./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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/MultCommutative-2.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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:47:00,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:47:00,693 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:47:00,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:47:00,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:47:00,729 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:47:00,731 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:47:00,732 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:47:00,732 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:47:00,733 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:47:00,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:47:00,733 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:47:00,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:47:00,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:47:00,736 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:47:00,736 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:47:00,737 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:47:00,737 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:47:00,737 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:47:00,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:47:00,738 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:47:00,741 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:47:00,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:47:00,742 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:47:00,742 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:47:00,742 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:47:00,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:47:00,743 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:47:00,743 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:47:00,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:47:00,743 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:47:00,744 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:47:00,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:47:00,744 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:47:00,744 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:47:00,744 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:47:00,745 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:47:00,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:47:00,745 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:47:00,746 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:47:00,746 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:47:00,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:47:00,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:47:01,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:47:01,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:47:01,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:47:01,106 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:47:01,106 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:47:01,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/MultCommutative-2.c [2024-09-20 19:47:02,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:47:02,658 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:47:02,658 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/MultCommutative-2.c [2024-09-20 19:47:02,665 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d4e0fbb59/f5dd25e95aaa4f56aac5b083e7044062/FLAGd174dd509 [2024-09-20 19:47:03,053 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d4e0fbb59/f5dd25e95aaa4f56aac5b083e7044062 [2024-09-20 19:47:03,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:47:03,056 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:47:03,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:47:03,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:47:03,061 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:47:03,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,062 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66043c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03, skipping insertion in model container [2024-09-20 19:47:03,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,078 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:47:03,231 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2024-09-20 19:47:03,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:47:03,244 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:47:03,255 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2024-09-20 19:47:03,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:47:03,271 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:47:03,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03 WrapperNode [2024-09-20 19:47:03,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:47:03,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:47:03,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:47:03,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:47:03,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,292 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:47:03,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:47:03,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:47:03,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:47:03,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:47:03,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,309 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,326 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]. [2024-09-20 19:47:03,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,330 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,332 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:47:03,338 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:47:03,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:47:03,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:47:03,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (1/1) ... [2024-09-20 19:47:03,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:47:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:03,379 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) [2024-09-20 19:47:03,382 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 [2024-09-20 19:47:03,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:47:03,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:47:03,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:47:03,433 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2024-09-20 19:47:03,433 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2024-09-20 19:47:03,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:47:03,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:47:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:47:03,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:47:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:47:03,495 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:47:03,497 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:47:03,704 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-20 19:47:03,704 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:47:03,748 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:47:03,748 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 19:47:03,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:47:03 BoogieIcfgContainer [2024-09-20 19:47:03,749 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:47:03,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:47:03,751 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:47:03,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:47:03,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:47:03" (1/3) ... [2024-09-20 19:47:03,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144daa5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:47:03, skipping insertion in model container [2024-09-20 19:47:03,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:47:03" (2/3) ... [2024-09-20 19:47:03,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144daa5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:47:03, skipping insertion in model container [2024-09-20 19:47:03,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:47:03" (3/3) ... [2024-09-20 19:47:03,778 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2024-09-20 19:47:03,795 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:47:03,796 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:47:03,842 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:47:03,847 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;@58f2b0ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:47:03,847 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:47:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:47:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 19:47:03,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:03,858 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:03,858 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:03,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1859846447, now seen corresponding path program 1 times [2024-09-20 19:47:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:03,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296412585] [2024-09-20 19:47:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:03,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 19:47:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 19:47:04,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:04,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296412585] [2024-09-20 19:47:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296412585] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:47:04,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:47:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 19:47:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254255826] [2024-09-20 19:47:04,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:47:04,328 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:47:04,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:47:04,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:47:04,353 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:47:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:04,444 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2024-09-20 19:47:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:47:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-20 19:47:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:04,455 INFO L225 Difference]: With dead ends: 41 [2024-09-20 19:47:04,455 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 19:47:04,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:47:04,461 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:04,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 164 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:47:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 19:47:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-09-20 19:47:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 19:47:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2024-09-20 19:47:04,499 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 23 [2024-09-20 19:47:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:04,500 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2024-09-20 19:47:04,500 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:47:04,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2024-09-20 19:47:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 19:47:04,503 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:04,503 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:04,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:47:04,504 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:04,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1394897481, now seen corresponding path program 1 times [2024-09-20 19:47:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:04,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837302868] [2024-09-20 19:47:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 19:47:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:47:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:47:04,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:04,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837302868] [2024-09-20 19:47:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837302868] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478364561] [2024-09-20 19:47:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:04,804 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) [2024-09-20 19:47:04,806 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:47:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:04,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 19:47:04,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:47:04,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:47:05,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478364561] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:05,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:05,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2024-09-20 19:47:05,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826419814] [2024-09-20 19:47:05,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:05,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 19:47:05,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 19:47:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:47:05,078 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 19:47:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:05,316 INFO L93 Difference]: Finished difference Result 55 states and 86 transitions. [2024-09-20 19:47:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:47:05,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2024-09-20 19:47:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:05,318 INFO L225 Difference]: With dead ends: 55 [2024-09-20 19:47:05,325 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:47:05,326 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:47:05,327 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:05,327 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 163 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:47:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:47:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-09-20 19:47:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 19:47:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-20 19:47:05,342 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 29 [2024-09-20 19:47:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:05,342 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-20 19:47:05,343 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 19:47:05,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-20 19:47:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 19:47:05,344 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:05,345 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:05,360 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:47:05,547 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 [2024-09-20 19:47:05,548 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:05,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1508818693, now seen corresponding path program 1 times [2024-09-20 19:47:05,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:05,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995002490] [2024-09-20 19:47:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:05,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:47:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 19:47:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995002490] [2024-09-20 19:47:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995002490] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:47:05,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:47:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:47:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28081778] [2024-09-20 19:47:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:47:05,636 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:47:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:47:05,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:47:05,637 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:47:05,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:05,692 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-09-20 19:47:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:47:05,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-09-20 19:47:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:05,694 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:47:05,694 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:47:05,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:47:05,696 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:05,697 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:47:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:47:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 19:47:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 19:47:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-09-20 19:47:05,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 30 [2024-09-20 19:47:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:05,706 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-09-20 19:47:05,706 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:47:05,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-09-20 19:47:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:47:05,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:05,708 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:05,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 19:47:05,709 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:05,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1681162323, now seen corresponding path program 1 times [2024-09-20 19:47:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141149284] [2024-09-20 19:47:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:47:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:47:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:47:05,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:05,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141149284] [2024-09-20 19:47:05,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141149284] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:05,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238142425] [2024-09-20 19:47:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:05,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:05,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:05,897 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) [2024-09-20 19:47:05,898 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:47:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:05,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 19:47:05,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-20 19:47:06,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-20 19:47:06,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238142425] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:06,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:06,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-09-20 19:47:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622998062] [2024-09-20 19:47:06,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:06,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 19:47:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 19:47:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:47:06,230 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 19:47:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:06,313 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2024-09-20 19:47:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:47:06,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 50 [2024-09-20 19:47:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:06,314 INFO L225 Difference]: With dead ends: 49 [2024-09-20 19:47:06,314 INFO L226 Difference]: Without dead ends: 23 [2024-09-20 19:47:06,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:47:06,317 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:06,318 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 111 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:47:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-20 19:47:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-20 19:47:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 19:47:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-20 19:47:06,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 50 [2024-09-20 19:47:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:06,326 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-20 19:47:06,326 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 19:47:06,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-20 19:47:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 19:47:06,327 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:06,328 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:06,343 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:47:06,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:06,528 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:06,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1570908093, now seen corresponding path program 2 times [2024-09-20 19:47:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:06,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653239569] [2024-09-20 19:47:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:06,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:06,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:06,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:06,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:06,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:47:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:07,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 19:47:07,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:07,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653239569] [2024-09-20 19:47:07,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653239569] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:07,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128416438] [2024-09-20 19:47:07,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:47:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:07,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:07,062 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) [2024-09-20 19:47:07,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:47:07,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:47:07,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:07,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 19:47:07,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:47:07,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:47:08,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128416438] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:08,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:08,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2024-09-20 19:47:08,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732887710] [2024-09-20 19:47:08,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:08,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 19:47:08,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 19:47:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 19:47:08,367 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 40 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 19:47:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:08,647 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-09-20 19:47:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:47:08,648 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) Word has length 37 [2024-09-20 19:47:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:08,649 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:47:08,649 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:47:08,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1767, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 19:47:08,651 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:08,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 184 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:47:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:47:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-09-20 19:47:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-20 19:47:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-09-20 19:47:08,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 37 [2024-09-20 19:47:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:08,671 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-09-20 19:47:08,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 19:47:08,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-09-20 19:47:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 19:47:08,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:08,672 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:08,691 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:47:08,878 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:08,879 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:08,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1355077807, now seen corresponding path program 3 times [2024-09-20 19:47:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:08,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901810097] [2024-09-20 19:47:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:09,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:09,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:09,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:09,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:47:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:09,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:09,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 19:47:09,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:09,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901810097] [2024-09-20 19:47:09,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901810097] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:09,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182798403] [2024-09-20 19:47:09,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:47:09,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:09,353 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) [2024-09-20 19:47:09,354 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:47:09,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 19:47:09,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:09,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-20 19:47:09,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 19:47:09,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:47:10,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182798403] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:10,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:10,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 18] total 39 [2024-09-20 19:47:10,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151232643] [2024-09-20 19:47:10,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:10,430 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 19:47:10,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:10,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 19:47:10,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 19:47:10,432 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 39 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 25 states have internal predecessors, (55), 8 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-20 19:47:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:11,310 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2024-09-20 19:47:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 19:47:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 25 states have internal predecessors, (55), 8 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) Word has length 44 [2024-09-20 19:47:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:11,315 INFO L225 Difference]: With dead ends: 48 [2024-09-20 19:47:11,316 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 19:47:11,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=326, Invalid=2866, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 19:47:11,318 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:11,320 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 283 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:47:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 19:47:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2024-09-20 19:47:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-20 19:47:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-09-20 19:47:11,335 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 44 [2024-09-20 19:47:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:11,338 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-09-20 19:47:11,338 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 25 states have internal predecessors, (55), 8 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-20 19:47:11,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-09-20 19:47:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 19:47:11,339 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:11,339 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:11,358 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:47:11,543 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:11,544 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:11,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1628773349, now seen corresponding path program 4 times [2024-09-20 19:47:11,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419830230] [2024-09-20 19:47:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:11,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:11,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:11,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:11,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:11,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:11,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:47:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:11,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 19:47:12,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419830230] [2024-09-20 19:47:12,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419830230] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617776272] [2024-09-20 19:47:12,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:47:12,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:12,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:12,009 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) [2024-09-20 19:47:12,011 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:47:12,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:47:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:12,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 19:47:12,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:47:12,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 19:47:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617776272] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:13,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:13,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 20] total 46 [2024-09-20 19:47:13,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305000985] [2024-09-20 19:47:13,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:13,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-20 19:47:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:13,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-20 19:47:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 19:47:13,286 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 46 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 31 states have internal predecessors, (65), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-20 19:47:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:14,066 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2024-09-20 19:47:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 19:47:14,067 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 31 states have internal predecessors, (65), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 9 states have call successors, (16) Word has length 44 [2024-09-20 19:47:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:14,068 INFO L225 Difference]: With dead ends: 52 [2024-09-20 19:47:14,068 INFO L226 Difference]: Without dead ends: 44 [2024-09-20 19:47:14,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=421, Invalid=3485, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 19:47:14,070 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:14,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 267 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:47:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-20 19:47:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2024-09-20 19:47:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-20 19:47:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-09-20 19:47:14,083 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 44 [2024-09-20 19:47:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:14,084 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-09-20 19:47:14,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 31 states have internal predecessors, (65), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-20 19:47:14,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-09-20 19:47:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 19:47:14,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:14,086 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:14,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:47:14,289 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:47:14,290 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:14,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1170996589, now seen corresponding path program 5 times [2024-09-20 19:47:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:14,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426408025] [2024-09-20 19:47:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:14,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:47:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 19:47:14,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426408025] [2024-09-20 19:47:14,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426408025] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:14,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904938489] [2024-09-20 19:47:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:47:14,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:14,857 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) [2024-09-20 19:47:14,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:47:14,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 19:47:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:14,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 19:47:14,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:47:15,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:47:16,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904938489] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:16,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:16,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 23] total 54 [2024-09-20 19:47:16,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665426770] [2024-09-20 19:47:16,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:16,616 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-20 19:47:16,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-20 19:47:16,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2670, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 19:47:16,618 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 54 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 36 states have internal predecessors, (75), 10 states have call successors, (12), 1 states have call predecessors, (12), 17 states have return successors, (19), 19 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-20 19:47:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:17,689 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2024-09-20 19:47:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 19:47:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 36 states have internal predecessors, (75), 10 states have call successors, (12), 1 states have call predecessors, (12), 17 states have return successors, (19), 19 states have call predecessors, (19), 10 states have call successors, (19) Word has length 51 [2024-09-20 19:47:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:17,693 INFO L225 Difference]: With dead ends: 71 [2024-09-20 19:47:17,693 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 19:47:17,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=523, Invalid=5027, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 19:47:17,695 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:17,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 372 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:47:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 19:47:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2024-09-20 19:47:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (27), 13 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-20 19:47:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2024-09-20 19:47:17,721 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 51 [2024-09-20 19:47:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:17,722 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2024-09-20 19:47:17,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 36 states have internal predecessors, (75), 10 states have call successors, (12), 1 states have call predecessors, (12), 17 states have return successors, (19), 19 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-20 19:47:17,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2024-09-20 19:47:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-20 19:47:17,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:17,728 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:17,744 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:47:17,929 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:17,929 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:17,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1806313405, now seen corresponding path program 6 times [2024-09-20 19:47:17,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:17,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913284150] [2024-09-20 19:47:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:17,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 19:47:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-09-20 19:47:18,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:18,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913284150] [2024-09-20 19:47:18,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913284150] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:18,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692576028] [2024-09-20 19:47:18,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:47:18,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:18,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:18,962 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) [2024-09-20 19:47:18,963 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:47:19,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-20 19:47:19,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:19,043 WARN L260 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-20 19:47:19,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 19:47:19,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 29 proven. 153 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:47:21,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692576028] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:21,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:21,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 30] total 61 [2024-09-20 19:47:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207166418] [2024-09-20 19:47:21,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:21,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-20 19:47:21,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-20 19:47:21,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3432, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 19:47:21,140 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 61 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (15), 1 states have call predecessors, (15), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 19:47:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:22,356 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2024-09-20 19:47:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 19:47:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (15), 1 states have call predecessors, (15), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 72 [2024-09-20 19:47:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:22,358 INFO L225 Difference]: With dead ends: 81 [2024-09-20 19:47:22,358 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 19:47:22,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=638, Invalid=6502, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 19:47:22,361 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:22,361 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 504 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:47:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 19:47:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2024-09-20 19:47:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (26), 13 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-20 19:47:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2024-09-20 19:47:22,376 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 72 [2024-09-20 19:47:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:22,377 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2024-09-20 19:47:22,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 38 states have internal predecessors, (82), 13 states have call successors, (15), 1 states have call predecessors, (15), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 19:47:22,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2024-09-20 19:47:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 19:47:22,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:22,379 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:22,391 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 19:47:22,579 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:22,580 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:22,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 240502641, now seen corresponding path program 7 times [2024-09-20 19:47:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668510051] [2024-09-20 19:47:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:22,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:22,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:22,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 19:47:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-09-20 19:47:23,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668510051] [2024-09-20 19:47:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668510051] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951944352] [2024-09-20 19:47:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:47:23,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:23,939 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) [2024-09-20 19:47:23,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:47:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:24,016 WARN L260 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-20 19:47:24,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 5 proven. 163 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-09-20 19:47:24,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 38 proven. 250 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-20 19:47:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951944352] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:26,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 36] total 72 [2024-09-20 19:47:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136080886] [2024-09-20 19:47:26,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:26,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-20 19:47:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-20 19:47:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=4838, Unknown=0, NotChecked=0, Total=5112 [2024-09-20 19:47:26,742 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 72 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 44 states have internal predecessors, (97), 15 states have call successors, (17), 1 states have call predecessors, (17), 22 states have return successors, (30), 29 states have call predecessors, (30), 15 states have call successors, (30) [2024-09-20 19:47:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:28,576 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2024-09-20 19:47:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 19:47:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 44 states have internal predecessors, (97), 15 states have call successors, (17), 1 states have call predecessors, (17), 22 states have return successors, (30), 29 states have call predecessors, (30), 15 states have call successors, (30) Word has length 86 [2024-09-20 19:47:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:28,578 INFO L225 Difference]: With dead ends: 87 [2024-09-20 19:47:28,578 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 19:47:28,581 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=813, Invalid=9287, Unknown=0, NotChecked=0, Total=10100 [2024-09-20 19:47:28,581 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:28,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 779 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 19:47:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 19:47:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2024-09-20 19:47:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 10 states have call successors, (10), 6 states have call predecessors, (10), 11 states have return successors, (29), 14 states have call predecessors, (29), 9 states have call successors, (29) [2024-09-20 19:47:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2024-09-20 19:47:28,603 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 86 [2024-09-20 19:47:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:28,604 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2024-09-20 19:47:28,604 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 44 states have internal predecessors, (97), 15 states have call successors, (17), 1 states have call predecessors, (17), 22 states have return successors, (30), 29 states have call predecessors, (30), 15 states have call successors, (30) [2024-09-20 19:47:28,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2024-09-20 19:47:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:47:28,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:28,605 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:28,618 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 19:47:28,806 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:28,807 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:28,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:28,807 INFO L85 PathProgramCache]: Analyzing trace with hash -879054875, now seen corresponding path program 8 times [2024-09-20 19:47:28,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:28,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92884382] [2024-09-20 19:47:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:28,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:47:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:29,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-09-20 19:47:30,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:30,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92884382] [2024-09-20 19:47:30,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92884382] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:30,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152431842] [2024-09-20 19:47:30,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:47:30,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:30,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:30,010 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) [2024-09-20 19:47:30,012 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:47:30,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:47:30,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:30,088 WARN L260 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-20 19:47:30,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-09-20 19:47:30,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-20 19:47:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152431842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:32,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:32,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 68 [2024-09-20 19:47:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784495915] [2024-09-20 19:47:32,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:32,692 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 19:47:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 19:47:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4308, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 19:47:32,695 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (16), 1 states have call predecessors, (16), 20 states have return successors, (29), 28 states have call predecessors, (29), 14 states have call successors, (29) [2024-09-20 19:47:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:34,139 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2024-09-20 19:47:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-20 19:47:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (16), 1 states have call predecessors, (16), 20 states have return successors, (29), 28 states have call predecessors, (29), 14 states have call successors, (29) Word has length 79 [2024-09-20 19:47:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:34,140 INFO L225 Difference]: With dead ends: 84 [2024-09-20 19:47:34,140 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 19:47:34,142 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=655, Invalid=7901, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 19:47:34,143 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:34,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 725 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 19:47:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 19:47:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2024-09-20 19:47:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 10 states have call successors, (10), 6 states have call predecessors, (10), 12 states have return successors, (32), 15 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-20 19:47:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2024-09-20 19:47:34,164 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 79 [2024-09-20 19:47:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:34,164 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2024-09-20 19:47:34,164 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (16), 1 states have call predecessors, (16), 20 states have return successors, (29), 28 states have call predecessors, (29), 14 states have call successors, (29) [2024-09-20 19:47:34,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2024-09-20 19:47:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-20 19:47:34,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:34,166 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:34,182 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 19:47:34,370 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 19:47:34,370 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:34,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1998053917, now seen corresponding path program 9 times [2024-09-20 19:47:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:34,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256521142] [2024-09-20 19:47:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:34,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:34,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:34,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:34,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:34,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:34,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:47:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-09-20 19:47:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:35,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256521142] [2024-09-20 19:47:35,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256521142] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:35,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718351674] [2024-09-20 19:47:35,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:47:35,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:35,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:35,850 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) [2024-09-20 19:47:35,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:47:35,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-20 19:47:35,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:35,931 WARN L260 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-20 19:47:35,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2024-09-20 19:47:36,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-20 19:47:38,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718351674] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:38,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:38,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 36] total 74 [2024-09-20 19:47:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066704384] [2024-09-20 19:47:38,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:38,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-20 19:47:38,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-20 19:47:38,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5132, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 19:47:38,622 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (17), 1 states have call predecessors, (17), 22 states have return successors, (32), 31 states have call predecessors, (32), 15 states have call successors, (32) [2024-09-20 19:47:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:39,943 INFO L93 Difference]: Finished difference Result 87 states and 122 transitions. [2024-09-20 19:47:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-20 19:47:39,943 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (17), 1 states have call predecessors, (17), 22 states have return successors, (32), 31 states have call predecessors, (32), 15 states have call successors, (32) Word has length 86 [2024-09-20 19:47:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:39,944 INFO L225 Difference]: With dead ends: 87 [2024-09-20 19:47:39,945 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 19:47:39,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=736, Invalid=9364, Unknown=0, NotChecked=0, Total=10100 [2024-09-20 19:47:39,946 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:39,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 582 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:47:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 19:47:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2024-09-20 19:47:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 10 states have call successors, (10), 6 states have call predecessors, (10), 13 states have return successors, (35), 16 states have call predecessors, (35), 9 states have call successors, (35) [2024-09-20 19:47:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2024-09-20 19:47:39,968 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 86 [2024-09-20 19:47:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:39,969 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2024-09-20 19:47:39,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (17), 1 states have call predecessors, (17), 22 states have return successors, (32), 31 states have call predecessors, (32), 15 states have call successors, (32) [2024-09-20 19:47:39,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2024-09-20 19:47:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:47:39,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:39,970 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:39,987 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 19:47:40,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 19:47:40,171 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:40,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1103674431, now seen corresponding path program 10 times [2024-09-20 19:47:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:40,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991460691] [2024-09-20 19:47:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 19:47:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:40,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:41,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:41,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-09-20 19:47:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991460691] [2024-09-20 19:47:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991460691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:41,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21435620] [2024-09-20 19:47:41,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:47:41,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:41,154 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) [2024-09-20 19:47:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:47:41,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:47:41,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:41,229 WARN L260 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-20 19:47:41,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 3 proven. 136 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-09-20 19:47:41,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-20 19:47:43,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21435620] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:43,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:43,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 33] total 69 [2024-09-20 19:47:43,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778718964] [2024-09-20 19:47:43,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:43,433 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 19:47:43,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 19:47:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4429, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 19:47:43,434 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand has 69 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 43 states have internal predecessors, (92), 14 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-20 19:47:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:44,744 INFO L93 Difference]: Finished difference Result 91 states and 127 transitions. [2024-09-20 19:47:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 19:47:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 43 states have internal predecessors, (92), 14 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) Word has length 79 [2024-09-20 19:47:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:44,746 INFO L225 Difference]: With dead ends: 91 [2024-09-20 19:47:44,746 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 19:47:44,753 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=757, Invalid=8173, Unknown=0, NotChecked=0, Total=8930 [2024-09-20 19:47:44,754 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:44,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 596 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:47:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 19:47:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2024-09-20 19:47:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 10 states have call successors, (10), 6 states have call predecessors, (10), 13 states have return successors, (34), 16 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-20 19:47:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2024-09-20 19:47:44,776 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 79 [2024-09-20 19:47:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:44,776 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2024-09-20 19:47:44,776 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 43 states have internal predecessors, (92), 14 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-20 19:47:44,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2024-09-20 19:47:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-20 19:47:44,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:44,777 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:44,794 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 19:47:44,978 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:44,978 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:44,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1404959985, now seen corresponding path program 11 times [2024-09-20 19:47:44,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:44,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403003552] [2024-09-20 19:47:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:47:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:45,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:46,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:46,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:46,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:46,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:46,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-20 19:47:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403003552] [2024-09-20 19:47:46,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403003552] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:46,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059574160] [2024-09-20 19:47:46,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:47:46,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:46,472 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) [2024-09-20 19:47:46,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 19:47:46,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-20 19:47:46,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:46,556 WARN L260 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-09-20 19:47:46,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-20 19:47:47,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 19:47:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059574160] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:49,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:49,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 39] total 80 [2024-09-20 19:47:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672768767] [2024-09-20 19:47:49,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:49,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-20 19:47:49,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-20 19:47:49,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2024-09-20 19:47:49,718 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (18), 1 states have call predecessors, (18), 24 states have return successors, (35), 34 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-20 19:47:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:51,468 INFO L93 Difference]: Finished difference Result 88 states and 124 transitions. [2024-09-20 19:47:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 19:47:51,468 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (18), 1 states have call predecessors, (18), 24 states have return successors, (35), 34 states have call predecessors, (35), 16 states have call successors, (35) Word has length 93 [2024-09-20 19:47:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:51,469 INFO L225 Difference]: With dead ends: 88 [2024-09-20 19:47:51,469 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 19:47:51,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=817, Invalid=10739, Unknown=0, NotChecked=0, Total=11556 [2024-09-20 19:47:51,471 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:51,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 813 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 19:47:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 19:47:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2024-09-20 19:47:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 14 states have return successors, (37), 17 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-20 19:47:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2024-09-20 19:47:51,491 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 93 [2024-09-20 19:47:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:51,492 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2024-09-20 19:47:51,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (18), 1 states have call predecessors, (18), 24 states have return successors, (35), 34 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-20 19:47:51,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2024-09-20 19:47:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-09-20 19:47:51,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:51,494 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:51,512 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 19:47:51,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 19:47:51,694 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:51,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash -307076237, now seen corresponding path program 12 times [2024-09-20 19:47:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800738805] [2024-09-20 19:47:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:51,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:51,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:51,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:52,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:52,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:47:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:52,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:52,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:52,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:52,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:52,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:53,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:53,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:53,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:53,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2024-09-20 19:47:53,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:47:53,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800738805] [2024-09-20 19:47:53,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800738805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:47:53,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615042281] [2024-09-20 19:47:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:47:53,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:47:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:47:53,364 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) [2024-09-20 19:47:53,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 19:47:53,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-20 19:47:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:47:53,457 WARN L260 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-20 19:47:53,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:47:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 19 proven. 229 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-09-20 19:47:54,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:47:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 39 proven. 380 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-09-20 19:47:57,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615042281] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:47:57,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:47:57,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 42] total 86 [2024-09-20 19:47:57,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991163580] [2024-09-20 19:47:57,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:47:57,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-20 19:47:57,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:47:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-20 19:47:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6996, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 19:47:57,084 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 86 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 50 states have internal predecessors, (118), 17 states have call successors, (19), 1 states have call predecessors, (19), 26 states have return successors, (38), 37 states have call predecessors, (38), 17 states have call successors, (38) [2024-09-20 19:47:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:47:58,984 INFO L93 Difference]: Finished difference Result 91 states and 129 transitions. [2024-09-20 19:47:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 19:47:58,984 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 50 states have internal predecessors, (118), 17 states have call successors, (19), 1 states have call predecessors, (19), 26 states have return successors, (38), 37 states have call predecessors, (38), 17 states have call successors, (38) Word has length 100 [2024-09-20 19:47:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:47:58,985 INFO L225 Difference]: With dead ends: 91 [2024-09-20 19:47:58,985 INFO L226 Difference]: Without dead ends: 84 [2024-09-20 19:47:58,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=906, Invalid=12434, Unknown=0, NotChecked=0, Total=13340 [2024-09-20 19:47:58,987 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 146 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:47:58,987 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 837 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 19:47:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-20 19:47:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2024-09-20 19:47:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 10 states have call successors, (10), 6 states have call predecessors, (10), 15 states have return successors, (40), 18 states have call predecessors, (40), 9 states have call successors, (40) [2024-09-20 19:47:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2024-09-20 19:47:59,012 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 100 [2024-09-20 19:47:59,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:47:59,013 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2024-09-20 19:47:59,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 50 states have internal predecessors, (118), 17 states have call successors, (19), 1 states have call predecessors, (19), 26 states have return successors, (38), 37 states have call predecessors, (38), 17 states have call successors, (38) [2024-09-20 19:47:59,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2024-09-20 19:47:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-09-20 19:47:59,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:47:59,014 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:47:59,027 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 19:47:59,214 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 19:47:59,215 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:47:59,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:47:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 179440229, now seen corresponding path program 13 times [2024-09-20 19:47:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:47:59,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471060151] [2024-09-20 19:47:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:47:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:47:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:59,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:47:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:59,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:47:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:59,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:59,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:47:59,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:47:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:00,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:00,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:00,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:00,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 19:48:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:00,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:00,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:00,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-20 19:48:01,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:48:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471060151] [2024-09-20 19:48:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471060151] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:48:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039209196] [2024-09-20 19:48:01,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:48:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:48:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:48:01,881 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) [2024-09-20 19:48:01,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 19:48:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:01,974 WARN L260 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-09-20 19:48:01,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:48:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 10 proven. 460 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2024-09-20 19:48:03,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:48:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 65 proven. 783 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-20 19:48:08,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039209196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:48:08,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:48:08,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 30, 57] total 112 [2024-09-20 19:48:08,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910472952] [2024-09-20 19:48:08,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:48:08,126 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-09-20 19:48:08,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:48:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-09-20 19:48:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=12000, Unknown=0, NotChecked=0, Total=12432 [2024-09-20 19:48:08,128 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 112 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 65 states have internal predecessors, (151), 22 states have call successors, (24), 1 states have call predecessors, (24), 36 states have return successors, (49), 48 states have call predecessors, (49), 22 states have call successors, (49) [2024-09-20 19:48:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:48:11,641 INFO L93 Difference]: Finished difference Result 103 states and 152 transitions. [2024-09-20 19:48:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-20 19:48:11,642 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 65 states have internal predecessors, (151), 22 states have call successors, (24), 1 states have call predecessors, (24), 36 states have return successors, (49), 48 states have call predecessors, (49), 22 states have call successors, (49) Word has length 135 [2024-09-20 19:48:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:48:11,644 INFO L225 Difference]: With dead ends: 103 [2024-09-20 19:48:11,644 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 19:48:11,645 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1564, Invalid=21692, Unknown=0, NotChecked=0, Total=23256 [2024-09-20 19:48:11,646 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 146 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 4967 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 5133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 4967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:48:11,646 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1322 Invalid, 5133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 4967 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-20 19:48:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 19:48:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2024-09-20 19:48:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 10 states have call successors, (10), 6 states have call predecessors, (10), 16 states have return successors, (43), 19 states have call predecessors, (43), 9 states have call successors, (43) [2024-09-20 19:48:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 108 transitions. [2024-09-20 19:48:11,669 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 108 transitions. Word has length 135 [2024-09-20 19:48:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:48:11,670 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 108 transitions. [2024-09-20 19:48:11,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 65 states have internal predecessors, (151), 22 states have call successors, (24), 1 states have call predecessors, (24), 36 states have return successors, (49), 48 states have call predecessors, (49), 22 states have call successors, (49) [2024-09-20 19:48:11,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2024-09-20 19:48:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-20 19:48:11,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:48:11,672 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:48:11,686 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 19:48:11,872 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 19:48:11,873 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:48:11,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:11,873 INFO L85 PathProgramCache]: Analyzing trace with hash -395770423, now seen corresponding path program 14 times [2024-09-20 19:48:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:48:11,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042719937] [2024-09-20 19:48:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:48:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:48:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:48:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:48:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:48:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:12,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2024-09-20 19:48:13,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:48:13,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042719937] [2024-09-20 19:48:13,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042719937] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:48:13,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895505732] [2024-09-20 19:48:13,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:48:13,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:48:13,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:48:13,895 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) [2024-09-20 19:48:13,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 19:48:13,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:48:13,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:48:13,996 WARN L260 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-09-20 19:48:13,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:48:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 11 proven. 321 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-09-20 19:48:15,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:48:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 44 proven. 528 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-09-20 19:48:18,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895505732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:48:18,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:48:18,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 48] total 98 [2024-09-20 19:48:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025317435] [2024-09-20 19:48:18,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:48:18,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-20 19:48:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:48:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-20 19:48:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=9148, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 19:48:18,697 INFO L87 Difference]: Start difference. First operand 78 states and 108 transitions. Second operand has 98 states, 94 states have (on average 1.3936170212765957) internal successors, (131), 56 states have internal predecessors, (131), 19 states have call successors, (21), 1 states have call predecessors, (21), 30 states have return successors, (44), 43 states have call predecessors, (44), 19 states have call successors, (44) [2024-09-20 19:48:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:48:21,327 INFO L93 Difference]: Finished difference Result 97 states and 139 transitions. [2024-09-20 19:48:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 19:48:21,327 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 94 states have (on average 1.3936170212765957) internal successors, (131), 56 states have internal predecessors, (131), 19 states have call successors, (21), 1 states have call predecessors, (21), 30 states have return successors, (44), 43 states have call predecessors, (44), 19 states have call successors, (44) Word has length 114 [2024-09-20 19:48:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:48:21,329 INFO L225 Difference]: With dead ends: 97 [2024-09-20 19:48:21,329 INFO L226 Difference]: Without dead ends: 90 [2024-09-20 19:48:21,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1096, Invalid=16196, Unknown=0, NotChecked=0, Total=17292 [2024-09-20 19:48:21,331 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 3990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:48:21,331 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1299 Invalid, 3990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 19:48:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-20 19:48:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2024-09-20 19:48:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 10 states have call successors, (10), 6 states have call predecessors, (10), 17 states have return successors, (46), 20 states have call predecessors, (46), 9 states have call successors, (46) [2024-09-20 19:48:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 113 transitions. [2024-09-20 19:48:21,362 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 113 transitions. Word has length 114 [2024-09-20 19:48:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:48:21,362 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 113 transitions. [2024-09-20 19:48:21,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 94 states have (on average 1.3936170212765957) internal successors, (131), 56 states have internal predecessors, (131), 19 states have call successors, (21), 1 states have call predecessors, (21), 30 states have return successors, (44), 43 states have call predecessors, (44), 19 states have call successors, (44) [2024-09-20 19:48:21,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 113 transitions. [2024-09-20 19:48:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-20 19:48:21,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:48:21,364 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:48:21,378 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 19:48:21,564 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 19:48:21,564 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:48:21,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1084266083, now seen corresponding path program 15 times [2024-09-20 19:48:21,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:48:21,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630356289] [2024-09-20 19:48:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:48:21,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:48:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:21,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:48:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:21,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:48:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:21,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:21,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:21,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:48:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:22,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:22,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:22,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:22,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2024-09-20 19:48:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:48:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630356289] [2024-09-20 19:48:23,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630356289] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:48:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92004339] [2024-09-20 19:48:23,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:48:23,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:48:23,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:48:23,885 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) [2024-09-20 19:48:23,886 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 19:48:23,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-20 19:48:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:48:23,999 WARN L260 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-20 19:48:24,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:48:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2024-09-20 19:48:25,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:48:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 47 proven. 611 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-20 19:48:29,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92004339] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:48:29,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:48:29,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34, 51] total 104 [2024-09-20 19:48:29,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042902696] [2024-09-20 19:48:29,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:48:29,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-20 19:48:29,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:48:29,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-20 19:48:29,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=10332, Unknown=0, NotChecked=0, Total=10712 [2024-09-20 19:48:29,531 INFO L87 Difference]: Start difference. First operand 81 states and 113 transitions. Second operand has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (22), 1 states have call predecessors, (22), 32 states have return successors, (47), 46 states have call predecessors, (47), 20 states have call successors, (47) [2024-09-20 19:48:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:48:32,305 INFO L93 Difference]: Finished difference Result 100 states and 144 transitions. [2024-09-20 19:48:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 19:48:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (22), 1 states have call predecessors, (22), 32 states have return successors, (47), 46 states have call predecessors, (47), 20 states have call successors, (47) Word has length 121 [2024-09-20 19:48:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:48:32,306 INFO L225 Difference]: With dead ends: 100 [2024-09-20 19:48:32,306 INFO L226 Difference]: Without dead ends: 93 [2024-09-20 19:48:32,308 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1197, Invalid=18263, Unknown=0, NotChecked=0, Total=19460 [2024-09-20 19:48:32,308 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 239 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 4113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:48:32,309 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1248 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 19:48:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-20 19:48:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2024-09-20 19:48:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 10 states have call successors, (10), 6 states have call predecessors, (10), 18 states have return successors, (49), 21 states have call predecessors, (49), 9 states have call successors, (49) [2024-09-20 19:48:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 118 transitions. [2024-09-20 19:48:32,336 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 118 transitions. Word has length 121 [2024-09-20 19:48:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:48:32,336 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 118 transitions. [2024-09-20 19:48:32,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (22), 1 states have call predecessors, (22), 32 states have return successors, (47), 46 states have call predecessors, (47), 20 states have call successors, (47) [2024-09-20 19:48:32,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 118 transitions. [2024-09-20 19:48:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-20 19:48:32,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:48:32,338 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:48:32,350 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 19:48:32,538 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:48:32,538 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:48:32,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1846777569, now seen corresponding path program 16 times [2024-09-20 19:48:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:48:32,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090074551] [2024-09-20 19:48:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:48:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:48:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:32,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:48:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:32,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:48:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:32,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:33,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:33,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:48:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:33,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:33,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:33,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:34,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:35,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:35,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2024-09-20 19:48:35,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:48:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090074551] [2024-09-20 19:48:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090074551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:48:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858820309] [2024-09-20 19:48:35,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:48:35,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:48:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:48:35,220 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) [2024-09-20 19:48:35,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 19:48:35,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:48:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:48:35,341 WARN L260 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 205 conjuncts are in the unsatisfiable core [2024-09-20 19:48:35,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:48:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 13 proven. 416 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2024-09-20 19:48:36,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:48:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 50 proven. 700 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 19:48:41,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858820309] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:48:41,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:48:41,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 36, 54] total 110 [2024-09-20 19:48:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956624108] [2024-09-20 19:48:41,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:48:41,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-20 19:48:41,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:48:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-20 19:48:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=11588, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 19:48:41,413 INFO L87 Difference]: Start difference. First operand 84 states and 118 transitions. Second operand has 110 states, 106 states have (on average 1.3867924528301887) internal successors, (147), 62 states have internal predecessors, (147), 21 states have call successors, (23), 1 states have call predecessors, (23), 34 states have return successors, (50), 49 states have call predecessors, (50), 21 states have call successors, (50) [2024-09-20 19:48:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:48:44,467 INFO L93 Difference]: Finished difference Result 103 states and 149 transitions. [2024-09-20 19:48:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 19:48:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 106 states have (on average 1.3867924528301887) internal successors, (147), 62 states have internal predecessors, (147), 21 states have call successors, (23), 1 states have call predecessors, (23), 34 states have return successors, (50), 49 states have call predecessors, (50), 21 states have call successors, (50) Word has length 128 [2024-09-20 19:48:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:48:44,469 INFO L225 Difference]: With dead ends: 103 [2024-09-20 19:48:44,469 INFO L226 Difference]: Without dead ends: 96 [2024-09-20 19:48:44,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1302, Invalid=20454, Unknown=0, NotChecked=0, Total=21756 [2024-09-20 19:48:44,471 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 214 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 4168 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 4414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 4168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:48:44,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1363 Invalid, 4414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 4168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 19:48:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-20 19:48:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2024-09-20 19:48:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 10 states have call successors, (10), 6 states have call predecessors, (10), 19 states have return successors, (52), 22 states have call predecessors, (52), 9 states have call successors, (52) [2024-09-20 19:48:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 123 transitions. [2024-09-20 19:48:44,499 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 123 transitions. Word has length 128 [2024-09-20 19:48:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:48:44,499 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 123 transitions. [2024-09-20 19:48:44,499 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 106 states have (on average 1.3867924528301887) internal successors, (147), 62 states have internal predecessors, (147), 21 states have call successors, (23), 1 states have call predecessors, (23), 34 states have return successors, (50), 49 states have call predecessors, (50), 21 states have call successors, (50) [2024-09-20 19:48:44,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 123 transitions. [2024-09-20 19:48:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-20 19:48:44,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:48:44,500 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:48:44,516 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 19:48:44,701 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:48:44,701 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:48:44,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:48:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash -709306135, now seen corresponding path program 17 times [2024-09-20 19:48:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:48:44,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392714605] [2024-09-20 19:48:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:48:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:48:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:48:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:48:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:45,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 19:48:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:46,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:46,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:47,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:47,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:47,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:47,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:48,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:48,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:48,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:48,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:48,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:48,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:49,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:49,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:48:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:48:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 80 proven. 796 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2024-09-20 19:48:49,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:48:49,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392714605] [2024-09-20 19:48:49,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392714605] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:48:49,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111202462] [2024-09-20 19:48:49,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:48:49,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:48:49,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:48:49,285 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) [2024-09-20 19:48:49,287 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 19:48:49,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2024-09-20 19:48:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:48:49,447 WARN L260 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 277 conjuncts are in the unsatisfiable core [2024-09-20 19:48:49,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:48:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 14 proven. 763 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2024-09-20 19:48:51,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:48:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 83 proven. 1345 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-09-20 19:48:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111202462] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:48:59,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:48:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 38, 72] total 141 [2024-09-20 19:48:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691538934] [2024-09-20 19:48:59,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:48:59,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-20 19:48:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:48:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-20 19:48:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=19196, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 19:48:59,104 INFO L87 Difference]: Start difference. First operand 87 states and 123 transitions. Second operand has 141 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 80 states have internal predecessors, (190), 27 states have call successors, (29), 1 states have call predecessors, (29), 46 states have return successors, (63), 62 states have call predecessors, (63), 27 states have call successors, (63) [2024-09-20 19:49:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:49:04,335 INFO L93 Difference]: Finished difference Result 119 states and 180 transitions. [2024-09-20 19:49:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-20 19:49:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 80 states have internal predecessors, (190), 27 states have call successors, (29), 1 states have call predecessors, (29), 46 states have return successors, (63), 62 states have call predecessors, (63), 27 states have call successors, (63) Word has length 170 [2024-09-20 19:49:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:49:04,337 INFO L225 Difference]: With dead ends: 119 [2024-09-20 19:49:04,337 INFO L226 Difference]: Without dead ends: 99 [2024-09-20 19:49:04,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2288, Invalid=35154, Unknown=0, NotChecked=0, Total=37442 [2024-09-20 19:49:04,341 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 261 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 6522 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 6940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 6522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:49:04,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1610 Invalid, 6940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 6522 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-20 19:49:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-20 19:49:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2024-09-20 19:49:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 10 states have call successors, (10), 6 states have call predecessors, (10), 20 states have return successors, (55), 23 states have call predecessors, (55), 9 states have call successors, (55) [2024-09-20 19:49:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2024-09-20 19:49:04,375 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 170 [2024-09-20 19:49:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:49:04,375 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2024-09-20 19:49:04,376 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 80 states have internal predecessors, (190), 27 states have call successors, (29), 1 states have call predecessors, (29), 46 states have return successors, (63), 62 states have call predecessors, (63), 27 states have call successors, (63) [2024-09-20 19:49:04,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:49:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2024-09-20 19:49:04,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 19:49:04,377 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:49:04,377 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:49:04,391 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 19:49:04,577 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:49:04,578 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:49:04,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:49:04,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1661807989, now seen corresponding path program 18 times [2024-09-20 19:49:04,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:49:04,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690255831] [2024-09-20 19:49:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:49:04,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:49:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:04,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:49:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:04,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:49:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:05,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:05,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:05,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:49:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:05,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:05,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:06,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:06,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:06,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:06,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:07,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:07,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:07,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:07,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:07,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:07,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:07,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:08,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:08,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2024-09-20 19:49:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:49:08,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690255831] [2024-09-20 19:49:08,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690255831] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:49:08,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697333030] [2024-09-20 19:49:08,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:49:08,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:49:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:49:08,161 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) [2024-09-20 19:49:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 19:49:08,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-20 19:49:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:49:08,321 WARN L260 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-09-20 19:49:08,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:49:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 36 proven. 538 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2024-09-20 19:49:10,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:49:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 57 proven. 899 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-20 19:49:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697333030] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:49:16,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:49:16,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 64] total 127 [2024-09-20 19:49:16,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602612073] [2024-09-20 19:49:16,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:49:16,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2024-09-20 19:49:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:49:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2024-09-20 19:49:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=15519, Unknown=0, NotChecked=0, Total=16002 [2024-09-20 19:49:16,622 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 127 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 73 states have internal predecessors, (170), 23 states have call successors, (25), 1 states have call predecessors, (25), 39 states have return successors, (57), 55 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-20 19:49:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:49:20,516 INFO L93 Difference]: Finished difference Result 109 states and 159 transitions. [2024-09-20 19:49:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-20 19:49:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 73 states have internal predecessors, (170), 23 states have call successors, (25), 1 states have call predecessors, (25), 39 states have return successors, (57), 55 states have call predecessors, (57), 23 states have call successors, (57) Word has length 142 [2024-09-20 19:49:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:49:20,518 INFO L225 Difference]: With dead ends: 109 [2024-09-20 19:49:20,518 INFO L226 Difference]: Without dead ends: 102 [2024-09-20 19:49:20,520 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6169 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1702, Invalid=26690, Unknown=0, NotChecked=0, Total=28392 [2024-09-20 19:49:20,521 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 323 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 5402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:49:20,521 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1602 Invalid, 5402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 4945 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-20 19:49:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-20 19:49:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2024-09-20 19:49:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 10 states have call successors, (10), 6 states have call predecessors, (10), 21 states have return successors, (58), 24 states have call predecessors, (58), 9 states have call successors, (58) [2024-09-20 19:49:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2024-09-20 19:49:20,565 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 142 [2024-09-20 19:49:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:49:20,565 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2024-09-20 19:49:20,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 73 states have internal predecessors, (170), 23 states have call successors, (25), 1 states have call predecessors, (25), 39 states have return successors, (57), 55 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-20 19:49:20,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:49:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2024-09-20 19:49:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-09-20 19:49:20,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:49:20,567 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 24, 24, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:49:20,585 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 19:49:20,768 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 19:49:20,768 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:49:20,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:49:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash 882713721, now seen corresponding path program 19 times [2024-09-20 19:49:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:49:20,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534217011] [2024-09-20 19:49:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:49:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:49:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:49:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:49:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:21,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:22,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:22,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 19:49:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:22,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:23,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:23,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:23,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:24,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:24,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:24,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:24,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:25,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:25,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:25,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:25,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:25,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:25,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:25,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:26,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 92 proven. 1018 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2024-09-20 19:49:26,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:49:26,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534217011] [2024-09-20 19:49:26,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534217011] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:49:26,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597867015] [2024-09-20 19:49:26,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:49:26,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:49:26,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:49:26,133 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) [2024-09-20 19:49:26,133 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 19:49:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:26,316 WARN L260 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 313 conjuncts are in the unsatisfiable core [2024-09-20 19:49:26,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:49:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 16 proven. 980 refuted. 0 times theorem prover too weak. 1181 trivial. 0 not checked. [2024-09-20 19:49:28,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:49:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 95 proven. 1753 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2024-09-20 19:49:38,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597867015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:49:38,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:49:38,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 42, 81] total 158 [2024-09-20 19:49:38,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505816663] [2024-09-20 19:49:38,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:49:38,612 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2024-09-20 19:49:38,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:49:38,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2024-09-20 19:49:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=24194, Unknown=0, NotChecked=0, Total=24806 [2024-09-20 19:49:38,614 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 158 states, 154 states have (on average 1.3831168831168832) internal successors, (213), 89 states have internal predecessors, (213), 30 states have call successors, (32), 1 states have call predecessors, (32), 52 states have return successors, (71), 70 states have call predecessors, (71), 30 states have call successors, (71) [2024-09-20 19:49:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:49:45,620 INFO L93 Difference]: Finished difference Result 127 states and 194 transitions. [2024-09-20 19:49:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-09-20 19:49:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 154 states have (on average 1.3831168831168832) internal successors, (213), 89 states have internal predecessors, (213), 30 states have call successors, (32), 1 states have call predecessors, (32), 52 states have return successors, (71), 70 states have call predecessors, (71), 30 states have call successors, (71) Word has length 191 [2024-09-20 19:49:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:49:45,622 INFO L225 Difference]: With dead ends: 127 [2024-09-20 19:49:45,622 INFO L226 Difference]: Without dead ends: 105 [2024-09-20 19:49:45,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9581 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2736, Invalid=44136, Unknown=0, NotChecked=0, Total=46872 [2024-09-20 19:49:45,626 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 9500 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 10017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 9500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:49:45,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 2291 Invalid, 10017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 9500 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-20 19:49:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-20 19:49:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2024-09-20 19:49:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 10 states have call successors, (10), 6 states have call predecessors, (10), 22 states have return successors, (61), 25 states have call predecessors, (61), 9 states have call successors, (61) [2024-09-20 19:49:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2024-09-20 19:49:45,661 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 191 [2024-09-20 19:49:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:49:45,662 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2024-09-20 19:49:45,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 154 states have (on average 1.3831168831168832) internal successors, (213), 89 states have internal predecessors, (213), 30 states have call successors, (32), 1 states have call predecessors, (32), 52 states have return successors, (71), 70 states have call predecessors, (71), 30 states have call successors, (71) [2024-09-20 19:49:45,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:49:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2024-09-20 19:49:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-20 19:49:45,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:49:45,663 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:49:45,676 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 19:49:45,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 19:49:45,864 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:49:45,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:49:45,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1086059211, now seen corresponding path program 20 times [2024-09-20 19:49:45,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:49:45,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774464595] [2024-09-20 19:49:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:49:45,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:49:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:46,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:49:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:46,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:49:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:46,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:46,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:46,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:49:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:46,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:47,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:47,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:48,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:48,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:48,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:48,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:49,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:50,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:50,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:49:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:49:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 72 proven. 663 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2024-09-20 19:49:50,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:49:50,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774464595] [2024-09-20 19:49:50,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774464595] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:49:50,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894089483] [2024-09-20 19:49:50,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:49:50,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:49:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:49:50,223 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) [2024-09-20 19:49:50,224 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 19:49:50,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:49:50,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:49:50,414 WARN L260 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 253 conjuncts are in the unsatisfiable core [2024-09-20 19:49:50,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:49:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 17 proven. 642 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2024-09-20 19:49:52,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:49:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 62 proven. 1116 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2024-09-20 19:49:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894089483] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:49:59,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:49:59,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 44, 66] total 134 [2024-09-20 19:49:59,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705685244] [2024-09-20 19:49:59,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:49:59,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-20 19:49:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:49:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-20 19:49:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=17332, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 19:49:59,791 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. Second operand has 134 states, 130 states have (on average 1.376923076923077) internal successors, (179), 74 states have internal predecessors, (179), 25 states have call successors, (27), 1 states have call predecessors, (27), 42 states have return successors, (62), 61 states have call predecessors, (62), 25 states have call successors, (62) [2024-09-20 19:50:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:50:04,622 INFO L93 Difference]: Finished difference Result 115 states and 169 transitions. [2024-09-20 19:50:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-20 19:50:04,622 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 130 states have (on average 1.376923076923077) internal successors, (179), 74 states have internal predecessors, (179), 25 states have call successors, (27), 1 states have call predecessors, (27), 42 states have return successors, (62), 61 states have call predecessors, (62), 25 states have call successors, (62) Word has length 156 [2024-09-20 19:50:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:50:04,624 INFO L225 Difference]: With dead ends: 115 [2024-09-20 19:50:04,624 INFO L226 Difference]: Without dead ends: 108 [2024-09-20 19:50:04,627 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6907 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1762, Invalid=30458, Unknown=0, NotChecked=0, Total=32220 [2024-09-20 19:50:04,627 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 387 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 6792 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 7092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 6792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-20 19:50:04,628 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 2278 Invalid, 7092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 6792 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-20 19:50:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-20 19:50:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2024-09-20 19:50:04,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 10 states have call successors, (10), 6 states have call predecessors, (10), 23 states have return successors, (64), 26 states have call predecessors, (64), 9 states have call successors, (64) [2024-09-20 19:50:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 143 transitions. [2024-09-20 19:50:04,676 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 143 transitions. Word has length 156 [2024-09-20 19:50:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:50:04,677 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 143 transitions. [2024-09-20 19:50:04,677 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 130 states have (on average 1.376923076923077) internal successors, (179), 74 states have internal predecessors, (179), 25 states have call successors, (27), 1 states have call predecessors, (27), 42 states have return successors, (62), 61 states have call predecessors, (62), 25 states have call successors, (62) [2024-09-20 19:50:04,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:50:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 143 transitions. [2024-09-20 19:50:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-09-20 19:50:04,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:50:04,678 INFO L216 NwaCegarLoop]: trace histogram [29, 29, 29, 27, 27, 27, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:50:04,695 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 19:50:04,879 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:50:04,879 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:50:04,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:50:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1019719079, now seen corresponding path program 21 times [2024-09-20 19:50:04,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:50:04,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178388639] [2024-09-20 19:50:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:50:04,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:50:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:05,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:50:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:05,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:50:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:05,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:05,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:06,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 19:50:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:07,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:07,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:08,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:08,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:08,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:09,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:09,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:09,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:10,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:10,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:10,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:10,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:10,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:10,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:11,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:11,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:11,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:11,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2732 backedges. 104 proven. 1267 refuted. 0 times theorem prover too weak. 1361 trivial. 0 not checked. [2024-09-20 19:50:11,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:50:11,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178388639] [2024-09-20 19:50:11,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178388639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:50:11,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189792664] [2024-09-20 19:50:11,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:50:11,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:50:11,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:50:11,452 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:50:11,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 19:50:11,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2024-09-20 19:50:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:50:11,706 WARN L260 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 349 conjuncts are in the unsatisfiable core [2024-09-20 19:50:11,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:50:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2732 backedges. 18 proven. 1224 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2024-09-20 19:50:14,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:50:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2732 backedges. 107 proven. 2215 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2024-09-20 19:50:26,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189792664] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:50:26,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:50:26,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 46, 90] total 175 [2024-09-20 19:50:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715796984] [2024-09-20 19:50:26,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:50:26,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2024-09-20 19:50:26,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:50:26,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2024-09-20 19:50:26,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=29770, Unknown=0, NotChecked=0, Total=30450 [2024-09-20 19:50:26,724 INFO L87 Difference]: Start difference. First operand 99 states and 143 transitions. Second operand has 175 states, 171 states have (on average 1.3801169590643274) internal successors, (236), 98 states have internal predecessors, (236), 33 states have call successors, (35), 1 states have call predecessors, (35), 58 states have return successors, (79), 78 states have call predecessors, (79), 33 states have call successors, (79) [2024-09-20 19:50:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:50:35,109 INFO L93 Difference]: Finished difference Result 135 states and 208 transitions. [2024-09-20 19:50:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-20 19:50:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 171 states have (on average 1.3801169590643274) internal successors, (236), 98 states have internal predecessors, (236), 33 states have call successors, (35), 1 states have call predecessors, (35), 58 states have return successors, (79), 78 states have call predecessors, (79), 33 states have call successors, (79) Word has length 212 [2024-09-20 19:50:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:50:35,112 INFO L225 Difference]: With dead ends: 135 [2024-09-20 19:50:35,112 INFO L226 Difference]: Without dead ends: 111 [2024-09-20 19:50:35,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11727 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3220, Invalid=54140, Unknown=0, NotChecked=0, Total=57360 [2024-09-20 19:50:35,117 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 512 mSDsluCounter, 2533 mSDsCounter, 0 mSdLazyCounter, 10971 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 11606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 10971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:50:35,118 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 2567 Invalid, 11606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 10971 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-09-20 19:50:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-20 19:50:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2024-09-20 19:50:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 10 states have call successors, (10), 6 states have call predecessors, (10), 24 states have return successors, (67), 27 states have call predecessors, (67), 9 states have call successors, (67) [2024-09-20 19:50:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 148 transitions. [2024-09-20 19:50:35,205 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 148 transitions. Word has length 212 [2024-09-20 19:50:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:50:35,205 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 148 transitions. [2024-09-20 19:50:35,206 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 171 states have (on average 1.3801169590643274) internal successors, (236), 98 states have internal predecessors, (236), 33 states have call successors, (35), 1 states have call predecessors, (35), 58 states have return successors, (79), 78 states have call predecessors, (79), 33 states have call successors, (79) [2024-09-20 19:50:35,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:50:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 148 transitions. [2024-09-20 19:50:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-20 19:50:35,207 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:50:35,207 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:50:35,221 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 19:50:35,408 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 19:50:35,408 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:50:35,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:50:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1710663391, now seen corresponding path program 22 times [2024-09-20 19:50:35,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:50:35,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438675233] [2024-09-20 19:50:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:50:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:50:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:36,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:50:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:36,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 19:50:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:36,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:36,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:36,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:50:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:36,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:37,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:37,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:38,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:38,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:38,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:39,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:39,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:39,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:39,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:39,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:40,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 19:50:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:50:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 80 proven. 796 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2024-09-20 19:50:41,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:50:41,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438675233] [2024-09-20 19:50:41,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438675233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:50:41,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690997466] [2024-09-20 19:50:41,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:50:41,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:50:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:50:41,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:50:41,024 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 19:50:41,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:50:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:50:41,265 WARN L260 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 277 conjuncts are in the unsatisfiable core [2024-09-20 19:50:41,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:50:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 19 proven. 773 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2024-09-20 19:50:43,832 INFO L327 TraceCheckSpWp]: Computing backward predicates...