./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/seq-3.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:25:36,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:25:36,350 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:25:36,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:25:36,358 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:25:36,386 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:25:36,386 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:25:36,387 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:25:36,387 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:25:36,391 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:25:36,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:25:36,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:25:36,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:25:36,392 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:25:36,392 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:25:36,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:25:36,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:25:36,393 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:25:36,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:25:36,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:25:36,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:25:36,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:25:36,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:25:36,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:25:36,397 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:25:36,397 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:25:36,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:25:36,397 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:25:36,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:25:36,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:25:36,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:25:36,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:25:36,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:25:36,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:25:36,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:25:36,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:25:36,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:25:36,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:25:36,401 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:25:36,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:25:36,401 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:25:36,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:25:36,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:25:36,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:25:36,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:25:36,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:25:36,766 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:25:36,767 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:25:36,768 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/seq-3.i [2024-09-12 15:25:38,273 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:25:38,457 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:25:38,458 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i [2024-09-12 15:25:38,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e620d4cb0/d02df02fb4fc4b159c9133fe2f37bce7/FLAGfa855ae31 [2024-09-12 15:25:38,850 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e620d4cb0/d02df02fb4fc4b159c9133fe2f37bce7 [2024-09-12 15:25:38,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:25:38,854 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:25:38,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:25:38,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:25:38,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:25:38,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:25:38" (1/1) ... [2024-09-12 15:25:38,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0367f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:38, skipping insertion in model container [2024-09-12 15:25:38,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:25:38" (1/1) ... [2024-09-12 15:25:38,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:25:39,034 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2024-09-12 15:25:39,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:25:39,063 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:25:39,074 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2024-09-12 15:25:39,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:25:39,097 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:25:39,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39 WrapperNode [2024-09-12 15:25:39,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:25:39,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:25:39,099 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:25:39,099 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:25:39,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,113 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,118 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:25:39,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:25:39,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:25:39,119 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:25:39,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:25:39,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,131 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,146 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 15:25:39,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,149 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:25:39,160 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:25:39,161 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:25:39,161 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:25:39,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (1/1) ... [2024-09-12 15:25:39,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:25:39,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:39,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 15:25:39,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 15:25:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:25:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:25:39,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:25:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:25:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:25:39,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:25:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:25:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:25:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:25:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:25:39,307 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:25:39,310 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:25:39,481 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-12 15:25:39,482 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:25:39,503 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:25:39,504 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-12 15:25:39,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:25:39 BoogieIcfgContainer [2024-09-12 15:25:39,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:25:39,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:25:39,507 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:25:39,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:25:39,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:25:38" (1/3) ... [2024-09-12 15:25:39,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4ec18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:25:39, skipping insertion in model container [2024-09-12 15:25:39,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:25:39" (2/3) ... [2024-09-12 15:25:39,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4ec18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:25:39, skipping insertion in model container [2024-09-12 15:25:39,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:25:39" (3/3) ... [2024-09-12 15:25:39,512 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2024-09-12 15:25:39,531 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:25:39,532 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:25:39,590 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:25:39,596 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;@c3c6601, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:25:39,596 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:25:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:25:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 15:25:39,610 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:39,610 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:39,611 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:39,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash 961061654, now seen corresponding path program 1 times [2024-09-12 15:25:39,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:39,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910312813] [2024-09-12 15:25:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:39,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:39,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:39,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:39,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910312813] [2024-09-12 15:25:39,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910312813] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:25:39,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:25:39,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-12 15:25:39,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989226801] [2024-09-12 15:25:39,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:25:39,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 15:25:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 15:25:39,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:25:39,959 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:25:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:40,074 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2024-09-12 15:25:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 15:25:40,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 15:25:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:40,084 INFO L225 Difference]: With dead ends: 52 [2024-09-12 15:25:40,084 INFO L226 Difference]: Without dead ends: 28 [2024-09-12 15:25:40,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:25:40,091 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:40,094 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-12 15:25:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2024-09-12 15:25:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:25:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-12 15:25:40,135 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2024-09-12 15:25:40,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:40,136 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-12 15:25:40,136 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:25:40,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-12 15:25:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 15:25:40,138 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:40,139 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:40,139 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:25:40,139 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:40,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1906170241, now seen corresponding path program 1 times [2024-09-12 15:25:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:40,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418296334] [2024-09-12 15:25:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:40,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:40,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:40,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:40,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418296334] [2024-09-12 15:25:40,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418296334] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:40,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33952010] [2024-09-12 15:25:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:40,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:40,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:40,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:25:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:40,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 15:25:40,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:40,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:25:40,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33952010] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:25:40,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:25:40,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-09-12 15:25:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168323553] [2024-09-12 15:25:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:25:40,514 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 15:25:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 15:25:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:25:40,515 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:25:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:40,580 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-09-12 15:25:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:25:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-12 15:25:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:40,581 INFO L225 Difference]: With dead ends: 35 [2024-09-12 15:25:40,581 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 15:25:40,582 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:25:40,583 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:40,583 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:25:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 15:25:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-09-12 15:25:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:25:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-09-12 15:25:40,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 17 [2024-09-12 15:25:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:40,595 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-09-12 15:25:40,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:25:40,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-09-12 15:25:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 15:25:40,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:40,597 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:40,613 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 15:25:40,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:40,798 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:40,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 468810935, now seen corresponding path program 1 times [2024-09-12 15:25:40,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:40,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762886743] [2024-09-12 15:25:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:40,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:40,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:40,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 15:25:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:40,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:40,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762886743] [2024-09-12 15:25:40,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762886743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:40,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234062457] [2024-09-12 15:25:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:40,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:40,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:40,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:25:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:41,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 15:25:41,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:41,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:41,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234062457] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:41,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:41,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-12 15:25:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002300182] [2024-09-12 15:25:41,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:41,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:25:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:25:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:25:41,259 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:41,382 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-09-12 15:25:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:25:41,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-09-12 15:25:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:41,384 INFO L225 Difference]: With dead ends: 51 [2024-09-12 15:25:41,385 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 15:25:41,386 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:25:41,387 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:41,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 15:25:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-09-12 15:25:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:25:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-12 15:25:41,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 24 [2024-09-12 15:25:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:41,399 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-12 15:25:41,400 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:41,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-12 15:25:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 15:25:41,402 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:41,402 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:41,419 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:41,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:41,607 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:41,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1260603702, now seen corresponding path program 1 times [2024-09-12 15:25:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:41,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325380867] [2024-09-12 15:25:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:41,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:41,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-12 15:25:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:41,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:41,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325380867] [2024-09-12 15:25:41,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325380867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706336137] [2024-09-12 15:25:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:41,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:41,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:41,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:25:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:41,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 15:25:41,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:41,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706336137] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:41,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-09-12 15:25:41,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956194339] [2024-09-12 15:25:41,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:41,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 15:25:41,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 15:25:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-09-12 15:25:41,970 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:42,039 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-09-12 15:25:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:25:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-09-12 15:25:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:42,041 INFO L225 Difference]: With dead ends: 54 [2024-09-12 15:25:42,041 INFO L226 Difference]: Without dead ends: 40 [2024-09-12 15:25:42,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:25:42,042 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:42,043 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 105 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:25:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-12 15:25:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-09-12 15:25:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:25:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-12 15:25:42,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2024-09-12 15:25:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:42,050 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-12 15:25:42,050 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:42,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-12 15:25:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 15:25:42,051 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:42,051 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:42,063 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:42,252 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:42,252 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:42,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1756686302, now seen corresponding path program 2 times [2024-09-12 15:25:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:42,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94801305] [2024-09-12 15:25:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:42,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:42,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 15:25:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94801305] [2024-09-12 15:25:42,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94801305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:42,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956954131] [2024-09-12 15:25:42,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:25:42,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:42,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:42,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:42,371 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:25:42,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:25:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:42,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:25:42,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:42,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:25:42,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956954131] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:42,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:42,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-09-12 15:25:42,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948075166] [2024-09-12 15:25:42,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:42,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 15:25:42,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 15:25:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:25:42,532 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:25:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:42,601 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-12 15:25:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:25:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-09-12 15:25:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:42,603 INFO L225 Difference]: With dead ends: 45 [2024-09-12 15:25:42,603 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 15:25:42,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:25:42,604 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:42,605 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 15:25:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2024-09-12 15:25:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-09-12 15:25:42,612 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 25 [2024-09-12 15:25:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:42,612 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-09-12 15:25:42,612 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:25:42,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-09-12 15:25:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:25:42,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:42,613 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:42,630 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:25:42,814 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:42,814 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:42,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:42,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2027964682, now seen corresponding path program 3 times [2024-09-12 15:25:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7928186] [2024-09-12 15:25:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:42,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:42,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:42,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 15:25:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:42,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:25:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7928186] [2024-09-12 15:25:42,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7928186] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546946517] [2024-09-12 15:25:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:25:42,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:42,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:42,994 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:25:43,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:25:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:43,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 15:25:43,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:43,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:43,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546946517] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:43,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-12 15:25:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065686358] [2024-09-12 15:25:43,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:43,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:25:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:25:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:25:43,337 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:43,454 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-12 15:25:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 15:25:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-12 15:25:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:43,456 INFO L225 Difference]: With dead ends: 68 [2024-09-12 15:25:43,456 INFO L226 Difference]: Without dead ends: 51 [2024-09-12 15:25:43,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-12 15:25:43,458 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:43,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 170 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-12 15:25:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-12 15:25:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-12 15:25:43,465 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-09-12 15:25:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:43,465 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-12 15:25:43,474 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:43,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-12 15:25:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:25:43,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:43,475 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:43,492 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:25:43,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 15:25:43,676 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:43,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 196646005, now seen corresponding path program 1 times [2024-09-12 15:25:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:43,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853317025] [2024-09-12 15:25:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:43,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:43,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 15:25:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:43,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:25:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:43,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:43,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853317025] [2024-09-12 15:25:43,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853317025] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:43,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734783696] [2024-09-12 15:25:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:43,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:43,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:43,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:43,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:25:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:43,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 15:25:43,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:44,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:44,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734783696] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:44,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:44,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-09-12 15:25:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588833768] [2024-09-12 15:25:44,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:44,156 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:25:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:25:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:25:44,157 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:44,248 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2024-09-12 15:25:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 15:25:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-12 15:25:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:44,249 INFO L225 Difference]: With dead ends: 69 [2024-09-12 15:25:44,249 INFO L226 Difference]: Without dead ends: 52 [2024-09-12 15:25:44,250 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:25:44,250 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:44,251 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-12 15:25:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2024-09-12 15:25:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-12 15:25:44,262 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-09-12 15:25:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:44,262 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-12 15:25:44,262 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:44,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-12 15:25:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:25:44,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:44,264 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:44,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 15:25:44,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:44,465 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:44,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1948349674, now seen corresponding path program 2 times [2024-09-12 15:25:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687392911] [2024-09-12 15:25:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:44,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:44,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:44,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-12 15:25:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:44,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:25:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:44,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:44,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687392911] [2024-09-12 15:25:44,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687392911] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91476772] [2024-09-12 15:25:44,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:25:44,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:44,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:44,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:44,607 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:25:44,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:25:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:44,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 15:25:44,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:44,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:44,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91476772] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:44,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:44,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2024-09-12 15:25:44,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099025646] [2024-09-12 15:25:44,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:44,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 15:25:44,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:44,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 15:25:44,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:25:44,862 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:44,954 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-09-12 15:25:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 15:25:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-12 15:25:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:44,957 INFO L225 Difference]: With dead ends: 71 [2024-09-12 15:25:44,957 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 15:25:44,958 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:25:44,959 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:44,959 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 15:25:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2024-09-12 15:25:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-12 15:25:44,966 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 32 [2024-09-12 15:25:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:44,967 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-12 15:25:44,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:44,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:44,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-12 15:25:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 15:25:44,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:44,968 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:44,984 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 15:25:45,169 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:45,169 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:45,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash 21542753, now seen corresponding path program 4 times [2024-09-12 15:25:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:45,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128554375] [2024-09-12 15:25:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:25:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:25:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:45,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:45,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128554375] [2024-09-12 15:25:45,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128554375] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:45,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082214713] [2024-09-12 15:25:45,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:25:45,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:45,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:45,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:45,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:25:45,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:25:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:45,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:25:45,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:45,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:25:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082214713] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:45,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-12 15:25:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914993392] [2024-09-12 15:25:45,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:45,465 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:25:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:25:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:25:45,466 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:25:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:45,541 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2024-09-12 15:25:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:25:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2024-09-12 15:25:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:45,542 INFO L225 Difference]: With dead ends: 55 [2024-09-12 15:25:45,542 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 15:25:45,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-12 15:25:45,543 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:45,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 15:25:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-09-12 15:25:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:25:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-09-12 15:25:45,558 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 33 [2024-09-12 15:25:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:45,558 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-09-12 15:25:45,558 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:25:45,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-09-12 15:25:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:25:45,563 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:45,563 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:45,581 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:45,763 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:45,764 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:45,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1043643689, now seen corresponding path program 5 times [2024-09-12 15:25:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:45,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722211172] [2024-09-12 15:25:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:45,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:25:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:25:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:25:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:45,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722211172] [2024-09-12 15:25:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722211172] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:45,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130231639] [2024-09-12 15:25:45,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:25:45,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:45,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:45,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:45,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:25:45,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 15:25:45,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:45,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:25:45,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:46,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130231639] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:46,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:46,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-12 15:25:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935210183] [2024-09-12 15:25:46,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:46,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 15:25:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 15:25:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-09-12 15:25:46,292 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:46,459 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2024-09-12 15:25:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:25:46,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-12 15:25:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:46,461 INFO L225 Difference]: With dead ends: 85 [2024-09-12 15:25:46,461 INFO L226 Difference]: Without dead ends: 65 [2024-09-12 15:25:46,462 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:25:46,462 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:46,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 247 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-12 15:25:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2024-09-12 15:25:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:25:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-12 15:25:46,475 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-12 15:25:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:46,476 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-12 15:25:46,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-12 15:25:46,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:25:46,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:46,477 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:46,490 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:46,678 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 15:25:46,678 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:46,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash -802541226, now seen corresponding path program 2 times [2024-09-12 15:25:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:46,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089818459] [2024-09-12 15:25:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:46,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:46,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:25:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:46,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:25:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:46,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:25:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:46,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089818459] [2024-09-12 15:25:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089818459] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:46,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745300340] [2024-09-12 15:25:46,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:25:46,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:46,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:46,842 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:46,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 15:25:46,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:25:46,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:46,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:25:46,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:47,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:47,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745300340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:47,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:47,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-12 15:25:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473434850] [2024-09-12 15:25:47,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:47,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:25:47,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:25:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:25:47,185 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:47,304 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2024-09-12 15:25:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:25:47,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-12 15:25:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:47,305 INFO L225 Difference]: With dead ends: 87 [2024-09-12 15:25:47,305 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 15:25:47,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-09-12 15:25:47,306 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:47,307 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 15:25:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-09-12 15:25:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:25:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-12 15:25:47,314 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-12 15:25:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:47,314 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-12 15:25:47,315 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:47,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-12 15:25:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:25:47,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:47,316 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:47,331 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:47,519 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 15:25:47,519 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:47,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1560540919, now seen corresponding path program 3 times [2024-09-12 15:25:47,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:47,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063848261] [2024-09-12 15:25:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:47,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:47,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:47,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:25:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:47,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:25:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:47,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:25:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:47,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:47,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063848261] [2024-09-12 15:25:47,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063848261] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:47,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618554672] [2024-09-12 15:25:47,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:25:47,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:47,688 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:47,689 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 15:25:47,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:25:47,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:47,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:25:47,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:47,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:47,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618554672] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:47,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2024-09-12 15:25:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309000696] [2024-09-12 15:25:47,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:48,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:25:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:25:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:25:48,001 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:48,114 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2024-09-12 15:25:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:25:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-12 15:25:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:48,117 INFO L225 Difference]: With dead ends: 87 [2024-09-12 15:25:48,117 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 15:25:48,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:25:48,118 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:48,118 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 154 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 15:25:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-09-12 15:25:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:25:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-12 15:25:48,132 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-12 15:25:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:48,133 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-12 15:25:48,133 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:48,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-12 15:25:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:25:48,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:48,134 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:48,150 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:48,334 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:48,334 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:48,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 251296054, now seen corresponding path program 3 times [2024-09-12 15:25:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949151560] [2024-09-12 15:25:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:48,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:48,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:25:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:48,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:25:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:48,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:25:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:48,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949151560] [2024-09-12 15:25:48,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949151560] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649528032] [2024-09-12 15:25:48,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:25:48,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:48,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:48,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:48,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 15:25:48,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:25:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:48,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:25:48,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:48,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:48,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649528032] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:48,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:48,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2024-09-12 15:25:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993006824] [2024-09-12 15:25:48,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:48,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 15:25:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 15:25:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-12 15:25:48,775 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:48,895 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-09-12 15:25:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:25:48,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-12 15:25:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:48,896 INFO L225 Difference]: With dead ends: 88 [2024-09-12 15:25:48,896 INFO L226 Difference]: Without dead ends: 68 [2024-09-12 15:25:48,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:25:48,897 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:48,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-12 15:25:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2024-09-12 15:25:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:25:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-09-12 15:25:48,911 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2024-09-12 15:25:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:48,911 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-09-12 15:25:48,911 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:25:48,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-09-12 15:25:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 15:25:48,912 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:48,912 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:48,928 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 15:25:49,112 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 15:25:49,113 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:49,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash -74536894, now seen corresponding path program 6 times [2024-09-12 15:25:49,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:49,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313703508] [2024-09-12 15:25:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:49,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:25:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:25:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:25:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:49,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313703508] [2024-09-12 15:25:49,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313703508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813112724] [2024-09-12 15:25:49,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:25:49,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:49,213 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:49,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 15:25:49,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:25:49,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:49,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:25:49,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:49,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:25:49,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813112724] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:49,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:49,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-12 15:25:49,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099598560] [2024-09-12 15:25:49,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:49,378 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 15:25:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:49,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 15:25:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-12 15:25:49,381 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:49,461 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-12 15:25:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:25:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-09-12 15:25:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:49,463 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:25:49,463 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 15:25:49,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:25:49,465 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:49,465 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 155 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 15:25:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2024-09-12 15:25:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2024-09-12 15:25:49,486 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2024-09-12 15:25:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:49,487 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2024-09-12 15:25:49,487 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:25:49,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:49,487 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2024-09-12 15:25:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:25:49,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:49,488 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:49,505 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:49,688 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 15:25:49,689 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:49,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 115327702, now seen corresponding path program 7 times [2024-09-12 15:25:49,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:49,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183026331] [2024-09-12 15:25:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:25:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:25:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:25:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:25:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:49,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183026331] [2024-09-12 15:25:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183026331] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:49,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274981878] [2024-09-12 15:25:49,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:25:49,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:49,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:49,896 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:49,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 15:25:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:49,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:25:49,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:50,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274981878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:50,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-12 15:25:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983979021] [2024-09-12 15:25:50,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:50,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 15:25:50,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 15:25:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2024-09-12 15:25:50,346 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:50,481 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2024-09-12 15:25:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:25:50,481 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-12 15:25:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:50,483 INFO L225 Difference]: With dead ends: 102 [2024-09-12 15:25:50,483 INFO L226 Difference]: Without dead ends: 79 [2024-09-12 15:25:50,485 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:25:50,485 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:50,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-12 15:25:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-09-12 15:25:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-12 15:25:50,497 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-12 15:25:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:50,497 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-12 15:25:50,497 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:50,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-12 15:25:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:25:50,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:50,498 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:50,515 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 15:25:50,699 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 15:25:50,699 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:50,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash 73646677, now seen corresponding path program 4 times [2024-09-12 15:25:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:50,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747691253] [2024-09-12 15:25:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:50,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:50,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:25:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:50,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:25:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:50,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:25:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:50,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:25:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:50,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:50,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747691253] [2024-09-12 15:25:50,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747691253] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:50,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265624714] [2024-09-12 15:25:50,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:25:50,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:50,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:50,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:50,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 15:25:50,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:25:50,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:50,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:25:50,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:51,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:51,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265624714] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:51,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:51,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2024-09-12 15:25:51,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385799114] [2024-09-12 15:25:51,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:51,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 15:25:51,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:51,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 15:25:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:25:51,288 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:51,416 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2024-09-12 15:25:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:25:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-12 15:25:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:51,418 INFO L225 Difference]: With dead ends: 105 [2024-09-12 15:25:51,418 INFO L226 Difference]: Without dead ends: 82 [2024-09-12 15:25:51,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-09-12 15:25:51,419 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:51,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-12 15:25:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2024-09-12 15:25:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-12 15:25:51,427 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-12 15:25:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:51,427 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-12 15:25:51,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:51,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-12 15:25:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:25:51,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:51,428 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:51,443 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:51,629 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 15:25:51,629 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:51,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1867360522, now seen corresponding path program 5 times [2024-09-12 15:25:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:51,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292902056] [2024-09-12 15:25:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:51,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:51,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:25:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:51,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:25:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:51,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:25:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:51,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:25:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:51,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292902056] [2024-09-12 15:25:51,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292902056] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120508211] [2024-09-12 15:25:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:25:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:51,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:51,833 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 15:25:51,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:25:51,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:51,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:25:51,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:52,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:52,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120508211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:52,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:52,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2024-09-12 15:25:52,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257217382] [2024-09-12 15:25:52,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:52,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 15:25:52,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:52,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 15:25:52,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-09-12 15:25:52,228 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:52,323 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2024-09-12 15:25:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:25:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-12 15:25:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:52,325 INFO L225 Difference]: With dead ends: 106 [2024-09-12 15:25:52,325 INFO L226 Difference]: Without dead ends: 83 [2024-09-12 15:25:52,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:25:52,326 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:52,326 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 164 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-12 15:25:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2024-09-12 15:25:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-12 15:25:52,337 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-12 15:25:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:52,337 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-12 15:25:52,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:52,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-12 15:25:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:25:52,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:52,338 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:52,353 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:52,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:52,543 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:52,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash 702425653, now seen corresponding path program 6 times [2024-09-12 15:25:52,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:52,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066040736] [2024-09-12 15:25:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:52,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:52,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:25:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:52,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:25:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:52,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:25:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:52,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:25:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:52,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066040736] [2024-09-12 15:25:52,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066040736] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:52,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286438121] [2024-09-12 15:25:52,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:25:52,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:52,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:52,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 15:25:52,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:25:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:52,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:25:52,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:52,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:53,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286438121] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:53,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:53,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2024-09-12 15:25:53,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468521350] [2024-09-12 15:25:53,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:53,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 15:25:53,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 15:25:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:25:53,073 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:53,185 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2024-09-12 15:25:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:25:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-12 15:25:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:53,187 INFO L225 Difference]: With dead ends: 105 [2024-09-12 15:25:53,187 INFO L226 Difference]: Without dead ends: 82 [2024-09-12 15:25:53,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-09-12 15:25:53,188 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:53,188 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-12 15:25:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2024-09-12 15:25:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-12 15:25:53,201 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-12 15:25:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:53,201 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-12 15:25:53,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:53,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-12 15:25:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:25:53,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:53,202 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:53,219 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-12 15:25:53,403 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 15:25:53,403 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:53,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1616605974, now seen corresponding path program 4 times [2024-09-12 15:25:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:53,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406639271] [2024-09-12 15:25:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:53,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:53,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:25:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:53,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:25:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:53,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:25:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:53,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:25:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:53,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406639271] [2024-09-12 15:25:53,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406639271] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:53,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937737858] [2024-09-12 15:25:53,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:25:53,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:53,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:53,564 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:53,565 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 15:25:53,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:25:53,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:53,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:25:53,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:53,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937737858] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:53,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:53,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2024-09-12 15:25:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599867939] [2024-09-12 15:25:53,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:53,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 15:25:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 15:25:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-09-12 15:25:53,923 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:54,034 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2024-09-12 15:25:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:25:54,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-12 15:25:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:54,036 INFO L225 Difference]: With dead ends: 105 [2024-09-12 15:25:54,036 INFO L226 Difference]: Without dead ends: 82 [2024-09-12 15:25:54,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:25:54,037 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:54,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 176 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-12 15:25:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2024-09-12 15:25:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:25:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-09-12 15:25:54,048 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 48 [2024-09-12 15:25:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:54,049 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-09-12 15:25:54,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:25:54,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-09-12 15:25:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:25:54,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:54,053 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:54,066 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 15:25:54,253 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:54,253 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:54,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:54,254 INFO L85 PathProgramCache]: Analyzing trace with hash -972518079, now seen corresponding path program 8 times [2024-09-12 15:25:54,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:54,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053803421] [2024-09-12 15:25:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:54,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:54,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:25:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:54,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:25:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:54,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:25:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:54,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:25:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:54,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:54,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053803421] [2024-09-12 15:25:54,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053803421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:54,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670700149] [2024-09-12 15:25:54,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:25:54,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:54,366 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:54,368 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 15:25:54,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:25:54,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:54,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 15:25:54,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:54,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 15:25:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670700149] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:54,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-09-12 15:25:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084829698] [2024-09-12 15:25:54,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:54,572 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 15:25:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 15:25:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:25:54,572 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:25:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:54,638 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2024-09-12 15:25:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 15:25:54,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2024-09-12 15:25:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:54,639 INFO L225 Difference]: With dead ends: 75 [2024-09-12 15:25:54,639 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 15:25:54,640 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 12 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-09-12 15:25:54,640 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:54,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 127 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 15:25:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-09-12 15:25:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.150943396226415) internal successors, (61), 54 states have internal predecessors, (61), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:25:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-09-12 15:25:54,654 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 49 [2024-09-12 15:25:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:54,654 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-09-12 15:25:54,654 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:25:54,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-09-12 15:25:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:25:54,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:54,656 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:54,669 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:54,859 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:54,860 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:54,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash 931729655, now seen corresponding path program 9 times [2024-09-12 15:25:54,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:54,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161504753] [2024-09-12 15:25:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:55,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:55,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:25:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:55,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:25:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:55,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:25:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:55,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:25:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:55,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:25:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:55,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:55,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161504753] [2024-09-12 15:25:55,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161504753] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:55,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21462282] [2024-09-12 15:25:55,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:25:55,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:55,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:55,060 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:55,061 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 15:25:55,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 15:25:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:55,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:25:55,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:55,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21462282] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:55,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:55,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-12 15:25:55,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204745276] [2024-09-12 15:25:55,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:55,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 15:25:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 15:25:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 15:25:55,540 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:55,690 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2024-09-12 15:25:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:25:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-12 15:25:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:55,691 INFO L225 Difference]: With dead ends: 119 [2024-09-12 15:25:55,692 INFO L226 Difference]: Without dead ends: 93 [2024-09-12 15:25:55,692 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:25:55,693 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:55,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 248 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-12 15:25:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2024-09-12 15:25:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:25:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-12 15:25:55,704 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-12 15:25:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:55,704 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-12 15:25:55,704 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:55,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-12 15:25:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:25:55,705 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:55,705 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:55,722 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:55,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-12 15:25:55,906 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:55,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1164893834, now seen corresponding path program 7 times [2024-09-12 15:25:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086403424] [2024-09-12 15:25:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:25:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:25:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:25:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:25:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:25:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:56,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086403424] [2024-09-12 15:25:56,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086403424] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:56,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061308202] [2024-09-12 15:25:56,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:25:56,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:56,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:56,081 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:56,083 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 15:25:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:56,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:25:56,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:56,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:56,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061308202] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:56,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:56,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2024-09-12 15:25:56,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953314904] [2024-09-12 15:25:56,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:56,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:25:56,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:25:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:25:56,543 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:56,662 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-09-12 15:25:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:25:56,663 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-12 15:25:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:56,664 INFO L225 Difference]: With dead ends: 123 [2024-09-12 15:25:56,664 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 15:25:56,664 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 98 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 15:25:56,665 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:56,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 212 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 15:25:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2024-09-12 15:25:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:25:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-12 15:25:56,676 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-12 15:25:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:56,677 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-12 15:25:56,677 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:56,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-12 15:25:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:25:56,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:56,678 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:56,691 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-12 15:25:56,878 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:56,879 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:56,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash -401242857, now seen corresponding path program 8 times [2024-09-12 15:25:56,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:56,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929628751] [2024-09-12 15:25:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:56,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:57,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:57,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:25:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:57,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:25:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:57,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:25:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:57,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:25:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:57,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:25:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:57,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:57,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929628751] [2024-09-12 15:25:57,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929628751] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:57,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41886829] [2024-09-12 15:25:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:25:57,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:57,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:57,048 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) [2024-09-12 15:25:57,050 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 15:25:57,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:25:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:57,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:25:57,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:57,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:57,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41886829] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:57,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:57,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2024-09-12 15:25:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074667832] [2024-09-12 15:25:57,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:57,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-12 15:25:57,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-12 15:25:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2024-09-12 15:25:57,497 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:57,637 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2024-09-12 15:25:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:25:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-12 15:25:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:57,638 INFO L225 Difference]: With dead ends: 125 [2024-09-12 15:25:57,638 INFO L226 Difference]: Without dead ends: 99 [2024-09-12 15:25:57,639 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:25:57,639 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:57,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 256 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-12 15:25:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2024-09-12 15:25:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:25:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-12 15:25:57,648 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-12 15:25:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:57,648 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-12 15:25:57,649 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:57,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-12 15:25:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:25:57,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:57,649 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:57,661 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:57,852 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-12 15:25:57,852 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:57,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash 177580374, now seen corresponding path program 9 times [2024-09-12 15:25:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:57,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854135791] [2024-09-12 15:25:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:25:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:25:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:25:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:25:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:25:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:58,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:58,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854135791] [2024-09-12 15:25:58,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854135791] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:58,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191094009] [2024-09-12 15:25:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:25:58,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:58,042 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) [2024-09-12 15:25:58,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 15:25:58,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 15:25:58,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:58,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:25:58,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:58,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191094009] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:58,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:58,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2024-09-12 15:25:58,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405533144] [2024-09-12 15:25:58,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:58,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:25:58,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:25:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:25:58,444 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:58,559 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2024-09-12 15:25:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:25:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-12 15:25:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:58,561 INFO L225 Difference]: With dead ends: 125 [2024-09-12 15:25:58,561 INFO L226 Difference]: Without dead ends: 99 [2024-09-12 15:25:58,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2024-09-12 15:25:58,562 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:58,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 210 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-12 15:25:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2024-09-12 15:25:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:25:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-12 15:25:58,574 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-12 15:25:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:58,574 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-12 15:25:58,574 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:58,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:58,575 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-12 15:25:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:25:58,575 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:58,575 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:58,591 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 15:25:58,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 15:25:58,780 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:58,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 57704759, now seen corresponding path program 10 times [2024-09-12 15:25:58,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:58,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104516245] [2024-09-12 15:25:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:58,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:25:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:25:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:25:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:25:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:25:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:58,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:58,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104516245] [2024-09-12 15:25:58,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104516245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:58,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074471283] [2024-09-12 15:25:58,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:25:58,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:58,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:58,951 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:58,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 15:25:58,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:25:58,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:58,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:25:58,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:25:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:59,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:25:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074471283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:25:59,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:25:59,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2024-09-12 15:25:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935748916] [2024-09-12 15:25:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:25:59,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 15:25:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:25:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 15:25:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2024-09-12 15:25:59,326 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:25:59,449 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-09-12 15:25:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:25:59,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-12 15:25:59,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:25:59,451 INFO L225 Difference]: With dead ends: 123 [2024-09-12 15:25:59,451 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 15:25:59,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:25:59,452 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:25:59,452 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 219 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:25:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 15:25:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2024-09-12 15:25:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:25:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-12 15:25:59,462 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-12 15:25:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:25:59,463 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-12 15:25:59,463 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:25:59,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-12 15:25:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:25:59,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:25:59,464 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:25:59,478 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-12 15:25:59,664 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 15:25:59,664 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:25:59,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:25:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1747277514, now seen corresponding path program 5 times [2024-09-12 15:25:59,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:25:59,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477428130] [2024-09-12 15:25:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:25:59,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:25:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:59,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:25:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:59,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:25:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:59,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:25:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:59,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:25:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:59,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:25:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:59,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:25:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:25:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:25:59,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:25:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477428130] [2024-09-12 15:25:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477428130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:25:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313843223] [2024-09-12 15:25:59,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:25:59,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:25:59,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:25:59,829 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:25:59,840 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 15:25:59,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 15:25:59,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:25:59,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:25:59,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:26:00,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:26:00,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313843223] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:00,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:00,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-09-12 15:26:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742327185] [2024-09-12 15:26:00,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:00,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 15:26:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 15:26:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:26:00,191 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:00,333 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2024-09-12 15:26:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:26:00,334 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-12 15:26:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:00,335 INFO L225 Difference]: With dead ends: 122 [2024-09-12 15:26:00,335 INFO L226 Difference]: Without dead ends: 96 [2024-09-12 15:26:00,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2024-09-12 15:26:00,335 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:00,336 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-12 15:26:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 72. [2024-09-12 15:26:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:26:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2024-09-12 15:26:00,348 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 56 [2024-09-12 15:26:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:00,348 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2024-09-12 15:26:00,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:00,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2024-09-12 15:26:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:26:00,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:00,349 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:00,362 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:00,552 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 15:26:00,552 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:00,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:00,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1189232738, now seen corresponding path program 10 times [2024-09-12 15:26:00,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:00,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244517241] [2024-09-12 15:26:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:00,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:00,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:00,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:00,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:00,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:00,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:00,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:26:00,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244517241] [2024-09-12 15:26:00,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244517241] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046316547] [2024-09-12 15:26:00,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:26:00,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:00,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:00,684 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:00,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 15:26:00,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:26:00,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:00,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:00,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:26:00,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 15:26:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046316547] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:00,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2024-09-12 15:26:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117032024] [2024-09-12 15:26:00,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:00,890 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 15:26:00,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 15:26:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-12 15:26:00,891 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:26:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:00,996 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2024-09-12 15:26:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:26:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-09-12 15:26:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:00,998 INFO L225 Difference]: With dead ends: 85 [2024-09-12 15:26:00,998 INFO L226 Difference]: Without dead ends: 83 [2024-09-12 15:26:00,998 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:26:00,998 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:00,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 181 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-12 15:26:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2024-09-12 15:26:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 62 states have internal predecessors, (70), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2024-09-12 15:26:01,010 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 57 [2024-09-12 15:26:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:01,011 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2024-09-12 15:26:01,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:26:01,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2024-09-12 15:26:01,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:26:01,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:01,012 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:01,032 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:01,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:01,215 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:01,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1762212170, now seen corresponding path program 11 times [2024-09-12 15:26:01,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:01,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012995329] [2024-09-12 15:26:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:01,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:26:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:01,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:01,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012995329] [2024-09-12 15:26:01,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012995329] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:01,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409126386] [2024-09-12 15:26:01,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:01,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:01,452 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:01,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 15:26:01,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 15:26:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:01,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:01,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:01,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:01,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409126386] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:01,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:01,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-12 15:26:01,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305118148] [2024-09-12 15:26:01,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:01,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 15:26:01,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 15:26:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:26:01,999 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:02,133 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2024-09-12 15:26:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:26:02,133 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-12 15:26:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:02,134 INFO L225 Difference]: With dead ends: 136 [2024-09-12 15:26:02,134 INFO L226 Difference]: Without dead ends: 107 [2024-09-12 15:26:02,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:26:02,135 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:02,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 183 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-12 15:26:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2024-09-12 15:26:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-12 15:26:02,149 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-12 15:26:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:02,149 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-12 15:26:02,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:02,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-12 15:26:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:26:02,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:02,150 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:02,166 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-12 15:26:02,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-12 15:26:02,354 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:02,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1726081077, now seen corresponding path program 11 times [2024-09-12 15:26:02,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:02,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441602124] [2024-09-12 15:26:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:02,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:26:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:02,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441602124] [2024-09-12 15:26:02,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441602124] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:02,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105534196] [2024-09-12 15:26:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:02,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:02,592 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:02,593 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-12 15:26:02,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 15:26:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:02,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:02,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:02,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105534196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:03,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:03,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2024-09-12 15:26:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495134333] [2024-09-12 15:26:03,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:03,052 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:26:03,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:26:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:26:03,053 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:03,211 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2024-09-12 15:26:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:26:03,211 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-12 15:26:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:03,212 INFO L225 Difference]: With dead ends: 141 [2024-09-12 15:26:03,212 INFO L226 Difference]: Without dead ends: 112 [2024-09-12 15:26:03,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:26:03,214 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:03,214 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 194 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-12 15:26:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2024-09-12 15:26:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-12 15:26:03,228 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-12 15:26:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:03,228 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-12 15:26:03,228 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:03,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-12 15:26:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:26:03,229 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:03,229 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:03,240 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-12 15:26:03,429 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 15:26:03,430 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:03,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:03,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 12 times [2024-09-12 15:26:03,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:03,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562728423] [2024-09-12 15:26:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:03,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:26:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:03,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562728423] [2024-09-12 15:26:03,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562728423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:03,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719335193] [2024-09-12 15:26:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:03,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:03,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:03,616 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:03,617 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-12 15:26:03,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 15:26:03,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:03,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:03,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:03,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719335193] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:04,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2024-09-12 15:26:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978602001] [2024-09-12 15:26:04,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:04,078 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-12 15:26:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-12 15:26:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 15:26:04,079 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:04,266 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2024-09-12 15:26:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:26:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-12 15:26:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:04,267 INFO L225 Difference]: With dead ends: 144 [2024-09-12 15:26:04,268 INFO L226 Difference]: Without dead ends: 115 [2024-09-12 15:26:04,268 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:26:04,269 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:04,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 230 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-12 15:26:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2024-09-12 15:26:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-12 15:26:04,285 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-12 15:26:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:04,286 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-12 15:26:04,286 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:04,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-12 15:26:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:26:04,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:04,287 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:04,300 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:04,487 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:04,487 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:04,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1162907669, now seen corresponding path program 13 times [2024-09-12 15:26:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:04,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222085561] [2024-09-12 15:26:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:04,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:26:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 53 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:04,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:04,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222085561] [2024-09-12 15:26:04,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222085561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:04,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974089336] [2024-09-12 15:26:04,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:04,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:04,696 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:04,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-12 15:26:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:04,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:04,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:05,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974089336] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:05,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:05,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2024-09-12 15:26:05,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618993] [2024-09-12 15:26:05,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:05,217 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 15:26:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:05,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 15:26:05,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:26:05,219 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:05,400 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2024-09-12 15:26:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:26:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-12 15:26:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:05,402 INFO L225 Difference]: With dead ends: 145 [2024-09-12 15:26:05,402 INFO L226 Difference]: Without dead ends: 116 [2024-09-12 15:26:05,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 15:26:05,403 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:05,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 229 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-12 15:26:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2024-09-12 15:26:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-12 15:26:05,421 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-12 15:26:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:05,421 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-12 15:26:05,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:05,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-12 15:26:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:26:05,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:05,422 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:05,438 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-12 15:26:05,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-12 15:26:05,623 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:05,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1920338186, now seen corresponding path program 14 times [2024-09-12 15:26:05,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:05,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242886027] [2024-09-12 15:26:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:05,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:26:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242886027] [2024-09-12 15:26:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242886027] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888833432] [2024-09-12 15:26:05,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:26:05,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:05,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:05,832 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:05,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-12 15:26:05,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:26:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:05,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:05,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:06,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:06,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888833432] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:06,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:06,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2024-09-12 15:26:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076447171] [2024-09-12 15:26:06,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:06,328 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 15:26:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 15:26:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 15:26:06,329 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:06,516 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2024-09-12 15:26:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:26:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-12 15:26:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:06,517 INFO L225 Difference]: With dead ends: 144 [2024-09-12 15:26:06,518 INFO L226 Difference]: Without dead ends: 115 [2024-09-12 15:26:06,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:26:06,519 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:06,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 217 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-12 15:26:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2024-09-12 15:26:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-12 15:26:06,539 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-12 15:26:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:06,539 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-12 15:26:06,540 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:06,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-12 15:26:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:26:06,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:06,540 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:06,556 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:06,741 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:06,741 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:06,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash 889696245, now seen corresponding path program 15 times [2024-09-12 15:26:06,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:06,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803269283] [2024-09-12 15:26:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:26:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:06,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:06,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803269283] [2024-09-12 15:26:06,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803269283] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:06,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556245652] [2024-09-12 15:26:06,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:26:06,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:06,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:06,970 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:06,972 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-12 15:26:07,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 15:26:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:07,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:07,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:07,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:07,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556245652] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:07,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:07,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2024-09-12 15:26:07,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938582295] [2024-09-12 15:26:07,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:07,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:26:07,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:26:07,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:26:07,396 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:07,543 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2024-09-12 15:26:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:26:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-12 15:26:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:07,544 INFO L225 Difference]: With dead ends: 141 [2024-09-12 15:26:07,544 INFO L226 Difference]: Without dead ends: 112 [2024-09-12 15:26:07,545 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 15:26:07,545 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:07,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-12 15:26:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2024-09-12 15:26:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-12 15:26:07,558 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-12 15:26:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:07,559 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-12 15:26:07,559 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:07,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-12 15:26:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 15:26:07,559 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:07,560 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:07,573 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:07,760 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-12 15:26:07,760 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:07,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2088721174, now seen corresponding path program 6 times [2024-09-12 15:26:07,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:07,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360726980] [2024-09-12 15:26:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:07,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:26:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:26:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:26:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:26:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:26:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:26:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:07,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:07,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360726980] [2024-09-12 15:26:07,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360726980] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:07,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870412194] [2024-09-12 15:26:07,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:07,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:07,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:07,944 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:07,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 15:26:07,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 15:26:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:07,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:26:07,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:08,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:08,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870412194] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:08,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:08,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2024-09-12 15:26:08,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089766142] [2024-09-12 15:26:08,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:08,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-12 15:26:08,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:08,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-12 15:26:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2024-09-12 15:26:08,342 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:08,484 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2024-09-12 15:26:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:26:08,485 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-12 15:26:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:08,486 INFO L225 Difference]: With dead ends: 139 [2024-09-12 15:26:08,486 INFO L226 Difference]: Without dead ends: 110 [2024-09-12 15:26:08,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 117 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:26:08,487 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:08,487 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 201 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-12 15:26:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2024-09-12 15:26:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.15625) internal successors, (74), 65 states have internal predecessors, (74), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2024-09-12 15:26:08,514 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 64 [2024-09-12 15:26:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:08,514 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2024-09-12 15:26:08,514 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:26:08,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2024-09-12 15:26:08,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 15:26:08,515 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:08,515 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:08,531 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-12 15:26:08,715 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 15:26:08,716 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:08,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash -968139999, now seen corresponding path program 12 times [2024-09-12 15:26:08,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:08,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014563902] [2024-09-12 15:26:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:08,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:08,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014563902] [2024-09-12 15:26:08,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014563902] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:08,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182998005] [2024-09-12 15:26:08,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:08,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:08,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:08,848 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:08,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 15:26:08,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 15:26:08,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:08,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:08,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:08,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:26:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182998005] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:09,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:09,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2024-09-12 15:26:09,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338824871] [2024-09-12 15:26:09,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:09,042 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:26:09,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:26:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:26:09,043 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:26:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:09,139 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-09-12 15:26:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:26:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 65 [2024-09-12 15:26:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:09,140 INFO L225 Difference]: With dead ends: 95 [2024-09-12 15:26:09,141 INFO L226 Difference]: Without dead ends: 93 [2024-09-12 15:26:09,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 134 SyntacticMatches, 14 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-12 15:26:09,141 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:09,141 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 175 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-12 15:26:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-09-12 15:26:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.144927536231884) internal successors, (79), 70 states have internal predecessors, (79), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2024-09-12 15:26:09,160 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 65 [2024-09-12 15:26:09,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:09,160 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2024-09-12 15:26:09,160 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 15:26:09,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2024-09-12 15:26:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:09,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:09,161 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:09,173 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:09,361 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 15:26:09,362 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:09,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash -16980201, now seen corresponding path program 13 times [2024-09-12 15:26:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:09,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76597676] [2024-09-12 15:26:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:09,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:09,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76597676] [2024-09-12 15:26:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76597676] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502369171] [2024-09-12 15:26:09,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:09,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:09,621 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:09,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 15:26:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:09,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:09,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:10,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:10,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502369171] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:10,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-12 15:26:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528291597] [2024-09-12 15:26:10,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:10,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 15:26:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 15:26:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 15:26:10,190 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:10,422 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2024-09-12 15:26:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:10,424 INFO L225 Difference]: With dead ends: 153 [2024-09-12 15:26:10,424 INFO L226 Difference]: Without dead ends: 121 [2024-09-12 15:26:10,425 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:26:10,425 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:10,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 308 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-12 15:26:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2024-09-12 15:26:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-12 15:26:10,448 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-12 15:26:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:10,448 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-12 15:26:10,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:10,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-12 15:26:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:10,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:10,451 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:10,467 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:10,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-12 15:26:10,652 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:10,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash 338303382, now seen corresponding path program 16 times [2024-09-12 15:26:10,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:10,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909192758] [2024-09-12 15:26:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:10,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:10,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:10,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909192758] [2024-09-12 15:26:10,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909192758] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:10,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716457085] [2024-09-12 15:26:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:26:10,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:10,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:10,865 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:10,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 15:26:10,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:26:10,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:10,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:10,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:11,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:11,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716457085] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:11,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:11,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2024-09-12 15:26:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056818671] [2024-09-12 15:26:11,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:11,399 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:26:11,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:26:11,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:26:11,400 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:11,570 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2024-09-12 15:26:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:11,571 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:11,572 INFO L225 Difference]: With dead ends: 159 [2024-09-12 15:26:11,572 INFO L226 Difference]: Without dead ends: 127 [2024-09-12 15:26:11,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 15:26:11,573 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:11,573 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 278 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-12 15:26:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-12 15:26:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-12 15:26:11,590 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-12 15:26:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:11,590 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-12 15:26:11,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:11,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-12 15:26:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:11,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:11,591 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:11,603 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:11,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:11,792 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash 626858807, now seen corresponding path program 17 times [2024-09-12 15:26:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:11,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166647629] [2024-09-12 15:26:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:11,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:12,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:12,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166647629] [2024-09-12 15:26:12,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166647629] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:12,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427901110] [2024-09-12 15:26:12,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:12,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:12,046 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 15:26:12,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 15:26:12,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:12,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:12,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:12,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427901110] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:12,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:12,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2024-09-12 15:26:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633391376] [2024-09-12 15:26:12,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:12,613 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 15:26:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:12,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 15:26:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:26:12,614 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:12,761 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2024-09-12 15:26:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:12,762 INFO L225 Difference]: With dead ends: 163 [2024-09-12 15:26:12,762 INFO L226 Difference]: Without dead ends: 131 [2024-09-12 15:26:12,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 127 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:26:12,763 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:12,763 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-12 15:26:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2024-09-12 15:26:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-12 15:26:12,785 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-12 15:26:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:12,785 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-12 15:26:12,785 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:12,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-12 15:26:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:12,786 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:12,786 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:12,799 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-12 15:26:12,986 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 15:26:12,986 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:12,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 81977718, now seen corresponding path program 18 times [2024-09-12 15:26:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:12,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924529453] [2024-09-12 15:26:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:13,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:13,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924529453] [2024-09-12 15:26:13,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924529453] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:13,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051480289] [2024-09-12 15:26:13,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:13,197 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:13,198 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-12 15:26:13,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-12 15:26:13,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:13,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:13,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:13,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:13,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051480289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:13,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:13,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2024-09-12 15:26:13,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152589252] [2024-09-12 15:26:13,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:13,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:26:13,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:13,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:26:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:26:13,767 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:13,980 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2024-09-12 15:26:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:13,981 INFO L225 Difference]: With dead ends: 165 [2024-09-12 15:26:13,981 INFO L226 Difference]: Without dead ends: 133 [2024-09-12 15:26:13,982 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 128 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:26:13,982 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:13,982 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 242 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-12 15:26:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-12 15:26:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-12 15:26:14,007 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-12 15:26:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:14,008 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-12 15:26:14,008 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:14,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-12 15:26:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:14,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:14,009 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:14,022 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:14,209 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 15:26:14,209 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:14,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1736714409, now seen corresponding path program 19 times [2024-09-12 15:26:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:14,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454666696] [2024-09-12 15:26:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:14,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454666696] [2024-09-12 15:26:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454666696] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485310057] [2024-09-12 15:26:14,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:14,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:14,424 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:14,426 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-12 15:26:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:14,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:14,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:14,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:14,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485310057] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:14,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:14,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2024-09-12 15:26:14,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070919614] [2024-09-12 15:26:14,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:14,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 15:26:14,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 15:26:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:26:14,980 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:15,177 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2024-09-12 15:26:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:15,179 INFO L225 Difference]: With dead ends: 165 [2024-09-12 15:26:15,179 INFO L226 Difference]: Without dead ends: 133 [2024-09-12 15:26:15,179 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:26:15,180 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:15,180 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 194 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-12 15:26:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-12 15:26:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-12 15:26:15,206 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-12 15:26:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:15,206 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-12 15:26:15,206 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:15,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-12 15:26:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:15,207 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:15,207 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:15,224 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-12 15:26:15,408 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 15:26:15,408 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:15,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:15,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1391206742, now seen corresponding path program 20 times [2024-09-12 15:26:15,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:15,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708232704] [2024-09-12 15:26:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:15,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:15,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708232704] [2024-09-12 15:26:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708232704] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497915700] [2024-09-12 15:26:15,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:26:15,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:15,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:15,666 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:15,668 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-12 15:26:15,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:26:15,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:15,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:15,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:16,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:16,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497915700] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:16,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:16,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2024-09-12 15:26:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476381788] [2024-09-12 15:26:16,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:16,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:26:16,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:26:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:26:16,224 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:16,448 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2024-09-12 15:26:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:16,450 INFO L225 Difference]: With dead ends: 163 [2024-09-12 15:26:16,450 INFO L226 Difference]: Without dead ends: 131 [2024-09-12 15:26:16,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:26:16,451 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:16,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 262 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-12 15:26:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2024-09-12 15:26:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-12 15:26:16,477 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-12 15:26:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:16,477 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-12 15:26:16,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:16,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-12 15:26:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:16,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:16,478 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:16,494 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:16,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-09-12 15:26:16,683 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:16,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:16,683 INFO L85 PathProgramCache]: Analyzing trace with hash 106634103, now seen corresponding path program 21 times [2024-09-12 15:26:16,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:16,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951864318] [2024-09-12 15:26:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:16,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951864318] [2024-09-12 15:26:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951864318] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:16,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853621932] [2024-09-12 15:26:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:26:16,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:16,895 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:16,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-12 15:26:16,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-12 15:26:16,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:16,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:16,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:17,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:17,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853621932] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:17,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:17,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2024-09-12 15:26:17,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484168464] [2024-09-12 15:26:17,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:17,372 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-12 15:26:17,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-12 15:26:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 15:26:17,373 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:17,540 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2024-09-12 15:26:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:17,542 INFO L225 Difference]: With dead ends: 159 [2024-09-12 15:26:17,542 INFO L226 Difference]: Without dead ends: 127 [2024-09-12 15:26:17,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:26:17,542 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:17,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 234 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-12 15:26:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-12 15:26:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-12 15:26:17,562 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-12 15:26:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:17,562 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-12 15:26:17,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:17,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-12 15:26:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-12 15:26:17,563 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:17,563 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:17,574 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:17,763 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:17,764 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:17,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2013013706, now seen corresponding path program 7 times [2024-09-12 15:26:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:17,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331824608] [2024-09-12 15:26:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:17,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:17,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:26:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:17,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:26:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:17,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:26:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:17,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:26:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:17,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:26:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:18,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:26:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:18,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:26:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:18,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331824608] [2024-09-12 15:26:18,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331824608] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537983076] [2024-09-12 15:26:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:18,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:18,006 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:18,008 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-12 15:26:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:18,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:26:18,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:18,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:18,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537983076] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:18,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:18,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2024-09-12 15:26:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211943048] [2024-09-12 15:26:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:18,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 15:26:18,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 15:26:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:26:18,532 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:18,698 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2024-09-12 15:26:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:26:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-12 15:26:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:18,700 INFO L225 Difference]: With dead ends: 156 [2024-09-12 15:26:18,700 INFO L226 Difference]: Without dead ends: 124 [2024-09-12 15:26:18,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 15:26:18,701 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:18,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 295 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-12 15:26:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2024-09-12 15:26:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 73 states have internal predecessors, (83), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-09-12 15:26:18,724 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 72 [2024-09-12 15:26:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:18,724 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-09-12 15:26:18,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:26:18,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:18,725 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-09-12 15:26:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-12 15:26:18,725 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:18,725 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:18,740 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-12 15:26:18,929 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:18,929 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:18,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 588767362, now seen corresponding path program 14 times [2024-09-12 15:26:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:18,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134026117] [2024-09-12 15:26:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:18,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134026117] [2024-09-12 15:26:19,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134026117] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703819098] [2024-09-12 15:26:19,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:26:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:19,089 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:19,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-12 15:26:19,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:26:19,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:19,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 15:26:19,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:19,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:26:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703819098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:19,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:19,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2024-09-12 15:26:19,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669442852] [2024-09-12 15:26:19,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:19,332 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 15:26:19,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 15:26:19,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-12 15:26:19,333 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:19,430 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2024-09-12 15:26:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:26:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 73 [2024-09-12 15:26:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:19,431 INFO L225 Difference]: With dead ends: 105 [2024-09-12 15:26:19,431 INFO L226 Difference]: Without dead ends: 103 [2024-09-12 15:26:19,432 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 18 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:26:19,432 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:19,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 207 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-12 15:26:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2024-09-12 15:26:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 78 states have internal predecessors, (88), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2024-09-12 15:26:19,460 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 73 [2024-09-12 15:26:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:19,461 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2024-09-12 15:26:19,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 15:26:19,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2024-09-12 15:26:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:19,462 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:19,462 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:19,478 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-12 15:26:19,666 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-12 15:26:19,667 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:19,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1028833942, now seen corresponding path program 15 times [2024-09-12 15:26:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:19,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623303110] [2024-09-12 15:26:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:19,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:19,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:19,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623303110] [2024-09-12 15:26:19,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623303110] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:19,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935284763] [2024-09-12 15:26:19,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:26:19,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:19,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:19,982 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:19,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-12 15:26:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-12 15:26:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:20,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:20,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:20,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:20,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935284763] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:20,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:20,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-09-12 15:26:20,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571961953] [2024-09-12 15:26:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:20,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 15:26:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 15:26:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:26:20,655 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:20,872 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2024-09-12 15:26:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:20,874 INFO L225 Difference]: With dead ends: 170 [2024-09-12 15:26:20,874 INFO L226 Difference]: Without dead ends: 135 [2024-09-12 15:26:20,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 139 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:26:20,875 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:20,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-12 15:26:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2024-09-12 15:26:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:20,904 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:20,905 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:20,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:20,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:20,905 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:20,906 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:20,918 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:21,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-12 15:26:21,106 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:21,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1054800363, now seen corresponding path program 22 times [2024-09-12 15:26:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453499078] [2024-09-12 15:26:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:21,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:21,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453499078] [2024-09-12 15:26:21,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453499078] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:21,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651755199] [2024-09-12 15:26:21,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:26:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:21,332 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:21,333 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-12 15:26:21,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:26:21,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:21,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:21,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:21,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651755199] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:21,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:21,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2024-09-12 15:26:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385135508] [2024-09-12 15:26:21,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:21,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:26:21,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:21,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:26:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:26:21,975 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:22,154 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2024-09-12 15:26:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:22,155 INFO L225 Difference]: With dead ends: 177 [2024-09-12 15:26:22,155 INFO L226 Difference]: Without dead ends: 142 [2024-09-12 15:26:22,156 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:26:22,156 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:22,156 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 258 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-12 15:26:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2024-09-12 15:26:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:22,191 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:22,191 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:22,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:22,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:22,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:22,193 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:22,209 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:22,393 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:22,393 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:22,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1926026934, now seen corresponding path program 23 times [2024-09-12 15:26:22,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:22,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530647512] [2024-09-12 15:26:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:22,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530647512] [2024-09-12 15:26:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530647512] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686082299] [2024-09-12 15:26:22,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:22,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:22,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:22,622 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:22,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-12 15:26:22,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-12 15:26:22,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:22,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:22,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:23,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:23,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686082299] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:23,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:23,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2024-09-12 15:26:23,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568108813] [2024-09-12 15:26:23,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:23,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-12 15:26:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:23,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-12 15:26:23,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:26:23,271 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:23,496 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2024-09-12 15:26:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:23,498 INFO L225 Difference]: With dead ends: 182 [2024-09-12 15:26:23,498 INFO L226 Difference]: Without dead ends: 147 [2024-09-12 15:26:23,499 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:26:23,499 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:23,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 347 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-12 15:26:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 100. [2024-09-12 15:26:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:23,540 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:23,541 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:23,541 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:23,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:23,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:23,542 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:23,558 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-12 15:26:23,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:23,742 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:23,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:23,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1745087989, now seen corresponding path program 24 times [2024-09-12 15:26:23,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:23,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698987247] [2024-09-12 15:26:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:23,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:23,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:23,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698987247] [2024-09-12 15:26:23,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698987247] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:23,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517950876] [2024-09-12 15:26:23,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:23,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:23,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:23,998 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:23,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-12 15:26:24,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-12 15:26:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:24,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:24,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:24,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517950876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:24,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2024-09-12 15:26:24,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777723435] [2024-09-12 15:26:24,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:24,580 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:26:24,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:26:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:26:24,581 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:24,824 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2024-09-12 15:26:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:24,824 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:24,825 INFO L225 Difference]: With dead ends: 185 [2024-09-12 15:26:24,825 INFO L226 Difference]: Without dead ends: 150 [2024-09-12 15:26:24,826 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 142 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:26:24,826 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:24,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 310 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-12 15:26:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2024-09-12 15:26:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:24,855 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:24,855 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:24,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:24,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:24,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:24,856 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:24,867 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-12 15:26:25,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-12 15:26:25,056 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:25,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:25,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1308790058, now seen corresponding path program 25 times [2024-09-12 15:26:25,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:25,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830860337] [2024-09-12 15:26:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:25,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 94 proven. 42 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830860337] [2024-09-12 15:26:25,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830860337] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36582797] [2024-09-12 15:26:25,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:25,326 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:25,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-12 15:26:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:25,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:25,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:25,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:25,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36582797] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:25,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:25,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2024-09-12 15:26:25,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511145953] [2024-09-12 15:26:25,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:25,891 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 15:26:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 15:26:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 15:26:25,892 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:26,135 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2024-09-12 15:26:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:26,136 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:26,137 INFO L225 Difference]: With dead ends: 186 [2024-09-12 15:26:26,137 INFO L226 Difference]: Without dead ends: 151 [2024-09-12 15:26:26,137 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:26:26,137 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:26,138 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-12 15:26:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2024-09-12 15:26:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:26,175 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:26,176 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:26,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:26,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:26,177 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:26,177 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:26,194 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-12 15:26:26,377 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-12 15:26:26,378 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:26,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash 809455061, now seen corresponding path program 26 times [2024-09-12 15:26:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:26,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672453572] [2024-09-12 15:26:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:26,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:26,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672453572] [2024-09-12 15:26:26,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672453572] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:26,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838543240] [2024-09-12 15:26:26,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:26:26,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:26,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:26,592 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:26,593 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-12 15:26:26,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:26:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:26,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:26,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:26,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:27,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838543240] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:27,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:27,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2024-09-12 15:26:27,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672279894] [2024-09-12 15:26:27,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:27,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:26:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:26:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:26:27,172 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:27,425 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2024-09-12 15:26:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:27,426 INFO L225 Difference]: With dead ends: 185 [2024-09-12 15:26:27,426 INFO L226 Difference]: Without dead ends: 150 [2024-09-12 15:26:27,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 144 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 15:26:27,427 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:27,427 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 229 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-12 15:26:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2024-09-12 15:26:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:27,472 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:27,473 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:27,473 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:27,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:27,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:27,475 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:27,492 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-09-12 15:26:27,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-12 15:26:27,676 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:27,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2031708426, now seen corresponding path program 27 times [2024-09-12 15:26:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333718466] [2024-09-12 15:26:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:27,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:27,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333718466] [2024-09-12 15:26:27,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333718466] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:27,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907253056] [2024-09-12 15:26:27,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:26:27,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:27,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:27,942 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:27,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-12 15:26:28,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-12 15:26:28,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:28,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:28,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:28,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:28,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907253056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:28,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:28,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2024-09-12 15:26:28,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114024599] [2024-09-12 15:26:28,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:28,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 15:26:28,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 15:26:28,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:26:28,575 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:28,788 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2024-09-12 15:26:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:28,789 INFO L225 Difference]: With dead ends: 182 [2024-09-12 15:26:28,789 INFO L226 Difference]: Without dead ends: 147 [2024-09-12 15:26:28,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 145 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:26:28,790 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:28,790 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 264 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-12 15:26:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 100. [2024-09-12 15:26:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:28,827 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:28,828 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:28,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:28,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:28,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:28,828 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:28,840 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:29,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-09-12 15:26:29,029 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:29,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 93398453, now seen corresponding path program 28 times [2024-09-12 15:26:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74678294] [2024-09-12 15:26:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:29,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:29,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74678294] [2024-09-12 15:26:29,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74678294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949929208] [2024-09-12 15:26:29,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:26:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:29,241 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:29,242 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-12 15:26:29,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:26:29,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:29,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:29,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:29,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:29,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949929208] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:29,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:29,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2024-09-12 15:26:29,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940961614] [2024-09-12 15:26:29,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:29,762 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:26:29,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:26:29,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:26:29,763 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:29,970 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2024-09-12 15:26:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:29,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:29,972 INFO L225 Difference]: With dead ends: 177 [2024-09-12 15:26:29,972 INFO L226 Difference]: Without dead ends: 142 [2024-09-12 15:26:29,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:26:29,973 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:29,973 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 286 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-12 15:26:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2024-09-12 15:26:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-12 15:26:30,013 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-12 15:26:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:30,014 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-12 15:26:30,014 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:30,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-12 15:26:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 15:26:30,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:30,015 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:30,031 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-09-12 15:26:30,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:30,216 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:30,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1777712362, now seen corresponding path program 8 times [2024-09-12 15:26:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:30,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109088288] [2024-09-12 15:26:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:26:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:26:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:26:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:26:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:26:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:26:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:26:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:26:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:30,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:30,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109088288] [2024-09-12 15:26:30,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109088288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:30,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865540228] [2024-09-12 15:26:30,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:26:30,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:30,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:30,438 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:30,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-12 15:26:30,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:26:30,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:30,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:26:30,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:30,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:30,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865540228] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:30,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:30,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2024-09-12 15:26:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628703754] [2024-09-12 15:26:30,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:30,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 15:26:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 15:26:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:26:30,950 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:31,141 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2024-09-12 15:26:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:26:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-12 15:26:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:31,143 INFO L225 Difference]: With dead ends: 173 [2024-09-12 15:26:31,143 INFO L226 Difference]: Without dead ends: 138 [2024-09-12 15:26:31,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 147 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:26:31,144 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:31,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 257 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-09-12 15:26:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 102. [2024-09-12 15:26:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2024-09-12 15:26:31,184 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 80 [2024-09-12 15:26:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:31,185 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2024-09-12 15:26:31,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:26:31,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2024-09-12 15:26:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-12 15:26:31,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:31,186 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:31,202 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-09-12 15:26:31,386 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:31,387 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:31,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 805249281, now seen corresponding path program 16 times [2024-09-12 15:26:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:31,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356573689] [2024-09-12 15:26:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 52 proven. 109 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356573689] [2024-09-12 15:26:31,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356573689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363465425] [2024-09-12 15:26:31,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:26:31,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:31,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:31,520 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:31,522 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-12 15:26:31,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:26:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:31,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:31,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:31,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-12 15:26:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363465425] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:31,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:31,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 17 [2024-09-12 15:26:31,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900475227] [2024-09-12 15:26:31,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:31,745 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:26:31,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:26:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:26:31,746 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:31,862 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2024-09-12 15:26:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:26:31,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 81 [2024-09-12 15:26:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:31,863 INFO L225 Difference]: With dead ends: 115 [2024-09-12 15:26:31,863 INFO L226 Difference]: Without dead ends: 113 [2024-09-12 15:26:31,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 168 SyntacticMatches, 18 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:26:31,868 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:31,868 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 249 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-12 15:26:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-12 15:26:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 86 states have internal predecessors, (97), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2024-09-12 15:26:31,908 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 81 [2024-09-12 15:26:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:31,908 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2024-09-12 15:26:31,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:26:31,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2024-09-12 15:26:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:31,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:31,909 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:31,926 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:32,110 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:32,110 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:32,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 41469239, now seen corresponding path program 17 times [2024-09-12 15:26:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:32,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592070689] [2024-09-12 15:26:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:32,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592070689] [2024-09-12 15:26:32,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592070689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484618483] [2024-09-12 15:26:32,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:32,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:32,372 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:32,373 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-12 15:26:32,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-12 15:26:32,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:32,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:32,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:32,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:33,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484618483] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:33,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:33,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-12 15:26:33,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489601941] [2024-09-12 15:26:33,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:33,088 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 15:26:33,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:33,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 15:26:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:26:33,089 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:33,289 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2024-09-12 15:26:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:33,291 INFO L225 Difference]: With dead ends: 187 [2024-09-12 15:26:33,291 INFO L226 Difference]: Without dead ends: 149 [2024-09-12 15:26:33,291 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 153 SyntacticMatches, 20 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1991, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:26:33,291 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:33,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 235 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-12 15:26:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2024-09-12 15:26:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:33,327 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:33,327 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:33,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:33,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:33,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:33,328 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:33,344 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:33,529 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:33,529 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:33,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1330059702, now seen corresponding path program 29 times [2024-09-12 15:26:33,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:33,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013049048] [2024-09-12 15:26:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:33,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:33,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:33,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013049048] [2024-09-12 15:26:33,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013049048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:33,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168851678] [2024-09-12 15:26:33,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:33,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:33,780 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:33,781 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-12 15:26:33,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-12 15:26:33,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:33,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:33,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:34,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:34,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168851678] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:34,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:34,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-09-12 15:26:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135761526] [2024-09-12 15:26:34,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:34,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:26:34,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:26:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:26:34,530 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:34,753 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2024-09-12 15:26:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:34,755 INFO L225 Difference]: With dead ends: 195 [2024-09-12 15:26:34,755 INFO L226 Difference]: Without dead ends: 157 [2024-09-12 15:26:34,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 154 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:26:34,756 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:34,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 273 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-12 15:26:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2024-09-12 15:26:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:34,805 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:34,805 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:34,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:34,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:34,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:34,806 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:34,818 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:35,006 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:35,007 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:35,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:35,007 INFO L85 PathProgramCache]: Analyzing trace with hash -13846185, now seen corresponding path program 30 times [2024-09-12 15:26:35,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:35,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559375307] [2024-09-12 15:26:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:35,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:35,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559375307] [2024-09-12 15:26:35,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559375307] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307400886] [2024-09-12 15:26:35,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:35,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:35,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:35,256 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:35,257 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-12 15:26:35,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-12 15:26:35,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:35,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:35,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:35,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307400886] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:35,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:35,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2024-09-12 15:26:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853229662] [2024-09-12 15:26:35,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:35,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-12 15:26:35,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-12 15:26:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 15:26:35,987 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:36,248 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-09-12 15:26:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:36,249 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:36,250 INFO L225 Difference]: With dead ends: 201 [2024-09-12 15:26:36,250 INFO L226 Difference]: Without dead ends: 163 [2024-09-12 15:26:36,250 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 155 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=401, Invalid=1855, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:26:36,250 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:36,250 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 360 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-12 15:26:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2024-09-12 15:26:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:36,286 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:36,287 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:36,287 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:36,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:36,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:36,288 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:36,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-09-12 15:26:36,488 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-09-12 15:26:36,488 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:36,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1882464662, now seen corresponding path program 31 times [2024-09-12 15:26:36,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:36,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466854634] [2024-09-12 15:26:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:36,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:36,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466854634] [2024-09-12 15:26:36,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466854634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623187760] [2024-09-12 15:26:36,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:36,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:36,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:36,770 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:36,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-12 15:26:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:36,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:36,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:37,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:37,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623187760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:37,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:37,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2024-09-12 15:26:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603783774] [2024-09-12 15:26:37,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:37,424 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:26:37,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:26:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:26:37,426 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:37,705 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2024-09-12 15:26:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:37,707 INFO L225 Difference]: With dead ends: 205 [2024-09-12 15:26:37,707 INFO L226 Difference]: Without dead ends: 167 [2024-09-12 15:26:37,707 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 15:26:37,707 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:37,707 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 351 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-12 15:26:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2024-09-12 15:26:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:37,743 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:37,743 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:37,743 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:37,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:37,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:37,744 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:37,755 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-09-12 15:26:37,944 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-12 15:26:37,944 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:37,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:37,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1250899319, now seen corresponding path program 32 times [2024-09-12 15:26:37,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:37,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85453582] [2024-09-12 15:26:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:37,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:38,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85453582] [2024-09-12 15:26:38,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85453582] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974810182] [2024-09-12 15:26:38,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:26:38,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:38,250 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:38,251 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-12 15:26:38,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:26:38,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:38,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:38,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:38,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:38,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974810182] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:38,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:38,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2024-09-12 15:26:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054862641] [2024-09-12 15:26:38,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:38,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 15:26:38,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 15:26:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:26:38,979 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:39,262 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2024-09-12 15:26:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:39,264 INFO L225 Difference]: With dead ends: 207 [2024-09-12 15:26:39,264 INFO L226 Difference]: Without dead ends: 169 [2024-09-12 15:26:39,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 157 SyntacticMatches, 20 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:26:39,265 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:39,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 240 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-12 15:26:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 110. [2024-09-12 15:26:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:39,320 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:39,320 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:39,320 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:39,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:39,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:39,321 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:39,337 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-12 15:26:39,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-12 15:26:39,522 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:39,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:39,522 INFO L85 PathProgramCache]: Analyzing trace with hash -293494410, now seen corresponding path program 33 times [2024-09-12 15:26:39,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:39,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929314627] [2024-09-12 15:26:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:39,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929314627] [2024-09-12 15:26:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929314627] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537999765] [2024-09-12 15:26:39,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:26:39,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:39,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:39,843 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:39,844 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-12 15:26:39,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 15:26:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:39,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:39,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:40,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537999765] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:40,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:40,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2024-09-12 15:26:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732031757] [2024-09-12 15:26:40,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:40,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:26:40,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:26:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:26:40,598 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:40,905 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2024-09-12 15:26:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:40,907 INFO L225 Difference]: With dead ends: 207 [2024-09-12 15:26:40,907 INFO L226 Difference]: Without dead ends: 169 [2024-09-12 15:26:40,908 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 158 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:26:40,908 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:40,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 263 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-12 15:26:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 110. [2024-09-12 15:26:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:40,957 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:40,957 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:40,958 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:40,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:40,958 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:40,958 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:40,958 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:40,970 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:41,159 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-12 15:26:41,159 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:41,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1319254423, now seen corresponding path program 34 times [2024-09-12 15:26:41,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:41,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640395545] [2024-09-12 15:26:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:41,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:41,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640395545] [2024-09-12 15:26:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640395545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491954687] [2024-09-12 15:26:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:26:41,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:41,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:41,404 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:41,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-12 15:26:41,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:26:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:41,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:41,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:41,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491954687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:42,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:42,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2024-09-12 15:26:42,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796599952] [2024-09-12 15:26:42,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:42,018 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-12 15:26:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-12 15:26:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:26:42,018 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:42,273 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2024-09-12 15:26:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:42,274 INFO L225 Difference]: With dead ends: 205 [2024-09-12 15:26:42,274 INFO L226 Difference]: Without dead ends: 167 [2024-09-12 15:26:42,274 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 159 SyntacticMatches, 20 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:26:42,275 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:42,275 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 271 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-12 15:26:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2024-09-12 15:26:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:42,332 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:42,332 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:42,332 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:42,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:42,333 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:42,333 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:42,349 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:42,533 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-12 15:26:42,534 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:42,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 401447254, now seen corresponding path program 35 times [2024-09-12 15:26:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:42,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243457091] [2024-09-12 15:26:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:42,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:42,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243457091] [2024-09-12 15:26:42,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243457091] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:42,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572080749] [2024-09-12 15:26:42,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:42,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:42,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:42,801 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:42,802 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-12 15:26:42,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-12 15:26:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:42,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:42,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:43,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572080749] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:43,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:43,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2024-09-12 15:26:43,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507734449] [2024-09-12 15:26:43,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:43,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:26:43,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:26:43,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:26:43,413 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:43,698 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-09-12 15:26:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:43,699 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:43,700 INFO L225 Difference]: With dead ends: 201 [2024-09-12 15:26:43,700 INFO L226 Difference]: Without dead ends: 163 [2024-09-12 15:26:43,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 20 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:26:43,701 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:43,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-12 15:26:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2024-09-12 15:26:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:43,748 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:43,749 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:43,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:43,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:43,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:43,749 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:43,749 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:43,761 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-09-12 15:26:43,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:43,950 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:43,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash 233293239, now seen corresponding path program 36 times [2024-09-12 15:26:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:43,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409506132] [2024-09-12 15:26:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:44,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409506132] [2024-09-12 15:26:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409506132] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928358992] [2024-09-12 15:26:44,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:44,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:44,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:44,189 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:44,190 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-12 15:26:44,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-12 15:26:44,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:44,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:44,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:44,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:44,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928358992] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:44,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:44,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2024-09-12 15:26:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466240886] [2024-09-12 15:26:44,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:44,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 15:26:44,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 15:26:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 15:26:44,787 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:45,025 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2024-09-12 15:26:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:45,025 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:45,030 INFO L225 Difference]: With dead ends: 195 [2024-09-12 15:26:45,030 INFO L226 Difference]: Without dead ends: 157 [2024-09-12 15:26:45,031 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:26:45,031 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:45,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 226 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-12 15:26:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2024-09-12 15:26:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-12 15:26:45,088 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-12 15:26:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:45,089 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-12 15:26:45,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:45,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-12 15:26:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-12 15:26:45,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:45,090 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:45,107 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:45,290 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:45,291 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:45,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1850341066, now seen corresponding path program 9 times [2024-09-12 15:26:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:45,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114784870] [2024-09-12 15:26:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:45,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:26:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:26:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 15:26:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-12 15:26:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-12 15:26:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:26:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-12 15:26:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:26:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:26:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:45,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:45,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114784870] [2024-09-12 15:26:45,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114784870] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:45,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64997412] [2024-09-12 15:26:45,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:26:45,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:45,543 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:45,544 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-12 15:26:45,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 15:26:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:45,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:26:45,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:45,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:46,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64997412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:46,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:46,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2024-09-12 15:26:46,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813813126] [2024-09-12 15:26:46,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:46,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:26:46,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:26:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:26:46,145 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:46,343 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2024-09-12 15:26:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:26:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-12 15:26:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:46,346 INFO L225 Difference]: With dead ends: 190 [2024-09-12 15:26:46,346 INFO L226 Difference]: Without dead ends: 152 [2024-09-12 15:26:46,347 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 162 SyntacticMatches, 20 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 15:26:46,348 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:46,353 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 159 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-09-12 15:26:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 112. [2024-09-12 15:26:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:26:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2024-09-12 15:26:46,403 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 88 [2024-09-12 15:26:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:46,403 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2024-09-12 15:26:46,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-12 15:26:46,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2024-09-12 15:26:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-12 15:26:46,404 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:46,404 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:46,415 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:46,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-09-12 15:26:46,604 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:46,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1568569182, now seen corresponding path program 18 times [2024-09-12 15:26:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:46,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653911250] [2024-09-12 15:26:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:46,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 63 proven. 136 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:46,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:46,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653911250] [2024-09-12 15:26:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653911250] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171742176] [2024-09-12 15:26:46,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:46,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:46,759 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:46,761 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-12 15:26:46,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-12 15:26:46,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:46,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:46,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:46,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-12 15:26:47,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171742176] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:47,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:47,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2024-09-12 15:26:47,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980150715] [2024-09-12 15:26:47,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:47,012 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 15:26:47,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 15:26:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:26:47,013 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:47,151 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2024-09-12 15:26:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:26:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 89 [2024-09-12 15:26:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:47,152 INFO L225 Difference]: With dead ends: 125 [2024-09-12 15:26:47,152 INFO L226 Difference]: Without dead ends: 123 [2024-09-12 15:26:47,153 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 185 SyntacticMatches, 20 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:26:47,153 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:47,153 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 269 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-12 15:26:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2024-09-12 15:26:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 94 states have internal predecessors, (106), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2024-09-12 15:26:47,213 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 89 [2024-09-12 15:26:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:47,213 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2024-09-12 15:26:47,213 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 15:26:47,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2024-09-12 15:26:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:47,214 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:47,214 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:47,232 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:47,415 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:47,415 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:47,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash 123844214, now seen corresponding path program 19 times [2024-09-12 15:26:47,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:47,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352963613] [2024-09-12 15:26:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:47,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:47,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:47,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352963613] [2024-09-12 15:26:47,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352963613] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769053706] [2024-09-12 15:26:47,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:47,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:47,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:47,709 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:47,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-12 15:26:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:47,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:47,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:48,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:48,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769053706] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:48,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:48,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-09-12 15:26:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146487973] [2024-09-12 15:26:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:48,526 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-12 15:26:48,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-12 15:26:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:26:48,527 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:48,828 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2024-09-12 15:26:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:26:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:26:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:48,829 INFO L225 Difference]: With dead ends: 204 [2024-09-12 15:26:48,829 INFO L226 Difference]: Without dead ends: 163 [2024-09-12 15:26:48,830 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 167 SyntacticMatches, 22 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=535, Invalid=2327, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:26:48,830 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:48,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 296 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-12 15:26:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2024-09-12 15:26:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:26:48,880 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:26:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:48,881 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:26:48,881 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:48,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:26:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:48,881 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:48,881 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:48,893 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-09-12 15:26:49,082 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:49,082 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:49,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1467016203, now seen corresponding path program 37 times [2024-09-12 15:26:49,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:49,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960275953] [2024-09-12 15:26:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:49,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:49,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960275953] [2024-09-12 15:26:49,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960275953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:49,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371106175] [2024-09-12 15:26:49,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:49,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:49,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:49,369 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:49,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-12 15:26:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:49,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:49,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:49,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:50,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371106175] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:50,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:50,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2024-09-12 15:26:50,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091143953] [2024-09-12 15:26:50,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:50,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-12 15:26:50,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-12 15:26:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:26:50,234 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:50,531 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-12 15:26:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:26:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:26:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:50,533 INFO L225 Difference]: With dead ends: 213 [2024-09-12 15:26:50,533 INFO L226 Difference]: Without dead ends: 172 [2024-09-12 15:26:50,533 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 168 SyntacticMatches, 22 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=501, Invalid=2255, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:26:50,534 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:50,534 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-12 15:26:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2024-09-12 15:26:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:26:50,597 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:26:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:50,597 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:26:50,597 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:50,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:26:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:50,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:50,598 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:50,610 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-12 15:26:50,798 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-09-12 15:26:50,799 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:50,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1668254358, now seen corresponding path program 38 times [2024-09-12 15:26:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:50,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955416461] [2024-09-12 15:26:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:50,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:51,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:51,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955416461] [2024-09-12 15:26:51,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955416461] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:51,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672291294] [2024-09-12 15:26:51,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:26:51,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:51,079 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:51,080 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-12 15:26:51,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:26:51,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:51,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:51,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:51,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672291294] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:51,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2024-09-12 15:26:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924710023] [2024-09-12 15:26:51,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:51,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-12 15:26:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-12 15:26:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:26:51,903 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:52,224 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2024-09-12 15:26:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:26:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:26:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:52,226 INFO L225 Difference]: With dead ends: 220 [2024-09-12 15:26:52,226 INFO L226 Difference]: Without dead ends: 179 [2024-09-12 15:26:52,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 169 SyntacticMatches, 22 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:26:52,226 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:52,226 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 269 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:26:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-12 15:26:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2024-09-12 15:26:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:26:52,294 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:26:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:52,294 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:26:52,294 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:52,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:26:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:52,295 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:52,295 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:52,311 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:52,495 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-12 15:26:52,495 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:52,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:52,496 INFO L85 PathProgramCache]: Analyzing trace with hash 661013461, now seen corresponding path program 39 times [2024-09-12 15:26:52,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:52,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526757019] [2024-09-12 15:26:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:52,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526757019] [2024-09-12 15:26:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526757019] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666454038] [2024-09-12 15:26:52,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:26:52,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:52,782 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:52,782 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-12 15:26:52,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-12 15:26:52,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:52,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:52,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:53,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666454038] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:53,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2024-09-12 15:26:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899198871] [2024-09-12 15:26:53,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:53,546 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:26:53,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:26:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:26:53,546 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:53,895 INFO L93 Difference]: Finished difference Result 225 states and 260 transitions. [2024-09-12 15:26:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:26:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:26:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:53,897 INFO L225 Difference]: With dead ends: 225 [2024-09-12 15:26:53,897 INFO L226 Difference]: Without dead ends: 184 [2024-09-12 15:26:53,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:26:53,898 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:53,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-12 15:26:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2024-09-12 15:26:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:26:53,974 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:26:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:53,974 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:26:53,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:53,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:26:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:53,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:53,975 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:53,987 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:54,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-09-12 15:26:54,175 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:54,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -618404170, now seen corresponding path program 40 times [2024-09-12 15:26:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428172143] [2024-09-12 15:26:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:54,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428172143] [2024-09-12 15:26:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428172143] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412104507] [2024-09-12 15:26:54,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:26:54,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:54,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:54,456 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:54,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-12 15:26:54,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:26:54,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:54,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:54,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:54,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412104507] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:55,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:55,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2024-09-12 15:26:55,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127790820] [2024-09-12 15:26:55,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:55,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 15:26:55,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:55,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 15:26:55,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:26:55,196 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:55,606 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2024-09-12 15:26:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:26:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:26:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:55,608 INFO L225 Difference]: With dead ends: 228 [2024-09-12 15:26:55,608 INFO L226 Difference]: Without dead ends: 187 [2024-09-12 15:26:55,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 22 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=423, Invalid=2027, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:26:55,608 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:55,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 436 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-12 15:26:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2024-09-12 15:26:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:26:55,661 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:26:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:55,662 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:26:55,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:55,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:26:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:55,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:55,663 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:55,676 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:55,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-09-12 15:26:55,863 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:55,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1213865035, now seen corresponding path program 41 times [2024-09-12 15:26:55,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:55,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765752178] [2024-09-12 15:26:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 147 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:56,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:56,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765752178] [2024-09-12 15:26:56,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765752178] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:56,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623449696] [2024-09-12 15:26:56,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:26:56,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:56,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:56,152 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:56,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-12 15:26:56,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-12 15:26:56,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:56,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:56,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:56,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:56,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623449696] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:56,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:56,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2024-09-12 15:26:56,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734174429] [2024-09-12 15:26:56,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:56,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:26:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:56,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:26:56,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:26:56,870 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:57,278 INFO L93 Difference]: Finished difference Result 229 states and 264 transitions. [2024-09-12 15:26:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:26:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:26:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:57,280 INFO L225 Difference]: With dead ends: 229 [2024-09-12 15:26:57,280 INFO L226 Difference]: Without dead ends: 188 [2024-09-12 15:26:57,280 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 172 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:26:57,280 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:57,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 456 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-09-12 15:26:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 120. [2024-09-12 15:26:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:26:57,339 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:26:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:57,339 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:26:57,339 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:57,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:26:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:57,340 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:57,340 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:57,352 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-09-12 15:26:57,541 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:57,541 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:57,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1233073450, now seen corresponding path program 42 times [2024-09-12 15:26:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819754498] [2024-09-12 15:26:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:57,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:57,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819754498] [2024-09-12 15:26:57,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819754498] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:57,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678620910] [2024-09-12 15:26:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:26:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:57,815 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:57,816 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-12 15:26:57,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-12 15:26:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:26:57,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:57,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:26:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:58,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:26:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:58,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678620910] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:26:58,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:26:58,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2024-09-12 15:26:58,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020990729] [2024-09-12 15:26:58,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:26:58,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-12 15:26:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:26:58,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-12 15:26:58,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 15:26:58,551 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:26:59,023 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2024-09-12 15:26:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:26:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:26:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:26:59,026 INFO L225 Difference]: With dead ends: 228 [2024-09-12 15:26:59,026 INFO L226 Difference]: Without dead ends: 187 [2024-09-12 15:26:59,026 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 173 SyntacticMatches, 22 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:26:59,027 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:26:59,027 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 447 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:26:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-12 15:26:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2024-09-12 15:26:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:26:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:26:59,111 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:26:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:26:59,111 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:26:59,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:26:59,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:26:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:26:59,112 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:26:59,112 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:26:59,128 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-09-12 15:26:59,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:59,313 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:26:59,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:26:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash 151780245, now seen corresponding path program 43 times [2024-09-12 15:26:59,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:26:59,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464802667] [2024-09-12 15:26:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:26:59,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:26:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:26:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:26:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:26:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:26:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:26:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:26:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:26:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:26:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:26:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:26:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:26:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:26:59,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:26:59,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464802667] [2024-09-12 15:26:59,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464802667] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:26:59,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432652384] [2024-09-12 15:26:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:26:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:26:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:26:59,601 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:26:59,602 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-12 15:26:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:26:59,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:26:59,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:00,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:00,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432652384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:00,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:00,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2024-09-12 15:27:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780214647] [2024-09-12 15:27:00,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:00,286 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:27:00,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:27:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:27:00,287 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:00,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:00,606 INFO L93 Difference]: Finished difference Result 225 states and 260 transitions. [2024-09-12 15:27:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:27:00,606 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:27:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:00,607 INFO L225 Difference]: With dead ends: 225 [2024-09-12 15:27:00,607 INFO L226 Difference]: Without dead ends: 184 [2024-09-12 15:27:00,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 174 SyntacticMatches, 22 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 15:27:00,608 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:00,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 191 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-12 15:27:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2024-09-12 15:27:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:27:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:27:00,667 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:27:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:00,667 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:27:00,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:00,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:27:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:27:00,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:00,668 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:00,680 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-12 15:27:00,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:00,869 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:00,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1443378934, now seen corresponding path program 44 times [2024-09-12 15:27:00,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:00,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612168297] [2024-09-12 15:27:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:00,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:27:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:27:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:27:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:27:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:27:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:27:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:27:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:27:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:27:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:27:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612168297] [2024-09-12 15:27:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612168297] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:01,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431632594] [2024-09-12 15:27:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:27:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:01,143 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:01,144 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-12 15:27:01,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:27:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:01,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:27:01,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:01,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:01,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431632594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:01,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:01,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2024-09-12 15:27:01,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33511914] [2024-09-12 15:27:01,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:01,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-12 15:27:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:01,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-12 15:27:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:27:01,826 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:02,197 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2024-09-12 15:27:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:27:02,198 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:27:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:02,199 INFO L225 Difference]: With dead ends: 220 [2024-09-12 15:27:02,199 INFO L226 Difference]: Without dead ends: 179 [2024-09-12 15:27:02,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 22 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:27:02,200 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:02,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 396 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-12 15:27:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2024-09-12 15:27:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:27:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:27:02,258 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:27:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:02,258 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:27:02,258 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:02,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:27:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:27:02,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:02,259 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:02,271 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:02,459 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:02,460 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:02,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1562997899, now seen corresponding path program 45 times [2024-09-12 15:27:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:02,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530318294] [2024-09-12 15:27:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:27:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:27:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:27:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:27:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:27:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:27:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:27:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:27:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:27:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:27:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530318294] [2024-09-12 15:27:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530318294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:02,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845175053] [2024-09-12 15:27:02,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:27:02,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:02,742 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:02,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-12 15:27:02,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-12 15:27:02,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:02,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:27:02,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:03,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845175053] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:03,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:03,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2024-09-12 15:27:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122563130] [2024-09-12 15:27:03,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:03,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:27:03,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:27:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:27:03,414 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:03,724 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-12 15:27:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:27:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:27:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:03,726 INFO L225 Difference]: With dead ends: 213 [2024-09-12 15:27:03,726 INFO L226 Difference]: Without dead ends: 172 [2024-09-12 15:27:03,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 176 SyntacticMatches, 22 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:27:03,726 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:03,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 361 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-12 15:27:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2024-09-12 15:27:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:27:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-12 15:27:03,786 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-12 15:27:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:03,786 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-12 15:27:03,787 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:03,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-12 15:27:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:27:03,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:03,788 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:03,802 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:03,988 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:03,988 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:03,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1388063510, now seen corresponding path program 10 times [2024-09-12 15:27:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:03,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516940450] [2024-09-12 15:27:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:03,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:27:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:27:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:27:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 15:27:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:27:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-12 15:27:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-12 15:27:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:27:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-12 15:27:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-12 15:27:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:04,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516940450] [2024-09-12 15:27:04,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516940450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293480723] [2024-09-12 15:27:04,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:27:04,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:04,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:04,268 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:04,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-12 15:27:04,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:27:04,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:04,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:27:04,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:04,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:04,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293480723] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:04,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:04,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2024-09-12 15:27:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491478633] [2024-09-12 15:27:04,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:04,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-12 15:27:04,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-12 15:27:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:27:04,979 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:05,263 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2024-09-12 15:27:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:27:05,263 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-12 15:27:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:05,264 INFO L225 Difference]: With dead ends: 207 [2024-09-12 15:27:05,264 INFO L226 Difference]: Without dead ends: 166 [2024-09-12 15:27:05,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 177 SyntacticMatches, 22 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:27:05,265 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:05,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 334 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-12 15:27:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 122. [2024-09-12 15:27:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 97 states have internal predecessors, (110), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:27:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2024-09-12 15:27:05,323 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 96 [2024-09-12 15:27:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:05,324 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2024-09-12 15:27:05,324 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-12 15:27:05,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2024-09-12 15:27:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-12 15:27:05,324 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:05,324 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:05,337 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:05,525 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:05,525 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:05,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 949083873, now seen corresponding path program 20 times [2024-09-12 15:27:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:05,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624459829] [2024-09-12 15:27:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:05,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 75 proven. 166 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:05,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624459829] [2024-09-12 15:27:05,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624459829] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:05,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100496915] [2024-09-12 15:27:05,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:27:05,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:05,697 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:05,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-12 15:27:05,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:27:05,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:05,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-12 15:27:05,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:05,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-12 15:27:05,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100496915] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:05,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:05,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2024-09-12 15:27:05,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273692813] [2024-09-12 15:27:05,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:05,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 15:27:05,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 15:27:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:27:05,986 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:27:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:06,152 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2024-09-12 15:27:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:27:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 97 [2024-09-12 15:27:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:06,154 INFO L225 Difference]: With dead ends: 135 [2024-09-12 15:27:06,154 INFO L226 Difference]: Without dead ends: 133 [2024-09-12 15:27:06,154 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 24 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:27:06,154 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:06,154 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 287 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-12 15:27:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2024-09-12 15:27:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 102 states have internal predecessors, (115), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2024-09-12 15:27:06,239 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 97 [2024-09-12 15:27:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:06,239 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2024-09-12 15:27:06,239 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 15:27:06,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2024-09-12 15:27:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:06,240 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:06,240 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:06,257 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-09-12 15:27:06,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-09-12 15:27:06,441 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:06,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1261524137, now seen corresponding path program 21 times [2024-09-12 15:27:06,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:06,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697254489] [2024-09-12 15:27:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697254489] [2024-09-12 15:27:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697254489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451190903] [2024-09-12 15:27:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:27:06,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:06,797 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:06,814 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-12 15:27:06,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-12 15:27:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:06,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:06,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:07,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:07,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451190903] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:07,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:07,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2024-09-12 15:27:07,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627802026] [2024-09-12 15:27:07,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:07,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 15:27:07,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:07,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 15:27:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:27:07,740 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:08,084 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2024-09-12 15:27:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:08,085 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:08,086 INFO L225 Difference]: With dead ends: 221 [2024-09-12 15:27:08,086 INFO L226 Difference]: Without dead ends: 177 [2024-09-12 15:27:08,086 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 24 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=2689, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:27:08,086 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:08,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 325 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:08,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-12 15:27:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2024-09-12 15:27:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:08,182 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:08,182 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:08,182 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:08,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:08,183 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:08,183 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:08,199 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:08,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-12 15:27:08,388 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:08,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1723474390, now seen corresponding path program 46 times [2024-09-12 15:27:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:08,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176265260] [2024-09-12 15:27:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:08,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:08,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:08,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176265260] [2024-09-12 15:27:08,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176265260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:08,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772146982] [2024-09-12 15:27:08,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:27:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:08,716 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:08,717 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-09-12 15:27:08,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:27:08,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:08,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:08,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:09,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:09,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772146982] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:09,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:09,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2024-09-12 15:27:09,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538049404] [2024-09-12 15:27:09,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:09,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:27:09,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:27:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:27:09,665 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:10,057 INFO L93 Difference]: Finished difference Result 231 states and 269 transitions. [2024-09-12 15:27:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:10,058 INFO L225 Difference]: With dead ends: 231 [2024-09-12 15:27:10,059 INFO L226 Difference]: Without dead ends: 187 [2024-09-12 15:27:10,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 24 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:27:10,059 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:10,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 372 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-12 15:27:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 130. [2024-09-12 15:27:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:10,167 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:10,167 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:10,168 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:10,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:10,169 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:10,169 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:10,186 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:10,369 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:10,370 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:10,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash -396992649, now seen corresponding path program 47 times [2024-09-12 15:27:10,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:10,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677537618] [2024-09-12 15:27:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:10,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:10,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:10,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677537618] [2024-09-12 15:27:10,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677537618] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:10,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453443613] [2024-09-12 15:27:10,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:27:10,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:10,692 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:10,692 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-09-12 15:27:10,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 15:27:10,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:10,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:10,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:11,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:11,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453443613] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:11,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:11,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2024-09-12 15:27:11,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182590911] [2024-09-12 15:27:11,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:11,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-12 15:27:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-12 15:27:11,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 15:27:11,580 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:11,993 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2024-09-12 15:27:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:11,995 INFO L225 Difference]: With dead ends: 239 [2024-09-12 15:27:11,995 INFO L226 Difference]: Without dead ends: 195 [2024-09-12 15:27:11,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 183 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=547, Invalid=2533, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:27:11,996 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:11,996 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 356 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-12 15:27:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2024-09-12 15:27:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:12,101 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:12,101 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:12,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:12,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:12,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:12,103 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:12,119 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:12,303 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:12,303 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:12,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:12,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1197173174, now seen corresponding path program 48 times [2024-09-12 15:27:12,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:12,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282554155] [2024-09-12 15:27:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282554155] [2024-09-12 15:27:12,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282554155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077978620] [2024-09-12 15:27:12,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:27:12,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:12,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:12,718 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:12,719 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-09-12 15:27:12,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-12 15:27:12,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:12,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:12,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:13,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:13,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077978620] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:13,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:13,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2024-09-12 15:27:13,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074748967] [2024-09-12 15:27:13,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:13,690 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 15:27:13,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 15:27:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:27:13,691 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:14,130 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2024-09-12 15:27:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:14,132 INFO L225 Difference]: With dead ends: 245 [2024-09-12 15:27:14,132 INFO L226 Difference]: Without dead ends: 201 [2024-09-12 15:27:14,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 184 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=2452, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 15:27:14,133 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:14,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 277 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-12 15:27:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2024-09-12 15:27:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:14,210 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:14,211 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:14,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:14,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:14,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:14,212 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:14,228 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-09-12 15:27:14,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:14,416 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:14,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1937990761, now seen corresponding path program 49 times [2024-09-12 15:27:14,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:14,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824962075] [2024-09-12 15:27:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:14,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:14,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:14,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824962075] [2024-09-12 15:27:14,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824962075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:14,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135880515] [2024-09-12 15:27:14,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:27:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:14,730 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:14,730 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-09-12 15:27:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:14,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:14,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:15,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:15,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135880515] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:15,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:15,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2024-09-12 15:27:15,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519604291] [2024-09-12 15:27:15,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:15,583 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-12 15:27:15,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-12 15:27:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:27:15,584 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:16,096 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2024-09-12 15:27:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:16,102 INFO L225 Difference]: With dead ends: 249 [2024-09-12 15:27:16,102 INFO L226 Difference]: Without dead ends: 205 [2024-09-12 15:27:16,102 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 185 SyntacticMatches, 24 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:27:16,102 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:16,103 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 333 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-12 15:27:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 130. [2024-09-12 15:27:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:16,185 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:16,185 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:16,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:16,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:16,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:16,186 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:16,198 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2024-09-12 15:27:16,386 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:16,387 INFO L399 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:16,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1701652886, now seen corresponding path program 50 times [2024-09-12 15:27:16,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:16,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753003789] [2024-09-12 15:27:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:16,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:16,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753003789] [2024-09-12 15:27:16,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753003789] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:16,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037326675] [2024-09-12 15:27:16,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:27:16,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:16,702 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:16,703 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-09-12 15:27:16,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:27:16,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:16,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:16,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:17,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:17,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037326675] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:17,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:17,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2024-09-12 15:27:17,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621993837] [2024-09-12 15:27:17,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:17,530 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-12 15:27:17,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-12 15:27:17,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:27:17,530 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:18,007 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2024-09-12 15:27:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:18,009 INFO L225 Difference]: With dead ends: 251 [2024-09-12 15:27:18,009 INFO L226 Difference]: Without dead ends: 207 [2024-09-12 15:27:18,010 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:27:18,010 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:18,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 277 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-12 15:27:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2024-09-12 15:27:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:18,086 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:18,086 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:18,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:18,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:18,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:18,087 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:18,099 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-09-12 15:27:18,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:18,287 INFO L399 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:18,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash -951885897, now seen corresponding path program 51 times [2024-09-12 15:27:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:18,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449125866] [2024-09-12 15:27:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:18,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:18,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449125866] [2024-09-12 15:27:18,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449125866] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460958966] [2024-09-12 15:27:18,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:27:18,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:18,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:18,606 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:18,606 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-09-12 15:27:18,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-12 15:27:18,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:18,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:18,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:19,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:19,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460958966] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:19,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:19,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2024-09-12 15:27:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658613667] [2024-09-12 15:27:19,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:19,411 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-12 15:27:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-12 15:27:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:27:19,412 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:19,876 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2024-09-12 15:27:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:19,876 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:19,877 INFO L225 Difference]: With dead ends: 251 [2024-09-12 15:27:19,877 INFO L226 Difference]: Without dead ends: 207 [2024-09-12 15:27:19,878 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 187 SyntacticMatches, 24 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=455, Invalid=2197, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:27:19,878 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:19,878 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 267 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-12 15:27:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2024-09-12 15:27:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:19,960 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:19,960 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:19,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:19,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:19,961 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:19,961 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:19,977 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:20,161 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:20,162 INFO L399 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:20,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash -760389258, now seen corresponding path program 52 times [2024-09-12 15:27:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:20,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257421187] [2024-09-12 15:27:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:20,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:20,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:20,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257421187] [2024-09-12 15:27:20,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257421187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:20,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224337456] [2024-09-12 15:27:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:27:20,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:20,482 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:20,484 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-09-12 15:27:20,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:27:20,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:20,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:20,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:21,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:21,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224337456] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:21,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:21,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2024-09-12 15:27:21,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833149499] [2024-09-12 15:27:21,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:21,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:27:21,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:21,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:27:21,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:27:21,316 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:21,855 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2024-09-12 15:27:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:21,856 INFO L225 Difference]: With dead ends: 249 [2024-09-12 15:27:21,856 INFO L226 Difference]: Without dead ends: 205 [2024-09-12 15:27:21,857 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 188 SyntacticMatches, 24 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:27:21,857 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:21,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 354 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-12 15:27:21,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 130. [2024-09-12 15:27:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:21,939 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:21,939 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:21,939 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:21,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:21,939 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:21,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:21,940 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:21,952 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-09-12 15:27:22,140 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:22,141 INFO L399 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:22,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1462545367, now seen corresponding path program 53 times [2024-09-12 15:27:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689068372] [2024-09-12 15:27:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:22,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:22,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689068372] [2024-09-12 15:27:22,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689068372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250045751] [2024-09-12 15:27:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:27:22,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:22,460 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:22,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-09-12 15:27:22,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 15:27:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:22,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:22,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:22,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:23,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250045751] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:23,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:23,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2024-09-12 15:27:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691409611] [2024-09-12 15:27:23,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:23,240 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 15:27:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 15:27:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:27:23,241 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:23,724 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2024-09-12 15:27:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:23,726 INFO L225 Difference]: With dead ends: 245 [2024-09-12 15:27:23,726 INFO L226 Difference]: Without dead ends: 201 [2024-09-12 15:27:23,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 189 SyntacticMatches, 24 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:27:23,727 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:23,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 395 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-12 15:27:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2024-09-12 15:27:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:23,808 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:23,808 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:23,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:23,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:23,809 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:23,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:23,809 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:23,821 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-09-12 15:27:24,010 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:24,010 INFO L399 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:24,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:24,010 INFO L85 PathProgramCache]: Analyzing trace with hash -128315050, now seen corresponding path program 54 times [2024-09-12 15:27:24,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:24,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713445380] [2024-09-12 15:27:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:24,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:24,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:24,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713445380] [2024-09-12 15:27:24,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713445380] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:24,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745276496] [2024-09-12 15:27:24,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:27:24,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:24,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:24,339 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-09-12 15:27:24,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-12 15:27:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:24,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:24,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:24,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745276496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:25,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2024-09-12 15:27:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775306721] [2024-09-12 15:27:25,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:25,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:27:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:27:25,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:27:25,117 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:25,728 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2024-09-12 15:27:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:25,729 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:25,730 INFO L225 Difference]: With dead ends: 239 [2024-09-12 15:27:25,730 INFO L226 Difference]: Without dead ends: 195 [2024-09-12 15:27:25,731 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 24 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:27:25,731 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:25,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 279 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-12 15:27:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2024-09-12 15:27:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:25,854 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:25,854 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:25,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:25,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:25,855 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:25,855 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:25,873 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:26,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-09-12 15:27:26,056 INFO L399 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:26,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1288011785, now seen corresponding path program 55 times [2024-09-12 15:27:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735539705] [2024-09-12 15:27:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735539705] [2024-09-12 15:27:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735539705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519049773] [2024-09-12 15:27:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:27:26,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:26,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:26,400 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:26,401 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-09-12 15:27:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:26,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:26,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:26,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519049773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:27,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:27,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2024-09-12 15:27:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17327778] [2024-09-12 15:27:27,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:27,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-12 15:27:27,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-12 15:27:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 15:27:27,183 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:27,549 INFO L93 Difference]: Finished difference Result 231 states and 269 transitions. [2024-09-12 15:27:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:27,551 INFO L225 Difference]: With dead ends: 231 [2024-09-12 15:27:27,551 INFO L226 Difference]: Without dead ends: 187 [2024-09-12 15:27:27,552 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 191 SyntacticMatches, 24 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=427, Invalid=1829, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:27:27,552 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:27,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 256 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-12 15:27:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 130. [2024-09-12 15:27:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-12 15:27:27,637 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-12 15:27:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:27,637 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-12 15:27:27,637 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:27,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-12 15:27:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:27:27,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:27,638 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:27,649 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:27,838 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-09-12 15:27:27,839 INFO L399 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:27,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:27,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1999714614, now seen corresponding path program 11 times [2024-09-12 15:27:27,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:27,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166027337] [2024-09-12 15:27:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:27:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:27:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 15:27:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 15:27:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:27:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 15:27:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:27:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:27:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 15:27:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 15:27:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 15:27:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:28,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:28,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166027337] [2024-09-12 15:27:28,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166027337] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:28,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616556176] [2024-09-12 15:27:28,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:27:28,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:28,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:28,162 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:28,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-09-12 15:27:28,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 15:27:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:28,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:27:28,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:28,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:28,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616556176] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:28,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:28,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2024-09-12 15:27:28,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965874081] [2024-09-12 15:27:28,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:28,897 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:27:28,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:27:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:27:28,897 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:29,291 INFO L93 Difference]: Finished difference Result 224 states and 263 transitions. [2024-09-12 15:27:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:27:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-12 15:27:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:29,293 INFO L225 Difference]: With dead ends: 224 [2024-09-12 15:27:29,293 INFO L226 Difference]: Without dead ends: 180 [2024-09-12 15:27:29,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 192 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=430, Invalid=1732, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 15:27:29,293 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:29,293 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 518 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-12 15:27:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 132. [2024-09-12 15:27:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 105 states have internal predecessors, (119), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:27:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2024-09-12 15:27:29,384 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 104 [2024-09-12 15:27:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:29,384 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2024-09-12 15:27:29,385 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-12 15:27:29,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2024-09-12 15:27:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-12 15:27:29,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:29,385 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:29,399 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-09-12 15:27:29,586 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:29,586 INFO L399 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:29,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1609644226, now seen corresponding path program 22 times [2024-09-12 15:27:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:29,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783630135] [2024-09-12 15:27:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:29,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 88 proven. 199 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:29,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:29,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783630135] [2024-09-12 15:27:29,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783630135] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:29,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004987906] [2024-09-12 15:27:29,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:27:29,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:29,777 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:29,777 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-09-12 15:27:29,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:27:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:29,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:29,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:29,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-12 15:27:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004987906] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:30,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:30,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2024-09-12 15:27:30,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410568764] [2024-09-12 15:27:30,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:30,087 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:27:30,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:27:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:27:30,087 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:27:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:30,267 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2024-09-12 15:27:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:27:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 105 [2024-09-12 15:27:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:30,269 INFO L225 Difference]: With dead ends: 145 [2024-09-12 15:27:30,269 INFO L226 Difference]: Without dead ends: 143 [2024-09-12 15:27:30,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 24 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:27:30,269 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:30,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 245 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-12 15:27:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2024-09-12 15:27:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 110 states have internal predecessors, (124), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2024-09-12 15:27:30,354 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 105 [2024-09-12 15:27:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:30,355 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2024-09-12 15:27:30,355 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:27:30,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2024-09-12 15:27:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:30,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:30,356 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:30,367 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-09-12 15:27:30,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:30,556 INFO L399 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:30,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -367943082, now seen corresponding path program 23 times [2024-09-12 15:27:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:30,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068935163] [2024-09-12 15:27:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068935163] [2024-09-12 15:27:30,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068935163] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429788373] [2024-09-12 15:27:30,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:27:30,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:30,930 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:30,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-09-12 15:27:30,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-12 15:27:30,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:30,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:30,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:31,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429788373] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:31,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:31,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2024-09-12 15:27:31,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250007947] [2024-09-12 15:27:31,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:31,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-12 15:27:31,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-12 15:27:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:27:31,962 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:32,363 INFO L93 Difference]: Finished difference Result 238 states and 279 transitions. [2024-09-12 15:27:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:32,365 INFO L225 Difference]: With dead ends: 238 [2024-09-12 15:27:32,365 INFO L226 Difference]: Without dead ends: 191 [2024-09-12 15:27:32,366 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 195 SyntacticMatches, 26 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=3077, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:27:32,366 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:32,366 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 406 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-12 15:27:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 140. [2024-09-12 15:27:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:32,479 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:32,479 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:32,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:32,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:32,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:32,480 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:32,492 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2024-09-12 15:27:32,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:32,681 INFO L399 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:32,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:32,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1709561387, now seen corresponding path program 56 times [2024-09-12 15:27:32,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:32,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822699] [2024-09-12 15:27:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:32,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:33,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:33,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822699] [2024-09-12 15:27:33,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822699] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:33,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806408052] [2024-09-12 15:27:33,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:27:33,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:33,064 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:33,065 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-09-12 15:27:33,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:27:33,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:33,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:33,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:33,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:34,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806408052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:34,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:34,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2024-09-12 15:27:34,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577616629] [2024-09-12 15:27:34,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:34,086 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-12 15:27:34,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-12 15:27:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:27:34,087 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:34,556 INFO L93 Difference]: Finished difference Result 249 states and 290 transitions. [2024-09-12 15:27:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:34,556 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:34,558 INFO L225 Difference]: With dead ends: 249 [2024-09-12 15:27:34,558 INFO L226 Difference]: Without dead ends: 202 [2024-09-12 15:27:34,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 196 SyntacticMatches, 26 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=2995, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:27:34,558 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:34,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-12 15:27:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 140. [2024-09-12 15:27:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:34,661 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:34,661 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:34,661 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:34,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:34,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:34,662 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:34,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:34,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:34,863 INFO L399 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:34,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1295201910, now seen corresponding path program 57 times [2024-09-12 15:27:34,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:34,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645293657] [2024-09-12 15:27:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:34,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:35,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:35,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645293657] [2024-09-12 15:27:35,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645293657] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:35,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866723999] [2024-09-12 15:27:35,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:27:35,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:35,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:35,235 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:35,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-09-12 15:27:35,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-12 15:27:35,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:35,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:35,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:35,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:36,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866723999] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:36,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:36,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2024-09-12 15:27:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095929943] [2024-09-12 15:27:36,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:36,226 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-12 15:27:36,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:36,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-12 15:27:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:27:36,227 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:36,778 INFO L93 Difference]: Finished difference Result 258 states and 299 transitions. [2024-09-12 15:27:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:36,779 INFO L225 Difference]: With dead ends: 258 [2024-09-12 15:27:36,779 INFO L226 Difference]: Without dead ends: 211 [2024-09-12 15:27:36,780 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 197 SyntacticMatches, 26 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:27:36,780 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:36,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 394 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-12 15:27:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2024-09-12 15:27:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:36,892 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:36,892 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:36,892 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:36,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:36,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:36,893 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:36,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-09-12 15:27:37,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:37,093 INFO L399 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:37,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash 6656437, now seen corresponding path program 58 times [2024-09-12 15:27:37,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:37,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870987151] [2024-09-12 15:27:37,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:37,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:37,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870987151] [2024-09-12 15:27:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870987151] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:37,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406994979] [2024-09-12 15:27:37,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:27:37,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:37,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:37,486 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:37,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-09-12 15:27:37,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:27:37,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:37,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:37,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:38,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:38,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406994979] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:38,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:38,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2024-09-12 15:27:38,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898090770] [2024-09-12 15:27:38,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:38,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-12 15:27:38,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-12 15:27:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:27:38,477 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:39,286 INFO L93 Difference]: Finished difference Result 265 states and 306 transitions. [2024-09-12 15:27:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:39,288 INFO L225 Difference]: With dead ends: 265 [2024-09-12 15:27:39,288 INFO L226 Difference]: Without dead ends: 218 [2024-09-12 15:27:39,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 198 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=597, Invalid=2825, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:27:39,289 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:39,289 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 350 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-12 15:27:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2024-09-12 15:27:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:39,395 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:39,395 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:39,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:39,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:39,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:39,396 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:39,413 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:39,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:39,597 INFO L399 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:39,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:39,597 INFO L85 PathProgramCache]: Analyzing trace with hash -34909546, now seen corresponding path program 59 times [2024-09-12 15:27:39,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:39,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700212420] [2024-09-12 15:27:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:39,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700212420] [2024-09-12 15:27:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700212420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313952725] [2024-09-12 15:27:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:27:39,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:39,954 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:39,955 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-09-12 15:27:40,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-12 15:27:40,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:40,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:40,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:40,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313952725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:40,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:40,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2024-09-12 15:27:40,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227410167] [2024-09-12 15:27:40,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:40,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 15:27:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 15:27:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:27:40,902 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:41,526 INFO L93 Difference]: Finished difference Result 270 states and 311 transitions. [2024-09-12 15:27:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:41,528 INFO L225 Difference]: With dead ends: 270 [2024-09-12 15:27:41,528 INFO L226 Difference]: Without dead ends: 223 [2024-09-12 15:27:41,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 199 SyntacticMatches, 26 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=569, Invalid=2737, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:27:41,529 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:41,529 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 307 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-12 15:27:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 140. [2024-09-12 15:27:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:41,639 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:41,639 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:41,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:41,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:41,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:41,640 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:41,657 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:41,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:41,841 INFO L399 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:41,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1210675605, now seen corresponding path program 60 times [2024-09-12 15:27:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:41,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588060722] [2024-09-12 15:27:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:41,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:42,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:42,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588060722] [2024-09-12 15:27:42,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588060722] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:42,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269562271] [2024-09-12 15:27:42,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:27:42,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:42,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:42,205 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:42,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-09-12 15:27:42,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-12 15:27:42,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:42,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:42,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:42,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269562271] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:43,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2024-09-12 15:27:43,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728482682] [2024-09-12 15:27:43,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:43,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:27:43,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:27:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:27:43,229 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:43,882 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-09-12 15:27:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:43,884 INFO L225 Difference]: With dead ends: 273 [2024-09-12 15:27:43,884 INFO L226 Difference]: Without dead ends: 226 [2024-09-12 15:27:43,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 200 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=2647, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:27:43,885 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:43,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 346 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-12 15:27:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 140. [2024-09-12 15:27:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:44,014 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:44,014 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:44,014 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:44,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:44,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:44,015 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:44,026 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2024-09-12 15:27:44,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:44,215 INFO L399 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:44,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash 3929782, now seen corresponding path program 61 times [2024-09-12 15:27:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241188471] [2024-09-12 15:27:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 212 proven. 76 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241188471] [2024-09-12 15:27:44,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241188471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:44,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576179476] [2024-09-12 15:27:44,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:27:44,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:44,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:44,582 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:44,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-09-12 15:27:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:44,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:44,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:45,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576179476] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:45,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:45,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2024-09-12 15:27:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98540699] [2024-09-12 15:27:45,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:45,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-12 15:27:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-12 15:27:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 15:27:45,571 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:46,225 INFO L93 Difference]: Finished difference Result 274 states and 315 transitions. [2024-09-12 15:27:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:46,227 INFO L225 Difference]: With dead ends: 274 [2024-09-12 15:27:46,227 INFO L226 Difference]: Without dead ends: 227 [2024-09-12 15:27:46,227 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 201 SyntacticMatches, 26 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=525, Invalid=2555, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:27:46,227 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:46,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-12 15:27:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 140. [2024-09-12 15:27:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:46,344 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:46,344 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:46,344 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:46,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:46,344 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:46,345 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:46,356 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:46,545 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2024-09-12 15:27:46,545 INFO L399 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:46,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash -450639499, now seen corresponding path program 62 times [2024-09-12 15:27:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:46,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858771164] [2024-09-12 15:27:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:46,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:46,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:47,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858771164] [2024-09-12 15:27:47,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858771164] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:47,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910550123] [2024-09-12 15:27:47,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:27:47,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:47,018 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:47,018 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-09-12 15:27:47,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:27:47,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:47,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:47,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:47,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:47,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910550123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:47,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:47,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2024-09-12 15:27:47,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058665989] [2024-09-12 15:27:47,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:47,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 15:27:47,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:47,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 15:27:47,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:27:47,923 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:48,634 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-09-12 15:27:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:48,634 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:48,636 INFO L225 Difference]: With dead ends: 273 [2024-09-12 15:27:48,636 INFO L226 Difference]: Without dead ends: 226 [2024-09-12 15:27:48,636 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 202 SyntacticMatches, 26 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=509, Invalid=2461, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 15:27:48,636 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:48,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 475 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-12 15:27:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 140. [2024-09-12 15:27:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:48,754 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:48,754 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:48,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:48,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:48,754 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:48,766 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-09-12 15:27:48,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2024-09-12 15:27:48,955 INFO L399 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:48,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1890001622, now seen corresponding path program 63 times [2024-09-12 15:27:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:48,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354998433] [2024-09-12 15:27:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:49,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:49,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354998433] [2024-09-12 15:27:49,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354998433] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:49,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591376992] [2024-09-12 15:27:49,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:27:49,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:49,307 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:49,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-09-12 15:27:49,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-12 15:27:49,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:49,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:49,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:49,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591376992] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:50,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:50,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2024-09-12 15:27:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719591642] [2024-09-12 15:27:50,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:50,196 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-12 15:27:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-12 15:27:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:27:50,197 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:50,857 INFO L93 Difference]: Finished difference Result 270 states and 311 transitions. [2024-09-12 15:27:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:50,859 INFO L225 Difference]: With dead ends: 270 [2024-09-12 15:27:50,859 INFO L226 Difference]: Without dead ends: 223 [2024-09-12 15:27:50,859 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 203 SyntacticMatches, 26 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:27:50,859 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:50,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 358 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-12 15:27:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 140. [2024-09-12 15:27:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:50,986 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:50,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:50,986 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:50,986 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:50,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:50,986 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:50,987 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:50,998 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2024-09-12 15:27:51,187 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:51,187 INFO L399 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:51,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:51,187 INFO L85 PathProgramCache]: Analyzing trace with hash 580032853, now seen corresponding path program 64 times [2024-09-12 15:27:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:51,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732371692] [2024-09-12 15:27:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:51,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:51,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:51,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732371692] [2024-09-12 15:27:51,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732371692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:51,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230775069] [2024-09-12 15:27:51,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:27:51,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:51,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:51,593 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:51,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-09-12 15:27:51,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:27:51,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:51,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:51,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:52,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:52,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230775069] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:52,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:52,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2024-09-12 15:27:52,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939036751] [2024-09-12 15:27:52,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:52,460 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-12 15:27:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-12 15:27:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:27:52,461 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:53,060 INFO L93 Difference]: Finished difference Result 265 states and 306 transitions. [2024-09-12 15:27:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:53,060 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:53,062 INFO L225 Difference]: With dead ends: 265 [2024-09-12 15:27:53,062 INFO L226 Difference]: Without dead ends: 218 [2024-09-12 15:27:53,062 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 204 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:27:53,062 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:53,063 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 279 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-12 15:27:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2024-09-12 15:27:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:53,178 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:53,178 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:53,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:53,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:53,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:53,179 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:53,190 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2024-09-12 15:27:53,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-09-12 15:27:53,380 INFO L399 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:53,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1540434186, now seen corresponding path program 65 times [2024-09-12 15:27:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:53,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572009133] [2024-09-12 15:27:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:53,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572009133] [2024-09-12 15:27:53,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572009133] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:53,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896485212] [2024-09-12 15:27:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:27:53,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:53,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:53,745 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:53,746 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-09-12 15:27:53,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-12 15:27:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:53,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:53,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:54,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:54,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896485212] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:54,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:54,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2024-09-12 15:27:54,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128617983] [2024-09-12 15:27:54,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:54,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-12 15:27:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:54,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-12 15:27:54,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:27:54,594 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:55,167 INFO L93 Difference]: Finished difference Result 258 states and 299 transitions. [2024-09-12 15:27:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:55,169 INFO L225 Difference]: With dead ends: 258 [2024-09-12 15:27:55,169 INFO L226 Difference]: Without dead ends: 211 [2024-09-12 15:27:55,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 205 SyntacticMatches, 26 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=2167, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:27:55,170 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:55,170 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 299 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-12 15:27:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2024-09-12 15:27:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:55,296 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:55,296 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:55,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:55,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:55,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:55,297 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:55,309 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2024-09-12 15:27:55,497 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-09-12 15:27:55,498 INFO L399 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:55,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash 53731637, now seen corresponding path program 66 times [2024-09-12 15:27:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:55,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531323368] [2024-09-12 15:27:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531323368] [2024-09-12 15:27:55,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531323368] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557008578] [2024-09-12 15:27:55,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:27:55,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:55,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:55,857 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:55,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-09-12 15:27:55,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-12 15:27:55,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:55,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:55,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:56,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:56,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557008578] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:56,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:56,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2024-09-12 15:27:56,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393737660] [2024-09-12 15:27:56,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:56,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:27:56,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:27:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:27:56,697 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:57,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:57,186 INFO L93 Difference]: Finished difference Result 249 states and 290 transitions. [2024-09-12 15:27:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:57,188 INFO L225 Difference]: With dead ends: 249 [2024-09-12 15:27:57,188 INFO L226 Difference]: Without dead ends: 202 [2024-09-12 15:27:57,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 206 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:27:57,189 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:57,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 306 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:27:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-12 15:27:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 140. [2024-09-12 15:27:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-12 15:27:57,304 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-12 15:27:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:57,305 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-12 15:27:57,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:57,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-12 15:27:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-12 15:27:57,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:57,306 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:57,322 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-09-12 15:27:57,506 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-09-12 15:27:57,507 INFO L399 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:57,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1213534998, now seen corresponding path program 12 times [2024-09-12 15:27:57,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:57,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545642284] [2024-09-12 15:27:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:57,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:27:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:27:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 15:27:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:27:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-12 15:27:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-12 15:27:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:27:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-12 15:27:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:27:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:27:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:27:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-12 15:27:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:57,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545642284] [2024-09-12 15:27:57,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545642284] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:57,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098171555] [2024-09-12 15:27:57,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:27:57,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:57,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:57,869 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:57,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-09-12 15:27:57,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-12 15:27:57,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:57,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:27:57,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:58,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:27:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:58,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098171555] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:27:58,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:27:58,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2024-09-12 15:27:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786669105] [2024-09-12 15:27:58,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:27:58,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 15:27:58,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:27:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 15:27:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 15:27:58,730 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:27:59,141 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2024-09-12 15:27:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:27:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-12 15:27:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:27:59,143 INFO L225 Difference]: With dead ends: 241 [2024-09-12 15:27:59,143 INFO L226 Difference]: Without dead ends: 194 [2024-09-12 15:27:59,144 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 207 SyntacticMatches, 26 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:27:59,144 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:27:59,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 252 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:27:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-12 15:27:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 142. [2024-09-12 15:27:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 113 states have internal predecessors, (128), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:27:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2024-09-12 15:27:59,263 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 112 [2024-09-12 15:27:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:27:59,263 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2024-09-12 15:27:59,264 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-12 15:27:59,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2024-09-12 15:27:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-12 15:27:59,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:27:59,264 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:27:59,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-09-12 15:27:59,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-09-12 15:27:59,465 INFO L399 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:27:59,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:27:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash -51276607, now seen corresponding path program 24 times [2024-09-12 15:27:59,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:27:59,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124015205] [2024-09-12 15:27:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:27:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:27:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:27:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:27:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:27:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:27:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:27:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:27:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:27:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:27:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:27:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:27:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:27:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:27:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:27:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:27:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 102 proven. 235 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:59,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:27:59,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124015205] [2024-09-12 15:27:59,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124015205] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:27:59,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547767140] [2024-09-12 15:27:59,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:27:59,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:27:59,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:27:59,687 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:27:59,688 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-09-12 15:27:59,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-12 15:27:59,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:27:59,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:27:59,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:27:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:27:59,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-12 15:28:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547767140] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:00,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:00,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2024-09-12 15:28:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625425922] [2024-09-12 15:28:00,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:00,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:28:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:28:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:28:00,021 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:28:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:00,263 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2024-09-12 15:28:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:28:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 113 [2024-09-12 15:28:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:00,264 INFO L225 Difference]: With dead ends: 155 [2024-09-12 15:28:00,264 INFO L226 Difference]: Without dead ends: 153 [2024-09-12 15:28:00,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 236 SyntacticMatches, 26 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2024-09-12 15:28:00,265 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:00,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 329 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:28:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-12 15:28:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2024-09-12 15:28:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 118 states have internal predecessors, (133), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2024-09-12 15:28:00,379 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 113 [2024-09-12 15:28:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:00,379 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2024-09-12 15:28:00,379 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 15:28:00,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2024-09-12 15:28:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:00,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:00,380 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:00,392 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:00,580 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-09-12 15:28:00,580 INFO L399 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:00,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash 827365751, now seen corresponding path program 25 times [2024-09-12 15:28:00,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:00,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913828002] [2024-09-12 15:28:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:00,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913828002] [2024-09-12 15:28:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913828002] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036905729] [2024-09-12 15:28:00,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:28:00,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:01,000 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:01,002 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-09-12 15:28:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:01,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:01,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:01,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:02,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036905729] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:02,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:02,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-09-12 15:28:02,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335044559] [2024-09-12 15:28:02,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:02,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-12 15:28:02,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-12 15:28:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 15:28:02,170 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:02,605 INFO L93 Difference]: Finished difference Result 255 states and 299 transitions. [2024-09-12 15:28:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:02,606 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:02,607 INFO L225 Difference]: With dead ends: 255 [2024-09-12 15:28:02,607 INFO L226 Difference]: Without dead ends: 205 [2024-09-12 15:28:02,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 209 SyntacticMatches, 28 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2024-09-12 15:28:02,608 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:02,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-12 15:28:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2024-09-12 15:28:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:02,734 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:02,734 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:02,735 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:02,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:02,735 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:02,735 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:02,747 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:02,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:02,936 INFO L399 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:02,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash -36359690, now seen corresponding path program 67 times [2024-09-12 15:28:02,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:02,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438092396] [2024-09-12 15:28:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:02,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:03,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:03,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438092396] [2024-09-12 15:28:03,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438092396] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:03,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133447691] [2024-09-12 15:28:03,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:28:03,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:03,357 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-09-12 15:28:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:03,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:03,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:04,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:04,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133447691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:04,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:04,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2024-09-12 15:28:04,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611894661] [2024-09-12 15:28:04,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:04,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-12 15:28:04,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-12 15:28:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2024-09-12 15:28:04,479 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:05,113 INFO L93 Difference]: Finished difference Result 267 states and 311 transitions. [2024-09-12 15:28:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:05,115 INFO L225 Difference]: With dead ends: 267 [2024-09-12 15:28:05,115 INFO L226 Difference]: Without dead ends: 217 [2024-09-12 15:28:05,115 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 210 SyntacticMatches, 28 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=756, Invalid=3404, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 15:28:05,116 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:05,116 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 485 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-12 15:28:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 150. [2024-09-12 15:28:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:05,254 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:05,254 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:05,254 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:05,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:05,255 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:05,255 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:05,267 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:05,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-09-12 15:28:05,455 INFO L399 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:05,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash -64221801, now seen corresponding path program 68 times [2024-09-12 15:28:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763017236] [2024-09-12 15:28:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:05,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:05,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763017236] [2024-09-12 15:28:05,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763017236] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:05,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360034671] [2024-09-12 15:28:05,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:28:05,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:05,865 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:05,866 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-09-12 15:28:05,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:28:05,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:05,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:05,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:06,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360034671] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:06,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:06,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2024-09-12 15:28:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061011852] [2024-09-12 15:28:06,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:06,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-12 15:28:06,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-12 15:28:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 15:28:06,967 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:07,670 INFO L93 Difference]: Finished difference Result 277 states and 321 transitions. [2024-09-12 15:28:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:07,672 INFO L225 Difference]: With dead ends: 277 [2024-09-12 15:28:07,672 INFO L226 Difference]: Without dead ends: 227 [2024-09-12 15:28:07,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 211 SyntacticMatches, 28 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=717, Invalid=3315, Unknown=0, NotChecked=0, Total=4032 [2024-09-12 15:28:07,673 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:07,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 388 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-12 15:28:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 150. [2024-09-12 15:28:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:07,815 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:07,815 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:07,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:07,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:07,816 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:07,816 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:07,828 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:08,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:08,017 INFO L399 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:08,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:08,017 INFO L85 PathProgramCache]: Analyzing trace with hash 766163414, now seen corresponding path program 69 times [2024-09-12 15:28:08,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:08,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494699864] [2024-09-12 15:28:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:08,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:08,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494699864] [2024-09-12 15:28:08,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494699864] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440732732] [2024-09-12 15:28:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:28:08,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:08,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:08,425 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:08,425 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-09-12 15:28:08,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-12 15:28:08,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:08,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:08,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:09,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:09,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440732732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:09,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:09,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2024-09-12 15:28:09,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378651973] [2024-09-12 15:28:09,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:09,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-12 15:28:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-12 15:28:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:28:09,500 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:10,351 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2024-09-12 15:28:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:10,352 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:10,353 INFO L225 Difference]: With dead ends: 285 [2024-09-12 15:28:10,353 INFO L226 Difference]: Without dead ends: 235 [2024-09-12 15:28:10,354 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=682, Invalid=3224, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 15:28:10,354 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:10,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 532 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:28:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-12 15:28:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2024-09-12 15:28:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:10,504 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:10,504 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:10,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:10,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:10,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:10,505 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:10,516 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-09-12 15:28:10,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:10,705 INFO L399 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:10,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2039876023, now seen corresponding path program 70 times [2024-09-12 15:28:10,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:10,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012348423] [2024-09-12 15:28:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:10,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:11,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012348423] [2024-09-12 15:28:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012348423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798877454] [2024-09-12 15:28:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:28:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:11,111 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:11,112 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-09-12 15:28:11,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:28:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:11,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:11,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:11,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798877454] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:12,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:12,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2024-09-12 15:28:12,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138751752] [2024-09-12 15:28:12,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:12,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-12 15:28:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-12 15:28:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:28:12,171 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:13,034 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2024-09-12 15:28:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:13,035 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:13,036 INFO L225 Difference]: With dead ends: 291 [2024-09-12 15:28:13,037 INFO L226 Difference]: Without dead ends: 241 [2024-09-12 15:28:13,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 213 SyntacticMatches, 28 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=651, Invalid=3131, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:28:13,037 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:13,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 415 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-12 15:28:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2024-09-12 15:28:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:13,185 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:13,185 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:13,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:13,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:13,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:13,186 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:13,197 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-09-12 15:28:13,386 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2024-09-12 15:28:13,386 INFO L399 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:13,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1526774198, now seen corresponding path program 71 times [2024-09-12 15:28:13,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:13,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833573033] [2024-09-12 15:28:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833573033] [2024-09-12 15:28:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833573033] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687215041] [2024-09-12 15:28:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:28:13,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:13,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:13,782 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:13,783 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-09-12 15:28:13,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-12 15:28:13,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:13,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:13,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:14,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:14,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687215041] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:14,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:14,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2024-09-12 15:28:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506485294] [2024-09-12 15:28:14,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:14,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-12 15:28:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-12 15:28:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:28:14,825 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:15,741 INFO L93 Difference]: Finished difference Result 295 states and 339 transitions. [2024-09-12 15:28:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:15,743 INFO L225 Difference]: With dead ends: 295 [2024-09-12 15:28:15,743 INFO L226 Difference]: Without dead ends: 245 [2024-09-12 15:28:15,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 214 SyntacticMatches, 28 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:28:15,744 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:15,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 483 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-09-12 15:28:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 150. [2024-09-12 15:28:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:15,893 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:15,893 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:15,893 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:15,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:15,894 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:15,894 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:15,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2024-09-12 15:28:16,094 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-09-12 15:28:16,094 INFO L399 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:16,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:16,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1953460777, now seen corresponding path program 72 times [2024-09-12 15:28:16,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:16,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863239714] [2024-09-12 15:28:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:16,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:16,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:16,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863239714] [2024-09-12 15:28:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863239714] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:16,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644136886] [2024-09-12 15:28:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:28:16,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:16,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:16,497 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-09-12 15:28:16,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-12 15:28:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:16,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:16,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:17,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644136886] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:17,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:17,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2024-09-12 15:28:17,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900131450] [2024-09-12 15:28:17,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:17,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-12 15:28:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-12 15:28:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:28:17,602 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:18,544 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2024-09-12 15:28:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:18,545 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:18,547 INFO L225 Difference]: With dead ends: 297 [2024-09-12 15:28:18,547 INFO L226 Difference]: Without dead ends: 247 [2024-09-12 15:28:18,547 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 215 SyntacticMatches, 28 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=2939, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:28:18,548 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:18,548 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 432 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-12 15:28:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2024-09-12 15:28:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:18,708 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:18,708 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:18,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:18,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:18,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:18,709 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:18,721 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2024-09-12 15:28:18,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:18,910 INFO L399 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:18,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1536504214, now seen corresponding path program 73 times [2024-09-12 15:28:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781434220] [2024-09-12 15:28:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:19,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781434220] [2024-09-12 15:28:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781434220] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029384551] [2024-09-12 15:28:19,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:28:19,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:19,305 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:19,306 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-09-12 15:28:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:19,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:19,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:19,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:20,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029384551] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:20,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:20,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2024-09-12 15:28:20,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584730185] [2024-09-12 15:28:20,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:20,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-12 15:28:20,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-12 15:28:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:28:20,300 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:21,227 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2024-09-12 15:28:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:21,227 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:21,229 INFO L225 Difference]: With dead ends: 297 [2024-09-12 15:28:21,229 INFO L226 Difference]: Without dead ends: 247 [2024-09-12 15:28:21,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 28 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=582, Invalid=2840, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:28:21,229 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:21,229 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 381 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-12 15:28:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2024-09-12 15:28:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:21,418 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:21,418 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:21,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:21,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:21,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:21,419 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:21,430 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2024-09-12 15:28:21,619 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-09-12 15:28:21,619 INFO L399 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:21,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1398957577, now seen corresponding path program 74 times [2024-09-12 15:28:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:21,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370341977] [2024-09-12 15:28:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:22,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:22,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370341977] [2024-09-12 15:28:22,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370341977] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:22,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918659886] [2024-09-12 15:28:22,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:28:22,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:22,021 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:22,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-09-12 15:28:22,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:28:22,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:22,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:22,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:22,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:23,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918659886] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:23,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:23,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2024-09-12 15:28:23,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842789784] [2024-09-12 15:28:23,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:23,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 15:28:23,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:23,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 15:28:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:28:23,004 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:23,888 INFO L93 Difference]: Finished difference Result 295 states and 339 transitions. [2024-09-12 15:28:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:23,890 INFO L225 Difference]: With dead ends: 295 [2024-09-12 15:28:23,890 INFO L226 Difference]: Without dead ends: 245 [2024-09-12 15:28:23,890 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 217 SyntacticMatches, 28 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=567, Invalid=2739, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:28:23,891 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:23,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-09-12 15:28:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 150. [2024-09-12 15:28:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:24,045 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:24,045 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:24,045 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:24,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:24,046 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:24,046 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:24,057 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:24,246 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2024-09-12 15:28:24,246 INFO L399 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:24,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:24,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1554391414, now seen corresponding path program 75 times [2024-09-12 15:28:24,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:24,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183471250] [2024-09-12 15:28:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:24,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183471250] [2024-09-12 15:28:24,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183471250] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:24,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712790905] [2024-09-12 15:28:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:28:24,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:24,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:24,651 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:24,652 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-09-12 15:28:24,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-12 15:28:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:24,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:24,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:25,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:25,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712790905] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:25,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:25,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2024-09-12 15:28:25,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081788245] [2024-09-12 15:28:25,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:25,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:28:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:25,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:28:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:28:25,636 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:26,510 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2024-09-12 15:28:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:26,511 INFO L225 Difference]: With dead ends: 291 [2024-09-12 15:28:26,512 INFO L226 Difference]: Without dead ends: 241 [2024-09-12 15:28:26,512 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 218 SyntacticMatches, 28 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=556, Invalid=2636, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:28:26,512 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:26,512 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 393 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-12 15:28:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2024-09-12 15:28:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:26,662 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:26,663 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:26,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:26,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:26,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:26,663 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:26,675 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-09-12 15:28:26,864 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-09-12 15:28:26,864 INFO L399 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:26,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 264187415, now seen corresponding path program 76 times [2024-09-12 15:28:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948016472] [2024-09-12 15:28:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948016472] [2024-09-12 15:28:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948016472] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673959099] [2024-09-12 15:28:27,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:28:27,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:27,263 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:27,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-09-12 15:28:27,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:28:27,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:27,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:27,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:27,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:28,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673959099] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:28,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:28,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2024-09-12 15:28:28,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498085800] [2024-09-12 15:28:28,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:28,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-12 15:28:28,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:28,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-12 15:28:28,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 15:28:28,217 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:29,022 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2024-09-12 15:28:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:29,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:29,024 INFO L225 Difference]: With dead ends: 285 [2024-09-12 15:28:29,024 INFO L226 Difference]: Without dead ends: 235 [2024-09-12 15:28:29,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 219 SyntacticMatches, 28 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=549, Invalid=2531, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:28:29,024 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:29,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 324 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-12 15:28:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2024-09-12 15:28:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:29,187 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:29,187 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:29,188 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:29,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:29,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:29,188 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:29,200 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:29,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-09-12 15:28:29,389 INFO L399 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:29,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1024358058, now seen corresponding path program 77 times [2024-09-12 15:28:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210165198] [2024-09-12 15:28:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210165198] [2024-09-12 15:28:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210165198] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089914353] [2024-09-12 15:28:29,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:28:29,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:29,790 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:29,791 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-09-12 15:28:29,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-12 15:28:29,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:29,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:29,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:30,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089914353] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:30,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:30,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2024-09-12 15:28:30,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539864173] [2024-09-12 15:28:30,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:30,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 15:28:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 15:28:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:28:30,732 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:31,433 INFO L93 Difference]: Finished difference Result 277 states and 321 transitions. [2024-09-12 15:28:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:31,433 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:31,435 INFO L225 Difference]: With dead ends: 277 [2024-09-12 15:28:31,435 INFO L226 Difference]: Without dead ends: 227 [2024-09-12 15:28:31,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 220 SyntacticMatches, 28 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=2424, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 15:28:31,436 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:31,436 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 276 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:28:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-12 15:28:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 150. [2024-09-12 15:28:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:31,604 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:31,604 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:31,604 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:31,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:31,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:31,605 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:31,616 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-09-12 15:28:31,805 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-09-12 15:28:31,805 INFO L399 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:31,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1065924041, now seen corresponding path program 78 times [2024-09-12 15:28:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:31,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361956740] [2024-09-12 15:28:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:31,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:32,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361956740] [2024-09-12 15:28:32,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361956740] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652986411] [2024-09-12 15:28:32,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:28:32,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:32,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:32,208 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:32,208 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-09-12 15:28:32,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-12 15:28:32,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:32,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:32,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:32,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:33,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652986411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:33,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:33,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2024-09-12 15:28:33,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026620890] [2024-09-12 15:28:33,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:33,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-12 15:28:33,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:33,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-12 15:28:33,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:28:33,122 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:33,743 INFO L93 Difference]: Finished difference Result 267 states and 311 transitions. [2024-09-12 15:28:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:33,745 INFO L225 Difference]: With dead ends: 267 [2024-09-12 15:28:33,745 INFO L226 Difference]: Without dead ends: 217 [2024-09-12 15:28:33,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 221 SyntacticMatches, 28 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=2315, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:28:33,746 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:33,746 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 358 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-12 15:28:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 150. [2024-09-12 15:28:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-12 15:28:33,919 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-12 15:28:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:33,919 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-12 15:28:33,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:33,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:33,920 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-12 15:28:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:28:33,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:33,920 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:33,931 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:34,120 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:34,120 INFO L399 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:34,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 179661110, now seen corresponding path program 13 times [2024-09-12 15:28:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:34,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112850044] [2024-09-12 15:28:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:34,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:28:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:28:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-12 15:28:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 15:28:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-12 15:28:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-12 15:28:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:28:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-12 15:28:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-12 15:28:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-12 15:28:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-12 15:28:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:28:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-12 15:28:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:34,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112850044] [2024-09-12 15:28:34,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112850044] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831499043] [2024-09-12 15:28:34,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:28:34,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:34,520 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:34,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-09-12 15:28:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:34,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:28:34,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:35,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:35,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831499043] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:35,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:35,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2024-09-12 15:28:35,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430199855] [2024-09-12 15:28:35,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:35,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-12 15:28:35,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-12 15:28:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:28:35,427 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:35,951 INFO L93 Difference]: Finished difference Result 258 states and 303 transitions. [2024-09-12 15:28:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:28:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-12 15:28:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:35,953 INFO L225 Difference]: With dead ends: 258 [2024-09-12 15:28:35,953 INFO L226 Difference]: Without dead ends: 208 [2024-09-12 15:28:35,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 222 SyntacticMatches, 28 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=552, Invalid=2204, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:28:35,954 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:35,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 389 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:35,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-09-12 15:28:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 152. [2024-09-12 15:28:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 121 states have internal predecessors, (137), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:28:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2024-09-12 15:28:36,113 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 120 [2024-09-12 15:28:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:36,113 INFO L474 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2024-09-12 15:28:36,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-12 15:28:36,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2024-09-12 15:28:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-12 15:28:36,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:36,114 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:36,125 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:36,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:36,314 INFO L399 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:36,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:36,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1632046878, now seen corresponding path program 26 times [2024-09-12 15:28:36,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:36,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128499306] [2024-09-12 15:28:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:36,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 117 proven. 274 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:36,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:36,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128499306] [2024-09-12 15:28:36,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128499306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:36,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797721056] [2024-09-12 15:28:36,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:28:36,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:36,565 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:36,566 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-09-12 15:28:36,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:28:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:36,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 15:28:36,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:36,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-12 15:28:36,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797721056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:36,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:36,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2024-09-12 15:28:36,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282995736] [2024-09-12 15:28:36,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:36,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 15:28:36,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 15:28:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2024-09-12 15:28:36,945 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:28:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:37,253 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2024-09-12 15:28:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:28:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 121 [2024-09-12 15:28:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:37,255 INFO L225 Difference]: With dead ends: 165 [2024-09-12 15:28:37,255 INFO L226 Difference]: Without dead ends: 163 [2024-09-12 15:28:37,255 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 251 SyntacticMatches, 30 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:28:37,255 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:37,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 317 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:28:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-12 15:28:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2024-09-12 15:28:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.136) internal successors, (142), 126 states have internal predecessors, (142), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2024-09-12 15:28:37,410 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 121 [2024-09-12 15:28:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:37,411 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2024-09-12 15:28:37,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:28:37,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2024-09-12 15:28:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:37,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:37,411 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:37,423 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:37,612 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2024-09-12 15:28:37,612 INFO L399 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:37,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1580169674, now seen corresponding path program 27 times [2024-09-12 15:28:37,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:37,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594167114] [2024-09-12 15:28:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:37,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:38,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:38,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594167114] [2024-09-12 15:28:38,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594167114] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:38,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133369788] [2024-09-12 15:28:38,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:28:38,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:38,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:38,077 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:38,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-09-12 15:28:38,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-12 15:28:38,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:38,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:38,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:38,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133369788] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:39,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:39,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-12 15:28:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480409237] [2024-09-12 15:28:39,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:39,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-12 15:28:39,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-12 15:28:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:28:39,344 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:39,921 INFO L93 Difference]: Finished difference Result 272 states and 319 transitions. [2024-09-12 15:28:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:28:39,921 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:28:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:39,923 INFO L225 Difference]: With dead ends: 272 [2024-09-12 15:28:39,923 INFO L226 Difference]: Without dead ends: 219 [2024-09-12 15:28:39,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 223 SyntacticMatches, 30 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=899, Invalid=3931, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 15:28:39,924 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:39,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 320 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-12 15:28:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2024-09-12 15:28:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:28:40,106 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:28:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:40,106 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:28:40,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:40,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:28:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:40,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:40,106 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:40,118 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2024-09-12 15:28:40,307 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2024-09-12 15:28:40,307 INFO L399 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:40,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash -634376267, now seen corresponding path program 79 times [2024-09-12 15:28:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:40,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663467688] [2024-09-12 15:28:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:40,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663467688] [2024-09-12 15:28:40,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663467688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202804610] [2024-09-12 15:28:40,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:28:40,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:40,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:40,763 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:40,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-09-12 15:28:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:40,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:40,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:41,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:41,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202804610] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:41,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:41,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2024-09-12 15:28:41,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532561073] [2024-09-12 15:28:41,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:41,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-12 15:28:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-12 15:28:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 15:28:41,999 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:42,888 INFO L93 Difference]: Finished difference Result 285 states and 332 transitions. [2024-09-12 15:28:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:28:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:28:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:42,891 INFO L225 Difference]: With dead ends: 285 [2024-09-12 15:28:42,891 INFO L226 Difference]: Without dead ends: 232 [2024-09-12 15:28:42,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 224 SyntacticMatches, 30 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=853, Invalid=3839, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:28:42,892 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:42,892 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 514 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:28:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-12 15:28:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2024-09-12 15:28:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:28:43,149 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:28:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:43,149 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:28:43,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:43,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:28:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:43,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:43,150 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:43,167 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2024-09-12 15:28:43,351 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:43,351 INFO L399 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:43,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash -326772138, now seen corresponding path program 80 times [2024-09-12 15:28:43,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:43,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465433897] [2024-09-12 15:28:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465433897] [2024-09-12 15:28:43,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465433897] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349343050] [2024-09-12 15:28:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:28:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:43,806 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:43,807 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-09-12 15:28:43,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:28:43,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:43,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:43,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:44,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:45,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349343050] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:45,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:45,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2024-09-12 15:28:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994705881] [2024-09-12 15:28:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:45,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-12 15:28:45,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-12 15:28:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 15:28:45,021 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:45,948 INFO L93 Difference]: Finished difference Result 296 states and 343 transitions. [2024-09-12 15:28:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:28:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:28:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:45,950 INFO L225 Difference]: With dead ends: 296 [2024-09-12 15:28:45,950 INFO L226 Difference]: Without dead ends: 243 [2024-09-12 15:28:45,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 225 SyntacticMatches, 30 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3581 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=811, Invalid=3745, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 15:28:45,951 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:45,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 502 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:28:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-12 15:28:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2024-09-12 15:28:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:28:46,148 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:28:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:46,148 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:28:46,148 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:46,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:28:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:46,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:46,149 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:46,161 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2024-09-12 15:28:46,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:46,350 INFO L399 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:46,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 930076565, now seen corresponding path program 81 times [2024-09-12 15:28:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:46,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310212241] [2024-09-12 15:28:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:46,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:46,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310212241] [2024-09-12 15:28:46,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310212241] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:46,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601620301] [2024-09-12 15:28:46,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:28:46,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:46,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:46,801 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:46,801 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-09-12 15:28:46,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-12 15:28:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:46,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:46,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:47,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:48,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601620301] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:48,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2024-09-12 15:28:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836363019] [2024-09-12 15:28:48,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:48,018 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-12 15:28:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:48,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-12 15:28:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2024-09-12 15:28:48,019 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:49,066 INFO L93 Difference]: Finished difference Result 305 states and 352 transitions. [2024-09-12 15:28:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:28:49,066 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:28:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:49,068 INFO L225 Difference]: With dead ends: 305 [2024-09-12 15:28:49,068 INFO L226 Difference]: Without dead ends: 252 [2024-09-12 15:28:49,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 226 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=773, Invalid=3649, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 15:28:49,069 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:49,069 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 447 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:28:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-12 15:28:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 160. [2024-09-12 15:28:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:28:49,279 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:28:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:49,279 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:28:49,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:49,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:28:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:49,280 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:49,280 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:49,292 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2024-09-12 15:28:49,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:49,481 INFO L399 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:49,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -691947914, now seen corresponding path program 82 times [2024-09-12 15:28:49,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367763520] [2024-09-12 15:28:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:49,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:49,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:49,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:49,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:49,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:49,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:49,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:50,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:50,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367763520] [2024-09-12 15:28:50,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367763520] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:50,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255040814] [2024-09-12 15:28:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:28:50,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:50,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:50,010 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:50,011 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-09-12 15:28:50,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:28:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:50,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:50,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:50,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:51,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255040814] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:51,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:51,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2024-09-12 15:28:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234523133] [2024-09-12 15:28:51,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:51,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-12 15:28:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-12 15:28:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 15:28:51,189 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:52,324 INFO L93 Difference]: Finished difference Result 312 states and 359 transitions. [2024-09-12 15:28:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:28:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:28:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:52,326 INFO L225 Difference]: With dead ends: 312 [2024-09-12 15:28:52,326 INFO L226 Difference]: Without dead ends: 259 [2024-09-12 15:28:52,326 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 227 SyntacticMatches, 30 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=739, Invalid=3551, Unknown=0, NotChecked=0, Total=4290 [2024-09-12 15:28:52,327 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:52,327 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 324 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:28:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-12 15:28:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 160. [2024-09-12 15:28:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:28:52,529 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:28:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:52,529 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:28:52,530 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:52,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:28:52,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:52,530 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:52,530 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:52,542 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2024-09-12 15:28:52,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,124 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:52,731 INFO L399 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:52,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 641202037, now seen corresponding path program 83 times [2024-09-12 15:28:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:52,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646284118] [2024-09-12 15:28:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:53,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646284118] [2024-09-12 15:28:53,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646284118] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353044334] [2024-09-12 15:28:53,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:28:53,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:53,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:53,177 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:53,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-09-12 15:28:53,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-12 15:28:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:53,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:53,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:53,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:54,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353044334] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:54,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:54,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2024-09-12 15:28:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766969450] [2024-09-12 15:28:54,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:54,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-12 15:28:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-12 15:28:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2024-09-12 15:28:54,324 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:55,615 INFO L93 Difference]: Finished difference Result 317 states and 364 transitions. [2024-09-12 15:28:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:28:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:28:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:55,617 INFO L225 Difference]: With dead ends: 317 [2024-09-12 15:28:55,617 INFO L226 Difference]: Without dead ends: 264 [2024-09-12 15:28:55,618 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 228 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=709, Invalid=3451, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 15:28:55,618 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:55,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 550 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:28:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-12 15:28:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2024-09-12 15:28:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:28:55,823 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:28:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:55,823 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:28:55,823 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:55,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:28:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:55,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:55,824 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:55,835 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2024-09-12 15:28:56,024 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-09-12 15:28:56,024 INFO L399 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:56,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash 545659542, now seen corresponding path program 84 times [2024-09-12 15:28:56,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:56,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677549948] [2024-09-12 15:28:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:56,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:56,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677549948] [2024-09-12 15:28:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677549948] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606502686] [2024-09-12 15:28:56,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:28:56,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:56,587 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:56,588 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2024-09-12 15:28:56,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-09-12 15:28:56,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:28:56,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:56,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:28:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:57,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:28:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:57,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606502686] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:28:57,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:28:57,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2024-09-12 15:28:57,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290108249] [2024-09-12 15:28:57,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:28:57,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-12 15:28:57,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:28:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-12 15:28:57,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 15:28:57,714 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:28:59,047 INFO L93 Difference]: Finished difference Result 320 states and 367 transitions. [2024-09-12 15:28:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:28:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:28:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:28:59,050 INFO L225 Difference]: With dead ends: 320 [2024-09-12 15:28:59,050 INFO L226 Difference]: Without dead ends: 267 [2024-09-12 15:28:59,050 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 229 SyntacticMatches, 30 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=683, Invalid=3349, Unknown=0, NotChecked=0, Total=4032 [2024-09-12 15:28:59,050 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:28:59,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 487 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:28:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-12 15:28:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 160. [2024-09-12 15:28:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:28:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:28:59,257 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:28:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:28:59,257 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:28:59,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:28:59,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:28:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:28:59,258 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:28:59,258 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:28:59,270 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2024-09-12 15:28:59,458 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-09-12 15:28:59,458 INFO L399 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:28:59,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:28:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash -565801131, now seen corresponding path program 85 times [2024-09-12 15:28:59,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:28:59,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358824444] [2024-09-12 15:28:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:28:59,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:28:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:28:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:28:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:28:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:28:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:28:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:28:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:28:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:28:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:28:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:28:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:28:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:28:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:28:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:28:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:28:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 289 proven. 96 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:28:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:28:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358824444] [2024-09-12 15:28:59,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358824444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:28:59,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322470860] [2024-09-12 15:28:59,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:28:59,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:28:59,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:28:59,899 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:28:59,900 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-09-12 15:28:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:28:59,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:28:59,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:00,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:01,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322470860] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:01,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2024-09-12 15:29:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507372682] [2024-09-12 15:29:01,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:01,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-12 15:29:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-12 15:29:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:29:01,008 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:02,280 INFO L93 Difference]: Finished difference Result 321 states and 368 transitions. [2024-09-12 15:29:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:02,282 INFO L225 Difference]: With dead ends: 321 [2024-09-12 15:29:02,283 INFO L226 Difference]: Without dead ends: 268 [2024-09-12 15:29:02,283 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 230 SyntacticMatches, 30 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=661, Invalid=3245, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 15:29:02,283 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:02,283 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 330 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-09-12 15:29:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 160. [2024-09-12 15:29:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:29:02,499 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:29:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:02,499 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:29:02,499 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:02,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:29:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:29:02,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:02,500 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:02,512 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2024-09-12 15:29:02,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:02,700 INFO L399 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:02,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1571486026, now seen corresponding path program 86 times [2024-09-12 15:29:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417162759] [2024-09-12 15:29:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:29:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:29:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:29:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:29:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:29:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:29:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:29:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:29:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:29:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:29:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:29:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:29:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:29:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:29:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:03,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:03,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417162759] [2024-09-12 15:29:03,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417162759] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:03,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888969832] [2024-09-12 15:29:03,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:29:03,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:03,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:03,140 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:03,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-09-12 15:29:03,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:29:03,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:03,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:29:03,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:03,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:04,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888969832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:04,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:04,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2024-09-12 15:29:04,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863376268] [2024-09-12 15:29:04,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:04,237 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-12 15:29:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-12 15:29:04,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:29:04,237 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:05,489 INFO L93 Difference]: Finished difference Result 320 states and 367 transitions. [2024-09-12 15:29:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:05,492 INFO L225 Difference]: With dead ends: 320 [2024-09-12 15:29:05,492 INFO L226 Difference]: Without dead ends: 267 [2024-09-12 15:29:05,493 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 231 SyntacticMatches, 30 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=643, Invalid=3139, Unknown=0, NotChecked=0, Total=3782 [2024-09-12 15:29:05,493 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:05,493 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-12 15:29:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 160. [2024-09-12 15:29:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:29:05,704 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:29:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:05,705 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:29:05,705 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:05,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:29:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:29:05,705 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:05,706 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:05,718 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2024-09-12 15:29:05,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:05,906 INFO L399 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:05,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1859755829, now seen corresponding path program 87 times [2024-09-12 15:29:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:05,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761496459] [2024-09-12 15:29:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:05,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:29:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:29:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:29:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:29:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:29:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:29:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:29:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:29:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:29:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:29:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:29:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:29:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:29:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:29:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:06,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:06,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761496459] [2024-09-12 15:29:06,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761496459] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:06,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073516764] [2024-09-12 15:29:06,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:29:06,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:06,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:06,346 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:06,348 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2024-09-12 15:29:06,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-12 15:29:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:06,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:29:06,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:07,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:07,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073516764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:07,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:07,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2024-09-12 15:29:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641743535] [2024-09-12 15:29:07,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:07,447 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-12 15:29:07,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:07,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-12 15:29:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:29:07,448 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:08,741 INFO L93 Difference]: Finished difference Result 317 states and 364 transitions. [2024-09-12 15:29:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:08,743 INFO L225 Difference]: With dead ends: 317 [2024-09-12 15:29:08,744 INFO L226 Difference]: Without dead ends: 264 [2024-09-12 15:29:08,744 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 232 SyntacticMatches, 30 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=629, Invalid=3031, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:29:08,744 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:08,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 444 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-12 15:29:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2024-09-12 15:29:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:29:08,952 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:29:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:08,952 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:29:08,952 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:08,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:29:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:29:08,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:08,953 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:08,964 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2024-09-12 15:29:09,153 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-09-12 15:29:09,153 INFO L399 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:09,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1831893718, now seen corresponding path program 88 times [2024-09-12 15:29:09,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:09,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803927665] [2024-09-12 15:29:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:09,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:29:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:29:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:29:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:29:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:29:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:29:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:29:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:29:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:29:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:29:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:29:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:29:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:29:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:29:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:09,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803927665] [2024-09-12 15:29:09,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803927665] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229682923] [2024-09-12 15:29:09,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:29:09,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:09,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:09,604 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:09,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-09-12 15:29:09,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:29:09,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:09,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:29:09,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:10,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:10,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229682923] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:10,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:10,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2024-09-12 15:29:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109972701] [2024-09-12 15:29:10,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:10,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-12 15:29:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-12 15:29:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:29:10,663 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:11,825 INFO L93 Difference]: Finished difference Result 312 states and 359 transitions. [2024-09-12 15:29:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:11,827 INFO L225 Difference]: With dead ends: 312 [2024-09-12 15:29:11,827 INFO L226 Difference]: Without dead ends: 259 [2024-09-12 15:29:11,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 233 SyntacticMatches, 30 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=619, Invalid=2921, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:29:11,827 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:11,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 500 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-12 15:29:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 160. [2024-09-12 15:29:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:29:12,042 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:29:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:12,042 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:29:12,042 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:12,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:29:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:29:12,043 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:12,043 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:12,054 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2024-09-12 15:29:12,243 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,130 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:12,243 INFO L399 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:12,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1632688363, now seen corresponding path program 89 times [2024-09-12 15:29:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321936717] [2024-09-12 15:29:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:29:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:29:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:29:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:29:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:29:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:29:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:29:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:29:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:29:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:29:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:29:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:29:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:29:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:29:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:12,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:12,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321936717] [2024-09-12 15:29:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321936717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:12,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045527137] [2024-09-12 15:29:12,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:29:12,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:12,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:12,685 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:12,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-09-12 15:29:12,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-12 15:29:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:12,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:29:12,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:13,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045527137] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:13,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2024-09-12 15:29:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113443526] [2024-09-12 15:29:13,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:13,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-12 15:29:13,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-12 15:29:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:29:13,741 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:14,808 INFO L93 Difference]: Finished difference Result 305 states and 352 transitions. [2024-09-12 15:29:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:14,810 INFO L225 Difference]: With dead ends: 305 [2024-09-12 15:29:14,810 INFO L226 Difference]: Without dead ends: 252 [2024-09-12 15:29:14,810 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 234 SyntacticMatches, 30 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=613, Invalid=2809, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:29:14,810 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:14,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 368 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-12 15:29:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 160. [2024-09-12 15:29:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:29:15,021 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:29:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:15,021 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:29:15,021 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:15,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:29:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:29:15,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:15,021 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:15,033 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-09-12 15:29:15,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:15,222 INFO L399 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:15,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -358975754, now seen corresponding path program 90 times [2024-09-12 15:29:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:15,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729696444] [2024-09-12 15:29:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:29:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:29:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:29:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:29:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:29:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:29:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:29:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:29:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:29:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:29:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:29:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:29:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:29:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:29:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:15,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729696444] [2024-09-12 15:29:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729696444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778266382] [2024-09-12 15:29:15,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:29:15,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:15,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:15,665 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:15,666 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2024-09-12 15:29:15,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-09-12 15:29:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:15,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:29:15,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:16,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778266382] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:16,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:16,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2024-09-12 15:29:16,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910561345] [2024-09-12 15:29:16,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:16,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-12 15:29:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-12 15:29:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:29:16,695 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:17,631 INFO L93 Difference]: Finished difference Result 296 states and 343 transitions. [2024-09-12 15:29:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:17,633 INFO L225 Difference]: With dead ends: 296 [2024-09-12 15:29:17,633 INFO L226 Difference]: Without dead ends: 243 [2024-09-12 15:29:17,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 235 SyntacticMatches, 30 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:29:17,634 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:17,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 354 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-12 15:29:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2024-09-12 15:29:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:29:17,850 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:29:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:17,850 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:29:17,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:17,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:29:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:29:17,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:17,851 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:17,862 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2024-09-12 15:29:18,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:18,051 INFO L399 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:18,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash -872077579, now seen corresponding path program 91 times [2024-09-12 15:29:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:18,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857555509] [2024-09-12 15:29:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:29:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:29:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:29:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:29:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:29:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:29:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:29:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:29:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:29:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:29:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:29:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:29:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:29:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:29:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:18,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:18,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857555509] [2024-09-12 15:29:18,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857555509] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:18,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235035364] [2024-09-12 15:29:18,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:29:18,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:18,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:18,499 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:18,500 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-09-12 15:29:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:18,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:29:18,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:19,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:19,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235035364] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:19,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:19,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2024-09-12 15:29:19,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815411479] [2024-09-12 15:29:19,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:19,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:29:19,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:29:19,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:29:19,497 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:20,357 INFO L93 Difference]: Finished difference Result 285 states and 332 transitions. [2024-09-12 15:29:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:20,359 INFO L225 Difference]: With dead ends: 285 [2024-09-12 15:29:20,360 INFO L226 Difference]: Without dead ends: 232 [2024-09-12 15:29:20,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 236 SyntacticMatches, 30 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=613, Invalid=2579, Unknown=0, NotChecked=0, Total=3192 [2024-09-12 15:29:20,360 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:20,360 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 364 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-12 15:29:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2024-09-12 15:29:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-12 15:29:20,591 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-12 15:29:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:20,591 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-12 15:29:20,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:20,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-12 15:29:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:29:20,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:20,592 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:20,603 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2024-09-12 15:29:20,792 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,133 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:20,792 INFO L399 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:20,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash -57345258, now seen corresponding path program 14 times [2024-09-12 15:29:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:20,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164926014] [2024-09-12 15:29:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:29:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 15:29:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:29:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-12 15:29:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-12 15:29:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:29:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-12 15:29:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:29:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-12 15:29:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:29:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-12 15:29:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-12 15:29:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-12 15:29:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-12 15:29:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164926014] [2024-09-12 15:29:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164926014] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543968319] [2024-09-12 15:29:21,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:29:21,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:21,233 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:21,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-09-12 15:29:21,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:29:21,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:21,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:29:21,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:21,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543968319] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:22,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2024-09-12 15:29:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914452370] [2024-09-12 15:29:22,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:22,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-12 15:29:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-12 15:29:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 15:29:22,233 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:22,931 INFO L93 Difference]: Finished difference Result 275 states and 323 transitions. [2024-09-12 15:29:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:29:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-12 15:29:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:22,933 INFO L225 Difference]: With dead ends: 275 [2024-09-12 15:29:22,933 INFO L226 Difference]: Without dead ends: 222 [2024-09-12 15:29:22,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 30 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=619, Invalid=2461, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:29:22,934 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:22,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 567 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-12 15:29:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 162. [2024-09-12 15:29:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 128 states have (on average 1.140625) internal successors, (146), 129 states have internal predecessors, (146), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:29:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 179 transitions. [2024-09-12 15:29:23,151 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 179 transitions. Word has length 128 [2024-09-12 15:29:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:23,151 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 179 transitions. [2024-09-12 15:29:23,151 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-12 15:29:23,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 179 transitions. [2024-09-12 15:29:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-12 15:29:23,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:23,151 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:23,163 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2024-09-12 15:29:23,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2024-09-12 15:29:23,352 INFO L399 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:23,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1636582049, now seen corresponding path program 28 times [2024-09-12 15:29:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:23,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845332965] [2024-09-12 15:29:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:23,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 133 proven. 316 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:23,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:23,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845332965] [2024-09-12 15:29:23,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845332965] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:23,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718277394] [2024-09-12 15:29:23,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:29:23,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:23,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:23,602 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:23,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2024-09-12 15:29:23,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:29:23,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:23,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 15:29:23,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:23,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-12 15:29:24,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718277394] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:24,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:24,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2024-09-12 15:29:24,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733710078] [2024-09-12 15:29:24,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:24,006 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:29:24,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:29:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:29:24,007 INFO L87 Difference]: Start difference. First operand 162 states and 179 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:29:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:24,374 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2024-09-12 15:29:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:29:24,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 129 [2024-09-12 15:29:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:24,376 INFO L225 Difference]: With dead ends: 175 [2024-09-12 15:29:24,376 INFO L226 Difference]: Without dead ends: 173 [2024-09-12 15:29:24,376 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 268 SyntacticMatches, 32 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:29:24,377 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:24,377 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 344 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:29:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-12 15:29:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2024-09-12 15:29:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 134 states have internal predecessors, (151), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2024-09-12 15:29:24,594 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 129 [2024-09-12 15:29:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:24,594 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2024-09-12 15:29:24,594 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:29:24,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2024-09-12 15:29:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:24,595 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:24,595 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:24,607 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2024-09-12 15:29:24,795 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2024-09-12 15:29:24,795 INFO L399 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:24,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1540394903, now seen corresponding path program 29 times [2024-09-12 15:29:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556470180] [2024-09-12 15:29:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 332 proven. 163 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556470180] [2024-09-12 15:29:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556470180] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701743304] [2024-09-12 15:29:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:29:25,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:25,308 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:25,309 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-09-12 15:29:25,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-12 15:29:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:25,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:25,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:26,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:26,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701743304] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:26,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:26,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2024-09-12 15:29:26,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485529260] [2024-09-12 15:29:26,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:26,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-12 15:29:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-12 15:29:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2024-09-12 15:29:26,685 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 73 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 73 states have internal predecessors, (118), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:27,416 INFO L93 Difference]: Finished difference Result 289 states and 339 transitions. [2024-09-12 15:29:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 73 states have internal predecessors, (118), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:27,418 INFO L225 Difference]: With dead ends: 289 [2024-09-12 15:29:27,418 INFO L226 Difference]: Without dead ends: 233 [2024-09-12 15:29:27,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 237 SyntacticMatches, 32 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4364 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1005, Invalid=4397, Unknown=0, NotChecked=0, Total=5402 [2024-09-12 15:29:27,419 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:27,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 390 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-12 15:29:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 170. [2024-09-12 15:29:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:27,665 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:27,665 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:27,665 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 73 states have internal predecessors, (118), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:27,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:27,666 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:27,666 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:27,679 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2024-09-12 15:29:27,866 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2024-09-12 15:29:27,866 INFO L399 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:27,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:27,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2140517866, now seen corresponding path program 92 times [2024-09-12 15:29:27,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:27,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608143832] [2024-09-12 15:29:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:27,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 332 proven. 149 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:28,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:28,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608143832] [2024-09-12 15:29:28,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608143832] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:28,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990428082] [2024-09-12 15:29:28,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:29:28,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:28,381 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:28,384 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2024-09-12 15:29:28,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:29:28,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:28,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:28,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:29,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:29,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990428082] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:29,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:29,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 72 [2024-09-12 15:29:29,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528455429] [2024-09-12 15:29:29,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:29,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-12 15:29:29,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:29,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-12 15:29:29,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2024-09-12 15:29:29,733 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 72 states, 72 states have (on average 1.625) internal successors, (117), 72 states have internal predecessors, (117), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:30,627 INFO L93 Difference]: Finished difference Result 303 states and 353 transitions. [2024-09-12 15:29:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:30,627 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.625) internal successors, (117), 72 states have internal predecessors, (117), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:30,629 INFO L225 Difference]: With dead ends: 303 [2024-09-12 15:29:30,629 INFO L226 Difference]: Without dead ends: 247 [2024-09-12 15:29:30,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 238 SyntacticMatches, 32 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4246 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=956, Invalid=4300, Unknown=0, NotChecked=0, Total=5256 [2024-09-12 15:29:30,630 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:30,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-12 15:29:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 170. [2024-09-12 15:29:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:30,885 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:30,885 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:30,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.625) internal successors, (117), 72 states have internal predecessors, (117), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:30,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:30,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:30,886 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:30,897 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2024-09-12 15:29:31,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2024-09-12 15:29:31,086 INFO L399 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:31,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:31,087 INFO L85 PathProgramCache]: Analyzing trace with hash 511689655, now seen corresponding path program 93 times [2024-09-12 15:29:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:31,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042100249] [2024-09-12 15:29:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:31,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 332 proven. 137 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:31,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:31,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042100249] [2024-09-12 15:29:31,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042100249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:31,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521764153] [2024-09-12 15:29:31,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:29:31,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:31,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:31,652 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:31,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2024-09-12 15:29:31,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-12 15:29:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:31,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:31,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:32,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:32,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521764153] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:32,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:32,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 71 [2024-09-12 15:29:32,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950657951] [2024-09-12 15:29:32,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:32,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-12 15:29:32,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:32,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-12 15:29:32,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2024-09-12 15:29:32,987 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:34,167 INFO L93 Difference]: Finished difference Result 315 states and 365 transitions. [2024-09-12 15:29:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:34,169 INFO L225 Difference]: With dead ends: 315 [2024-09-12 15:29:34,169 INFO L226 Difference]: Without dead ends: 259 [2024-09-12 15:29:34,169 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 239 SyntacticMatches, 32 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=911, Invalid=4201, Unknown=0, NotChecked=0, Total=5112 [2024-09-12 15:29:34,170 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:34,170 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 473 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:29:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-12 15:29:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 170. [2024-09-12 15:29:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:34,432 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:34,432 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:34,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:34,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:34,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:34,432 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:34,444 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2024-09-12 15:29:34,633 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,138 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:34,633 INFO L399 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:34,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1896607242, now seen corresponding path program 94 times [2024-09-12 15:29:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:34,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576786910] [2024-09-12 15:29:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 332 proven. 127 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576786910] [2024-09-12 15:29:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576786910] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545338814] [2024-09-12 15:29:35,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:29:35,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:35,136 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:35,138 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2024-09-12 15:29:35,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:29:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:35,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:35,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:36,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:36,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545338814] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:36,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:36,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 70 [2024-09-12 15:29:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188106916] [2024-09-12 15:29:36,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:36,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-09-12 15:29:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:36,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-09-12 15:29:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 15:29:36,480 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 70 states have internal predecessors, (115), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:37,822 INFO L93 Difference]: Finished difference Result 325 states and 375 transitions. [2024-09-12 15:29:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 70 states have internal predecessors, (115), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:37,825 INFO L225 Difference]: With dead ends: 325 [2024-09-12 15:29:37,825 INFO L226 Difference]: Without dead ends: 269 [2024-09-12 15:29:37,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 240 SyntacticMatches, 32 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3895 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=4100, Unknown=0, NotChecked=0, Total=4970 [2024-09-12 15:29:37,825 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:37,825 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 492 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:29:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-09-12 15:29:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 170. [2024-09-12 15:29:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:38,096 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:38,097 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:38,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 70 states have internal predecessors, (115), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:38,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:38,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:38,097 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:38,109 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2024-09-12 15:29:38,298 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2024-09-12 15:29:38,298 INFO L399 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:38,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash -173178921, now seen corresponding path program 95 times [2024-09-12 15:29:38,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:38,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187073036] [2024-09-12 15:29:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:38,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 332 proven. 119 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:38,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187073036] [2024-09-12 15:29:38,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187073036] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098985945] [2024-09-12 15:29:38,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:29:38,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:38,786 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:38,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2024-09-12 15:29:38,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-12 15:29:38,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:38,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:38,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:39,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:40,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098985945] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:40,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:40,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2024-09-12 15:29:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000831321] [2024-09-12 15:29:40,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:40,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-12 15:29:40,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-12 15:29:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:29:40,075 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 69 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 69 states have internal predecessors, (114), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:41,585 INFO L93 Difference]: Finished difference Result 333 states and 383 transitions. [2024-09-12 15:29:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 69 states have internal predecessors, (114), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:41,587 INFO L225 Difference]: With dead ends: 333 [2024-09-12 15:29:41,587 INFO L226 Difference]: Without dead ends: 277 [2024-09-12 15:29:41,588 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 241 SyntacticMatches, 32 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=833, Invalid=3997, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 15:29:41,588 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:41,588 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:29:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-09-12 15:29:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 170. [2024-09-12 15:29:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:41,870 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:41,870 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:41,870 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 69 states have internal predecessors, (114), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:41,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:41,871 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:41,871 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:41,883 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2024-09-12 15:29:42,071 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,140 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:42,072 INFO L399 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:42,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash 990794198, now seen corresponding path program 96 times [2024-09-12 15:29:42,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:42,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786274246] [2024-09-12 15:29:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:42,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 332 proven. 113 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:42,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:42,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786274246] [2024-09-12 15:29:42,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786274246] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:42,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124269575] [2024-09-12 15:29:42,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:29:42,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:42,565 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:42,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2024-09-12 15:29:42,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-09-12 15:29:42,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:42,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:42,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:43,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:43,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124269575] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:43,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:43,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 68 [2024-09-12 15:29:43,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307511000] [2024-09-12 15:29:43,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:43,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-12 15:29:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-12 15:29:43,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3764, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 15:29:43,829 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 68 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:45,354 INFO L93 Difference]: Finished difference Result 339 states and 389 transitions. [2024-09-12 15:29:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:45,356 INFO L225 Difference]: With dead ends: 339 [2024-09-12 15:29:45,356 INFO L226 Difference]: Without dead ends: 283 [2024-09-12 15:29:45,356 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 242 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3556 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=800, Invalid=3892, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:29:45,357 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:45,357 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-12 15:29:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 170. [2024-09-12 15:29:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:45,633 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:45,634 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:45,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:45,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:45,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:45,634 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:45,648 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2024-09-12 15:29:45,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:45,835 INFO L399 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:45,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2136720375, now seen corresponding path program 97 times [2024-09-12 15:29:45,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:45,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091672711] [2024-09-12 15:29:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 332 proven. 109 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091672711] [2024-09-12 15:29:46,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091672711] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448494884] [2024-09-12 15:29:46,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:29:46,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:46,327 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:46,327 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2024-09-12 15:29:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:46,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:46,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:47,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:47,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448494884] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:47,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:47,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 67 [2024-09-12 15:29:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013293100] [2024-09-12 15:29:47,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:47,583 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-12 15:29:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-12 15:29:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3659, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 15:29:47,584 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 67 states, 67 states have (on average 1.671641791044776) internal successors, (112), 67 states have internal predecessors, (112), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:49,314 INFO L93 Difference]: Finished difference Result 343 states and 393 transitions. [2024-09-12 15:29:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:49,314 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.671641791044776) internal successors, (112), 67 states have internal predecessors, (112), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:49,316 INFO L225 Difference]: With dead ends: 343 [2024-09-12 15:29:49,317 INFO L226 Difference]: Without dead ends: 287 [2024-09-12 15:29:49,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 243 SyntacticMatches, 32 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3391 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 15:29:49,317 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:49,317 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 465 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-09-12 15:29:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 170. [2024-09-12 15:29:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:49,595 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:49,595 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:49,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.671641791044776) internal successors, (112), 67 states have internal predecessors, (112), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:49,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:49,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:49,596 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:49,608 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2024-09-12 15:29:49,796 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:49,797 INFO L399 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 511117750, now seen corresponding path program 98 times [2024-09-12 15:29:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929442174] [2024-09-12 15:29:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 332 proven. 107 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929442174] [2024-09-12 15:29:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929442174] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877370236] [2024-09-12 15:29:50,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:29:50,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:50,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:50,282 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:50,283 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2024-09-12 15:29:50,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:29:50,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:50,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:50,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:51,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:51,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877370236] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:51,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:51,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 66 [2024-09-12 15:29:51,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685515057] [2024-09-12 15:29:51,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:51,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-12 15:29:51,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-12 15:29:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3552, Unknown=0, NotChecked=0, Total=4290 [2024-09-12 15:29:51,539 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 66 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 66 states have internal predecessors, (111), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:29:53,344 INFO L93 Difference]: Finished difference Result 345 states and 395 transitions. [2024-09-12 15:29:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:29:53,344 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 66 states have internal predecessors, (111), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-12 15:29:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:29:53,346 INFO L225 Difference]: With dead ends: 345 [2024-09-12 15:29:53,346 INFO L226 Difference]: Without dead ends: 289 [2024-09-12 15:29:53,347 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 244 SyntacticMatches, 32 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=746, Invalid=3676, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 15:29:53,347 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:29:53,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 442 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:29:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-09-12 15:29:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 170. [2024-09-12 15:29:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:29:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-12 15:29:53,638 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-12 15:29:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:29:53,638 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-12 15:29:53,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 66 states have internal predecessors, (111), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:29:53,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-12 15:29:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-12 15:29:53,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:29:53,638 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:29:53,650 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2024-09-12 15:29:53,839 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:53,839 INFO L399 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:29:53,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:29:53,839 INFO L85 PathProgramCache]: Analyzing trace with hash -234057705, now seen corresponding path program 99 times [2024-09-12 15:29:53,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:29:53,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496435421] [2024-09-12 15:29:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:29:53,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:29:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:29:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:29:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 15:29:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:29:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 15:29:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:29:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:29:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 15:29:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 15:29:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 15:29:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:29:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:29:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-12 15:29:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:29:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-12 15:29:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-12 15:29:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:29:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 332 proven. 107 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:54,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:29:54,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496435421] [2024-09-12 15:29:54,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496435421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:29:54,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860101850] [2024-09-12 15:29:54,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:29:54,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:29:54,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:29:54,341 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:29:54,342 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2024-09-12 15:29:54,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-12 15:29:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:29:54,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:29:54,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:29:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:55,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:29:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-12 15:29:55,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860101850] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:29:55,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:29:55,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 65 [2024-09-12 15:29:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302070673] [2024-09-12 15:29:55,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:29:55,580 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-12 15:29:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:29:55,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-12 15:29:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 15:29:55,581 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 65 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 65 states have internal predecessors, (110), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32)