./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.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 5189fb62 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/nla-digbench-scaling/divbin_unwindbound5.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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --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-5189fb6-m [2024-09-13 00:05:42,252 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 00:05:42,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 00:05:42,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 00:05:42,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 00:05:42,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 00:05:42,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 00:05:42,361 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 00:05:42,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 00:05:42,363 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 00:05:42,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 00:05:42,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 00:05:42,364 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 00:05:42,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 00:05:42,368 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 00:05:42,369 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 00:05:42,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 00:05:42,369 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 00:05:42,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 00:05:42,370 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 00:05:42,370 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 00:05:42,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 00:05:42,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 00:05:42,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 00:05:42,371 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 00:05:42,371 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 00:05:42,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 00:05:42,372 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 00:05:42,372 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 00:05:42,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 00:05:42,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 00:05:42,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 00:05:42,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:05:42,373 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 00:05:42,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 00:05:42,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 00:05:42,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 00:05:42,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 00:05:42,376 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 00:05:42,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 00:05:42,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 00:05:42,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 00:05:42,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 00:05:42,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 00:05:42,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 00:05:42,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 00:05:42,756 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 00:05:42,757 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 00:05:42,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-13 00:05:44,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 00:05:44,440 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 00:05:44,441 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-13 00:05:44,451 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0976339ee/f6fa5327a50b4054875fe61592a1e52a/FLAG0caf0611f [2024-09-13 00:05:44,472 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0976339ee/f6fa5327a50b4054875fe61592a1e52a [2024-09-13 00:05:44,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 00:05:44,478 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 00:05:44,479 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 00:05:44,479 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 00:05:44,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 00:05:44,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca077a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44, skipping insertion in model container [2024-09-13 00:05:44,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,529 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 00:05:44,695 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/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2024-09-13 00:05:44,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:05:44,731 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 00:05:44,749 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/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2024-09-13 00:05:44,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:05:44,778 INFO L204 MainTranslator]: Completed translation [2024-09-13 00:05:44,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44 WrapperNode [2024-09-13 00:05:44,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 00:05:44,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 00:05:44,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 00:05:44,780 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 00:05:44,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,798 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 00:05:44,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 00:05:44,799 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 00:05:44,799 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 00:05:44,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 00:05:44,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,811 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,826 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]. [2024-09-13 00:05:44,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 00:05:44,842 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 00:05:44,842 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 00:05:44,842 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 00:05:44,843 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (1/1) ... [2024-09-13 00:05:44,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:05:44,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:05:44,889 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) [2024-09-13 00:05:44,900 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 [2024-09-13 00:05:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 00:05:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 00:05:44,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 00:05:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 00:05:44,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 00:05:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 00:05:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 00:05:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 00:05:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 00:05:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 00:05:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 00:05:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 00:05:45,007 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 00:05:45,009 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 00:05:45,221 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-13 00:05:45,221 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 00:05:45,250 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 00:05:45,253 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 00:05:45,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:05:45 BoogieIcfgContainer [2024-09-13 00:05:45,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 00:05:45,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 00:05:45,257 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 00:05:45,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 00:05:45,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 12:05:44" (1/3) ... [2024-09-13 00:05:45,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab75032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:05:45, skipping insertion in model container [2024-09-13 00:05:45,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:05:44" (2/3) ... [2024-09-13 00:05:45,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab75032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:05:45, skipping insertion in model container [2024-09-13 00:05:45,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:05:45" (3/3) ... [2024-09-13 00:05:45,301 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2024-09-13 00:05:45,318 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 00:05:45,318 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 00:05:45,386 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 00:05:45,394 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;@3799236f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 00:05:45,395 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 00:05:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 00:05:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 00:05:45,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:45,407 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:05:45,408 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:45,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1602480078, now seen corresponding path program 1 times [2024-09-13 00:05:45,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:45,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328389250] [2024-09-13 00:05:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:45,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:45,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:05:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:45,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:05:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:45,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 00:05:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:45,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:05:45,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328389250] [2024-09-13 00:05:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328389250] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:05:45,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:05:45,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 00:05:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94828404] [2024-09-13 00:05:45,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:05:45,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 00:05:45,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:05:45,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 00:05:45,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 00:05:45,664 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 00:05:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:05:45,773 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2024-09-13 00:05:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 00:05:45,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-13 00:05:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:05:45,783 INFO L225 Difference]: With dead ends: 57 [2024-09-13 00:05:45,783 INFO L226 Difference]: Without dead ends: 28 [2024-09-13 00:05:45,787 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 00:05:45,791 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:05:45,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:05:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-13 00:05:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-09-13 00:05:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 00:05:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-13 00:05:45,825 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2024-09-13 00:05:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:05:45,827 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-13 00:05:45,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 00:05:45,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-13 00:05:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 00:05:45,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:45,831 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] [2024-09-13 00:05:45,831 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 00:05:45,832 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:45,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash 610811680, now seen corresponding path program 1 times [2024-09-13 00:05:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:45,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105600758] [2024-09-13 00:05:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:45,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:05:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:05:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 00:05:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:05:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105600758] [2024-09-13 00:05:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105600758] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:05:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:05:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:05:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676983479] [2024-09-13 00:05:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:05:46,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:05:46,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:05:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:05:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:05:46,112 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 00:05:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:05:46,211 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-13 00:05:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:05:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-13 00:05:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:05:46,213 INFO L225 Difference]: With dead ends: 41 [2024-09-13 00:05:46,213 INFO L226 Difference]: Without dead ends: 29 [2024-09-13 00:05:46,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:05:46,215 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:05:46,215 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:05:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-13 00:05:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-13 00:05:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 00:05:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-13 00:05:46,228 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2024-09-13 00:05:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:05:46,229 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-13 00:05:46,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 00:05:46,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-13 00:05:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 00:05:46,233 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:46,234 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, 1] [2024-09-13 00:05:46,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 00:05:46,234 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:46,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:46,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1424295131, now seen corresponding path program 1 times [2024-09-13 00:05:46,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:46,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115078328] [2024-09-13 00:05:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:05:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:05:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 00:05:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:46,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:05:46,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115078328] [2024-09-13 00:05:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115078328] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:05:46,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:05:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-13 00:05:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107088632] [2024-09-13 00:05:46,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:05:46,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:05:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:05:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:05:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:05:46,480 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 00:05:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:05:46,593 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-09-13 00:05:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 00:05:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-13 00:05:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:05:46,596 INFO L225 Difference]: With dead ends: 40 [2024-09-13 00:05:46,596 INFO L226 Difference]: Without dead ends: 33 [2024-09-13 00:05:46,597 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:05:46,598 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:05:46,599 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:05:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-13 00:05:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-13 00:05:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 00:05:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-13 00:05:46,614 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2024-09-13 00:05:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:05:46,617 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-13 00:05:46,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 00:05:46,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-13 00:05:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 00:05:46,619 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:46,619 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, 1] [2024-09-13 00:05:46,619 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 00:05:46,619 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:46,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:46,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1426082591, now seen corresponding path program 1 times [2024-09-13 00:05:46,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:46,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817903019] [2024-09-13 00:05:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:46,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:05:46,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046457440] [2024-09-13 00:05:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:46,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:05:46,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:05:46,662 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) [2024-09-13 00:05:46,665 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 00:05:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:46,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:05:46,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:05:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:46,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:05:46,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:05:46,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817903019] [2024-09-13 00:05:46,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:05:46,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046457440] [2024-09-13 00:05:46,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046457440] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:05:46,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:05:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:05:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479874537] [2024-09-13 00:05:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:05:46,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:05:46,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:05:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:05:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:05:46,854 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 00:05:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:05:46,928 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-09-13 00:05:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:05:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-13 00:05:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:05:46,930 INFO L225 Difference]: With dead ends: 44 [2024-09-13 00:05:46,930 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 00:05:46,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:05:46,931 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:05:46,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 90 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:05:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 00:05:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-13 00:05:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 00:05:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-09-13 00:05:46,939 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2024-09-13 00:05:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:05:46,940 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-09-13 00:05:46,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 00:05:46,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-09-13 00:05:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 00:05:46,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:46,941 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:05:46,958 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 00:05:47,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:05:47,146 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:47,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1945714758, now seen corresponding path program 1 times [2024-09-13 00:05:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:47,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694109474] [2024-09-13 00:05:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:47,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:47,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:05:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:47,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:05:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:47,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 00:05:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:47,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:05:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:47,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:05:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694109474] [2024-09-13 00:05:47,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694109474] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:05:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961766773] [2024-09-13 00:05:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:47,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:05:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:05:47,331 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) [2024-09-13 00:05:47,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 00:05:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:47,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:05:47,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:05:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:47,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:05:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:47,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961766773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:05:47,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:05:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2024-09-13 00:05:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751946265] [2024-09-13 00:05:47,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:05:47,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 00:05:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:05:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 00:05:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-09-13 00:05:47,598 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-13 00:05:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:05:47,838 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2024-09-13 00:05:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:05:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 34 [2024-09-13 00:05:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:05:47,841 INFO L225 Difference]: With dead ends: 111 [2024-09-13 00:05:47,841 INFO L226 Difference]: Without dead ends: 104 [2024-09-13 00:05:47,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-13 00:05:47,842 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:05:47,843 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:05:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-13 00:05:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2024-09-13 00:05:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-13 00:05:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2024-09-13 00:05:47,864 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 34 [2024-09-13 00:05:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:05:47,864 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2024-09-13 00:05:47,864 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-13 00:05:47,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2024-09-13 00:05:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 00:05:47,866 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:47,866 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:05:47,886 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 00:05:48,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:05:48,071 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:48,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:48,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1947502218, now seen corresponding path program 1 times [2024-09-13 00:05:48,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:48,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411782183] [2024-09-13 00:05:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:48,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:05:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:05:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 00:05:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:05:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 00:05:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:05:48,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411782183] [2024-09-13 00:05:48,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411782183] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:05:48,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:05:48,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 00:05:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652192002] [2024-09-13 00:05:48,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:05:48,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 00:05:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:05:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 00:05:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 00:05:48,252 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 00:05:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:05:48,321 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2024-09-13 00:05:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:05:48,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-13 00:05:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:05:48,323 INFO L225 Difference]: With dead ends: 145 [2024-09-13 00:05:48,323 INFO L226 Difference]: Without dead ends: 75 [2024-09-13 00:05:48,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:05:48,324 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:05:48,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:05:48,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-13 00:05:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-13 00:05:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 58 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 00:05:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-09-13 00:05:48,343 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 34 [2024-09-13 00:05:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:05:48,343 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-09-13 00:05:48,343 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 00:05:48,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-09-13 00:05:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 00:05:48,344 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:48,344 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:05:48,344 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-13 00:05:48,345 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:48,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1464105851, now seen corresponding path program 1 times [2024-09-13 00:05:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:48,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377350175] [2024-09-13 00:05:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:48,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:05:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:05:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 00:05:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 00:05:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 00:05:48,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:05:48,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377350175] [2024-09-13 00:05:48,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377350175] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:05:48,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337222136] [2024-09-13 00:05:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:48,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:05:48,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:05:48,574 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) [2024-09-13 00:05:48,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 00:05:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:48,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:05:48,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:05:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 00:05:48,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:05:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 00:05:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337222136] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:05:48,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:05:48,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-13 00:05:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84044124] [2024-09-13 00:05:48,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:05:48,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:05:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:05:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:05:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-13 00:05:48,737 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-13 00:05:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:05:48,877 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2024-09-13 00:05:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 00:05:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 36 [2024-09-13 00:05:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:05:48,879 INFO L225 Difference]: With dead ends: 128 [2024-09-13 00:05:48,879 INFO L226 Difference]: Without dead ends: 77 [2024-09-13 00:05:48,879 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:05:48,880 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:05:48,880 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:05:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-13 00:05:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-13 00:05:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 60 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 00:05:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2024-09-13 00:05:48,906 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 36 [2024-09-13 00:05:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:05:48,906 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2024-09-13 00:05:48,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-13 00:05:48,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2024-09-13 00:05:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 00:05:48,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:05:48,908 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:05:48,926 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 00:05:49,109 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 00:05:49,110 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:05:49,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:05:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1516658666, now seen corresponding path program 1 times [2024-09-13 00:05:49,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:05:49,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001088850] [2024-09-13 00:05:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:49,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:05:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:05:49,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108509252] [2024-09-13 00:05:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:05:49,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:05:49,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:05:49,141 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) [2024-09-13 00:05:49,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 00:05:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:05:49,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 00:05:49,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:05:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 00:05:49,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:06:01,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:06:01,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001088850] [2024-09-13 00:06:01,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:06:01,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108509252] [2024-09-13 00:06:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108509252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:06:01,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:06:01,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-13 00:06:01,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229013658] [2024-09-13 00:06:01,839 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:06:01,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 00:06:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:06:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 00:06:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=101, Unknown=3, NotChecked=0, Total=132 [2024-09-13 00:06:01,841 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 00:06:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:06:01,957 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2024-09-13 00:06:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 00:06:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-13 00:06:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:06:01,959 INFO L225 Difference]: With dead ends: 90 [2024-09-13 00:06:01,959 INFO L226 Difference]: Without dead ends: 86 [2024-09-13 00:06:01,959 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=34, Invalid=119, Unknown=3, NotChecked=0, Total=156 [2024-09-13 00:06:01,960 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:06:01,960 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:06:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-13 00:06:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2024-09-13 00:06:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 58 states have internal predecessors, (68), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 00:06:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2024-09-13 00:06:01,973 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 37 [2024-09-13 00:06:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:06:01,974 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2024-09-13 00:06:01,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 00:06:01,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:06:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2024-09-13 00:06:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 00:06:01,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:06:01,976 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:06:01,988 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 00:06:02,176 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:06:02,177 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:06:02,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:06:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1803442657, now seen corresponding path program 2 times [2024-09-13 00:06:02,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:06:02,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337438603] [2024-09-13 00:06:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:06:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:06:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:06:02,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:06:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:06:02,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:06:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:06:02,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 00:06:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:06:02,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 00:06:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:06:02,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 00:06:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:06:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 00:06:02,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:06:02,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337438603] [2024-09-13 00:06:02,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337438603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:06:02,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681944802] [2024-09-13 00:06:02,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:06:02,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:06:02,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:06:02,852 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) [2024-09-13 00:06:02,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 00:06:02,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:06:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:06:02,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 00:06:02,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:06:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 00:06:03,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:06:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 00:06:05,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681944802] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:06:05,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:06:05,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 9] total 24 [2024-09-13 00:06:05,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442141873] [2024-09-13 00:06:05,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:06:05,174 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:06:05,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:06:05,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:06:05,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-13 00:06:05,175 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-13 00:06:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:06:10,206 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2024-09-13 00:06:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:06:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 46 [2024-09-13 00:06:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:06:10,208 INFO L225 Difference]: With dead ends: 118 [2024-09-13 00:06:10,208 INFO L226 Difference]: Without dead ends: 65 [2024-09-13 00:06:10,209 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=167, Invalid=888, Unknown=1, NotChecked=0, Total=1056 [2024-09-13 00:06:10,209 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:06:10,210 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 245 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:06:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-13 00:06:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2024-09-13 00:06:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 00:06:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-09-13 00:06:10,225 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 46 [2024-09-13 00:06:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:06:10,225 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-09-13 00:06:10,225 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-13 00:06:10,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:06:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-09-13 00:06:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 00:06:10,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:06:10,226 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:06:10,261 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 00:06:10,427 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:06:10,428 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:06:10,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:06:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash 182266171, now seen corresponding path program 1 times [2024-09-13 00:06:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:06:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796434967] [2024-09-13 00:06:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:06:10,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:06:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:06:10,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755032560] [2024-09-13 00:06:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:06:10,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:06:10,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:06:10,490 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) [2024-09-13 00:06:10,493 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 00:06:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:06:11,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 00:06:11,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:06:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 00:06:13,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:07:59,236 WARN L293 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:08:21,577 WARN L293 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:11:54,288 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:12:04,465 WARN L293 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:13:20,871 WARN L293 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:13:39,833 WARN L293 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:13:47,939 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:16:01,159 WARN L293 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:16:16,123 WARN L293 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:16:26,156 WARN L293 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:17:32,769 WARN L293 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:18:54,856 WARN L293 SmtUtils]: Spent 7.63s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:19:26,810 WARN L293 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:19:34,044 WARN L293 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:19:45,377 WARN L293 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15