./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/loops-crafted-1/in-de51.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:08:24,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:08:24,121 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:08:24,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:08:24,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:08:24,161 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:08:24,162 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:08:24,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:08:24,163 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:08:24,166 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:08:24,166 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:08:24,166 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:08:24,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:08:24,170 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:08:24,171 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:08:24,171 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:08:24,171 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:08:24,172 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:08:24,172 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:08:24,172 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:08:24,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:08:24,173 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:08:24,173 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:08:24,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:08:24,174 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:08:24,174 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:08:24,175 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:08:24,175 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:08:24,176 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:08:24,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:08:24,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:08:24,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:08:24,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:08:24,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:08:24,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:08:24,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:08:24,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:08:24,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:08:24,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:08:24,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:08:24,179 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:08:24,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:08:24,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:08:24,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:08:24,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:08:24,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:08:24,487 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:08:24,487 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:08:24,489 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de51.c [2024-09-24 23:08:25,936 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:08:26,126 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:08:26,126 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de51.c [2024-09-24 23:08:26,132 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4b82a81f5/2db2e8b1933b4ca2b310ba1e0136710b/FLAGe732fc7ae [2024-09-24 23:08:26,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4b82a81f5/2db2e8b1933b4ca2b310ba1e0136710b [2024-09-24 23:08:26,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:08:26,150 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:08:26,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:08:26,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:08:26,155 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:08:26,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe47731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26, skipping insertion in model container [2024-09-24 23:08:26,157 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,176 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:08:26,364 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2024-09-24 23:08:26,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:08:26,386 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:08:26,397 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2024-09-24 23:08:26,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:08:26,416 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:08:26,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26 WrapperNode [2024-09-24 23:08:26,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:08:26,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:08:26,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:08:26,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:08:26,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,445 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:08:26,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:08:26,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:08:26,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:08:26,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:08:26,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,460 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,479 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]. [2024-09-24 23:08:26,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,491 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,495 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:08:26,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:08:26,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:08:26,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:08:26,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (1/1) ... [2024-09-24 23:08:26,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:08:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:26,540 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) [2024-09-24 23:08:26,543 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 [2024-09-24 23:08:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:08:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:08:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:08:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:08:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:08:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:08:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:08:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:08:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:08:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:08:26,654 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:08:26,655 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:08:26,788 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-24 23:08:26,788 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:08:26,813 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:08:26,813 INFO L317 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-24 23:08:26,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:08:26 BoogieIcfgContainer [2024-09-24 23:08:26,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:08:26,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:08:26,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:08:26,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:08:26,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:08:26" (1/3) ... [2024-09-24 23:08:26,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1c7e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:08:26, skipping insertion in model container [2024-09-24 23:08:26,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:26" (2/3) ... [2024-09-24 23:08:26,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1c7e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:08:26, skipping insertion in model container [2024-09-24 23:08:26,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:08:26" (3/3) ... [2024-09-24 23:08:26,823 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de51.c [2024-09-24 23:08:26,837 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:08:26,837 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:08:26,884 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:08:26,890 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;@a62c90c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:08:26,890 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:08:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:08:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-24 23:08:26,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:26,900 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:26,901 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:26,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash -356520028, now seen corresponding path program 1 times [2024-09-24 23:08:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:26,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261262154] [2024-09-24 23:08:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:26,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:27,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261262154] [2024-09-24 23:08:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261262154] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:27,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:27,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:08:27,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368339482] [2024-09-24 23:08:27,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:27,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:08:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:08:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:08:27,130 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:27,159 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2024-09-24 23:08:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:08:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-24 23:08:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:27,169 INFO L225 Difference]: With dead ends: 38 [2024-09-24 23:08:27,170 INFO L226 Difference]: Without dead ends: 16 [2024-09-24 23:08:27,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:08:27,176 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:27,178 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-24 23:08:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-24 23:08:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-09-24 23:08:27,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2024-09-24 23:08:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:27,208 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-09-24 23:08:27,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-09-24 23:08:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-24 23:08:27,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:27,210 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:27,210 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:08:27,210 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:27,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash 315017388, now seen corresponding path program 1 times [2024-09-24 23:08:27,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:27,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671045709] [2024-09-24 23:08:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:27,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:27,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671045709] [2024-09-24 23:08:27,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671045709] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:27,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:08:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947136855] [2024-09-24 23:08:27,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:27,615 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:08:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:08:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:08:27,618 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:27,681 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2024-09-24 23:08:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:08:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-24 23:08:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:27,683 INFO L225 Difference]: With dead ends: 27 [2024-09-24 23:08:27,684 INFO L226 Difference]: Without dead ends: 22 [2024-09-24 23:08:27,684 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:08:27,685 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:27,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-24 23:08:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-24 23:08:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-09-24 23:08:27,699 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 15 [2024-09-24 23:08:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:27,700 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-09-24 23:08:27,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-09-24 23:08:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:27,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:27,702 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:27,703 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:08:27,703 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:27,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1680996671, now seen corresponding path program 1 times [2024-09-24 23:08:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:27,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120151250] [2024-09-24 23:08:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:27,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120151250] [2024-09-24 23:08:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120151250] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:27,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:27,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:08:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448714490] [2024-09-24 23:08:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:27,745 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:08:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:08:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:08:27,760 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:27,786 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2024-09-24 23:08:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:08:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-24 23:08:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:27,789 INFO L225 Difference]: With dead ends: 34 [2024-09-24 23:08:27,789 INFO L226 Difference]: Without dead ends: 27 [2024-09-24 23:08:27,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:08:27,791 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:27,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:27,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-24 23:08:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-09-24 23:08:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-09-24 23:08:27,802 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2024-09-24 23:08:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:27,802 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-09-24 23:08:27,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-09-24 23:08:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:27,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:27,807 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:27,807 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:08:27,807 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:27,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1211142226, now seen corresponding path program 1 times [2024-09-24 23:08:27,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:27,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737100298] [2024-09-24 23:08:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:27,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:27,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737100298] [2024-09-24 23:08:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737100298] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:27,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:27,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:08:27,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916265672] [2024-09-24 23:08:27,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:27,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:08:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:08:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:08:27,869 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:27,895 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2024-09-24 23:08:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:08:27,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-24 23:08:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:27,898 INFO L225 Difference]: With dead ends: 39 [2024-09-24 23:08:27,898 INFO L226 Difference]: Without dead ends: 31 [2024-09-24 23:08:27,899 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:08:27,900 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:27,903 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-24 23:08:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-24 23:08:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2024-09-24 23:08:27,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 16 [2024-09-24 23:08:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:27,914 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2024-09-24 23:08:27,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:27,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2024-09-24 23:08:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:27,918 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:27,918 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:27,918 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-24 23:08:27,918 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:27,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:27,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1644628767, now seen corresponding path program 1 times [2024-09-24 23:08:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:27,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092105194] [2024-09-24 23:08:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:27,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092105194] [2024-09-24 23:08:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092105194] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:27,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:27,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:08:27,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516737878] [2024-09-24 23:08:27,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:28,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:08:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:28,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:08:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:08:28,001 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:28,050 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2024-09-24 23:08:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 23:08:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-24 23:08:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:28,052 INFO L225 Difference]: With dead ends: 43 [2024-09-24 23:08:28,053 INFO L226 Difference]: Without dead ends: 25 [2024-09-24 23:08:28,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:08:28,054 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:28,054 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-24 23:08:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-24 23:08:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-09-24 23:08:28,059 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2024-09-24 23:08:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:28,060 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-09-24 23:08:28,060 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-09-24 23:08:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:28,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:28,061 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:28,061 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-24 23:08:28,062 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:28,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash -677262176, now seen corresponding path program 1 times [2024-09-24 23:08:28,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:28,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875172364] [2024-09-24 23:08:28,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:28,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:28,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:28,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:28,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875172364] [2024-09-24 23:08:28,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875172364] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792545257] [2024-09-24 23:08:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:28,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:28,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:28,150 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) [2024-09-24 23:08:28,152 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:08:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:28,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:08:28,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:28,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:28,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792545257] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:28,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:28,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-24 23:08:28,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147401038] [2024-09-24 23:08:28,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:28,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 23:08:28,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 23:08:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:08:28,308 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:28,466 INFO L93 Difference]: Finished difference Result 74 states and 113 transitions. [2024-09-24 23:08:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:08:28,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-24 23:08:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:28,469 INFO L225 Difference]: With dead ends: 74 [2024-09-24 23:08:28,470 INFO L226 Difference]: Without dead ends: 60 [2024-09-24 23:08:28,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:08:28,471 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:28,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 87 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-24 23:08:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2024-09-24 23:08:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2024-09-24 23:08:28,487 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 16 [2024-09-24 23:08:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:28,491 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2024-09-24 23:08:28,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:28,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2024-09-24 23:08:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-24 23:08:28,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:28,492 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:28,511 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:28,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:08:28,694 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:28,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1860399215, now seen corresponding path program 1 times [2024-09-24 23:08:28,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:28,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050175689] [2024-09-24 23:08:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:28,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:28,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:28,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050175689] [2024-09-24 23:08:28,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050175689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:28,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001229906] [2024-09-24 23:08:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:28,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:28,797 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) [2024-09-24 23:08:28,799 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:08:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:28,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:08:28,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:28,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001229906] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:28,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:28,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-24 23:08:28,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55568268] [2024-09-24 23:08:28,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:28,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:08:28,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:08:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:08:28,993 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:29,417 INFO L93 Difference]: Finished difference Result 91 states and 140 transitions. [2024-09-24 23:08:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:08:29,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-24 23:08:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:29,419 INFO L225 Difference]: With dead ends: 91 [2024-09-24 23:08:29,419 INFO L226 Difference]: Without dead ends: 81 [2024-09-24 23:08:29,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2024-09-24 23:08:29,420 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:29,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 97 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-24 23:08:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 44. [2024-09-24 23:08:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-24 23:08:29,440 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 18 [2024-09-24 23:08:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:29,440 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-24 23:08:29,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:29,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-24 23:08:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:08:29,443 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:29,443 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:29,459 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:08:29,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-24 23:08:29,648 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:29,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263027, now seen corresponding path program 1 times [2024-09-24 23:08:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:29,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913361664] [2024-09-24 23:08:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:29,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:29,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:29,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913361664] [2024-09-24 23:08:29,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913361664] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:29,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908811090] [2024-09-24 23:08:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:29,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:29,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:29,733 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) [2024-09-24 23:08:29,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:08:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:29,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 23:08:29,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:29,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:29,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908811090] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:29,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-09-24 23:08:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188761237] [2024-09-24 23:08:29,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:29,851 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:08:29,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:08:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:08:29,852 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:29,894 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2024-09-24 23:08:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 23:08:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-24 23:08:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:29,895 INFO L225 Difference]: With dead ends: 71 [2024-09-24 23:08:29,895 INFO L226 Difference]: Without dead ends: 62 [2024-09-24 23:08:29,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:08:29,896 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:29,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-24 23:08:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2024-09-24 23:08:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.469387755102041) internal successors, (72), 49 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2024-09-24 23:08:29,910 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 19 [2024-09-24 23:08:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:29,911 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2024-09-24 23:08:29,911 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:29,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2024-09-24 23:08:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:08:29,912 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:29,912 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:29,928 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:08:30,112 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-24 23:08:30,113 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:30,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash -211671636, now seen corresponding path program 2 times [2024-09-24 23:08:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:30,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265036239] [2024-09-24 23:08:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:30,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:30,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:30,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265036239] [2024-09-24 23:08:30,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265036239] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:30,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197535876] [2024-09-24 23:08:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:30,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:30,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:30,212 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) [2024-09-24 23:08:30,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:08:30,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:30,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:08:30,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:30,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:30,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197535876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:30,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:30,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-24 23:08:30,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808324779] [2024-09-24 23:08:30,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:30,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:08:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:08:30,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:08:30,374 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:31,084 INFO L93 Difference]: Finished difference Result 224 states and 356 transitions. [2024-09-24 23:08:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-24 23:08:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-24 23:08:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:31,088 INFO L225 Difference]: With dead ends: 224 [2024-09-24 23:08:31,089 INFO L226 Difference]: Without dead ends: 200 [2024-09-24 23:08:31,089 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:08:31,090 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 226 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:31,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 270 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:08:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-09-24 23:08:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 81. [2024-09-24 23:08:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 76 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2024-09-24 23:08:31,127 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 19 [2024-09-24 23:08:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:31,127 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2024-09-24 23:08:31,127 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:31,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2024-09-24 23:08:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-24 23:08:31,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:31,129 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:31,147 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:31,329 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:31,329 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:31,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash 537966210, now seen corresponding path program 1 times [2024-09-24 23:08:31,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:31,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335267692] [2024-09-24 23:08:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:31,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:31,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:31,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:31,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335267692] [2024-09-24 23:08:31,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335267692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:31,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737675408] [2024-09-24 23:08:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:31,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:31,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:31,619 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) [2024-09-24 23:08:31,621 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:08:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:31,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-24 23:08:31,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:31,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:31,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737675408] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:31,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:31,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2024-09-24 23:08:31,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049416375] [2024-09-24 23:08:31,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:31,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-24 23:08:31,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:31,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-24 23:08:31,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-09-24 23:08:31,886 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:32,003 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2024-09-24 23:08:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:08:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-24 23:08:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:32,004 INFO L225 Difference]: With dead ends: 95 [2024-09-24 23:08:32,004 INFO L226 Difference]: Without dead ends: 75 [2024-09-24 23:08:32,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:08:32,005 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:32,006 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-24 23:08:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-09-24 23:08:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 68 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 104 transitions. [2024-09-24 23:08:32,028 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 104 transitions. Word has length 20 [2024-09-24 23:08:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:32,028 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 104 transitions. [2024-09-24 23:08:32,029 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:32,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 104 transitions. [2024-09-24 23:08:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-24 23:08:32,030 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:32,030 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:32,046 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-24 23:08:32,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-24 23:08:32,235 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:32,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:32,235 INFO L85 PathProgramCache]: Analyzing trace with hash 548739116, now seen corresponding path program 1 times [2024-09-24 23:08:32,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:32,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907696729] [2024-09-24 23:08:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:32,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:32,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:32,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:32,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907696729] [2024-09-24 23:08:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907696729] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:32,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954394116] [2024-09-24 23:08:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:32,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:32,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:32,321 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) [2024-09-24 23:08:32,323 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:08:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:32,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:08:32,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:32,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:32,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954394116] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:32,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:32,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-24 23:08:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483370618] [2024-09-24 23:08:32,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:32,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-24 23:08:32,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-24 23:08:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:08:32,475 INFO L87 Difference]: Start difference. First operand 73 states and 104 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:32,695 INFO L93 Difference]: Finished difference Result 115 states and 164 transitions. [2024-09-24 23:08:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:08:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-24 23:08:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:32,696 INFO L225 Difference]: With dead ends: 115 [2024-09-24 23:08:32,697 INFO L226 Difference]: Without dead ends: 95 [2024-09-24 23:08:32,697 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:08:32,698 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:32,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 118 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-24 23:08:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2024-09-24 23:08:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2024-09-24 23:08:32,727 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 21 [2024-09-24 23:08:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:32,727 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2024-09-24 23:08:32,727 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:32,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2024-09-24 23:08:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-24 23:08:32,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:32,728 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:32,745 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:08:32,929 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-24 23:08:32,929 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:32,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash 47519372, now seen corresponding path program 2 times [2024-09-24 23:08:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354929183] [2024-09-24 23:08:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:32,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:33,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:33,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:33,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354929183] [2024-09-24 23:08:33,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354929183] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:33,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460629408] [2024-09-24 23:08:33,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:33,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:33,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:33,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:33,041 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:08:33,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:33,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:33,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 23:08:33,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:33,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460629408] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:33,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:33,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-24 23:08:33,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694192212] [2024-09-24 23:08:33,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:33,212 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:08:33,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:08:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:08:33,213 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:33,647 INFO L93 Difference]: Finished difference Result 125 states and 185 transitions. [2024-09-24 23:08:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-24 23:08:33,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-24 23:08:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:33,649 INFO L225 Difference]: With dead ends: 125 [2024-09-24 23:08:33,649 INFO L226 Difference]: Without dead ends: 111 [2024-09-24 23:08:33,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:08:33,651 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:33,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 151 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-24 23:08:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2024-09-24 23:08:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2024-09-24 23:08:33,704 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 21 [2024-09-24 23:08:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:33,705 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2024-09-24 23:08:33,705 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:33,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2024-09-24 23:08:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-24 23:08:33,706 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:33,706 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:33,723 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 23:08:33,907 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:33,907 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:33,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1261948831, now seen corresponding path program 2 times [2024-09-24 23:08:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:33,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513515393] [2024-09-24 23:08:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:33,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:34,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 23:08:34,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513515393] [2024-09-24 23:08:34,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513515393] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050156214] [2024-09-24 23:08:34,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:34,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:34,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:34,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:34,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:08:34,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:34,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:34,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:08:34,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:34,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:34,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050156214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:34,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-09-24 23:08:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733049884] [2024-09-24 23:08:34,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:34,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-24 23:08:34,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-24 23:08:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:08:34,185 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:34,326 INFO L93 Difference]: Finished difference Result 176 states and 262 transitions. [2024-09-24 23:08:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:08:34,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-24 23:08:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:34,328 INFO L225 Difference]: With dead ends: 176 [2024-09-24 23:08:34,328 INFO L226 Difference]: Without dead ends: 162 [2024-09-24 23:08:34,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:08:34,329 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:34,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 91 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-24 23:08:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2024-09-24 23:08:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.432) internal successors, (179), 125 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 183 transitions. [2024-09-24 23:08:34,368 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 183 transitions. Word has length 24 [2024-09-24 23:08:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:34,368 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 183 transitions. [2024-09-24 23:08:34,369 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:34,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 183 transitions. [2024-09-24 23:08:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-24 23:08:34,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:34,370 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:34,386 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-24 23:08:34,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:34,571 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:34,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:34,571 INFO L85 PathProgramCache]: Analyzing trace with hash 453474690, now seen corresponding path program 3 times [2024-09-24 23:08:34,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:34,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469076990] [2024-09-24 23:08:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:34,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:34,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:34,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469076990] [2024-09-24 23:08:34,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469076990] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:34,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635681251] [2024-09-24 23:08:34,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:34,702 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:34,703 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:08:34,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:08:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:34,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-24 23:08:34,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:34,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:34,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635681251] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:34,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:34,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-24 23:08:34,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041171274] [2024-09-24 23:08:34,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:34,940 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-24 23:08:34,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-24 23:08:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:08:34,942 INFO L87 Difference]: Start difference. First operand 130 states and 183 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:36,833 INFO L93 Difference]: Finished difference Result 373 states and 573 transitions. [2024-09-24 23:08:36,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-24 23:08:36,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-24 23:08:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:36,835 INFO L225 Difference]: With dead ends: 373 [2024-09-24 23:08:36,835 INFO L226 Difference]: Without dead ends: 326 [2024-09-24 23:08:36,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2024-09-24 23:08:36,838 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 362 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:36,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 399 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:08:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-09-24 23:08:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 160. [2024-09-24 23:08:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.4387096774193548) internal successors, (223), 155 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 227 transitions. [2024-09-24 23:08:36,878 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 227 transitions. Word has length 24 [2024-09-24 23:08:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:36,879 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 227 transitions. [2024-09-24 23:08:36,879 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:36,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 227 transitions. [2024-09-24 23:08:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:08:36,880 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:36,880 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] [2024-09-24 23:08:36,897 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 23:08:37,080 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:08:37,081 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:37,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -931809812, now seen corresponding path program 4 times [2024-09-24 23:08:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766821136] [2024-09-24 23:08:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:37,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:37,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766821136] [2024-09-24 23:08:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766821136] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839123427] [2024-09-24 23:08:37,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:08:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:37,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:37,484 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:08:37,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:08:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:37,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-24 23:08:37,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:37,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:37,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839123427] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:37,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:37,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 16 [2024-09-24 23:08:37,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043336664] [2024-09-24 23:08:37,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:37,683 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:08:37,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:08:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:08:37,684 INFO L87 Difference]: Start difference. First operand 160 states and 227 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:37,837 INFO L93 Difference]: Finished difference Result 166 states and 232 transitions. [2024-09-24 23:08:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:08:37,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-24 23:08:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:37,839 INFO L225 Difference]: With dead ends: 166 [2024-09-24 23:08:37,839 INFO L226 Difference]: Without dead ends: 148 [2024-09-24 23:08:37,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:08:37,840 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:37,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:37,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-24 23:08:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-09-24 23:08:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.4685314685314685) internal successors, (210), 143 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 214 transitions. [2024-09-24 23:08:37,894 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 214 transitions. Word has length 25 [2024-09-24 23:08:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:37,895 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 214 transitions. [2024-09-24 23:08:37,895 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:37,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 214 transitions. [2024-09-24 23:08:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:08:37,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:37,896 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:37,913 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-24 23:08:38,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:08:38,101 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:38,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1117230082, now seen corresponding path program 2 times [2024-09-24 23:08:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:38,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419139580] [2024-09-24 23:08:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:38,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:38,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:38,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419139580] [2024-09-24 23:08:38,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419139580] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:38,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376117057] [2024-09-24 23:08:38,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:38,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:38,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:38,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:38,209 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:08:38,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:38,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:38,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-24 23:08:38,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:38,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376117057] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:38,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:38,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2024-09-24 23:08:38,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443592403] [2024-09-24 23:08:38,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:38,410 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:08:38,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:08:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:08:38,411 INFO L87 Difference]: Start difference. First operand 148 states and 214 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:38,743 INFO L93 Difference]: Finished difference Result 223 states and 312 transitions. [2024-09-24 23:08:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-24 23:08:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-24 23:08:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:38,745 INFO L225 Difference]: With dead ends: 223 [2024-09-24 23:08:38,745 INFO L226 Difference]: Without dead ends: 189 [2024-09-24 23:08:38,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:08:38,746 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:38,746 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 216 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-09-24 23:08:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 138. [2024-09-24 23:08:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.4511278195488722) internal successors, (193), 133 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 197 transitions. [2024-09-24 23:08:38,790 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 197 transitions. Word has length 25 [2024-09-24 23:08:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:38,790 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 197 transitions. [2024-09-24 23:08:38,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:38,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 197 transitions. [2024-09-24 23:08:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:08:38,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:38,791 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:38,803 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-24 23:08:38,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:08:38,992 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:38,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1301171089, now seen corresponding path program 3 times [2024-09-24 23:08:38,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:38,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342058719] [2024-09-24 23:08:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:38,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:39,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:39,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342058719] [2024-09-24 23:08:39,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342058719] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221685784] [2024-09-24 23:08:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:39,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:39,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:39,137 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 23:08:39,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:08:39,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:39,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:08:39,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:39,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221685784] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:39,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:39,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-24 23:08:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949242798] [2024-09-24 23:08:39,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:39,365 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:08:39,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:08:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:08:39,366 INFO L87 Difference]: Start difference. First operand 138 states and 197 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:39,852 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2024-09-24 23:08:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-24 23:08:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-24 23:08:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:39,853 INFO L225 Difference]: With dead ends: 202 [2024-09-24 23:08:39,853 INFO L226 Difference]: Without dead ends: 186 [2024-09-24 23:08:39,854 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2024-09-24 23:08:39,855 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:39,855 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 188 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-24 23:08:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 160. [2024-09-24 23:08:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.4064516129032258) internal successors, (218), 155 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 222 transitions. [2024-09-24 23:08:39,897 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 222 transitions. Word has length 26 [2024-09-24 23:08:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:39,897 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 222 transitions. [2024-09-24 23:08:39,897 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:39,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:39,898 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 222 transitions. [2024-09-24 23:08:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:08:39,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:39,898 INFO L216 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:39,914 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:40,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-24 23:08:40,103 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:40,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2140232672, now seen corresponding path program 3 times [2024-09-24 23:08:40,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:40,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663340200] [2024-09-24 23:08:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:40,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:40,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:40,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663340200] [2024-09-24 23:08:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663340200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:40,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329415240] [2024-09-24 23:08:40,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:40,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:40,300 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:40,301 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 23:08:40,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-24 23:08:40,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:40,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-24 23:08:40,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:40,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:40,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329415240] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:40,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:40,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-24 23:08:40,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582746906] [2024-09-24 23:08:40,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:40,652 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-24 23:08:40,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-24 23:08:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-09-24 23:08:40,653 INFO L87 Difference]: Start difference. First operand 160 states and 222 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:44,401 INFO L93 Difference]: Finished difference Result 841 states and 1299 transitions. [2024-09-24 23:08:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-24 23:08:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-24 23:08:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:44,406 INFO L225 Difference]: With dead ends: 841 [2024-09-24 23:08:44,406 INFO L226 Difference]: Without dead ends: 791 [2024-09-24 23:08:44,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1575, Invalid=3537, Unknown=0, NotChecked=0, Total=5112 [2024-09-24 23:08:44,409 INFO L434 NwaCegarLoop]: 73 mSDtfsCounter, 1361 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:44,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 989 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-24 23:08:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2024-09-24 23:08:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 227. [2024-09-24 23:08:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4009009009009008) internal successors, (311), 222 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 315 transitions. [2024-09-24 23:08:44,505 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 315 transitions. Word has length 26 [2024-09-24 23:08:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:44,505 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 315 transitions. [2024-09-24 23:08:44,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:44,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 315 transitions. [2024-09-24 23:08:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 23:08:44,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:44,507 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:44,519 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:44,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-24 23:08:44,707 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:44,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1872800161, now seen corresponding path program 3 times [2024-09-24 23:08:44,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:44,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593334045] [2024-09-24 23:08:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:44,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:44,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-24 23:08:44,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593334045] [2024-09-24 23:08:44,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593334045] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499455625] [2024-09-24 23:08:44,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:44,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:44,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:44,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-24 23:08:44,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:08:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:44,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-24 23:08:44,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-24 23:08:44,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-24 23:08:45,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499455625] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:45,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:45,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 22 [2024-09-24 23:08:45,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756160567] [2024-09-24 23:08:45,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:45,078 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-24 23:08:45,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:45,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-24 23:08:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:08:45,079 INFO L87 Difference]: Start difference. First operand 227 states and 315 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:45,890 INFO L93 Difference]: Finished difference Result 594 states and 780 transitions. [2024-09-24 23:08:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-24 23:08:45,890 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-24 23:08:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:45,893 INFO L225 Difference]: With dead ends: 594 [2024-09-24 23:08:45,893 INFO L226 Difference]: Without dead ends: 566 [2024-09-24 23:08:45,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=533, Invalid=1819, Unknown=0, NotChecked=0, Total=2352 [2024-09-24 23:08:45,894 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:45,895 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 297 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:08:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-09-24 23:08:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 331. [2024-09-24 23:08:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.4049079754601228) internal successors, (458), 326 states have internal predecessors, (458), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 462 transitions. [2024-09-24 23:08:46,043 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 462 transitions. Word has length 28 [2024-09-24 23:08:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:46,044 INFO L474 AbstractCegarLoop]: Abstraction has 331 states and 462 transitions. [2024-09-24 23:08:46,044 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:46,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 462 transitions. [2024-09-24 23:08:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-24 23:08:46,045 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:46,045 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:46,063 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-24 23:08:46,246 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:46,246 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:46,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash 398019010, now seen corresponding path program 5 times [2024-09-24 23:08:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879921859] [2024-09-24 23:08:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:08:46,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879921859] [2024-09-24 23:08:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879921859] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495726391] [2024-09-24 23:08:46,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:08:46,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:46,647 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:46,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-24 23:08:46,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-24 23:08:46,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:46,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:08:46,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:08:46,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:08:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495726391] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:46,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:46,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2024-09-24 23:08:46,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842099822] [2024-09-24 23:08:46,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:46,912 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:08:46,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:46,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:08:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:08:46,913 INFO L87 Difference]: Start difference. First operand 331 states and 462 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:50,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:08:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:51,192 INFO L93 Difference]: Finished difference Result 344 states and 475 transitions. [2024-09-24 23:08:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 23:08:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-24 23:08:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:51,194 INFO L225 Difference]: With dead ends: 344 [2024-09-24 23:08:51,194 INFO L226 Difference]: Without dead ends: 335 [2024-09-24 23:08:51,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:08:51,195 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:51,195 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-24 23:08:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-09-24 23:08:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2024-09-24 23:08:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.4036697247706422) internal successors, (459), 327 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 463 transitions. [2024-09-24 23:08:51,350 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 463 transitions. Word has length 30 [2024-09-24 23:08:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:51,350 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 463 transitions. [2024-09-24 23:08:51,350 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:51,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 463 transitions. [2024-09-24 23:08:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:08:51,351 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:51,351 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:51,363 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:51,551 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:51,551 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:51,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1118269741, now seen corresponding path program 6 times [2024-09-24 23:08:51,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:51,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224705982] [2024-09-24 23:08:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:51,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:51,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:08:51,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224705982] [2024-09-24 23:08:51,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224705982] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:51,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038004433] [2024-09-24 23:08:51,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:08:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:51,666 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:51,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-24 23:08:51,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-24 23:08:51,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:51,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:08:51,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:08:51,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:08:51,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038004433] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:51,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:51,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-24 23:08:51,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469543861] [2024-09-24 23:08:51,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:51,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:08:51,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:08:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:08:51,833 INFO L87 Difference]: Start difference. First operand 332 states and 463 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:52,065 INFO L93 Difference]: Finished difference Result 393 states and 542 transitions. [2024-09-24 23:08:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:08:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-24 23:08:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:52,067 INFO L225 Difference]: With dead ends: 393 [2024-09-24 23:08:52,067 INFO L226 Difference]: Without dead ends: 361 [2024-09-24 23:08:52,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:08:52,068 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:52,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 125 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:52,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-09-24 23:08:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 333. [2024-09-24 23:08:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.399390243902439) internal successors, (459), 328 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 463 transitions. [2024-09-24 23:08:52,209 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 463 transitions. Word has length 31 [2024-09-24 23:08:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:52,209 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 463 transitions. [2024-09-24 23:08:52,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:52,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 463 transitions. [2024-09-24 23:08:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:08:52,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:52,210 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:52,223 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-24 23:08:52,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:52,411 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:52,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:52,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1904854835, now seen corresponding path program 2 times [2024-09-24 23:08:52,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:52,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239985125] [2024-09-24 23:08:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:52,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:52,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239985125] [2024-09-24 23:08:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239985125] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588582673] [2024-09-24 23:08:52,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:52,637 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:52,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-24 23:08:52,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:52,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:52,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-24 23:08:52,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:52,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 23:08:52,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588582673] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:52,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:52,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 21 [2024-09-24 23:08:52,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489825602] [2024-09-24 23:08:52,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:52,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:08:52,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:52,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:08:52,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:08:52,882 INFO L87 Difference]: Start difference. First operand 333 states and 463 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:54,211 INFO L93 Difference]: Finished difference Result 556 states and 735 transitions. [2024-09-24 23:08:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-24 23:08:54,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-24 23:08:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:54,215 INFO L225 Difference]: With dead ends: 556 [2024-09-24 23:08:54,215 INFO L226 Difference]: Without dead ends: 533 [2024-09-24 23:08:54,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=811, Invalid=3221, Unknown=0, NotChecked=0, Total=4032 [2024-09-24 23:08:54,221 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:54,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 322 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:08:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-09-24 23:08:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 351. [2024-09-24 23:08:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.3815028901734103) internal successors, (478), 346 states have internal predecessors, (478), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 482 transitions. [2024-09-24 23:08:54,442 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 482 transitions. Word has length 31 [2024-09-24 23:08:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:54,442 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 482 transitions. [2024-09-24 23:08:54,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:54,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 482 transitions. [2024-09-24 23:08:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:08:54,445 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:54,445 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:54,462 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-24 23:08:54,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:54,650 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:54,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1643388018, now seen corresponding path program 7 times [2024-09-24 23:08:54,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:54,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026774957] [2024-09-24 23:08:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:54,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:54,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:54,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026774957] [2024-09-24 23:08:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026774957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:54,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34477018] [2024-09-24 23:08:54,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:08:54,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:54,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:54,880 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:54,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-24 23:08:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:54,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-24 23:08:54,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:54,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34477018] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:55,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:55,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-24 23:08:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873579074] [2024-09-24 23:08:55,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:55,295 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-24 23:08:55,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-24 23:08:55,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 23:08:55,296 INFO L87 Difference]: Start difference. First operand 351 states and 482 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:05,935 INFO L93 Difference]: Finished difference Result 1398 states and 2123 transitions. [2024-09-24 23:09:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2024-09-24 23:09:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-24 23:09:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:05,941 INFO L225 Difference]: With dead ends: 1398 [2024-09-24 23:09:05,941 INFO L226 Difference]: Without dead ends: 1291 [2024-09-24 23:09:05,945 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7001 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5082, Invalid=13550, Unknown=0, NotChecked=0, Total=18632 [2024-09-24 23:09:05,946 INFO L434 NwaCegarLoop]: 81 mSDtfsCounter, 1326 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:05,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 1314 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-24 23:09:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2024-09-24 23:09:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 382. [2024-09-24 23:09:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.389920424403183) internal successors, (524), 377 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 528 transitions. [2024-09-24 23:09:06,179 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 528 transitions. Word has length 31 [2024-09-24 23:09:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:06,179 INFO L474 AbstractCegarLoop]: Abstraction has 382 states and 528 transitions. [2024-09-24 23:09:06,180 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:06,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 528 transitions. [2024-09-24 23:09:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:09:06,181 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:06,181 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:06,197 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-24 23:09:06,381 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-24 23:09:06,382 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:06,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:06,382 INFO L85 PathProgramCache]: Analyzing trace with hash -737150836, now seen corresponding path program 8 times [2024-09-24 23:09:06,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:06,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488452080] [2024-09-24 23:09:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:06,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:06,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:09:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488452080] [2024-09-24 23:09:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488452080] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659484378] [2024-09-24 23:09:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:09:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:06,598 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:06,600 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-24 23:09:06,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:09:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:06,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-24 23:09:06,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-24 23:09:06,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-24 23:09:06,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659484378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:06,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:06,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-24 23:09:06,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468232190] [2024-09-24 23:09:06,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:06,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-24 23:09:06,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-24 23:09:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-24 23:09:06,919 INFO L87 Difference]: Start difference. First operand 382 states and 528 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:11,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:09:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:11,796 INFO L93 Difference]: Finished difference Result 741 states and 1098 transitions. [2024-09-24 23:09:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:09:11,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-24 23:09:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:11,800 INFO L225 Difference]: With dead ends: 741 [2024-09-24 23:09:11,800 INFO L226 Difference]: Without dead ends: 719 [2024-09-24 23:09:11,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:09:11,801 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:11,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 161 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 94 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-24 23:09:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2024-09-24 23:09:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 529. [2024-09-24 23:09:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.4312977099236641) internal successors, (750), 524 states have internal predecessors, (750), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 754 transitions. [2024-09-24 23:09:12,119 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 754 transitions. Word has length 33 [2024-09-24 23:09:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:12,120 INFO L474 AbstractCegarLoop]: Abstraction has 529 states and 754 transitions. [2024-09-24 23:09:12,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:12,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 754 transitions. [2024-09-24 23:09:12,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-24 23:09:12,121 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:12,121 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:12,137 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-24 23:09:12,325 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-24 23:09:12,326 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:12,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:12,326 INFO L85 PathProgramCache]: Analyzing trace with hash 434530706, now seen corresponding path program 9 times [2024-09-24 23:09:12,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:12,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879965894] [2024-09-24 23:09:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:12,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:12,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-24 23:09:12,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:12,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879965894] [2024-09-24 23:09:12,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879965894] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:12,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532749789] [2024-09-24 23:09:12,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:09:12,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:12,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:12,498 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:12,500 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-24 23:09:12,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:09:12,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:12,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-24 23:09:12,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-24 23:09:12,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-24 23:09:12,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532749789] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:12,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:12,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 25 [2024-09-24 23:09:12,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908577589] [2024-09-24 23:09:12,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:12,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-24 23:09:12,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-24 23:09:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:09:12,863 INFO L87 Difference]: Start difference. First operand 529 states and 754 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:14,252 INFO L93 Difference]: Finished difference Result 805 states and 1088 transitions. [2024-09-24 23:09:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-24 23:09:14,252 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-24 23:09:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:14,255 INFO L225 Difference]: With dead ends: 805 [2024-09-24 23:09:14,255 INFO L226 Difference]: Without dead ends: 703 [2024-09-24 23:09:14,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2024-09-24 23:09:14,256 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:14,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 494 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:09:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-09-24 23:09:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 497. [2024-09-24 23:09:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 492 states have (on average 1.4166666666666667) internal successors, (697), 492 states have internal predecessors, (697), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 701 transitions. [2024-09-24 23:09:14,554 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 701 transitions. Word has length 34 [2024-09-24 23:09:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:14,554 INFO L474 AbstractCegarLoop]: Abstraction has 497 states and 701 transitions. [2024-09-24 23:09:14,554 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:14,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 701 transitions. [2024-09-24 23:09:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-24 23:09:14,556 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:14,556 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:14,568 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-24 23:09:14,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-24 23:09:14,758 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:14,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:14,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1785638100, now seen corresponding path program 10 times [2024-09-24 23:09:14,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588404050] [2024-09-24 23:09:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:14,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:15,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-24 23:09:15,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588404050] [2024-09-24 23:09:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588404050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806797946] [2024-09-24 23:09:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:09:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:15,311 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:15,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-24 23:09:15,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:09:15,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:15,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-24 23:09:15,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-24 23:09:15,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-24 23:09:15,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806797946] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:15,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:15,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 24 [2024-09-24 23:09:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808319704] [2024-09-24 23:09:15,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:15,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:09:15,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:09:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:09:15,787 INFO L87 Difference]: Start difference. First operand 497 states and 701 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:16,240 INFO L93 Difference]: Finished difference Result 512 states and 715 transitions. [2024-09-24 23:09:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:09:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-24 23:09:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:16,242 INFO L225 Difference]: With dead ends: 512 [2024-09-24 23:09:16,242 INFO L226 Difference]: Without dead ends: 486 [2024-09-24 23:09:16,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:09:16,243 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:16,243 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:09:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2024-09-24 23:09:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2024-09-24 23:09:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.4241164241164241) internal successors, (685), 481 states have internal predecessors, (685), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 689 transitions. [2024-09-24 23:09:16,636 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 689 transitions. Word has length 35 [2024-09-24 23:09:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:16,636 INFO L474 AbstractCegarLoop]: Abstraction has 486 states and 689 transitions. [2024-09-24 23:09:16,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:16,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 689 transitions. [2024-09-24 23:09:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:09:16,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:16,638 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:16,654 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:16,842 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-24 23:09:16,842 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:16,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1273319442, now seen corresponding path program 3 times [2024-09-24 23:09:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:16,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161534602] [2024-09-24 23:09:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:17,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-24 23:09:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161534602] [2024-09-24 23:09:17,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161534602] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918853655] [2024-09-24 23:09:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:09:17,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:17,076 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:17,077 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-24 23:09:17,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:09:17,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:17,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-24 23:09:17,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-24 23:09:17,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-24 23:09:17,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918853655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:17,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:17,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-24 23:09:17,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339527843] [2024-09-24 23:09:17,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:17,576 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:09:17,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:09:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:09:17,577 INFO L87 Difference]: Start difference. First operand 486 states and 689 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:19,854 INFO L93 Difference]: Finished difference Result 939 states and 1257 transitions. [2024-09-24 23:09:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-24 23:09:19,854 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-24 23:09:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:19,858 INFO L225 Difference]: With dead ends: 939 [2024-09-24 23:09:19,858 INFO L226 Difference]: Without dead ends: 901 [2024-09-24 23:09:19,860 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1414, Invalid=5228, Unknown=0, NotChecked=0, Total=6642 [2024-09-24 23:09:19,860 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 280 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:19,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 495 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:09:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2024-09-24 23:09:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 485. [2024-09-24 23:09:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.4833333333333334) internal successors, (712), 480 states have internal predecessors, (712), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 716 transitions. [2024-09-24 23:09:20,234 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 716 transitions. Word has length 36 [2024-09-24 23:09:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:20,234 INFO L474 AbstractCegarLoop]: Abstraction has 485 states and 716 transitions. [2024-09-24 23:09:20,235 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:20,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 716 transitions. [2024-09-24 23:09:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:09:20,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:20,236 INFO L216 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:20,252 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-24 23:09:20,436 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-24 23:09:20,436 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:20,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1377251232, now seen corresponding path program 11 times [2024-09-24 23:09:20,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:20,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358376758] [2024-09-24 23:09:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:20,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:20,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:09:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358376758] [2024-09-24 23:09:20,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358376758] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873617971] [2024-09-24 23:09:20,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:09:20,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:20,711 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:20,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-24 23:09:20,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-24 23:09:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:20,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-24 23:09:20,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:09:20,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:09:21,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873617971] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:21,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:21,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-24 23:09:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529177863] [2024-09-24 23:09:21,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:21,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-24 23:09:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-24 23:09:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2024-09-24 23:09:21,308 INFO L87 Difference]: Start difference. First operand 485 states and 716 transitions. Second operand has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:44,847 INFO L93 Difference]: Finished difference Result 1988 states and 2995 transitions. [2024-09-24 23:09:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2024-09-24 23:09:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-24 23:09:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:44,852 INFO L225 Difference]: With dead ends: 1988 [2024-09-24 23:09:44,852 INFO L226 Difference]: Without dead ends: 1785 [2024-09-24 23:09:44,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19625 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=11169, Invalid=37451, Unknown=0, NotChecked=0, Total=48620 [2024-09-24 23:09:44,857 INFO L434 NwaCegarLoop]: 87 mSDtfsCounter, 2055 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:44,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 1388 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-24 23:09:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2024-09-24 23:09:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 584. [2024-09-24 23:09:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.4455958549222798) internal successors, (837), 579 states have internal predecessors, (837), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 841 transitions. [2024-09-24 23:09:45,279 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 841 transitions. Word has length 36 [2024-09-24 23:09:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:45,279 INFO L474 AbstractCegarLoop]: Abstraction has 584 states and 841 transitions. [2024-09-24 23:09:45,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:45,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 841 transitions. [2024-09-24 23:09:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-24 23:09:45,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:45,281 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:45,298 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:45,485 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-24 23:09:45,485 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:45,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash 771129250, now seen corresponding path program 12 times [2024-09-24 23:09:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:45,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968067795] [2024-09-24 23:09:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:45,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:09:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968067795] [2024-09-24 23:09:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968067795] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511881680] [2024-09-24 23:09:45,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:09:45,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:45,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:45,751 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:45,753 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-24 23:09:45,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-24 23:09:45,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:45,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-24 23:09:45,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:09:45,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:09:46,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511881680] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:46,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:46,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2024-09-24 23:09:46,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851403135] [2024-09-24 23:09:46,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:46,084 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:09:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:09:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:09:46,085 INFO L87 Difference]: Start difference. First operand 584 states and 841 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:02,219 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:10:14,287 WARN L293 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:10:22,326 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:10:38,566 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:10:46,635 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:10:58,879 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:11:11,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:15,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:19,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:20,030 INFO L93 Difference]: Finished difference Result 1378 states and 2122 transitions. [2024-09-24 23:11:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-24 23:11:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-24 23:11:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:20,035 INFO L225 Difference]: With dead ends: 1378 [2024-09-24 23:11:20,035 INFO L226 Difference]: Without dead ends: 1352 [2024-09-24 23:11:20,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=657, Invalid=1505, Unknown=0, NotChecked=0, Total=2162 [2024-09-24 23:11:20,037 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 179 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 142 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:20,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 339 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 220 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2024-09-24 23:11:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2024-09-24 23:11:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 781. [2024-09-24 23:11:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 776 states have (on average 1.4884020618556701) internal successors, (1155), 776 states have internal predecessors, (1155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1159 transitions. [2024-09-24 23:11:20,610 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1159 transitions. Word has length 38 [2024-09-24 23:11:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:20,611 INFO L474 AbstractCegarLoop]: Abstraction has 781 states and 1159 transitions. [2024-09-24 23:11:20,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:20,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1159 transitions. [2024-09-24 23:11:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-24 23:11:20,612 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:20,612 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:20,631 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-24 23:11:20,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-24 23:11:20,817 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1178248642, now seen corresponding path program 13 times [2024-09-24 23:11:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921222288] [2024-09-24 23:11:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:21,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-24 23:11:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921222288] [2024-09-24 23:11:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921222288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926643511] [2024-09-24 23:11:21,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:11:21,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:21,020 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:11:21,023 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-24 23:11:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:21,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-24 23:11:21,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-24 23:11:21,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-24 23:11:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926643511] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:21,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:21,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 30 [2024-09-24 23:11:21,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102025420] [2024-09-24 23:11:21,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:21,365 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:11:21,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:21,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:11:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:11:21,366 INFO L87 Difference]: Start difference. First operand 781 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:23,457 INFO L93 Difference]: Finished difference Result 1202 states and 1667 transitions. [2024-09-24 23:11:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-24 23:11:23,457 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-24 23:11:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:23,462 INFO L225 Difference]: With dead ends: 1202 [2024-09-24 23:11:23,462 INFO L226 Difference]: Without dead ends: 1080 [2024-09-24 23:11:23,462 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=3009, Unknown=0, NotChecked=0, Total=3422 [2024-09-24 23:11:23,463 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 96 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:23,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 720 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:11:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2024-09-24 23:11:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 753. [2024-09-24 23:11:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 748 states have (on average 1.4705882352941178) internal successors, (1100), 748 states have internal predecessors, (1100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1104 transitions. [2024-09-24 23:11:24,057 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1104 transitions. Word has length 39 [2024-09-24 23:11:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:24,057 INFO L474 AbstractCegarLoop]: Abstraction has 753 states and 1104 transitions. [2024-09-24 23:11:24,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:24,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1104 transitions. [2024-09-24 23:11:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-24 23:11:24,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:24,059 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:24,075 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-24 23:11:24,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:24,259 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:24,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash -958108414, now seen corresponding path program 14 times [2024-09-24 23:11:24,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:24,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8703826] [2024-09-24 23:11:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:24,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:11:24,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8703826] [2024-09-24 23:11:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8703826] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795645056] [2024-09-24 23:11:24,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:11:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:24,868 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:11:24,869 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-24 23:11:24,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:11:24,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:24,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-24 23:11:24,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:11:25,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:11:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795645056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:25,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:25,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 28 [2024-09-24 23:11:25,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399020971] [2024-09-24 23:11:25,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:25,286 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-24 23:11:25,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-24 23:11:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:11:25,287 INFO L87 Difference]: Start difference. First operand 753 states and 1104 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:29,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:30,183 INFO L93 Difference]: Finished difference Result 770 states and 1120 transitions. [2024-09-24 23:11:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-24 23:11:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-24 23:11:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:30,186 INFO L225 Difference]: With dead ends: 770 [2024-09-24 23:11:30,186 INFO L226 Difference]: Without dead ends: 740 [2024-09-24 23:11:30,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-09-24 23:11:30,187 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:30,187 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 210 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 447 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-09-24 23:11:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2024-09-24 23:11:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2024-09-24 23:11:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 735 states have (on average 1.4775510204081632) internal successors, (1086), 735 states have internal predecessors, (1086), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1090 transitions. [2024-09-24 23:11:30,733 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1090 transitions. Word has length 40 [2024-09-24 23:11:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:30,733 INFO L474 AbstractCegarLoop]: Abstraction has 740 states and 1090 transitions. [2024-09-24 23:11:30,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:30,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1090 transitions. [2024-09-24 23:11:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:11:30,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:30,734 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:30,747 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-24 23:11:30,934 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:30,935 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:30,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -971466802, now seen corresponding path program 15 times [2024-09-24 23:11:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:30,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55691078] [2024-09-24 23:11:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:30,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:31,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:11:31,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55691078] [2024-09-24 23:11:31,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55691078] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747313406] [2024-09-24 23:11:31,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:11:31,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:31,237 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:11:31,238 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-24 23:11:31,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-24 23:11:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:31,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-24 23:11:31,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:11:31,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:11:31,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747313406] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:31,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:31,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-24 23:11:31,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388016867] [2024-09-24 23:11:31,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:31,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-24 23:11:31,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-24 23:11:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2024-09-24 23:11:31,904 INFO L87 Difference]: Start difference. First operand 740 states and 1090 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:12:20,240 INFO L93 Difference]: Finished difference Result 2703 states and 3973 transitions. [2024-09-24 23:12:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2024-09-24 23:12:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-24 23:12:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:12:20,247 INFO L225 Difference]: With dead ends: 2703 [2024-09-24 23:12:20,247 INFO L226 Difference]: Without dead ends: 2417 [2024-09-24 23:12:20,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45119 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=21007, Invalid=84943, Unknown=0, NotChecked=0, Total=105950 [2024-09-24 23:12:20,257 INFO L434 NwaCegarLoop]: 94 mSDtfsCounter, 2582 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 1187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1187 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:12:20,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2582 Valid, 1577 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1187 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-09-24 23:12:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2024-09-24 23:12:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 878. [2024-09-24 23:12:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 873 states have (on average 1.4490263459335624) internal successors, (1265), 873 states have internal predecessors, (1265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1269 transitions. [2024-09-24 23:12:21,005 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1269 transitions. Word has length 41 [2024-09-24 23:12:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:12:21,006 INFO L474 AbstractCegarLoop]: Abstraction has 878 states and 1269 transitions. [2024-09-24 23:12:21,006 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:21,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1269 transitions. [2024-09-24 23:12:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-24 23:12:21,007 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:12:21,007 INFO L216 NwaCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:12:21,019 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-24 23:12:21,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:21,207 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:12:21,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1510494176, now seen corresponding path program 4 times [2024-09-24 23:12:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:12:21,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158968794] [2024-09-24 23:12:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:12:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:12:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:21,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:12:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:21,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:12:21,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158968794] [2024-09-24 23:12:21,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158968794] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:12:21,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746535067] [2024-09-24 23:12:21,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:12:21,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:21,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:12:21,774 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:12:21,775 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-24 23:12:21,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:12:21,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:12:21,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-24 23:12:21,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:12:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:21,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:12:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746535067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:12:23,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:12:23,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2024-09-24 23:12:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105859458] [2024-09-24 23:12:23,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:12:23,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-24 23:12:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:12:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-24 23:12:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=2755, Unknown=0, NotChecked=0, Total=3660 [2024-09-24 23:12:23,103 INFO L87 Difference]: Start difference. First operand 878 states and 1269 transitions. Second operand has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)