./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_nondet.i --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 a9b967e5 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/loop-new/count_by_nondet.i -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 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --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-a9b967e-m [2024-09-12 15:27:17,333 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:27:17,392 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:27:17,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:27:17,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:27:17,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:27:17,413 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:27:17,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:27:17,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:27:17,414 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:27:17,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:27:17,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:27:17,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:27:17,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:27:17,415 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:27:17,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:27:17,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:27:17,418 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:27:17,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:27:17,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:27:17,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:27:17,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:27:17,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:27:17,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:27:17,422 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:27:17,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:27:17,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:27:17,423 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:27:17,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:27:17,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:27:17,423 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:27:17,423 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:27:17,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:27:17,424 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:27:17,424 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:27:17,424 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:27:17,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:27:17,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:27:17,424 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:27:17,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:27:17,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:27:17,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:27:17,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:27:17,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:27:17,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:27:17,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:27:17,681 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:27:17,681 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:27:17,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-new/count_by_nondet.i [2024-09-12 15:27:18,981 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:27:19,156 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:27:19,156 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-new/count_by_nondet.i [2024-09-12 15:27:19,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/99b8b1f6f/f6872f1644c24211a3ca9e3375da77fb/FLAG741c4441b [2024-09-12 15:27:19,538 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/99b8b1f6f/f6872f1644c24211a3ca9e3375da77fb [2024-09-12 15:27:19,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:27:19,541 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:27:19,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:27:19,541 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:27:19,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:27:19,545 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e646cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19, skipping insertion in model container [2024-09-12 15:27:19,546 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,562 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:27:19,675 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/loop-new/count_by_nondet.i[891,904] [2024-09-12 15:27:19,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:27:19,703 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:27:19,711 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/loop-new/count_by_nondet.i[891,904] [2024-09-12 15:27:19,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:27:19,729 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:27:19,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19 WrapperNode [2024-09-12 15:27:19,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:27:19,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:27:19,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:27:19,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:27:19,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,746 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:27:19,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:27:19,747 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:27:19,747 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:27:19,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:27:19,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,755 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,763 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]. [2024-09-12 15:27:19,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,763 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,764 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:27:19,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:27:19,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:27:19,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:27:19,787 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (1/1) ... [2024-09-12 15:27:19,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:27:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:19,843 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) [2024-09-12 15:27:19,847 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 [2024-09-12 15:27:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:27:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:27:19,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:27:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:27:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:27:19,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:27:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:27:19,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:27:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:27:19,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:27:19,924 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:27:19,925 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:27:20,039 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 15:27:20,039 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:27:20,058 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:27:20,058 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 15:27:20,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:27:20 BoogieIcfgContainer [2024-09-12 15:27:20,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:27:20,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:27:20,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:27:20,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:27:20,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:27:19" (1/3) ... [2024-09-12 15:27:20,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acb46fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:27:20, skipping insertion in model container [2024-09-12 15:27:20,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:27:19" (2/3) ... [2024-09-12 15:27:20,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acb46fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:27:20, skipping insertion in model container [2024-09-12 15:27:20,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:27:20" (3/3) ... [2024-09-12 15:27:20,068 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2024-09-12 15:27:20,082 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:27:20,082 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:27:20,126 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:27:20,132 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;@11f7ff44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:27:20,133 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:27:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2024-09-12 15:27:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 15:27:20,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:20,141 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:20,141 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:20,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 702528138, now seen corresponding path program 1 times [2024-09-12 15:27:20,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:20,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749763719] [2024-09-12 15:27:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:20,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:20,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:20,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749763719] [2024-09-12 15:27:20,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749763719] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:27:20,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:27:20,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 15:27:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908233664] [2024-09-12 15:27:20,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:27:20,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 15:27:20,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 15:27:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:27:20,295 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2024-09-12 15:27:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:20,314 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-09-12 15:27:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 15:27:20,316 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 [2024-09-12 15:27:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:20,320 INFO L225 Difference]: With dead ends: 31 [2024-09-12 15:27:20,321 INFO L226 Difference]: Without dead ends: 12 [2024-09-12 15:27:20,323 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 [2024-09-12 15:27:20,327 INFO L434 NwaCegarLoop]: 19 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, 19 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 [2024-09-12 15:27:20,328 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:27:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-12 15:27:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-12 15:27:20,357 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) [2024-09-12 15:27:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-09-12 15:27:20,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2024-09-12 15:27:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:20,360 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-09-12 15:27:20,360 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) [2024-09-12 15:27:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-09-12 15:27:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 15:27:20,362 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:20,362 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:20,362 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:27:20,363 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:20,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash 695139970, now seen corresponding path program 1 times [2024-09-12 15:27:20,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:20,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105010667] [2024-09-12 15:27:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:20,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:20,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105010667] [2024-09-12 15:27:20,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105010667] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:27:20,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:27:20,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 15:27:20,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936998204] [2024-09-12 15:27:20,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:27:20,452 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 15:27:20,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 15:27:20,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 15:27:20,453 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. 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) [2024-09-12 15:27:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:20,469 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2024-09-12 15:27:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 15:27:20,469 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 [2024-09-12 15:27:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:20,470 INFO L225 Difference]: With dead ends: 19 [2024-09-12 15:27:20,471 INFO L226 Difference]: Without dead ends: 14 [2024-09-12 15:27:20,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 15:27:20,473 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 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 [2024-09-12 15:27:20,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:27:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-12 15:27:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-09-12 15:27:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2024-09-12 15:27:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-09-12 15:27:20,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2024-09-12 15:27:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:20,479 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2024-09-12 15:27:20,479 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) [2024-09-12 15:27:20,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-09-12 15:27:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 15:27:20,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:20,481 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:20,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:27:20,482 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:20,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash -851873154, now seen corresponding path program 1 times [2024-09-12 15:27:20,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:20,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283806360] [2024-09-12 15:27:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:20,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283806360] [2024-09-12 15:27:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283806360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237476112] [2024-09-12 15:27:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:20,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:20,577 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) [2024-09-12 15:27:20,578 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:27:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 15:27:20,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:20,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237476112] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:20,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:20,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-12 15:27:20,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939249057] [2024-09-12 15:27:20,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:20,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:27:20,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:27:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:27:20,698 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:27:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:20,718 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2024-09-12 15:27:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:27:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-12 15:27:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:20,719 INFO L225 Difference]: With dead ends: 20 [2024-09-12 15:27:20,719 INFO L226 Difference]: Without dead ends: 15 [2024-09-12 15:27:20,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:27:20,720 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:20,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:27:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-12 15:27:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-12 15:27:20,725 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) [2024-09-12 15:27:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-09-12 15:27:20,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2024-09-12 15:27:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:20,726 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-09-12 15:27:20,727 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:27:20,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-09-12 15:27:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 15:27:20,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:20,728 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:20,741 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:20,929 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 [2024-09-12 15:27:20,929 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:20,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1472800902, now seen corresponding path program 2 times [2024-09-12 15:27:20,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:20,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728214731] [2024-09-12 15:27:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:20,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:21,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:21,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728214731] [2024-09-12 15:27:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728214731] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663018214] [2024-09-12 15:27:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:27:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:21,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:21,071 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) [2024-09-12 15:27:21,072 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:27:21,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:27:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:21,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 15:27:21,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:21,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:21,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663018214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:21,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:21,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-12 15:27:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822472893] [2024-09-12 15:27:21,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:21,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 15:27:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 15:27:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:27:21,233 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 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) [2024-09-12 15:27:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:21,283 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-09-12 15:27:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:27:21,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 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 [2024-09-12 15:27:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:21,284 INFO L225 Difference]: With dead ends: 32 [2024-09-12 15:27:21,285 INFO L226 Difference]: Without dead ends: 24 [2024-09-12 15:27:21,285 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-09-12 15:27:21,287 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:21,287 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:27:21,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-12 15:27:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-09-12 15:27:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:27:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-09-12 15:27:21,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2024-09-12 15:27:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:21,293 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-09-12 15:27:21,293 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 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) [2024-09-12 15:27:21,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-09-12 15:27:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 15:27:21,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:21,297 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:21,309 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:21,498 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 [2024-09-12 15:27:21,498 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:21,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2068523670, now seen corresponding path program 3 times [2024-09-12 15:27:21,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:21,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663007849] [2024-09-12 15:27:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:21,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:21,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:21,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663007849] [2024-09-12 15:27:21,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663007849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:21,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187698270] [2024-09-12 15:27:21,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:27:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:21,711 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) [2024-09-12 15:27:21,711 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:27:21,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 15:27:21,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:21,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 15:27:21,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:21,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:21,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187698270] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:21,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:21,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-12 15:27:21,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108585829] [2024-09-12 15:27:21,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:21,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:27:21,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:27:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:27:21,960 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 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) [2024-09-12 15:27:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:22,036 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-09-12 15:27:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:27:22,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 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 22 [2024-09-12 15:27:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:22,038 INFO L225 Difference]: With dead ends: 52 [2024-09-12 15:27:22,038 INFO L226 Difference]: Without dead ends: 40 [2024-09-12 15:27:22,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2024-09-12 15:27:22,039 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:22,039 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:27:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-12 15:27:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-09-12 15:27:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:27:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2024-09-12 15:27:22,045 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 22 [2024-09-12 15:27:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:22,045 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2024-09-12 15:27:22,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 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) [2024-09-12 15:27:22,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2024-09-12 15:27:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 15:27:22,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:22,049 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:22,065 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:22,249 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 [2024-09-12 15:27:22,250 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:22,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -130940598, now seen corresponding path program 4 times [2024-09-12 15:27:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928420516] [2024-09-12 15:27:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:22,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928420516] [2024-09-12 15:27:22,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928420516] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:22,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106086869] [2024-09-12 15:27:22,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:27:22,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:22,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:22,562 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) [2024-09-12 15:27:22,563 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:27:22,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:27:22,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:22,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:27:22,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:22,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:23,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106086869] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:23,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:23,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-12 15:27:23,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220209489] [2024-09-12 15:27:23,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:23,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 15:27:23,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 15:27:23,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=794, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:27:23,068 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 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) [2024-09-12 15:27:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:23,120 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2024-09-12 15:27:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 15:27:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 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 38 [2024-09-12 15:27:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:23,122 INFO L225 Difference]: With dead ends: 92 [2024-09-12 15:27:23,122 INFO L226 Difference]: Without dead ends: 72 [2024-09-12 15:27:23,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:27:23,123 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 88 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 [2024-09-12 15:27:23,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 88 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:27:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-12 15:27:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-09-12 15:27:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 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) [2024-09-12 15:27:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2024-09-12 15:27:23,132 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 38 [2024-09-12 15:27:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:23,132 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2024-09-12 15:27:23,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 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) [2024-09-12 15:27:23,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2024-09-12 15:27:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-12 15:27:23,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:23,134 INFO L216 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:23,146 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:27:23,334 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 [2024-09-12 15:27:23,334 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:23,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2022631158, now seen corresponding path program 5 times [2024-09-12 15:27:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:23,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718187452] [2024-09-12 15:27:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:23,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:24,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718187452] [2024-09-12 15:27:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718187452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800444027] [2024-09-12 15:27:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:27:24,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:24,094 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) [2024-09-12 15:27:24,096 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:27:24,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-09-12 15:27:24,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:24,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:27:24,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:24,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:25,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800444027] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:25,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:25,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-12 15:27:25,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616535227] [2024-09-12 15:27:25,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:25,460 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-12 15:27:25,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-12 15:27:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2090, Invalid=2602, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:27:25,464 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 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) [2024-09-12 15:27:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:25,603 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2024-09-12 15:27:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-12 15:27:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 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 70 [2024-09-12 15:27:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:25,605 INFO L225 Difference]: With dead ends: 172 [2024-09-12 15:27:25,605 INFO L226 Difference]: Without dead ends: 136 [2024-09-12 15:27:25,611 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2096, Invalid=2734, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 15:27:25,612 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:25,612 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 149 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-12 15:27:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2024-09-12 15:27:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:27:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2024-09-12 15:27:25,631 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 70 [2024-09-12 15:27:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:25,633 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2024-09-12 15:27:25,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 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) [2024-09-12 15:27:25,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2024-09-12 15:27:25,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-12 15:27:25,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:25,644 INFO L216 NwaCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:25,657 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:27:25,845 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 15:27:25,846 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:25,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:25,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1191032694, now seen corresponding path program 6 times [2024-09-12 15:27:25,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:25,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109065960] [2024-09-12 15:27:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:25,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109065960] [2024-09-12 15:27:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109065960] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:28,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233748851] [2024-09-12 15:27:28,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:27:28,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:28,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:28,023 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) [2024-09-12 15:27:28,025 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:27:28,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2024-09-12 15:27:28,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:28,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-12 15:27:28,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:28,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233748851] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:31,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:31,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2024-09-12 15:27:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720382792] [2024-09-12 15:27:31,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:31,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-09-12 15:27:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:31,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-09-12 15:27:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8266, Invalid=9290, Unknown=0, NotChecked=0, Total=17556 [2024-09-12 15:27:31,573 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 133 states, 133 states have (on average 1.962406015037594) internal successors, (261), 131 states have internal predecessors, (261), 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) [2024-09-12 15:27:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:31,969 INFO L93 Difference]: Finished difference Result 332 states and 395 transitions. [2024-09-12 15:27:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-09-12 15:27:31,970 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.962406015037594) internal successors, (261), 131 states have internal predecessors, (261), 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 134 [2024-09-12 15:27:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:31,972 INFO L225 Difference]: With dead ends: 332 [2024-09-12 15:27:31,972 INFO L226 Difference]: Without dead ends: 264 [2024-09-12 15:27:31,976 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8272, Invalid=9550, Unknown=0, NotChecked=0, Total=17822 [2024-09-12 15:27:31,976 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 221 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:31,976 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 272 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-12 15:27:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2024-09-12 15:27:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 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) [2024-09-12 15:27:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2024-09-12 15:27:32,001 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 134 [2024-09-12 15:27:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:32,001 INFO L474 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2024-09-12 15:27:32,001 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.962406015037594) internal successors, (261), 131 states have internal predecessors, (261), 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) [2024-09-12 15:27:32,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2024-09-12 15:27:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-09-12 15:27:32,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:32,009 INFO L216 NwaCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:32,023 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 15:27:32,209 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:32,210 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:32,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -126834806, now seen corresponding path program 7 times [2024-09-12 15:27:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:32,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008641839] [2024-09-12 15:27:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:38,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:38,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:38,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008641839] [2024-09-12 15:27:38,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008641839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:38,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489728381] [2024-09-12 15:27:38,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:27:38,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:38,958 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) [2024-09-12 15:27:38,959 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:27:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-09-12 15:27:39,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:39,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:27:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489728381] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:51,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2024-09-12 15:27:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462401009] [2024-09-12 15:27:51,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:51,761 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2024-09-12 15:27:51,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2024-09-12 15:27:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32906, Invalid=34954, Unknown=0, NotChecked=0, Total=67860 [2024-09-12 15:27:51,771 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 261 states, 261 states have (on average 1.9808429118773947) internal successors, (517), 259 states have internal predecessors, (517), 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) [2024-09-12 15:27:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:53,319 INFO L93 Difference]: Finished difference Result 652 states and 779 transitions. [2024-09-12 15:27:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2024-09-12 15:27:53,325 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 1.9808429118773947) internal successors, (517), 259 states have internal predecessors, (517), 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 262 [2024-09-12 15:27:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:53,327 INFO L225 Difference]: With dead ends: 652 [2024-09-12 15:27:53,328 INFO L226 Difference]: Without dead ends: 520 [2024-09-12 15:27:53,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 395 SyntacticMatches, 2 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=32912, Invalid=35470, Unknown=0, NotChecked=0, Total=68382 [2024-09-12 15:27:53,332 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 491 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:53,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 463 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2024-09-12 15:27:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 519. [2024-09-12 15:27:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 514 states have (on average 1.0019455252918288) internal successors, (515), 514 states have internal predecessors, (515), 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) [2024-09-12 15:27:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 519 transitions. [2024-09-12 15:27:53,367 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 519 transitions. Word has length 262 [2024-09-12 15:27:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:53,368 INFO L474 AbstractCegarLoop]: Abstraction has 519 states and 519 transitions. [2024-09-12 15:27:53,369 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 1.9808429118773947) internal successors, (517), 259 states have internal predecessors, (517), 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) [2024-09-12 15:27:53,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 519 transitions. [2024-09-12 15:27:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2024-09-12 15:27:53,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:53,373 INFO L216 NwaCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:53,386 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:53,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:53,574 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:53,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1753048458, now seen corresponding path program 8 times [2024-09-12 15:27:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:53,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596767016] [2024-09-12 15:27:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:53,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:20,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:28:20,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:20,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596767016] [2024-09-12 15:28:20,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596767016] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:20,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390020715] [2024-09-12 15:28:20,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:28:20,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:20,875 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) [2024-09-12 15:28:20,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:28:21,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:28:21,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:21,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 258 conjuncts are in the unsatisfiable core [2024-09-12 15:28:21,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:28:21,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:29:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390020715] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:10,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:10,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [259, 259, 259] total 517 [2024-09-12 15:29:10,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323995517] [2024-09-12 15:29:10,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:10,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 517 states [2024-09-12 15:29:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 517 interpolants. [2024-09-12 15:29:10,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131338, Invalid=135434, Unknown=0, NotChecked=0, Total=266772 [2024-09-12 15:29:10,875 INFO L87 Difference]: Start difference. First operand 519 states and 519 transitions. Second operand has 517 states, 517 states have (on average 1.990328820116054) internal successors, (1029), 515 states have internal predecessors, (1029), 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) [2024-09-12 15:29:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:25,487 INFO L93 Difference]: Finished difference Result 1292 states and 1547 transitions. [2024-09-12 15:29:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 514 states. [2024-09-12 15:29:25,488 INFO L78 Accepts]: Start accepts. Automaton has has 517 states, 517 states have (on average 1.990328820116054) internal successors, (1029), 515 states have internal predecessors, (1029), 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 518 [2024-09-12 15:29:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:25,492 INFO L225 Difference]: With dead ends: 1292 [2024-09-12 15:29:25,492 INFO L226 Difference]: Without dead ends: 1032 [2024-09-12 15:29:25,502 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1297 GetRequests, 779 SyntacticMatches, 2 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=131344, Invalid=136462, Unknown=0, NotChecked=0, Total=267806 [2024-09-12 15:29:25,503 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1059 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:25,503 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 865 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:29:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2024-09-12 15:29:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1031. [2024-09-12 15:29:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1026 states have (on average 1.0009746588693957) internal successors, (1027), 1026 states have internal predecessors, (1027), 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) [2024-09-12 15:29:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1031 transitions. [2024-09-12 15:29:25,548 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1031 transitions. Word has length 518 [2024-09-12 15:29:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:25,548 INFO L474 AbstractCegarLoop]: Abstraction has 1031 states and 1031 transitions. [2024-09-12 15:29:25,549 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 517 states, 517 states have (on average 1.990328820116054) internal successors, (1029), 515 states have internal predecessors, (1029), 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) [2024-09-12 15:29:25,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1031 transitions. [2024-09-12 15:29:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2024-09-12 15:29:25,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:25,564 INFO L216 NwaCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:25,580 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 15:29:25,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:25,765 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:25,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash 223797642, now seen corresponding path program 9 times [2024-09-12 15:29:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637940299] [2024-09-12 15:29:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:25,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:31:38,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:31:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:31:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:31:38,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:31:38,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637940299] [2024-09-12 15:31:38,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637940299] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:31:38,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546934395] [2024-09-12 15:31:38,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:31:38,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:31:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:31:38,370 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:31:38,373 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process