./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 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/nested3-1.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 ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 08:53:58,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 08:53:58,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 08:53:58,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 08:53:58,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 08:53:58,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 08:53:58,845 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 08:53:58,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 08:53:58,846 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 08:53:58,847 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 08:53:58,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 08:53:58,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 08:53:58,848 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 08:53:58,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 08:53:58,851 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 08:53:58,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 08:53:58,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 08:53:58,852 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 08:53:58,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 08:53:58,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 08:53:58,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 08:53:58,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 08:53:58,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 08:53:58,857 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 08:53:58,857 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 08:53:58,857 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 08:53:58,857 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 08:53:58,858 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 08:53:58,858 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 08:53:58,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 08:53:58,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 08:53:58,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 08:53:58,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:53:58,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 08:53:58,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 08:53:58,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 08:53:58,860 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 08:53:58,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 08:53:58,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 08:53:58,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 08:53:58,861 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 08:53:58,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 08:53:58,862 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 08:53:59,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 08:53:59,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 08:53:59,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 08:53:59,109 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 08:53:59,110 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 08:53:59,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-09-13 08:54:00,502 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 08:54:00,674 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 08:54:00,675 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2024-09-13 08:54:00,681 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7e15fe958/bf71c0c27e134f96b8580bc3947c4194/FLAGa7a87df9c [2024-09-13 08:54:00,693 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7e15fe958/bf71c0c27e134f96b8580bc3947c4194 [2024-09-13 08:54:00,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 08:54:00,697 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 08:54:00,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 08:54:00,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 08:54:00,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 08:54:00,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f07f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00, skipping insertion in model container [2024-09-13 08:54:00,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,719 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 08:54:00,862 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2024-09-13 08:54:00,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:54:00,889 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 08:54:00,897 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2024-09-13 08:54:00,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:54:00,919 INFO L204 MainTranslator]: Completed translation [2024-09-13 08:54:00,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00 WrapperNode [2024-09-13 08:54:00,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 08:54:00,921 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 08:54:00,921 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 08:54:00,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 08:54:00,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,940 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 08:54:00,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 08:54:00,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 08:54:00,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 08:54:00,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 08:54:00,951 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,958 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,968 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]. [2024-09-13 08:54:00,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,971 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,975 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 08:54:00,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 08:54:00,979 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 08:54:00,979 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 08:54:00,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (1/1) ... [2024-09-13 08:54:00,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:54:01,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:01,024 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) [2024-09-13 08:54:01,027 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 [2024-09-13 08:54:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 08:54:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 08:54:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 08:54:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 08:54:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 08:54:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 08:54:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 08:54:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 08:54:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 08:54:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 08:54:01,134 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 08:54:01,136 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 08:54:01,313 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-13 08:54:01,313 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 08:54:01,343 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 08:54:01,343 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-13 08:54:01,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:54:01 BoogieIcfgContainer [2024-09-13 08:54:01,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 08:54:01,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 08:54:01,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 08:54:01,350 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 08:54:01,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 08:54:00" (1/3) ... [2024-09-13 08:54:01,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36292b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:54:01, skipping insertion in model container [2024-09-13 08:54:01,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:54:00" (2/3) ... [2024-09-13 08:54:01,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36292b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:54:01, skipping insertion in model container [2024-09-13 08:54:01,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:54:01" (3/3) ... [2024-09-13 08:54:01,353 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2024-09-13 08:54:01,368 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 08:54:01,369 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 08:54:01,425 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 08:54:01,431 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;@7619917e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 08:54:01,431 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 08:54:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 08:54:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 08:54:01,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:01,441 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:01,442 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:01,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash -91449342, now seen corresponding path program 1 times [2024-09-13 08:54:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:01,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912512450] [2024-09-13 08:54:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:01,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:01,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:01,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912512450] [2024-09-13 08:54:01,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912512450] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:54:01,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:54:01,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 08:54:01,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974714903] [2024-09-13 08:54:01,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:54:01,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 08:54:01,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:01,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 08:54:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:54:01,690 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:01,727 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2024-09-13 08:54:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 08:54:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 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 10 [2024-09-13 08:54:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:01,735 INFO L225 Difference]: With dead ends: 48 [2024-09-13 08:54:01,735 INFO L226 Difference]: Without dead ends: 26 [2024-09-13 08:54:01,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:54:01,742 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 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 [2024-09-13 08:54:01,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:54:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-13 08:54:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2024-09-13 08:54:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:54:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-09-13 08:54:01,783 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2024-09-13 08:54:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:01,784 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-09-13 08:54:01,784 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:01,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-09-13 08:54:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 08:54:01,785 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:01,785 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:01,786 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 08:54:01,786 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1474394065, now seen corresponding path program 1 times [2024-09-13 08:54:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741819468] [2024-09-13 08:54:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:01,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:01,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:01,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741819468] [2024-09-13 08:54:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741819468] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:54:01,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:54:01,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 08:54:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668219187] [2024-09-13 08:54:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:54:01,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 08:54:01,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 08:54:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:54:01,937 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:01,955 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-09-13 08:54:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 08:54:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2024-09-13 08:54:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:01,961 INFO L225 Difference]: With dead ends: 38 [2024-09-13 08:54:01,961 INFO L226 Difference]: Without dead ends: 24 [2024-09-13 08:54:01,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:54:01,963 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:54:01,963 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:54:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-13 08:54:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2024-09-13 08:54:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:54:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-09-13 08:54:01,975 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2024-09-13 08:54:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:01,975 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-09-13 08:54:01,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:01,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-09-13 08:54:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 08:54:01,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:01,976 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:01,976 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 08:54:01,977 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:01,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:01,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1513968721, now seen corresponding path program 1 times [2024-09-13 08:54:01,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532461092] [2024-09-13 08:54:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:01,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:02,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532461092] [2024-09-13 08:54:02,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532461092] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:54:02,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:54:02,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 08:54:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151846164] [2024-09-13 08:54:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:54:02,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 08:54:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 08:54:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:54:02,073 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:02,085 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-09-13 08:54:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 08:54:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-13 08:54:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:02,086 INFO L225 Difference]: With dead ends: 37 [2024-09-13 08:54:02,086 INFO L226 Difference]: Without dead ends: 22 [2024-09-13 08:54:02,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:54:02,088 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:54:02,089 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:54:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-13 08:54:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-13 08:54:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:54:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-09-13 08:54:02,095 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2024-09-13 08:54:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:02,096 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-09-13 08:54:02,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:02,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-09-13 08:54:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 08:54:02,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:02,097 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:02,097 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 08:54:02,097 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:02,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash 337912467, now seen corresponding path program 1 times [2024-09-13 08:54:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:02,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271187012] [2024-09-13 08:54:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:02,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:02,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271187012] [2024-09-13 08:54:02,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271187012] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:54:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725688378] [2024-09-13 08:54:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:02,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:02,209 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) [2024-09-13 08:54:02,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 08:54:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:02,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 08:54:02,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:54:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:02,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:54:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:02,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725688378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:54:02,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:54:02,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-09-13 08:54:02,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127445327] [2024-09-13 08:54:02,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:54:02,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 08:54:02,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 08:54:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:54:02,418 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:02,548 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2024-09-13 08:54:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:54:02,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 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 13 [2024-09-13 08:54:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:02,550 INFO L225 Difference]: With dead ends: 61 [2024-09-13 08:54:02,550 INFO L226 Difference]: Without dead ends: 45 [2024-09-13 08:54:02,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:54:02,553 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:54:02,554 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 176 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:54:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-13 08:54:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2024-09-13 08:54:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 08:54:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-09-13 08:54:02,567 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 13 [2024-09-13 08:54:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:02,568 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-09-13 08:54:02,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:02,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-09-13 08:54:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 08:54:02,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:02,574 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:02,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 08:54:02,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:02,775 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:02,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash -304397137, now seen corresponding path program 2 times [2024-09-13 08:54:02,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:02,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142626681] [2024-09-13 08:54:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:02,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:02,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:02,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:02,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142626681] [2024-09-13 08:54:02,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142626681] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:54:02,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657625181] [2024-09-13 08:54:02,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:54:02,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:02,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:02,921 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) [2024-09-13 08:54:02,922 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 08:54:02,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:54:02,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:54:02,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 08:54:02,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:54:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:02,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:54:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:03,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657625181] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:54:03,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:54:03,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-13 08:54:03,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414211888] [2024-09-13 08:54:03,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:54:03,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 08:54:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:03,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 08:54:03,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:54:03,111 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2024-09-13 08:54:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:03,317 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2024-09-13 08:54:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:54:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 16 [2024-09-13 08:54:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:03,323 INFO L225 Difference]: With dead ends: 55 [2024-09-13 08:54:03,323 INFO L226 Difference]: Without dead ends: 31 [2024-09-13 08:54:03,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:54:03,324 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:54:03,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:54:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-13 08:54:03,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-13 08:54:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:54:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-13 08:54:03,338 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 16 [2024-09-13 08:54:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:03,339 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-13 08:54:03,339 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2024-09-13 08:54:03,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-13 08:54:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 08:54:03,340 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:03,340 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:03,353 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 08:54:03,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:03,542 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:03,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2050377169, now seen corresponding path program 3 times [2024-09-13 08:54:03,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:03,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460829077] [2024-09-13 08:54:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:03,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:03,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:03,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:03,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460829077] [2024-09-13 08:54:03,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460829077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:54:03,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447856256] [2024-09-13 08:54:03,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:54:03,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:03,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:03,785 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) [2024-09-13 08:54:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 08:54:03,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 08:54:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:54:03,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 08:54:03,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:54:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:54:04,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 08:54:04,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447856256] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:54:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 08:54:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2024-09-13 08:54:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016587302] [2024-09-13 08:54:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:54:04,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 08:54:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 08:54:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:54:04,133 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:04,241 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-09-13 08:54:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 08:54:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 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 [2024-09-13 08:54:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:04,243 INFO L225 Difference]: With dead ends: 38 [2024-09-13 08:54:04,243 INFO L226 Difference]: Without dead ends: 36 [2024-09-13 08:54:04,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:54:04,244 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 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 [2024-09-13 08:54:04,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:54:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-13 08:54:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-09-13 08:54:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:54:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-09-13 08:54:04,257 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2024-09-13 08:54:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:04,258 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-09-13 08:54:04,258 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:54:04,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-09-13 08:54:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 08:54:04,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:04,259 INFO L216 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:04,273 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 08:54:04,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 08:54:04,464 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:04,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1587762515, now seen corresponding path program 1 times [2024-09-13 08:54:04,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:04,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182743201] [2024-09-13 08:54:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:04,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:04,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:04,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:54:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:54:04,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182743201] [2024-09-13 08:54:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182743201] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:54:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308966711] [2024-09-13 08:54:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:04,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:04,664 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) [2024-09-13 08:54:04,675 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 08:54:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:04,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 08:54:04,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:54:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:54:04,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:54:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:54:04,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308966711] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:54:04,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:54:04,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-09-13 08:54:04,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551046363] [2024-09-13 08:54:04,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:54:04,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:54:04,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:04,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:54:04,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:54:04,962 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 08:54:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:05,858 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2024-09-13 08:54:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-13 08:54:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-09-13 08:54:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:05,860 INFO L225 Difference]: With dead ends: 110 [2024-09-13 08:54:05,860 INFO L226 Difference]: Without dead ends: 81 [2024-09-13 08:54:05,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 08:54:05,862 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:54:05,863 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 269 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:54:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-13 08:54:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-13 08:54:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 08:54:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-09-13 08:54:05,892 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 29 [2024-09-13 08:54:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:05,893 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-09-13 08:54:05,893 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 08:54:05,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-09-13 08:54:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-13 08:54:05,895 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:05,895 INFO L216 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:05,911 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 08:54:06,095 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:06,096 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:06,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1307739729, now seen corresponding path program 2 times [2024-09-13 08:54:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:06,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624802819] [2024-09-13 08:54:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:06,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:06,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:06,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 08:54:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:06,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 08:54:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:06,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-13 08:54:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:06,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-13 08:54:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-13 08:54:06,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:06,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624802819] [2024-09-13 08:54:06,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624802819] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:54:06,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503913531] [2024-09-13 08:54:06,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:54:06,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:06,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:06,470 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) [2024-09-13 08:54:06,471 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 08:54:06,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:54:06,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:54:06,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 08:54:06,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:54:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-09-13 08:54:06,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:54:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-09-13 08:54:07,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503913531] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:54:07,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:54:07,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2024-09-13 08:54:07,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372388480] [2024-09-13 08:54:07,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:54:07,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 08:54:07,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:07,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 08:54:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:54:07,297 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 08:54:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:11,579 INFO L93 Difference]: Finished difference Result 256 states and 302 transitions. [2024-09-13 08:54:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-09-13 08:54:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2024-09-13 08:54:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:11,582 INFO L225 Difference]: With dead ends: 256 [2024-09-13 08:54:11,584 INFO L226 Difference]: Without dead ends: 181 [2024-09-13 08:54:11,593 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2024-09-13 08:54:11,594 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 97 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:54:11,595 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 537 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 08:54:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-13 08:54:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-09-13 08:54:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 164 states have internal predecessors, (176), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 08:54:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 202 transitions. [2024-09-13 08:54:11,639 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 202 transitions. Word has length 87 [2024-09-13 08:54:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:11,640 INFO L474 AbstractCegarLoop]: Abstraction has 181 states and 202 transitions. [2024-09-13 08:54:11,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 08:54:11,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 202 transitions. [2024-09-13 08:54:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-09-13 08:54:11,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:11,643 INFO L216 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:11,659 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 08:54:11,847 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-13 08:54:11,848 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:11,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash 709816549, now seen corresponding path program 3 times [2024-09-13 08:54:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:11,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561860501] [2024-09-13 08:54:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:54:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 08:54:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-13 08:54:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 08:54:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-13 08:54:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-09-13 08:54:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-13 08:54:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-13 08:54:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-13 08:54:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2024-09-13 08:54:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2024-09-13 08:54:12,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561860501] [2024-09-13 08:54:12,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561860501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:54:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579815818] [2024-09-13 08:54:12,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:54:12,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:12,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:12,549 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) [2024-09-13 08:54:12,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 08:54:12,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-13 08:54:12,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:54:12,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-13 08:54:12,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:54:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1447 proven. 1548 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2024-09-13 08:54:12,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:54:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1569 proven. 78 refuted. 0 times theorem prover too weak. 7083 trivial. 0 not checked. [2024-09-13 08:54:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579815818] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:54:13,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:54:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-13 08:54:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729851859] [2024-09-13 08:54:13,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:54:13,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-13 08:54:13,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-13 08:54:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2024-09-13 08:54:13,097 INFO L87 Difference]: Start difference. First operand 181 states and 202 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:54:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:54:17,797 INFO L93 Difference]: Finished difference Result 496 states and 678 transitions. [2024-09-13 08:54:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 08:54:17,798 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 211 [2024-09-13 08:54:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:54:17,801 INFO L225 Difference]: With dead ends: 496 [2024-09-13 08:54:17,801 INFO L226 Difference]: Without dead ends: 321 [2024-09-13 08:54:17,803 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 08:54:17,805 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:54:17,806 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 306 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:54:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-09-13 08:54:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2024-09-13 08:54:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 303 states have (on average 1.0429042904290429) internal successors, (316), 304 states have internal predecessors, (316), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 08:54:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 342 transitions. [2024-09-13 08:54:17,873 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 342 transitions. Word has length 211 [2024-09-13 08:54:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:54:17,874 INFO L474 AbstractCegarLoop]: Abstraction has 321 states and 342 transitions. [2024-09-13 08:54:17,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:54:17,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 342 transitions. [2024-09-13 08:54:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-09-13 08:54:17,879 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:54:17,879 INFO L216 NwaCegarLoop]: trace histogram [260, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:54:17,894 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 08:54:18,079 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:18,080 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:54:18,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:54:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -434978715, now seen corresponding path program 4 times [2024-09-13 08:54:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:54:18,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603776229] [2024-09-13 08:54:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:54:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:54:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:54:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-13 08:54:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 08:54:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 08:54:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-13 08:54:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2024-09-13 08:54:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2024-09-13 08:54:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2024-09-13 08:54:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2024-09-13 08:54:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2024-09-13 08:54:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2024-09-13 08:54:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:54:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 6591 proven. 351 refuted. 0 times theorem prover too weak. 29718 trivial. 0 not checked. [2024-09-13 08:54:19,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:54:19,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603776229] [2024-09-13 08:54:19,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603776229] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:54:19,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003956069] [2024-09-13 08:54:19,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:54:19,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:54:19,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:54:19,996 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) [2024-09-13 08:54:19,998 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 08:54:20,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:54:20,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:54:20,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-13 08:54:20,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:54:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 20 proven. 33181 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-09-13 08:54:21,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:54:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 196 proven. 33005 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2024-09-13 08:54:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003956069] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:54:22,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:54:22,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 73 [2024-09-13 08:54:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682839188] [2024-09-13 08:54:22,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:54:22,563 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-13 08:54:22,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:54:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-13 08:54:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2024-09-13 08:54:22,566 INFO L87 Difference]: Start difference. First operand 321 states and 342 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-13 08:56:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:36,590 INFO L93 Difference]: Finished difference Result 1018 states and 1118 transitions. [2024-09-13 08:56:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2024-09-13 08:56:36,591 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 351 [2024-09-13 08:56:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:36,594 INFO L225 Difference]: With dead ends: 1018 [2024-09-13 08:56:36,594 INFO L226 Difference]: Without dead ends: 703 [2024-09-13 08:56:36,620 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196022 ImplicationChecksByTransitivity, 131.5s TimeCoverageRelationStatistics Valid=29805, Invalid=426495, Unknown=0, NotChecked=0, Total=456300 [2024-09-13 08:56:36,620 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 396 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 11787 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 11823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 11787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:36,621 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 870 Invalid, 11823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 11787 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-13 08:56:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-09-13 08:56:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2024-09-13 08:56:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 673 states have (on average 1.037147102526003) internal successors, (698), 674 states have internal predecessors, (698), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-13 08:56:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 748 transitions. [2024-09-13 08:56:36,719 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 748 transitions. Word has length 351 [2024-09-13 08:56:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:36,720 INFO L474 AbstractCegarLoop]: Abstraction has 703 states and 748 transitions. [2024-09-13 08:56:36,720 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-13 08:56:36,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 748 transitions. [2024-09-13 08:56:36,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2024-09-13 08:56:36,736 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:36,736 INFO L216 NwaCegarLoop]: trace histogram [594, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:36,756 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 08:56:36,940 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:36,941 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:36,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash 674821009, now seen corresponding path program 5 times [2024-09-13 08:56:36,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114652820] [2024-09-13 08:56:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-13 08:56:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 08:56:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-13 08:56:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-13 08:56:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2024-09-13 08:56:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2024-09-13 08:56:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2024-09-13 08:56:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2024-09-13 08:56:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2024-09-13 08:56:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2024-09-13 08:56:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 385 [2024-09-13 08:56:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2024-09-13 08:56:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2024-09-13 08:56:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2024-09-13 08:56:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2024-09-13 08:56:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2024-09-13 08:56:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2024-09-13 08:56:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2024-09-13 08:56:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 665 [2024-09-13 08:56:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2024-09-13 08:56:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 735 [2024-09-13 08:56:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 770 [2024-09-13 08:56:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 16530 proven. 378 refuted. 0 times theorem prover too weak. 174195 trivial. 0 not checked. [2024-09-13 08:56:40,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:40,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114652820] [2024-09-13 08:56:40,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114652820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:40,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239929370] [2024-09-13 08:56:40,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:56:40,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:40,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:40,810 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) [2024-09-13 08:56:40,811 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 08:56:46,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-13 08:56:46,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:46,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-13 08:56:46,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59224 proven. 378 refuted. 0 times theorem prover too weak. 131501 trivial. 0 not checked. [2024-09-13 08:56:46,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59034 proven. 378 refuted. 0 times theorem prover too weak. 131691 trivial. 0 not checked. [2024-09-13 08:56:47,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239929370] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:47,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:47,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2024-09-13 08:56:47,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833441918] [2024-09-13 08:56:47,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:47,377 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-13 08:56:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-13 08:56:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=2467, Unknown=0, NotChecked=0, Total=3422 [2024-09-13 08:56:47,379 INFO L87 Difference]: Start difference. First operand 703 states and 748 transitions. Second operand has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:53,402 WARN L293 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 114 DAG size of output: 10 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)