and 1192 transitions. [2024-09-17 18:25:02,641 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) [2024-09-17 18:25:02,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1192 transitions. [2024-09-17 18:25:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:25:02,650 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:25:02,650 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:25:02,670 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-17 18:25:02,851 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 [2024-09-17 18:25:02,851 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:25:02,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -308673998, now seen corresponding path program 7 times [2024-09-17 18:25:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:25:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525405026] [2024-09-17 18:25:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:25:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:25:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:03,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:25:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:25:03,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:25:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525405026] [2024-09-17 18:25:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525405026] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:25:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845602673] [2024-09-17 18:25:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:25:03,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:25:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:25:03,540 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) [2024-09-17 18:25:03,541 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-17 18:25:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:03,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-17 18:25:03,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:25:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-17 18:25:04,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:25:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-17 18:25:04,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845602673] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:25:04,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:25:04,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-17 18:25:04,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780429335] [2024-09-17 18:25:04,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:25:04,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-17 18:25:04,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:25:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-17 18:25:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:25:04,777 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) [2024-09-17 18:25:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:25:22,579 INFO L93 Difference]: Finished difference Result 1394 states and 1948 transitions. [2024-09-17 18:25:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2024-09-17 18:25:22,579 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 [2024-09-17 18:25:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:25:22,585 INFO L225 Difference]: With dead ends: 1394 [2024-09-17 18:25:22,585 INFO L226 Difference]: Without dead ends: 1258 [2024-09-17 18:25:22,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 80 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24160 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=2754, Invalid=62526, Unknown=0, NotChecked=0, Total=65280 [2024-09-17 18:25:22,589 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 6761 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 7062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 6761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:25:22,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 400 Invalid, 7062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 6761 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-17 18:25:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2024-09-17 18:25:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 855. [2024-09-17 18:25:23,601 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) [2024-09-17 18:25:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1206 transitions. [2024-09-17 18:25:23,604 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1206 transitions. Word has length 48 [2024-09-17 18:25:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:25:23,605 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 1206 transitions. [2024-09-17 18:25:23,605 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) [2024-09-17 18:25:23,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1206 transitions. [2024-09-17 18:25:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:25:23,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:25:23,607 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] [2024-09-17 18:25:23,625 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-17 18:25:23,810 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 [2024-09-17 18:25:23,811 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:25:23,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1163134880, now seen corresponding path program 23 times [2024-09-17 18:25:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:25:23,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761143384] [2024-09-17 18:25:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:25:23,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:25:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:24,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:25:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-17 18:25:24,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:25:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761143384] [2024-09-17 18:25:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761143384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:25:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680353059] [2024-09-17 18:25:24,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:25:24,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:25:24,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:25:24,234 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) [2024-09-17 18:25:24,243 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-17 18:25:24,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-17 18:25:24,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:25:24,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-17 18:25:24,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:25:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-17 18:25:24,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:25:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-17 18:25:25,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680353059] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:25:25,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:25:25,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 12] total 39 [2024-09-17 18:25:25,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990538490] [2024-09-17 18:25:25,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:25:25,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-17 18:25:25,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:25:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-17 18:25:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 18:25:25,009 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) [2024-09-17 18:25:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:25:30,007 INFO L93 Difference]: Finished difference Result 1918 states and 2689 transitions. [2024-09-17 18:25:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-17 18:25:30,007 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 [2024-09-17 18:25:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:25:30,014 INFO L225 Difference]: With dead ends: 1918 [2024-09-17 18:25:30,014 INFO L226 Difference]: Without dead ends: 1657 [2024-09-17 18:25:30,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=984, Invalid=3176, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 18:25:30,016 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 375 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:25:30,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1399 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-17 18:25:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2024-09-17 18:25:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 957. [2024-09-17 18:25:31,169 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) [2024-09-17 18:25:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1298 transitions. [2024-09-17 18:25:31,173 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1298 transitions. Word has length 48 [2024-09-17 18:25:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:25:31,173 INFO L474 AbstractCegarLoop]: Abstraction has 957 states and 1298 transitions. [2024-09-17 18:25:31,174 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) [2024-09-17 18:25:31,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1298 transitions. [2024-09-17 18:25:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-17 18:25:31,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:25:31,176 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] [2024-09-17 18:25:31,193 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-17 18:25:31,376 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 [2024-09-17 18:25:31,377 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:25:31,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:31,377 INFO L85 PathProgramCache]: Analyzing trace with hash -957060563, now seen corresponding path program 24 times [2024-09-17 18:25:31,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:25:31,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997405472] [2024-09-17 18:25:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:25:31,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:25:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:31,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:25:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:25:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:25:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997405472] [2024-09-17 18:25:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997405472] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:25:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002948253] [2024-09-17 18:25:31,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:25:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:25:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:25:31,680 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) [2024-09-17 18:25:31,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-17 18:25:31,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 18:25:31,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:25:31,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:25:31,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:25:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:25:31,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:25:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:25:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002948253] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:25:32,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:25:32,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-17 18:25:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266648922] [2024-09-17 18:25:32,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:25:32,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:25:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:25:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:25:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:25:32,030 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) [2024-09-17 18:25:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:25:33,299 INFO L93 Difference]: Finished difference Result 1040 states and 1398 transitions. [2024-09-17 18:25:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-17 18:25:33,299 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 [2024-09-17 18:25:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:25:33,304 INFO L225 Difference]: With dead ends: 1040 [2024-09-17 18:25:33,304 INFO L226 Difference]: Without dead ends: 988 [2024-09-17 18:25:33,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:25:33,305 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 [2024-09-17 18:25:33,305 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] [2024-09-17 18:25:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2024-09-17 18:25:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 939. [2024-09-17 18:25:34,358 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) [2024-09-17 18:25:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1279 transitions. [2024-09-17 18:25:34,361 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1279 transitions. Word has length 51 [2024-09-17 18:25:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:25:34,361 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1279 transitions. [2024-09-17 18:25:34,361 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) [2024-09-17 18:25:34,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1279 transitions. [2024-09-17 18:25:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-17 18:25:34,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:25:34,363 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] [2024-09-17 18:25:34,379 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-17 18:25:34,563 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 [2024-09-17 18:25:34,564 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:25:34,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:25:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1426629135, now seen corresponding path program 25 times [2024-09-17 18:25:34,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:25:34,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314796763] [2024-09-17 18:25:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:25:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:25:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:34,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:25:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-17 18:25:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:25:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314796763] [2024-09-17 18:25:34,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314796763] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:25:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482826490] [2024-09-17 18:25:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:25:34,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:25:34,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:25:34,989 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) [2024-09-17 18:25:34,990 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-17 18:25:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:25:35,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-17 18:25:35,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:25:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-17 18:25:35,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:25:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-17 18:25:36,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482826490] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:25:36,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:25:36,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-17 18:25:36,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360951479] [2024-09-17 18:25:36,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:25:36,245 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-17 18:25:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:25:36,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-17 18:25:36,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:25:36,246 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)