./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/count_up_down-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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/count_up_down-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 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:30:50,894 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:30:50,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:30:50,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:30:50,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:30:50,996 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:30:50,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:30:50,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:30:50,997 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:30:50,998 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:30:51,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:30:51,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:30:51,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:30:51,004 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:30:51,004 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:30:51,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:30:51,005 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:30:51,005 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:30:51,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:30:51,006 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:30:51,009 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:30:51,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:30:51,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:30:51,010 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:30:51,010 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:30:51,010 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:30:51,011 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:30:51,011 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:30:51,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:30:51,012 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:30:51,012 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:30:51,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:30:51,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:30:51,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:30:51,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:30:51,013 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:30:51,014 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:30:51,014 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:30:51,014 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:30:51,014 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:30:51,015 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:30:51,017 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:30:51,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:30:51,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:30:51,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:30:51,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:30:51,354 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:30:51,355 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:30:51,356 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/count_up_down-1.c [2024-09-18 15:30:52,786 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:30:52,954 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:30:52,955 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/count_up_down-1.c [2024-09-18 15:30:52,962 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e56bf32a4/fbdcae51819b4ef6814e137f18698d07/FLAGca4b877c0 [2024-09-18 15:30:52,975 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e56bf32a4/fbdcae51819b4ef6814e137f18698d07 [2024-09-18 15:30:52,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:30:52,979 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:30:52,984 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:30:52,984 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:30:52,989 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:30:52,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:30:52" (1/1) ... [2024-09-18 15:30:52,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b592913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:52, skipping insertion in model container [2024-09-18 15:30:52,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:30:52" (1/1) ... [2024-09-18 15:30:53,012 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:30:53,190 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2024-09-18 15:30:53,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:30:53,209 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:30:53,220 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2024-09-18 15:30:53,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:30:53,241 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:30:53,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53 WrapperNode [2024-09-18 15:30:53,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:30:53,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:30:53,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:30:53,246 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:30:53,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,260 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,267 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:30:53,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:30:53,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:30:53,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:30:53,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:30:53,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,280 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,295 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]. [2024-09-18 15:30:53,295 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,298 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,300 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,302 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:30:53,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:30:53,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:30:53,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:30:53,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (1/1) ... [2024-09-18 15:30:53,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:30:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:30:53,348 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) [2024-09-18 15:30:53,353 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 [2024-09-18 15:30:53,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:30:53,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:30:53,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:30:53,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:30:53,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:30:53,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:30:53,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:30:53,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:30:53,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:30:53,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:30:53,454 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:30:53,456 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:30:53,568 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 15:30:53,568 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:30:53,619 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:30:53,619 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 15:30:53,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:30:53 BoogieIcfgContainer [2024-09-18 15:30:53,619 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:30:53,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:30:53,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:30:53,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:30:53,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:30:52" (1/3) ... [2024-09-18 15:30:53,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2d8c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:30:53, skipping insertion in model container [2024-09-18 15:30:53,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:30:53" (2/3) ... [2024-09-18 15:30:53,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2d8c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:30:53, skipping insertion in model container [2024-09-18 15:30:53,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:30:53" (3/3) ... [2024-09-18 15:30:53,635 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2024-09-18 15:30:53,650 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:30:53,650 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:30:53,702 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:30:53,709 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;@4596dbd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:30:53,709 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:30:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:30:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 15:30:53,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:53,724 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:30:53,724 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:53,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1861917190, now seen corresponding path program 1 times [2024-09-18 15:30:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:53,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599046965] [2024-09-18 15:30:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:53,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:53,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:53,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599046965] [2024-09-18 15:30:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599046965] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:30:53,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:30:53,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:30:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075585022] [2024-09-18 15:30:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:30:53,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:30:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:30:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:30:53,955 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-09-18 15:30:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:30:53,994 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-09-18 15:30:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:30:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2024-09-18 15:30:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:30:54,002 INFO L225 Difference]: With dead ends: 28 [2024-09-18 15:30:54,002 INFO L226 Difference]: Without dead ends: 11 [2024-09-18 15:30:54,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:30:54,011 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:30:54,012 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:30:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-09-18 15:30:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-09-18 15:30:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-09-18 15:30:54,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 10 [2024-09-18 15:30:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:30:54,039 INFO L474 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-09-18 15:30:54,039 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-09-18 15:30:54,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-09-18 15:30:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 15:30:54,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:54,040 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:30:54,040 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:30:54,041 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:54,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:54,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1858223106, now seen corresponding path program 1 times [2024-09-18 15:30:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:54,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766239309] [2024-09-18 15:30:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:54,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:54,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:54,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766239309] [2024-09-18 15:30:54,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766239309] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:30:54,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:30:54,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:30:54,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543557787] [2024-09-18 15:30:54,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:30:54,404 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:30:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:30:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:30:54,407 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2024-09-18 15:30:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:30:54,448 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-09-18 15:30:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:30:54,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 [2024-09-18 15:30:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:30:54,449 INFO L225 Difference]: With dead ends: 17 [2024-09-18 15:30:54,449 INFO L226 Difference]: Without dead ends: 12 [2024-09-18 15:30:54,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:30:54,451 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:30:54,452 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:30:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-18 15:30:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-18 15:30:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-09-18 15:30:54,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2024-09-18 15:30:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:30:54,458 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-09-18 15:30:54,458 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2024-09-18 15:30:54,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-09-18 15:30:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 15:30:54,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:54,460 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:30:54,460 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:30:54,460 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:54,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1806802702, now seen corresponding path program 1 times [2024-09-18 15:30:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:54,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240783180] [2024-09-18 15:30:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:54,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:54,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:54,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240783180] [2024-09-18 15:30:54,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240783180] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:30:54,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339428038] [2024-09-18 15:30:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:54,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:30:54,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:30:54,808 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) [2024-09-18 15:30:54,809 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:30:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:54,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 15:30:54,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:30:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:55,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:30:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339428038] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:30:55,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:30:55,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-18 15:30:55,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872155099] [2024-09-18 15:30:55,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:30:55,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:30:55,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:30:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:30:55,183 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:30:55,312 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-09-18 15:30:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 15:30:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-18 15:30:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:30:55,313 INFO L225 Difference]: With dead ends: 21 [2024-09-18 15:30:55,314 INFO L226 Difference]: Without dead ends: 15 [2024-09-18 15:30:55,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-09-18 15:30:55,316 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:30:55,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:30:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-18 15:30:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-18 15:30:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-09-18 15:30:55,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2024-09-18 15:30:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:30:55,322 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-09-18 15:30:55,322 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:55,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-09-18 15:30:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:30:55,324 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:55,324 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:30:55,342 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 15:30:55,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:30:55,528 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:55,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:55,529 INFO L85 PathProgramCache]: Analyzing trace with hash -519528702, now seen corresponding path program 2 times [2024-09-18 15:30:55,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:55,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955963683] [2024-09-18 15:30:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:55,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:56,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:56,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955963683] [2024-09-18 15:30:56,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955963683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:30:56,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705582209] [2024-09-18 15:30:56,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:30:56,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:30:56,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:30:56,048 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) [2024-09-18 15:30:56,051 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:30:56,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:30:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:30:56,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:30:56,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:30:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:56,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:30:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:56,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705582209] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:30:56,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:30:56,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-09-18 15:30:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892629003] [2024-09-18 15:30:56,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:30:56,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:30:56,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:30:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:30:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:30:56,702 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:30:57,329 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-09-18 15:30:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:30:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-18 15:30:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:30:57,331 INFO L225 Difference]: With dead ends: 27 [2024-09-18 15:30:57,331 INFO L226 Difference]: Without dead ends: 21 [2024-09-18 15:30:57,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-18 15:30:57,332 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:30:57,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 55 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:30:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-18 15:30:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-18 15:30:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2024-09-18 15:30:57,341 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2024-09-18 15:30:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:30:57,342 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2024-09-18 15:30:57,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:30:57,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2024-09-18 15:30:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:30:57,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:30:57,343 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:30:57,359 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:30:57,547 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:30:57,548 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:30:57,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:30:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash 899179394, now seen corresponding path program 3 times [2024-09-18 15:30:57,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:30:57,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461023292] [2024-09-18 15:30:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:30:57,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:30:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:58,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:30:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:30:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:58,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:30:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461023292] [2024-09-18 15:30:58,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461023292] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:30:58,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033474678] [2024-09-18 15:30:58,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:30:58,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:30:58,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:30:58,381 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) [2024-09-18 15:30:58,384 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:30:58,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:30:58,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:30:58,481 WARN L260 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 15:30:58,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:30:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:30:59,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:00,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033474678] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:00,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:00,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2024-09-18 15:31:00,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860824801] [2024-09-18 15:31:00,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:00,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-18 15:31:00,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:00,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-18 15:31:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 15:31:00,192 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 39 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:31:07,617 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-18 15:31:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-18 15:31:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-18 15:31:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:31:07,619 INFO L225 Difference]: With dead ends: 39 [2024-09-18 15:31:07,619 INFO L226 Difference]: Without dead ends: 33 [2024-09-18 15:31:07,620 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=653, Invalid=1897, Unknown=0, NotChecked=0, Total=2550 [2024-09-18 15:31:07,621 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:31:07,621 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 109 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:31:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-18 15:31:07,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-18 15:31:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2024-09-18 15:31:07,635 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2024-09-18 15:31:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:31:07,636 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2024-09-18 15:31:07,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:31:07,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2024-09-18 15:31:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:31:07,637 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:31:07,637 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:31:07,653 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:31:07,841 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:07,842 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:31:07,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:31:07,843 INFO L85 PathProgramCache]: Analyzing trace with hash -470823806, now seen corresponding path program 4 times [2024-09-18 15:31:07,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:31:07,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136585180] [2024-09-18 15:31:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:31:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:31:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:09,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:31:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:31:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:09,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:31:09,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136585180] [2024-09-18 15:31:09,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136585180] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:31:09,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248072453] [2024-09-18 15:31:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:31:09,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:31:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:31:09,697 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) [2024-09-18 15:31:09,699 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:31:09,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:31:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:31:09,902 WARN L260 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-18 15:31:09,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:31:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:11,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:31:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:31:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248072453] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:31:14,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:31:14,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2024-09-18 15:31:14,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490442846] [2024-09-18 15:31:14,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:31:14,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-18 15:31:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:31:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-18 15:31:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=4364, Unknown=0, NotChecked=0, Total=5550 [2024-09-18 15:31:14,730 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 75 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:34:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:34:23,574 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2024-09-18 15:34:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-18 15:34:23,574 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-18 15:34:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:34:23,575 INFO L225 Difference]: With dead ends: 63 [2024-09-18 15:34:23,575 INFO L226 Difference]: Without dead ends: 57 [2024-09-18 15:34:23,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 192.9s TimeCoverageRelationStatistics Valid=2717, Invalid=6985, Unknown=0, NotChecked=0, Total=9702 [2024-09-18 15:34:23,578 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:34:23,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 181 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-18 15:34:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-18 15:34:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-18 15:34:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:34:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2024-09-18 15:34:23,610 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2024-09-18 15:34:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:34:23,611 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2024-09-18 15:34:23,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:34:23,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:34:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2024-09-18 15:34:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-18 15:34:23,612 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:34:23,612 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:34:23,626 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:34:23,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:34:23,817 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:34:23,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:34:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash 777920130, now seen corresponding path program 5 times [2024-09-18 15:34:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:34:23,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417333485] [2024-09-18 15:34:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:34:23,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:34:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:34:28,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:34:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:34:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:34:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:34:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417333485] [2024-09-18 15:34:28,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417333485] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:34:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916600453] [2024-09-18 15:34:28,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:34:28,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:34:28,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:34:28,595 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) [2024-09-18 15:34:28,596 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:34:30,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-18 15:34:30,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:34:30,918 WARN L260 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-18 15:34:30,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:34:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:34:34,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:34:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:34:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916600453] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:34:47,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:34:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 147 [2024-09-18 15:34:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112625522] [2024-09-18 15:34:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:34:47,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2024-09-18 15:34:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:34:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2024-09-18 15:34:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4666, Invalid=16796, Unknown=0, NotChecked=0, Total=21462 [2024-09-18 15:34:47,601 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 147 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)