./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/recursive-simple/id_i25_o25-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 --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 16:30:55,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:30:55,639 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:30:55,645 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:30:55,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:30:55,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:30:55,677 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:30:55,677 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:30:55,678 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:30:55,679 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:30:55,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:30:55,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:30:55,680 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:30:55,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:30:55,682 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:30:55,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:30:55,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:30:55,683 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:30:55,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:30:55,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:30:55,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:30:55,688 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:30:55,688 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:30:55,688 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:30:55,688 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:30:55,689 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:30:55,689 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:30:55,689 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:30:55,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:30:55,689 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:30:55,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:30:55,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:30:55,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:30:55,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:30:55,691 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:30:55,691 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:30:55,691 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:30:55,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:30:55,693 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:30:55,694 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:30:55,694 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:30:55,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:30:55,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:30:56,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:30:56,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:30:56,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:30:56,071 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:30:56,071 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:30:56,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-12 16:30:57,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:30:57,845 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:30:57,846 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-12 16:30:57,852 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/205db0eda/63ccf750c11c4d30a981f6ff57152554/FLAG848d268d2 [2024-09-12 16:30:58,249 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/205db0eda/63ccf750c11c4d30a981f6ff57152554 [2024-09-12 16:30:58,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:30:58,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:30:58,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:30:58,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:30:58,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:30:58,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0540c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58, skipping insertion in model container [2024-09-12 16:30:58,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,277 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:30:58,410 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/recursive-simple/id_i25_o25-1.c[454,467] [2024-09-12 16:30:58,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:30:58,424 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:30:58,437 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/recursive-simple/id_i25_o25-1.c[454,467] [2024-09-12 16:30:58,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:30:58,454 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:30:58,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58 WrapperNode [2024-09-12 16:30:58,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:30:58,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:30:58,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:30:58,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:30:58,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,480 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:30:58,481 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:30:58,482 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:30:58,482 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:30:58,482 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:30:58,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,494 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,505 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 16:30:58,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,516 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:30:58,517 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:30:58,517 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:30:58,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:30:58,518 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (1/1) ... [2024-09-12 16:30:58,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:30:58,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:30:58,559 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 16:30:58,567 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 16:30:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:30:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:30:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:30:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:30:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:30:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:30:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:30:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:30:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-12 16:30:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-12 16:30:58,673 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:30:58,675 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:30:58,810 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 16:30:58,811 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:30:58,836 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:30:58,837 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-12 16:30:58,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:30:58 BoogieIcfgContainer [2024-09-12 16:30:58,838 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:30:58,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:30:58,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:30:58,843 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:30:58,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:30:58" (1/3) ... [2024-09-12 16:30:58,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1130c480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:30:58, skipping insertion in model container [2024-09-12 16:30:58,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:30:58" (2/3) ... [2024-09-12 16:30:58,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1130c480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:30:58, skipping insertion in model container [2024-09-12 16:30:58,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:30:58" (3/3) ... [2024-09-12 16:30:58,857 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2024-09-12 16:30:58,873 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:30:58,873 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:30:58,936 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:30:58,943 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;@f61e1b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:30:58,944 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:30:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 16:30:58,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-12 16:30:58,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:30:58,954 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:30:58,954 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:30:58,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:30:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-12 16:30:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:30:58,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905520877] [2024-09-12 16:30:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:30:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:30:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:30:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:30:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,225 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 16:30:59,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:30:59,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905520877] [2024-09-12 16:30:59,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905520877] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:30:59,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:30:59,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:30:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873361305] [2024-09-12 16:30:59,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:30:59,235 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:30:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:30:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:30:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:30:59,260 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 16:30:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:30:59,348 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-12 16:30:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:30:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-12 16:30:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:30:59,358 INFO L225 Difference]: With dead ends: 30 [2024-09-12 16:30:59,358 INFO L226 Difference]: Without dead ends: 18 [2024-09-12 16:30:59,361 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:30:59,366 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:30:59,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:30:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-12 16:30:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-12 16:30:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-12 16:30:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-12 16:30:59,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-12 16:30:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:30:59,413 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-12 16:30:59,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 16:30:59,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:30:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-12 16:30:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 16:30:59,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:30:59,417 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:30:59,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:30:59,419 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:30:59,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:30:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-12 16:30:59,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:30:59,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072528421] [2024-09-12 16:30:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:30:59,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:30:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:30:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:30:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:30:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:30:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:30:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072528421] [2024-09-12 16:30:59,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072528421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:30:59,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123767595] [2024-09-12 16:30:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:30:59,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:30:59,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:30:59,720 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 16:30:59,722 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 16:30:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:30:59,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 16:30:59,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:30:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 16:30:59,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:31:00,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123767595] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:00,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:00,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-09-12 16:31:00,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811219577] [2024-09-12 16:31:00,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:00,142 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 16:31:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 16:31:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-12 16:31:00,147 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:31:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:00,201 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-12 16:31:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 16:31:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2024-09-12 16:31:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:00,203 INFO L225 Difference]: With dead ends: 25 [2024-09-12 16:31:00,203 INFO L226 Difference]: Without dead ends: 21 [2024-09-12 16:31:00,204 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:31:00,205 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:00,205 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:31:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-12 16:31:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-12 16:31:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 16:31:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-12 16:31:00,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-12 16:31:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:00,212 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-12 16:31:00,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:31:00,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-12 16:31:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 16:31:00,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:00,216 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:00,232 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:31:00,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:00,417 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:00,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-12 16:31:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431401692] [2024-09-12 16:31:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:00,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:00,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:00,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:00,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 16:31:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431401692] [2024-09-12 16:31:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431401692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602880876] [2024-09-12 16:31:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:31:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:00,654 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 16:31:00,655 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 16:31:00,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:31:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:00,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 16:31:00,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 16:31:00,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 16:31:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602880876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:01,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:01,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2024-09-12 16:31:01,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099708471] [2024-09-12 16:31:01,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:01,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 16:31:01,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:01,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 16:31:01,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-09-12 16:31:01,138 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:31:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:01,211 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-12 16:31:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 16:31:01,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-09-12 16:31:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:01,212 INFO L225 Difference]: With dead ends: 28 [2024-09-12 16:31:01,212 INFO L226 Difference]: Without dead ends: 24 [2024-09-12 16:31:01,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:31:01,214 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:01,214 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:31:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-12 16:31:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-12 16:31:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 16:31:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-12 16:31:01,226 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-12 16:31:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:01,226 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-12 16:31:01,226 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:31:01,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-12 16:31:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 16:31:01,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:01,228 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:01,245 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 16:31:01,432 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:01,433 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:01,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-12 16:31:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:01,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032355769] [2024-09-12 16:31:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:01,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:01,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:01,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:01,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:01,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:01,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 16:31:01,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:01,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032355769] [2024-09-12 16:31:01,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032355769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:01,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000265267] [2024-09-12 16:31:01,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:31:01,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:01,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:01,637 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 16:31:01,638 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 16:31:01,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:31:01,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:01,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 16:31:01,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 16:31:01,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 16:31:02,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000265267] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:02,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2024-09-12 16:31:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111224607] [2024-09-12 16:31:02,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:02,300 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 16:31:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 16:31:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:31:02,301 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-12 16:31:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:02,378 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-12 16:31:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 16:31:02,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 31 [2024-09-12 16:31:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:02,380 INFO L225 Difference]: With dead ends: 31 [2024-09-12 16:31:02,381 INFO L226 Difference]: Without dead ends: 27 [2024-09-12 16:31:02,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-09-12 16:31:02,382 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:02,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:31:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-12 16:31:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-12 16:31:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 16:31:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-12 16:31:02,392 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-12 16:31:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:02,395 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-12 16:31:02,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-12 16:31:02,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-12 16:31:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 16:31:02,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:02,397 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:02,416 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 16:31:02,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:02,602 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:02,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-12 16:31:02,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:02,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591672436] [2024-09-12 16:31:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:02,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:02,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:02,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:02,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:02,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:02,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 16:31:02,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591672436] [2024-09-12 16:31:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591672436] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412115129] [2024-09-12 16:31:02,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:31:02,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:02,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:02,842 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 16:31:02,844 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 16:31:02,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:31:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:02,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 16:31:02,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 16:31:02,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 16:31:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412115129] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:03,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:03,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2024-09-12 16:31:03,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560434966] [2024-09-12 16:31:03,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:03,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 16:31:03,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 16:31:03,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-09-12 16:31:03,746 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-12 16:31:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:03,828 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-12 16:31:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:31:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 37 [2024-09-12 16:31:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:03,829 INFO L225 Difference]: With dead ends: 34 [2024-09-12 16:31:03,829 INFO L226 Difference]: Without dead ends: 30 [2024-09-12 16:31:03,830 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:31:03,831 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:03,831 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 90 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:31:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-12 16:31:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-12 16:31:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 16:31:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-12 16:31:03,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-12 16:31:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:03,837 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-12 16:31:03,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-12 16:31:03,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-12 16:31:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 16:31:03,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:03,839 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:03,856 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 16:31:04,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:04,039 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:04,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:04,040 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-12 16:31:04,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:04,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864289400] [2024-09-12 16:31:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:04,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 16:31:04,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864289400] [2024-09-12 16:31:04,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864289400] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871460156] [2024-09-12 16:31:04,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:31:04,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:04,329 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 16:31:04,330 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 16:31:04,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 16:31:04,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:04,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 16:31:04,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 16:31:04,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 16:31:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871460156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:05,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:05,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2024-09-12 16:31:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248600839] [2024-09-12 16:31:05,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:05,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 16:31:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 16:31:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-09-12 16:31:05,551 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-12 16:31:05,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:05,641 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-12 16:31:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 16:31:05,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 43 [2024-09-12 16:31:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:05,642 INFO L225 Difference]: With dead ends: 37 [2024-09-12 16:31:05,642 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 16:31:05,643 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-09-12 16:31:05,644 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:05,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 86 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 16:31:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-12 16:31:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:31:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-12 16:31:05,654 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-12 16:31:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:05,655 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-12 16:31:05,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-12 16:31:05,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-12 16:31:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 16:31:05,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:05,656 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 16:31:05,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 16:31:05,857 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:05,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-12 16:31:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755161333] [2024-09-12 16:31:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:05,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:05,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:05,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:05,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:06,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:06,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:06,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:06,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:06,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 16:31:06,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755161333] [2024-09-12 16:31:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755161333] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139556778] [2024-09-12 16:31:06,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 16:31:06,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:06,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:06,187 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 16:31:06,189 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 16:31:06,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 16:31:06,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:06,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 16:31:06,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 16:31:06,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 16:31:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139556778] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:07,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:07,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2024-09-12 16:31:07,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508631814] [2024-09-12 16:31:07,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:07,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 16:31:07,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 16:31:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:31:07,736 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-12 16:31:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:07,826 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-12 16:31:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 16:31:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 49 [2024-09-12 16:31:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:07,828 INFO L225 Difference]: With dead ends: 40 [2024-09-12 16:31:07,828 INFO L226 Difference]: Without dead ends: 36 [2024-09-12 16:31:07,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:31:07,830 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:07,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:31:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-12 16:31:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-12 16:31:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 16:31:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-12 16:31:07,837 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-12 16:31:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:07,837 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-12 16:31:07,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-12 16:31:07,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-12 16:31:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 16:31:07,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:07,839 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:07,854 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 16:31:08,043 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:08,044 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:08,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-12 16:31:08,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:08,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343604044] [2024-09-12 16:31:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-12 16:31:08,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:08,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343604044] [2024-09-12 16:31:08,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343604044] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:08,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910741491] [2024-09-12 16:31:08,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 16:31:08,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:08,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:08,429 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 16:31:08,431 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 16:31:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:08,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 16:31:08,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-12 16:31:08,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 16:31:10,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910741491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:10,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:10,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2024-09-12 16:31:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161637598] [2024-09-12 16:31:10,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:10,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 16:31:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 16:31:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-09-12 16:31:10,352 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-12 16:31:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:10,458 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-12 16:31:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:31:10,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 55 [2024-09-12 16:31:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:10,459 INFO L225 Difference]: With dead ends: 43 [2024-09-12 16:31:10,460 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 16:31:10,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2024-09-12 16:31:10,461 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:10,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 16:31:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-12 16:31:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-12 16:31:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-12 16:31:10,474 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-12 16:31:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:10,474 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-12 16:31:10,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-12 16:31:10,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-12 16:31:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-12 16:31:10,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:10,476 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:10,494 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 16:31:10,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:10,677 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:10,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-12 16:31:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:10,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128181517] [2024-09-12 16:31:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:10,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:10,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:10,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:10,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:10,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:10,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:10,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:11,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:11,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:11,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-12 16:31:11,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128181517] [2024-09-12 16:31:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128181517] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80205032] [2024-09-12 16:31:11,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:31:11,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:11,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:11,098 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 16:31:11,099 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 16:31:11,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:31:11,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:11,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 16:31:11,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-12 16:31:11,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 16:31:13,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80205032] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:13,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:13,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2024-09-12 16:31:13,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416156718] [2024-09-12 16:31:13,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:13,779 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 16:31:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 16:31:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-09-12 16:31:13,780 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-12 16:31:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:13,893 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-12 16:31:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:31:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 61 [2024-09-12 16:31:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:13,895 INFO L225 Difference]: With dead ends: 46 [2024-09-12 16:31:13,895 INFO L226 Difference]: Without dead ends: 42 [2024-09-12 16:31:13,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 16:31:13,896 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:13,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 121 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-12 16:31:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-12 16:31:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-12 16:31:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-12 16:31:13,903 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-12 16:31:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:13,903 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-12 16:31:13,903 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-12 16:31:13,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-12 16:31:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-12 16:31:13,905 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:13,905 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:13,918 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 16:31:14,105 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:14,106 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:14,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-12 16:31:14,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:14,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731141945] [2024-09-12 16:31:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:14,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-12 16:31:14,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:14,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731141945] [2024-09-12 16:31:14,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731141945] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:14,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208451367] [2024-09-12 16:31:14,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:31:14,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:14,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:14,618 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 16:31:14,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 16:31:14,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 16:31:14,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:14,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 16:31:14,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-12 16:31:14,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 16:31:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208451367] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:18,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:18,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2024-09-12 16:31:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093403196] [2024-09-12 16:31:18,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:18,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 16:31:18,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 16:31:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:31:18,139 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-12 16:31:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:18,248 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-12 16:31:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:31:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 67 [2024-09-12 16:31:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:18,250 INFO L225 Difference]: With dead ends: 49 [2024-09-12 16:31:18,250 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 16:31:18,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 16:31:18,251 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:18,251 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 144 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 16:31:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 16:31:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-12 16:31:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-12 16:31:18,257 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-12 16:31:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:18,258 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-12 16:31:18,258 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-12 16:31:18,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-12 16:31:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-12 16:31:18,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:18,259 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:18,274 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 16:31:18,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 16:31:18,464 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:18,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-12 16:31:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:18,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345282158] [2024-09-12 16:31:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:18,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:18,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:19,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-12 16:31:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:19,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345282158] [2024-09-12 16:31:19,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345282158] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:19,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429691159] [2024-09-12 16:31:19,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:31:19,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:19,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:31:19,055 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 16:31:19,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:31:19,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:19,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 16:31:19,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-12 16:31:19,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-12 16:31:23,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429691159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:23,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:23,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2024-09-12 16:31:23,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514810004] [2024-09-12 16:31:23,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:23,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 16:31:23,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:23,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 16:31:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2024-09-12 16:31:23,811 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-12 16:31:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:23,932 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-12 16:31:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 16:31:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 73 [2024-09-12 16:31:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:23,933 INFO L225 Difference]: With dead ends: 52 [2024-09-12 16:31:23,933 INFO L226 Difference]: Without dead ends: 48 [2024-09-12 16:31:23,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 16:31:23,935 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:23,935 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 132 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-12 16:31:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-12 16:31:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-12 16:31:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-12 16:31:23,941 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-12 16:31:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:23,941 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-12 16:31:23,942 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-12 16:31:23,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-12 16:31:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-12 16:31:23,943 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:23,943 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:23,959 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 16:31:24,144 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 16:31:24,144 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:24,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-12 16:31:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:24,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228412919] [2024-09-12 16:31:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-12 16:31:24,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228412919] [2024-09-12 16:31:24,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228412919] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418868911] [2024-09-12 16:31:24,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:31:24,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:24,784 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:31:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 16:31:25,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 16:31:25,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:25,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 16:31:25,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-12 16:31:25,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 16:31:30,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418868911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:30,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:30,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2024-09-12 16:31:30,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76240682] [2024-09-12 16:31:30,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:30,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 16:31:30,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 16:31:30,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2024-09-12 16:31:30,679 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-12 16:31:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:30,835 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-12 16:31:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:31:30,836 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 79 [2024-09-12 16:31:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:30,836 INFO L225 Difference]: With dead ends: 55 [2024-09-12 16:31:30,836 INFO L226 Difference]: Without dead ends: 51 [2024-09-12 16:31:30,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=577, Invalid=1229, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 16:31:30,838 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:30,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 161 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-12 16:31:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-12 16:31:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-12 16:31:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-12 16:31:30,844 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-12 16:31:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:30,845 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-12 16:31:30,845 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-12 16:31:30,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-12 16:31:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-12 16:31:30,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:30,846 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:30,860 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 16:31:31,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:31,051 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:31,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-12 16:31:31,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:31,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479447888] [2024-09-12 16:31:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-12 16:31:31,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:31,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479447888] [2024-09-12 16:31:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479447888] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:31,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727664308] [2024-09-12 16:31:31,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 16:31:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:31,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:31,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:31:31,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 16:31:32,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-12 16:31:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:32,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 16:31:32,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-12 16:31:32,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 16:31:39,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727664308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:39,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:39,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2024-09-12 16:31:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871571138] [2024-09-12 16:31:39,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:39,328 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 16:31:39,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 16:31:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 16:31:39,330 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-12 16:31:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:39,483 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-12 16:31:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 16:31:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 85 [2024-09-12 16:31:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:39,484 INFO L225 Difference]: With dead ends: 58 [2024-09-12 16:31:39,484 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 16:31:39,485 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 168 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 16:31:39,486 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:39,486 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 16:31:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-12 16:31:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 16:31:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-12 16:31:39,499 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-12 16:31:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:39,500 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-12 16:31:39,500 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-12 16:31:39,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-12 16:31:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-12 16:31:39,501 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:39,501 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:39,521 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 16:31:39,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 16:31:39,702 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:39,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-12 16:31:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:39,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094799678] [2024-09-12 16:31:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:39,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:39,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:39,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-12 16:31:40,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:40,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094799678] [2024-09-12 16:31:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094799678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081087347] [2024-09-12 16:31:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 16:31:40,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:40,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:40,555 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:31:40,556 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 16:31:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:40,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 16:31:40,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-12 16:31:41,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:31:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-12 16:31:50,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081087347] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:31:50,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:31:50,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2024-09-12 16:31:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084053947] [2024-09-12 16:31:50,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:31:50,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 16:31:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:31:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 16:31:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 16:31:50,159 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-12 16:31:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:31:50,301 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-12 16:31:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 16:31:50,301 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 91 [2024-09-12 16:31:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:31:50,302 INFO L225 Difference]: With dead ends: 61 [2024-09-12 16:31:50,302 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 16:31:50,303 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 180 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=755, Invalid=1597, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 16:31:50,303 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:31:50,303 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 171 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:31:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 16:31:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-12 16:31:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-12 16:31:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-12 16:31:50,322 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-12 16:31:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:31:50,323 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-12 16:31:50,324 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-12 16:31:50,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-12 16:31:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-12 16:31:50,326 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:31:50,326 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:31:50,341 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 16:31:50,526 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 16:31:50,526 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:31:50,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:31:50,527 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-12 16:31:50,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:31:50,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751618141] [2024-09-12 16:31:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:31:50,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:31:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:50,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:31:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:50,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:31:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:50,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:50,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:50,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:50,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:31:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:31:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-12 16:31:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:31:51,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751618141] [2024-09-12 16:31:51,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751618141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:31:51,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005896365] [2024-09-12 16:31:51,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:31:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:31:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:31:51,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:31:51,411 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 16:31:51,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:31:51,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:31:51,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 16:31:51,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:31:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-12 16:31:52,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:32:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-12 16:32:03,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005896365] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:32:03,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:32:03,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-12 16:32:03,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711772220] [2024-09-12 16:32:03,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:32:03,073 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 16:32:03,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:32:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 16:32:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 16:32:03,075 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-12 16:32:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:32:03,241 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-12 16:32:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:32:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-12 16:32:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:32:03,242 INFO L225 Difference]: With dead ends: 64 [2024-09-12 16:32:03,242 INFO L226 Difference]: Without dead ends: 60 [2024-09-12 16:32:03,243 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 16:32:03,243 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:32:03,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 178 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:32:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-12 16:32:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-12 16:32:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-12 16:32:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-12 16:32:03,250 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-12 16:32:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:32:03,250 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-12 16:32:03,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-12 16:32:03,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:32:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-12 16:32:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-12 16:32:03,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:32:03,251 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:32:03,267 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-12 16:32:03,452 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 16:32:03,452 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:32:03,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:32:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-12 16:32:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:32:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577865717] [2024-09-12 16:32:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:32:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:32:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:03,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:32:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:03,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:32:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:03,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:03,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:03,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:03,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:03,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-12 16:32:04,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:32:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577865717] [2024-09-12 16:32:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577865717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:32:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33013603] [2024-09-12 16:32:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:32:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:32:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:32:04,431 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:32:04,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 16:32:05,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-12 16:32:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:32:05,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 16:32:05,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:32:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-12 16:32:05,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:32:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-12 16:32:18,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33013603] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:32:18,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:32:18,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2024-09-12 16:32:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8626896] [2024-09-12 16:32:18,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:32:18,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 16:32:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:32:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 16:32:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 16:32:18,952 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-12 16:32:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:32:19,160 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-12 16:32:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 16:32:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 103 [2024-09-12 16:32:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:32:19,161 INFO L225 Difference]: With dead ends: 67 [2024-09-12 16:32:19,161 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 16:32:19,162 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 204 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=957, Invalid=2013, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 16:32:19,162 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:32:19,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 211 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:32:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 16:32:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-12 16:32:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2024-09-12 16:32:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-12 16:32:19,170 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-12 16:32:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:32:19,170 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-12 16:32:19,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-12 16:32:19,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:32:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-12 16:32:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-12 16:32:19,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:32:19,171 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:32:19,189 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 16:32:19,372 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 16:32:19,372 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:32:19,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:32:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-12 16:32:19,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:32:19,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78381347] [2024-09-12 16:32:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:32:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:32:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:19,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:32:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:19,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:32:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:19,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:19,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:19,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:19,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-12 16:32:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:32:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78381347] [2024-09-12 16:32:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78381347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:32:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292271150] [2024-09-12 16:32:20,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:32:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:32:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:32:20,512 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:32:20,513 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 16:32:21,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:32:21,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:32:21,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 16:32:21,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:32:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-12 16:32:21,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:32:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-12 16:32:38,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292271150] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:32:38,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:32:38,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2024-09-12 16:32:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252379423] [2024-09-12 16:32:38,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:32:38,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 16:32:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:32:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 16:32:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 16:32:38,315 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-12 16:32:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:32:38,503 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-12 16:32:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 16:32:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 109 [2024-09-12 16:32:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:32:38,504 INFO L225 Difference]: With dead ends: 70 [2024-09-12 16:32:38,504 INFO L226 Difference]: Without dead ends: 66 [2024-09-12 16:32:38,505 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 216 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 16:32:38,506 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:32:38,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:32:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-12 16:32:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-12 16:32:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2024-09-12 16:32:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-12 16:32:38,512 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-12 16:32:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:32:38,512 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-12 16:32:38,513 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-12 16:32:38,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:32:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-12 16:32:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-12 16:32:38,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:32:38,514 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:32:38,535 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 16:32:38,718 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:32:38,719 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:32:38,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:32:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1440720433, now seen corresponding path program 17 times [2024-09-12 16:32:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:32:38,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815669981] [2024-09-12 16:32:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:32:38,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:32:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:38,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:32:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:38,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:32:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:38,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:32:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:32:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-12 16:32:39,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:32:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815669981] [2024-09-12 16:32:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815669981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:32:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814426127] [2024-09-12 16:32:39,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:32:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:32:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:32:39,984 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:32:39,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 16:32:40,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-12 16:32:40,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:32:40,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 16:32:41,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:32:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-12 16:32:41,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-12 16:33:01,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814426127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:33:01,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:33:01,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2024-09-12 16:33:01,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720461391] [2024-09-12 16:33:01,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:33:01,483 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 16:33:01,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:01,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 16:33:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 16:33:01,484 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-12 16:33:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:01,725 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-12 16:33:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 16:33:01,726 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 115 [2024-09-12 16:33:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:01,727 INFO L225 Difference]: With dead ends: 73 [2024-09-12 16:33:01,727 INFO L226 Difference]: Without dead ends: 69 [2024-09-12 16:33:01,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 228 SyntacticMatches, 18 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1183, Invalid=2477, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 16:33:01,729 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:01,729 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 192 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:33:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-12 16:33:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-12 16:33:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2024-09-12 16:33:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-12 16:33:01,740 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-12 16:33:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:01,740 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-12 16:33:01,741 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-12 16:33:01,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-12 16:33:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-12 16:33:01,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:01,742 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:01,768 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-12 16:33:01,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 16:33:01,943 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:01,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1110583619, now seen corresponding path program 18 times [2024-09-12 16:33:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:01,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713380995] [2024-09-12 16:33:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:33:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:02,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-09-12 16:33:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713380995] [2024-09-12 16:33:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713380995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266580659] [2024-09-12 16:33:03,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 16:33:03,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:03,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:03,468 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:03,469 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 16:33:04,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-12 16:33:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:33:04,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 16:33:04,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-12 16:33:04,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-12 16:33:29,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266580659] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:33:29,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:33:29,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2024-09-12 16:33:29,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840331836] [2024-09-12 16:33:29,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:33:29,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 16:33:29,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:29,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 16:33:29,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 16:33:29,260 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-12 16:33:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:29,461 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-12 16:33:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 16:33:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 121 [2024-09-12 16:33:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:29,462 INFO L225 Difference]: With dead ends: 76 [2024-09-12 16:33:29,462 INFO L226 Difference]: Without dead ends: 72 [2024-09-12 16:33:29,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 240 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2727, Unknown=0, NotChecked=0, Total=4032 [2024-09-12 16:33:29,464 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:29,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 210 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:33:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-12 16:33:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-12 16:33:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2024-09-12 16:33:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-12 16:33:29,470 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-12 16:33:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:29,471 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-12 16:33:29,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-12 16:33:29,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-12 16:33:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-12 16:33:29,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:29,472 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:29,497 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 16:33:29,673 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:29,673 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:29,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1808618865, now seen corresponding path program 19 times [2024-09-12 16:33:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578783160] [2024-09-12 16:33:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:29,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:29,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:33:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:29,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-09-12 16:33:30,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:30,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578783160] [2024-09-12 16:33:30,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578783160] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421899040] [2024-09-12 16:33:30,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 16:33:30,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:30,925 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:30,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 16:33:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:32,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-12 16:33:32,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-12 16:33:32,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-12 16:34:01,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421899040] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:34:01,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:34:01,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 48 [2024-09-12 16:34:01,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493542111] [2024-09-12 16:34:01,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:01,592 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 16:34:01,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 16:34:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 16:34:01,594 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-12 16:34:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:01,822 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-12 16:34:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 16:34:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) Word has length 127 [2024-09-12 16:34:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:01,824 INFO L225 Difference]: With dead ends: 79 [2024-09-12 16:34:01,824 INFO L226 Difference]: Without dead ends: 75 [2024-09-12 16:34:01,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 252 SyntacticMatches, 20 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 16:34:01,826 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:01,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 234 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-12 16:34:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-12 16:34:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2024-09-12 16:34:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-12 16:34:01,831 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-12 16:34:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:01,832 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-12 16:34:01,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-12 16:34:01,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-12 16:34:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-12 16:34:01,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:01,833 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:01,855 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-12 16:34:02,034 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:02,034 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:02,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash 145386749, now seen corresponding path program 20 times [2024-09-12 16:34:02,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:02,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37445865] [2024-09-12 16:34:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:34:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2024-09-12 16:34:03,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:03,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37445865] [2024-09-12 16:34:03,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37445865] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:03,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141824354] [2024-09-12 16:34:03,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:34:03,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:03,323 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:03,324 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 16:34:05,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:34:05,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:05,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-12 16:34:05,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-12 16:34:05,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-12 16:34:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141824354] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:34:39,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:34:39,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 45] total 50 [2024-09-12 16:34:39,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126937790] [2024-09-12 16:34:39,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:39,856 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 16:34:39,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:39,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 16:34:39,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1803, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 16:34:39,858 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-12 16:34:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:40,105 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-09-12 16:34:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 16:34:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) Word has length 133 [2024-09-12 16:34:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:40,106 INFO L225 Difference]: With dead ends: 82 [2024-09-12 16:34:40,106 INFO L226 Difference]: Without dead ends: 78 [2024-09-12 16:34:40,108 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 264 SyntacticMatches, 21 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1567, Invalid=3263, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 16:34:40,108 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:40,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 243 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-12 16:34:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-12 16:34:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2024-09-12 16:34:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-09-12 16:34:40,114 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-09-12 16:34:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:40,115 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-09-12 16:34:40,115 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-12 16:34:40,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-09-12 16:34:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-12 16:34:40,117 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:40,117 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:40,140 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 16:34:40,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-12 16:34:40,317 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:40,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1314272433, now seen corresponding path program 21 times [2024-09-12 16:34:40,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:40,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838043374] [2024-09-12 16:34:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:40,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:40,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:40,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:34:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:40,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:40,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:40,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:40,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2024-09-12 16:34:41,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:41,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838043374] [2024-09-12 16:34:41,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838043374] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:41,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940207967] [2024-09-12 16:34:41,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:34:41,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:41,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:41,838 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:41,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 16:34:43,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-12 16:34:43,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:43,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-12 16:34:43,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-12 16:34:44,044 INFO L327 TraceCheckSpWp]: Computing backward predicates...