./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --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-de32597-m [2024-09-18 15:47:14,060 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:47:14,143 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:47:14,148 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:47:14,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:47:14,173 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:47:14,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:47:14,175 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:47:14,175 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:47:14,177 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:47:14,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:47:14,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:47:14,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:47:14,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:47:14,179 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:47:14,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:47:14,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:47:14,180 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:47:14,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:47:14,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:47:14,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:47:14,182 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:47:14,182 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:47:14,182 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:47:14,182 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:47:14,183 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:47:14,183 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:47:14,183 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:47:14,184 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:47:14,184 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:47:14,184 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:47:14,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:47:14,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:47:14,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:47:14,185 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:47:14,186 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:47:14,186 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:47:14,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:47:14,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:47:14,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:47:14,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:47:14,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:47:14,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:47:14,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:47:14,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:47:14,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:47:14,455 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:47:14,455 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:47:14,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-09-18 15:47:15,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:47:15,971 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:47:15,971 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-09-18 15:47:15,978 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/576f74b66/9b6e22464db245a4b130b3eff2bccf86/FLAG6ae53ba53 [2024-09-18 15:47:16,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/576f74b66/9b6e22464db245a4b130b3eff2bccf86 [2024-09-18 15:47:16,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:47:16,369 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:47:16,370 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:47:16,370 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:47:16,374 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:47:16,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,375 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c061e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16, skipping insertion in model container [2024-09-18 15:47:16,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:47:16,541 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/nested_delay_nd.c[465,478] [2024-09-18 15:47:16,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:47:16,573 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:47:16,616 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/nested_delay_nd.c[465,478] [2024-09-18 15:47:16,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:47:16,647 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:47:16,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16 WrapperNode [2024-09-18 15:47:16,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:47:16,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:47:16,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:47:16,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:47:16,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,684 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:47:16,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:47:16,686 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:47:16,686 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:47:16,686 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:47:16,696 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,697 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,714 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]. [2024-09-18 15:47:16,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,721 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,726 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:47:16,730 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:47:16,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:47:16,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:47:16,731 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (1/1) ... [2024-09-18 15:47:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:47:16,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:16,767 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) [2024-09-18 15:47:16,773 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 [2024-09-18 15:47:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:47:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 15:47:16,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 15:47:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:47:16,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:47:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:47:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:47:16,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:47:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:47:16,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:47:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:47:16,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:47:16,873 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:47:16,875 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:47:17,023 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-18 15:47:17,023 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:47:17,046 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:47:17,047 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:47:17,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:47:17 BoogieIcfgContainer [2024-09-18 15:47:17,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:47:17,049 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:47:17,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:47:17,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:47:17,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:47:16" (1/3) ... [2024-09-18 15:47:17,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e13d0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:47:17, skipping insertion in model container [2024-09-18 15:47:17,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:16" (2/3) ... [2024-09-18 15:47:17,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e13d0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:47:17, skipping insertion in model container [2024-09-18 15:47:17,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:47:17" (3/3) ... [2024-09-18 15:47:17,057 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2024-09-18 15:47:17,071 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:47:17,071 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:47:17,115 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:47:17,121 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;@31b9f1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:47:17,122 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:47:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:47:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:47:17,132 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:17,135 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] [2024-09-18 15:47:17,136 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:17,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1899367790, now seen corresponding path program 1 times [2024-09-18 15:47:17,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:17,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542567060] [2024-09-18 15:47:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:17,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:17,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:17,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:17,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:17,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542567060] [2024-09-18 15:47:17,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542567060] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:17,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:17,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:47:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532033408] [2024-09-18 15:47:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:17,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:47:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:47:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:47:17,357 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:17,436 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2024-09-18 15:47:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:47:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-18 15:47:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:17,446 INFO L225 Difference]: With dead ends: 48 [2024-09-18 15:47:17,446 INFO L226 Difference]: Without dead ends: 26 [2024-09-18 15:47:17,449 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:47:17,454 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:17,456 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:47:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-18 15:47:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-18 15:47:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:47:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-09-18 15:47:17,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2024-09-18 15:47:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:17,506 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-09-18 15:47:17,506 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:17,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-09-18 15:47:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:47:17,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:17,511 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] [2024-09-18 15:47:17,511 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:47:17,511 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:17,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash -678482725, now seen corresponding path program 1 times [2024-09-18 15:47:17,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:17,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543864909] [2024-09-18 15:47:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:17,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:17,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:17,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:17,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543864909] [2024-09-18 15:47:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543864909] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:17,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:17,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:47:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281248719] [2024-09-18 15:47:17,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:17,775 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:47:17,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:47:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:47:17,779 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:47:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:17,903 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-09-18 15:47:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:47:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-18 15:47:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:17,904 INFO L225 Difference]: With dead ends: 44 [2024-09-18 15:47:17,904 INFO L226 Difference]: Without dead ends: 29 [2024-09-18 15:47:17,905 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:47:17,906 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:17,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 13 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:47:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-18 15:47:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-09-18 15:47:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:47:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-18 15:47:17,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2024-09-18 15:47:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:17,918 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-18 15:47:17,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:47:17,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-18 15:47:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 15:47:17,921 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:17,922 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, 1, 1, 1] [2024-09-18 15:47:17,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:47:17,922 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:17,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:17,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2109323453, now seen corresponding path program 1 times [2024-09-18 15:47:17,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:17,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682325256] [2024-09-18 15:47:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:17,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:18,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:18,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:47:18,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:18,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682325256] [2024-09-18 15:47:18,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682325256] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:18,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:18,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:47:18,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516033046] [2024-09-18 15:47:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:18,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:47:18,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:47:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:47:18,027 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:18,120 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2024-09-18 15:47:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:47:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-09-18 15:47:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:18,123 INFO L225 Difference]: With dead ends: 48 [2024-09-18 15:47:18,123 INFO L226 Difference]: Without dead ends: 32 [2024-09-18 15:47:18,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:47:18,126 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:18,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:47:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-18 15:47:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-09-18 15:47:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:47:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-18 15:47:18,146 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2024-09-18 15:47:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:18,146 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-18 15:47:18,147 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:18,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-18 15:47:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 15:47:18,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:18,148 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, 1, 1, 1] [2024-09-18 15:47:18,148 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:47:18,149 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:18,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash -334316091, now seen corresponding path program 1 times [2024-09-18 15:47:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:18,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761529813] [2024-09-18 15:47:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:18,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:18,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:18,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761529813] [2024-09-18 15:47:18,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761529813] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319532678] [2024-09-18 15:47:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:18,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:18,283 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) [2024-09-18 15:47:18,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:47:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:18,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:47:18,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:18,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:18,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319532678] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:18,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:18,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-09-18 15:47:18,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143952523] [2024-09-18 15:47:18,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:18,546 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:47:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:47:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:47:18,548 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:18,681 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-09-18 15:47:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:47:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-09-18 15:47:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:18,684 INFO L225 Difference]: With dead ends: 54 [2024-09-18 15:47:18,684 INFO L226 Difference]: Without dead ends: 37 [2024-09-18 15:47:18,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:47:18,688 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:18,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 14 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:47:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-18 15:47:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-18 15:47:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:47:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-18 15:47:18,701 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 23 [2024-09-18 15:47:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:18,702 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-18 15:47:18,702 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:18,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-18 15:47:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:47:18,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:18,704 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:18,721 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:47:18,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:18,909 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:18,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash -914591395, now seen corresponding path program 2 times [2024-09-18 15:47:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446674391] [2024-09-18 15:47:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:19,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:19,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:19,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:19,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446674391] [2024-09-18 15:47:19,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446674391] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:19,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916976283] [2024-09-18 15:47:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:47:19,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:19,104 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) [2024-09-18 15:47:19,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:47:19,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:47:19,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:47:19,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-18 15:47:19,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 15:47:19,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 15:47:19,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916976283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:19,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:19,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2024-09-18 15:47:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566066233] [2024-09-18 15:47:19,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:19,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:47:19,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:47:19,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:47:19,315 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:47:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:20,262 INFO L93 Difference]: Finished difference Result 178 states and 247 transitions. [2024-09-18 15:47:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-18 15:47:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-09-18 15:47:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:20,266 INFO L225 Difference]: With dead ends: 178 [2024-09-18 15:47:20,268 INFO L226 Difference]: Without dead ends: 152 [2024-09-18 15:47:20,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=677, Invalid=2079, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 15:47:20,270 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:20,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 30 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:47:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-09-18 15:47:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2024-09-18 15:47:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 102 states have internal predecessors, (137), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 15:47:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2024-09-18 15:47:20,299 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 32 [2024-09-18 15:47:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:20,300 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2024-09-18 15:47:20,300 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:47:20,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2024-09-18 15:47:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 15:47:20,301 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:20,302 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:20,321 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:47:20,505 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:20,506 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:20,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2125730691, now seen corresponding path program 1 times [2024-09-18 15:47:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:20,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435535629] [2024-09-18 15:47:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-18 15:47:20,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435535629] [2024-09-18 15:47:20,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435535629] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:20,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:20,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:47:20,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287046300] [2024-09-18 15:47:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:20,563 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:47:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:47:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:47:20,564 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:20,633 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2024-09-18 15:47:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:47:20,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2024-09-18 15:47:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:20,635 INFO L225 Difference]: With dead ends: 222 [2024-09-18 15:47:20,635 INFO L226 Difference]: Without dead ends: 120 [2024-09-18 15:47:20,636 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:47:20,636 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:20,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:47:20,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-18 15:47:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2024-09-18 15:47:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 74 states have internal predecessors, (95), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:47:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2024-09-18 15:47:20,656 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 35 [2024-09-18 15:47:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:20,656 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2024-09-18 15:47:20,656 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:20,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2024-09-18 15:47:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 15:47:20,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:20,658 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:20,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-18 15:47:20,658 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:20,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:20,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1071915545, now seen corresponding path program 1 times [2024-09-18 15:47:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:20,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500490416] [2024-09-18 15:47:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-18 15:47:20,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:20,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500490416] [2024-09-18 15:47:20,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500490416] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:20,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:20,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:47:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276802022] [2024-09-18 15:47:20,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:20,714 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:47:20,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:47:20,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:47:20,715 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:20,775 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2024-09-18 15:47:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:47:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-09-18 15:47:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:20,777 INFO L225 Difference]: With dead ends: 160 [2024-09-18 15:47:20,777 INFO L226 Difference]: Without dead ends: 88 [2024-09-18 15:47:20,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:47:20,778 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:20,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:47:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-18 15:47:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-18 15:47:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 79 states have internal predecessors, (100), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:47:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-09-18 15:47:20,827 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 36 [2024-09-18 15:47:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:20,828 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-09-18 15:47:20,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:20,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-09-18 15:47:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 15:47:20,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:20,829 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:20,830 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-18 15:47:20,830 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:20,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1014657243, now seen corresponding path program 1 times [2024-09-18 15:47:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:20,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678779538] [2024-09-18 15:47:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:20,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:20,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:20,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678779538] [2024-09-18 15:47:20,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678779538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:20,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769530613] [2024-09-18 15:47:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:20,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:20,975 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) [2024-09-18 15:47:20,977 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:47:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:21,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:47:21,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:21,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:21,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769530613] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:21,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:21,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-09-18 15:47:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670175025] [2024-09-18 15:47:21,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:21,324 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 15:47:21,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 15:47:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:47:21,327 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:21,552 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2024-09-18 15:47:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 15:47:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-09-18 15:47:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:21,554 INFO L225 Difference]: With dead ends: 239 [2024-09-18 15:47:21,555 INFO L226 Difference]: Without dead ends: 162 [2024-09-18 15:47:21,555 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2024-09-18 15:47:21,556 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:21,556 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 14 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:47:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-18 15:47:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2024-09-18 15:47:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 140 states have (on average 1.25) internal successors, (175), 141 states have internal predecessors, (175), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:47:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2024-09-18 15:47:21,589 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 36 [2024-09-18 15:47:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:21,589 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2024-09-18 15:47:21,589 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:21,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2024-09-18 15:47:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 15:47:21,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:21,592 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:21,609 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 15:47:21,795 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 [2024-09-18 15:47:21,796 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:21,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1524013939, now seen corresponding path program 2 times [2024-09-18 15:47:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:21,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408680223] [2024-09-18 15:47:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:22,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:22,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:22,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408680223] [2024-09-18 15:47:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408680223] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286477369] [2024-09-18 15:47:22,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:47:22,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:22,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:22,068 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) [2024-09-18 15:47:22,069 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:47:22,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:47:22,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:47:22,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 15:47:22,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:22,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:22,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286477369] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:22,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:22,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2024-09-18 15:47:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747877893] [2024-09-18 15:47:22,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:22,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-18 15:47:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-18 15:47:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=1103, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 15:47:22,782 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:23,315 INFO L93 Difference]: Finished difference Result 443 states and 595 transitions. [2024-09-18 15:47:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-18 15:47:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2024-09-18 15:47:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:23,318 INFO L225 Difference]: With dead ends: 443 [2024-09-18 15:47:23,318 INFO L226 Difference]: Without dead ends: 304 [2024-09-18 15:47:23,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1197, Invalid=2109, Unknown=0, NotChecked=0, Total=3306 [2024-09-18 15:47:23,320 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 264 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:23,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 15 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:47:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-09-18 15:47:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 276. [2024-09-18 15:47:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 266 states have (on average 1.236842105263158) internal successors, (329), 267 states have internal predecessors, (329), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:47:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 338 transitions. [2024-09-18 15:47:23,368 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 338 transitions. Word has length 57 [2024-09-18 15:47:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:23,368 INFO L474 AbstractCegarLoop]: Abstraction has 276 states and 338 transitions. [2024-09-18 15:47:23,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:23,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 338 transitions. [2024-09-18 15:47:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-18 15:47:23,371 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:23,371 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:23,385 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:47:23,575 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 [2024-09-18 15:47:23,575 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:23,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash -610331763, now seen corresponding path program 3 times [2024-09-18 15:47:23,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:23,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882781402] [2024-09-18 15:47:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:23,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:24,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:24,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:24,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:24,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882781402] [2024-09-18 15:47:24,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882781402] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:24,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263346901] [2024-09-18 15:47:24,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:47:24,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:24,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:24,273 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) [2024-09-18 15:47:24,274 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:47:24,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:47:24,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:47:24,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-18 15:47:24,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2024-09-18 15:47:24,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:47:24,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263346901] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:24,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:47:24,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [31] total 38 [2024-09-18 15:47:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026216707] [2024-09-18 15:47:24,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:24,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:47:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:47:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=976, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 15:47:24,748 INFO L87 Difference]: Start difference. First operand 276 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:24,906 INFO L93 Difference]: Finished difference Result 460 states and 556 transitions. [2024-09-18 15:47:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:47:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 99 [2024-09-18 15:47:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:24,909 INFO L225 Difference]: With dead ends: 460 [2024-09-18 15:47:24,909 INFO L226 Difference]: Without dead ends: 458 [2024-09-18 15:47:24,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=434, Invalid=1048, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 15:47:24,911 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:24,911 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:47:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2024-09-18 15:47:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2024-09-18 15:47:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 442 states have (on average 1.2171945701357465) internal successors, (538), 444 states have internal predecessors, (538), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 15:47:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 551 transitions. [2024-09-18 15:47:25,000 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 551 transitions. Word has length 99 [2024-09-18 15:47:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:25,001 INFO L474 AbstractCegarLoop]: Abstraction has 456 states and 551 transitions. [2024-09-18 15:47:25,001 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:47:25,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 551 transitions. [2024-09-18 15:47:25,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-18 15:47:25,003 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:25,003 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:25,020 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:47:25,203 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 [2024-09-18 15:47:25,204 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:25,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -612178805, now seen corresponding path program 1 times [2024-09-18 15:47:25,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:25,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479629773] [2024-09-18 15:47:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:25,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:25,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2024-09-18 15:47:25,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:25,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479629773] [2024-09-18 15:47:25,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479629773] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:25,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:47:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658088402] [2024-09-18 15:47:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:25,345 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:47:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:47:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:47:25,346 INFO L87 Difference]: Start difference. First operand 456 states and 551 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:47:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:25,542 INFO L93 Difference]: Finished difference Result 978 states and 1200 transitions. [2024-09-18 15:47:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:47:25,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2024-09-18 15:47:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:25,548 INFO L225 Difference]: With dead ends: 978 [2024-09-18 15:47:25,548 INFO L226 Difference]: Without dead ends: 713 [2024-09-18 15:47:25,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:47:25,550 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:25,550 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:47:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-09-18 15:47:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2024-09-18 15:47:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 696 states have (on average 1.221264367816092) internal successors, (850), 699 states have internal predecessors, (850), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 15:47:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 869 transitions. [2024-09-18 15:47:25,671 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 869 transitions. Word has length 99 [2024-09-18 15:47:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:25,672 INFO L474 AbstractCegarLoop]: Abstraction has 713 states and 869 transitions. [2024-09-18 15:47:25,672 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:47:25,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 869 transitions. [2024-09-18 15:47:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-18 15:47:25,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:25,674 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:25,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-18 15:47:25,675 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:25,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash 119150093, now seen corresponding path program 1 times [2024-09-18 15:47:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:25,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957113362] [2024-09-18 15:47:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:26,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:26,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957113362] [2024-09-18 15:47:26,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957113362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086733911] [2024-09-18 15:47:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:26,386 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) [2024-09-18 15:47:26,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:47:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:26,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-18 15:47:26,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:27,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:28,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086733911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:28,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:28,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 87 [2024-09-18 15:47:28,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070177869] [2024-09-18 15:47:28,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:28,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-18 15:47:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-18 15:47:28,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3063, Invalid=4419, Unknown=0, NotChecked=0, Total=7482 [2024-09-18 15:47:28,271 INFO L87 Difference]: Start difference. First operand 713 states and 869 transitions. Second operand has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:31,736 INFO L93 Difference]: Finished difference Result 2542 states and 3418 transitions. [2024-09-18 15:47:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-09-18 15:47:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 99 [2024-09-18 15:47:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:31,745 INFO L225 Difference]: With dead ends: 2542 [2024-09-18 15:47:31,745 INFO L226 Difference]: Without dead ends: 1999 [2024-09-18 15:47:31,753 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10338 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9966, Invalid=21186, Unknown=0, NotChecked=0, Total=31152 [2024-09-18 15:47:31,753 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 988 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:31,753 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 29 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:47:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2024-09-18 15:47:32,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1819. [2024-09-18 15:47:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1797 states have (on average 1.196438508625487) internal successors, (2150), 1801 states have internal predecessors, (2150), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:47:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2175 transitions. [2024-09-18 15:47:32,051 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2175 transitions. Word has length 99 [2024-09-18 15:47:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:32,052 INFO L474 AbstractCegarLoop]: Abstraction has 1819 states and 2175 transitions. [2024-09-18 15:47:32,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:32,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2175 transitions. [2024-09-18 15:47:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-09-18 15:47:32,055 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:32,055 INFO L216 NwaCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:32,071 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:47:32,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 15:47:32,260 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:32,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash 756563597, now seen corresponding path program 2 times [2024-09-18 15:47:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71330371] [2024-09-18 15:47:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:34,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:34,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:47:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71330371] [2024-09-18 15:47:34,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71330371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:34,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124203998] [2024-09-18 15:47:34,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:47:34,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:34,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:34,382 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) [2024-09-18 15:47:34,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:47:34,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:47:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:47:34,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-18 15:47:34,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:36,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:39,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124203998] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:39,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:39,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 173 [2024-09-18 15:47:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374643821] [2024-09-18 15:47:39,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:39,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2024-09-18 15:47:39,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2024-09-18 15:47:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12125, Invalid=17631, Unknown=0, NotChecked=0, Total=29756 [2024-09-18 15:47:39,815 INFO L87 Difference]: Start difference. First operand 1819 states and 2175 transitions. Second operand has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:47:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:59,994 INFO L93 Difference]: Finished difference Result 12026 states and 14700 transitions. [2024-09-18 15:47:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2024-09-18 15:47:59,995 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 183 [2024-09-18 15:47:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:48:00,036 INFO L225 Difference]: With dead ends: 12026 [2024-09-18 15:48:00,036 INFO L226 Difference]: Without dead ends: 10628 [2024-09-18 15:48:00,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67792 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=60774, Invalid=140378, Unknown=0, NotChecked=0, Total=201152 [2024-09-18 15:48:00,056 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2314 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:48:00,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 34 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 15:48:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10628 states. [2024-09-18 15:48:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10628 to 4196. [2024-09-18 15:48:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4196 states, 4169 states have (on average 1.2165987047253537) internal successors, (5072), 4174 states have internal predecessors, (5072), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 15:48:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 5103 transitions. [2024-09-18 15:48:01,041 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 5103 transitions. Word has length 183 [2024-09-18 15:48:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:48:01,042 INFO L474 AbstractCegarLoop]: Abstraction has 4196 states and 5103 transitions. [2024-09-18 15:48:01,042 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 15:48:01,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 5103 transitions. [2024-09-18 15:48:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2024-09-18 15:48:01,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:48:01,048 INFO L216 NwaCegarLoop]: trace histogram [108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:48:01,064 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:48:01,251 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:01,252 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:48:01,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash 613596365, now seen corresponding path program 1 times [2024-09-18 15:48:01,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:48:01,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559482839] [2024-09-18 15:48:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:48:01,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:48:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:01,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:48:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:01,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:48:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17442 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17442 trivial. 0 not checked. [2024-09-18 15:48:01,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:48:01,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559482839] [2024-09-18 15:48:01,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559482839] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:48:01,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:48:01,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:48:01,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671872461] [2024-09-18 15:48:01,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:48:01,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:48:01,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:48:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:48:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:48:01,453 INFO L87 Difference]: Start difference. First operand 4196 states and 5103 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:48:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:48:02,770 INFO L93 Difference]: Finished difference Result 7524 states and 9224 transitions. [2024-09-18 15:48:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:48:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 345 [2024-09-18 15:48:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:48:02,792 INFO L225 Difference]: With dead ends: 7524 [2024-09-18 15:48:02,792 INFO L226 Difference]: Without dead ends: 5851 [2024-09-18 15:48:02,796 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:48:02,796 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:48:02,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:48:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2024-09-18 15:48:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4871. [2024-09-18 15:48:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4871 states, 4842 states have (on average 1.2327550598926063) internal successors, (5969), 4847 states have internal predecessors, (5969), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 15:48:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4871 states to 4871 states and 6004 transitions. [2024-09-18 15:48:03,838 INFO L78 Accepts]: Start accepts. Automaton has 4871 states and 6004 transitions. Word has length 345 [2024-09-18 15:48:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:48:03,839 INFO L474 AbstractCegarLoop]: Abstraction has 4871 states and 6004 transitions. [2024-09-18 15:48:03,839 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:48:03,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4871 states and 6004 transitions. [2024-09-18 15:48:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2024-09-18 15:48:03,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:48:03,845 INFO L216 NwaCegarLoop]: trace histogram [109, 109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:48:03,845 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-18 15:48:03,845 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:48:03,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1256704231, now seen corresponding path program 3 times [2024-09-18 15:48:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:48:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3358087] [2024-09-18 15:48:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:48:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:48:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:10,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:48:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:10,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:48:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17767 backedges. 0 proven. 17767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:10,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:48:10,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3358087] [2024-09-18 15:48:10,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3358087] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:48:10,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968913586] [2024-09-18 15:48:10,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:48:10,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:10,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:48:10,877 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) [2024-09-18 15:48:10,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:48:10,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:48:10,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:48:10,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-18 15:48:10,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:48:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17767 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 17442 trivial. 0 not checked. [2024-09-18 15:48:12,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:48:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968913586] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:48:12,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:48:12,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [115] total 122 [2024-09-18 15:48:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173499007] [2024-09-18 15:48:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:48:12,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:48:12,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:48:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:48:12,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6133, Invalid=8629, Unknown=0, NotChecked=0, Total=14762 [2024-09-18 15:48:12,142 INFO L87 Difference]: Start difference. First operand 4871 states and 6004 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:48:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:48:13,257 INFO L93 Difference]: Finished difference Result 4882 states and 6015 transitions. [2024-09-18 15:48:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:48:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 348 [2024-09-18 15:48:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:48:13,278 INFO L225 Difference]: With dead ends: 4882 [2024-09-18 15:48:13,278 INFO L226 Difference]: Without dead ends: 4880 [2024-09-18 15:48:13,280 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6137, Invalid=8869, Unknown=0, NotChecked=0, Total=15006 [2024-09-18 15:48:13,281 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:48:13,281 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:48:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2024-09-18 15:48:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4879. [2024-09-18 15:48:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4879 states, 4848 states have (on average 1.23246699669967) internal successors, (5975), 4854 states have internal predecessors, (5975), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 12 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-18 15:48:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6012 transitions. [2024-09-18 15:48:14,088 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6012 transitions. Word has length 348 [2024-09-18 15:48:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:48:14,089 INFO L474 AbstractCegarLoop]: Abstraction has 4879 states and 6012 transitions. [2024-09-18 15:48:14,089 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 15:48:14,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6012 transitions. [2024-09-18 15:48:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2024-09-18 15:48:14,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:48:14,108 INFO L216 NwaCegarLoop]: trace histogram [216, 216, 216, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:48:14,124 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 15:48:14,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:14,309 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:48:14,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash 346650736, now seen corresponding path program 1 times [2024-09-18 15:48:14,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:48:14,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490979529] [2024-09-18 15:48:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:48:14,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:48:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:22,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:48:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:22,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:48:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:22,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 341 [2024-09-18 15:48:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35212 proven. 17442 refuted. 0 times theorem prover too weak. 17447 trivial. 0 not checked. [2024-09-18 15:48:22,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:48:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490979529] [2024-09-18 15:48:22,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490979529] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:48:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701353671] [2024-09-18 15:48:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:48:22,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:48:22,868 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) [2024-09-18 15:48:22,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:48:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:23,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-18 15:48:23,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:48:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35210 proven. 17442 refuted. 0 times theorem prover too weak. 17449 trivial. 0 not checked. [2024-09-18 15:48:28,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:48:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35212 proven. 17442 refuted. 0 times theorem prover too weak. 17447 trivial. 0 not checked. [2024-09-18 15:48:41,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701353671] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:48:41,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:48:41,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 332 [2024-09-18 15:48:41,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633566665] [2024-09-18 15:48:41,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:48:41,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 332 states [2024-09-18 15:48:41,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:48:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 332 interpolants. [2024-09-18 15:48:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48405, Invalid=61487, Unknown=0, NotChecked=0, Total=109892 [2024-09-18 15:48:41,427 INFO L87 Difference]: Start difference. First operand 4879 states and 6012 transitions. Second operand has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-18 15:49:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:21,487 INFO L93 Difference]: Finished difference Result 61262 states and 67026 transitions. [2024-09-18 15:49:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2024-09-18 15:49:21,488 INFO L78 Accepts]: Start accepts. Automaton has has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 680 [2024-09-18 15:49:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:21,653 INFO L225 Difference]: With dead ends: 61262 [2024-09-18 15:49:21,653 INFO L226 Difference]: Without dead ends: 57210 [2024-09-18 15:49:21,690 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1587 GetRequests, 1147 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71936 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=72717, Invalid=122205, Unknown=0, NotChecked=0, Total=194922 [2024-09-18 15:49:21,690 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1843 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:21,691 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 22 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:49:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57210 states. [2024-09-18 15:49:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57210 to 11786. [2024-09-18 15:49:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11786 states, 11755 states have (on average 1.1982135261590812) internal successors, (14085), 11761 states have internal predecessors, (14085), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 12 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-18 15:49:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11786 states to 11786 states and 14122 transitions. [2024-09-18 15:49:29,426 INFO L78 Accepts]: Start accepts. Automaton has 11786 states and 14122 transitions. Word has length 680 [2024-09-18 15:49:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:29,427 INFO L474 AbstractCegarLoop]: Abstraction has 11786 states and 14122 transitions. [2024-09-18 15:49:29,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-18 15:49:29,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 11786 states and 14122 transitions. [2024-09-18 15:49:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2024-09-18 15:49:29,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:29,454 INFO L216 NwaCegarLoop]: trace histogram [436, 436, 436, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:29,472 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:49:29,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-18 15:49:29,654 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:29,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 379592880, now seen corresponding path program 2 times [2024-09-18 15:49:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242496967] [2024-09-18 15:49:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:29,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:50:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 15:50:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 671 [2024-09-18 15:50:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:50:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143012 proven. 71177 refuted. 0 times theorem prover too weak. 71182 trivial. 0 not checked. [2024-09-18 15:50:05,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:50:05,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242496967] [2024-09-18 15:50:05,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242496967] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:50:05,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928971970] [2024-09-18 15:50:05,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:50:05,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:50:05,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:50:05,168 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) [2024-09-18 15:50:05,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:50:05,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:50:05,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:50:05,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 221 conjuncts are in the unsatisfiable core [2024-09-18 15:50:05,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:50:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143010 proven. 71177 refuted. 0 times theorem prover too weak. 71184 trivial. 0 not checked. [2024-09-18 15:50:25,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:51:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143012 proven. 71177 refuted. 0 times theorem prover too weak. 71182 trivial. 0 not checked. [2024-09-18 15:51:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928971970] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:51:17,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:51:17,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [223, 222, 222] total 662 [2024-09-18 15:51:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110358940] [2024-09-18 15:51:17,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:51:17,073 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 662 states [2024-09-18 15:51:17,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:51:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 662 interpolants. [2024-09-18 15:51:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193605, Invalid=243977, Unknown=0, NotChecked=0, Total=437582 [2024-09-18 15:51:17,131 INFO L87 Difference]: Start difference. First operand 11786 states and 14122 transitions. Second operand has 662 states, 662 states have (on average 3.0181268882175227) internal successors, (1998), 661 states have internal predecessors, (1998), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7)