./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:56:37,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:56:37,120 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:56:37,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:56:37,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:56:37,158 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:56:37,159 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:56:37,159 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:56:37,160 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:56:37,164 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:56:37,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:56:37,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:56:37,165 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:56:37,166 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:56:37,166 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:56:37,166 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:56:37,166 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:56:37,167 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:56:37,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:56:37,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:56:37,168 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:56:37,168 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:56:37,169 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:56:37,169 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:56:37,169 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:56:37,169 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:56:37,170 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:56:37,170 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:56:37,170 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:56:37,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:56:37,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:56:37,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:56:37,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:56:37,172 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:56:37,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:56:37,173 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:56:37,173 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:56:37,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:56:37,174 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:56:37,174 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:56:37,175 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:56:37,175 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:56:37,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:56:37,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:56:37,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:56:37,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:56:37,528 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:56:37,528 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:56:37,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2024-09-12 15:56:39,093 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:56:39,332 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:56:39,335 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2024-09-12 15:56:39,345 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f40e94b95/05ad1528883f4d4684d86e63ceffdff0/FLAG2a5dd9f1d [2024-09-12 15:56:39,688 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f40e94b95/05ad1528883f4d4684d86e63ceffdff0 [2024-09-12 15:56:39,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:56:39,691 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:56:39,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:56:39,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:56:39,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:56:39,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:39,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b58b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39, skipping insertion in model container [2024-09-12 15:56:39,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:39,721 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:56:39,885 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2024-09-12 15:56:39,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:56:39,935 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:56:39,946 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2024-09-12 15:56:39,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:56:39,987 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:56:39,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39 WrapperNode [2024-09-12 15:56:39,988 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:56:39,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:56:39,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:56:39,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:56:39,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,008 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:56:40,009 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:56:40,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:56:40,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:56:40,010 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:56:40,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,025 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,044 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 15:56:40,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:56:40,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:56:40,061 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:56:40,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:56:40,062 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (1/1) ... [2024-09-12 15:56:40,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:56:40,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:40,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 15:56:40,105 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 15:56:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:56:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 15:56:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 15:56:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:56:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:56:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:56:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:56:40,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:56:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:56:40,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:56:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:56:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:56:40,221 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:56:40,223 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:56:40,401 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-12 15:56:40,402 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:56:40,425 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:56:40,425 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 15:56:40,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:56:40 BoogieIcfgContainer [2024-09-12 15:56:40,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:56:40,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:56:40,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:56:40,431 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:56:40,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:56:39" (1/3) ... [2024-09-12 15:56:40,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8160f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:56:40, skipping insertion in model container [2024-09-12 15:56:40,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:56:39" (2/3) ... [2024-09-12 15:56:40,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8160f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:56:40, skipping insertion in model container [2024-09-12 15:56:40,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:56:40" (3/3) ... [2024-09-12 15:56:40,434 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2024-09-12 15:56:40,450 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:56:40,451 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:56:40,519 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:56:40,530 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;@78a1a178, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:56:40,530 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:56:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 15:56:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 15:56:40,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:40,548 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:40,549 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:40,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-12 15:56:40,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:40,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469195873] [2024-09-12 15:56:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:40,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:56:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:56:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:56:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:56:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:56:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:56:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:56:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:56:40,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469195873] [2024-09-12 15:56:40,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469195873] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:56:40,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:56:40,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 15:56:40,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518104267] [2024-09-12 15:56:40,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:56:40,803 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 15:56:40,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 15:56:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:56:40,825 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 15:56:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:40,861 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-12 15:56:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 15:56:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-12 15:56:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:40,873 INFO L225 Difference]: With dead ends: 70 [2024-09-12 15:56:40,874 INFO L226 Difference]: Without dead ends: 34 [2024-09-12 15:56:40,878 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:56:40,882 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:40,883 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:56:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-12 15:56:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-12 15:56:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:56:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-12 15:56:40,924 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-12 15:56:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:40,925 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-12 15:56:40,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-12 15:56:40,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-12 15:56:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 15:56:40,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:40,935 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:40,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:56:40,936 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:40,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:40,937 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-12 15:56:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:40,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445072170] [2024-09-12 15:56:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:56:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:56:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:56:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:56:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:56:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:56:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:56:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 15:56:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445072170] [2024-09-12 15:56:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445072170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:56:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955955227] [2024-09-12 15:56:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:41,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:41,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:41,356 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:56:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:41,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 15:56:41,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 15:56:41,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:56:41,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955955227] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:56:41,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:56:41,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-12 15:56:41,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284724637] [2024-09-12 15:56:41,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:56:41,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:56:41,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:56:41,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:56:41,835 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-12 15:56:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:42,081 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-12 15:56:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:56:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-12 15:56:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:42,084 INFO L225 Difference]: With dead ends: 55 [2024-09-12 15:56:42,084 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 15:56:42,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:56:42,086 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:42,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:56:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 15:56:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-12 15:56:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:56:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-12 15:56:42,109 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-12 15:56:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:42,110 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-12 15:56:42,111 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-12 15:56:42,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-12 15:56:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:56:42,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:42,114 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:42,132 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 15:56:42,318 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:42,319 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:42,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-12 15:56:42,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:42,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121047289] [2024-09-12 15:56:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:42,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:42,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399113858] [2024-09-12 15:56:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:42,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:42,371 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:56:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:42,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:56:42,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:56:42,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:56:42,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121047289] [2024-09-12 15:56:42,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:42,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399113858] [2024-09-12 15:56:42,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399113858] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:56:42,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:56:42,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:56:42,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925637207] [2024-09-12 15:56:42,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:56:42,482 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:56:42,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:42,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:56:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:56:42,484 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-12 15:56:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:42,539 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-12 15:56:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:56:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-12 15:56:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:42,541 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:56:42,542 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 15:56:42,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:56:42,544 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:42,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:56:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 15:56:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-12 15:56:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:56:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-12 15:56:42,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-12 15:56:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:42,563 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-12 15:56:42,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-12 15:56:42,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-12 15:56:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:56:42,565 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:42,569 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:42,586 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 15:56:42,773 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:42,774 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:42,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:42,775 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-12 15:56:42,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:42,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261589539] [2024-09-12 15:56:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:42,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018466690] [2024-09-12 15:56:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:42,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:42,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:42,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:42,798 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:56:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:42,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:56:42,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 15:56:42,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:56:42,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261589539] [2024-09-12 15:56:42,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018466690] [2024-09-12 15:56:42,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018466690] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:56:42,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:56:42,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:56:42,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335609031] [2024-09-12 15:56:42,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:56:42,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:56:42,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:42,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:56:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:56:42,931 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-12 15:56:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:42,984 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-12 15:56:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:56:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-12 15:56:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:42,990 INFO L225 Difference]: With dead ends: 61 [2024-09-12 15:56:42,990 INFO L226 Difference]: Without dead ends: 59 [2024-09-12 15:56:42,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:56:42,991 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:42,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:56:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-12 15:56:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-12 15:56:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:56:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-12 15:56:43,004 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-12 15:56:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:43,004 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-12 15:56:43,005 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-12 15:56:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-12 15:56:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:56:43,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:43,007 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:43,023 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 15:56:43,210 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:43,211 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:43,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-12 15:56:43,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:43,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043581606] [2024-09-12 15:56:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:43,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:43,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963544672] [2024-09-12 15:56:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:43,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:43,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:43,241 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:56:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:43,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:56:43,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 15:56:43,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:56:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:43,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043581606] [2024-09-12 15:56:43,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:43,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963544672] [2024-09-12 15:56:43,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963544672] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:56:43,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:56:43,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:56:43,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943621280] [2024-09-12 15:56:43,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:56:43,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:56:43,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:43,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:56:43,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:56:43,445 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-12 15:56:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:43,507 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-12 15:56:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:56:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-12 15:56:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:43,515 INFO L225 Difference]: With dead ends: 65 [2024-09-12 15:56:43,515 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 15:56:43,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:56:43,516 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:43,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:56:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 15:56:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-12 15:56:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:56:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-12 15:56:43,535 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-12 15:56:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:43,536 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-12 15:56:43,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-12 15:56:43,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-12 15:56:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-12 15:56:43,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:43,541 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:43,557 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:56:43,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:43,746 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:43,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-12 15:56:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:43,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624267974] [2024-09-12 15:56:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:43,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680710622] [2024-09-12 15:56:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:43,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:43,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:43,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:56:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:43,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:56:43,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:56:43,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:56:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 15:56:44,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:44,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624267974] [2024-09-12 15:56:44,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:44,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680710622] [2024-09-12 15:56:44,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680710622] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:56:44,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:56:44,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-12 15:56:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019993882] [2024-09-12 15:56:44,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:56:44,008 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 15:56:44,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 15:56:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:56:44,008 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-12 15:56:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:44,127 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-12 15:56:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 15:56:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-12 15:56:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:44,139 INFO L225 Difference]: With dead ends: 90 [2024-09-12 15:56:44,140 INFO L226 Difference]: Without dead ends: 88 [2024-09-12 15:56:44,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:56:44,141 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:44,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:56:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-12 15:56:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-12 15:56:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 15:56:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-12 15:56:44,161 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-12 15:56:44,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:44,162 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-12 15:56:44,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-12 15:56:44,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-12 15:56:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 15:56:44,169 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:44,170 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:44,187 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:56:44,370 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 15:56:44,370 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:44,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-12 15:56:44,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:44,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648484778] [2024-09-12 15:56:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:44,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:56:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:56:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:56:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:56:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:56:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:56:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:56:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:56:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:56:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:56:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:56:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 15:56:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:44,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648484778] [2024-09-12 15:56:44,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648484778] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:56:44,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405847800] [2024-09-12 15:56:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:44,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:44,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:44,549 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:56:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:44,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:56:44,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 15:56:44,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:56:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 15:56:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405847800] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:56:44,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:56:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-12 15:56:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225958438] [2024-09-12 15:56:44,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:56:44,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:56:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:56:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:56:44,759 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-12 15:56:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:44,939 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-12 15:56:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:56:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-12 15:56:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:44,941 INFO L225 Difference]: With dead ends: 105 [2024-09-12 15:56:44,941 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 15:56:44,941 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:56:44,942 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:44,942 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:56:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 15:56:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-12 15:56:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-12 15:56:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-12 15:56:44,987 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-12 15:56:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:44,988 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-12 15:56:44,988 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-12 15:56:44,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-12 15:56:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 15:56:44,990 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:44,990 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:45,007 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 15:56:45,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:45,191 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:45,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:45,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-12 15:56:45,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:45,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28420652] [2024-09-12 15:56:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:45,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:45,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395656394] [2024-09-12 15:56:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:45,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:45,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:45,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:56:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:45,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 15:56:45,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-12 15:56:45,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:56:45,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:45,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28420652] [2024-09-12 15:56:45,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:45,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395656394] [2024-09-12 15:56:45,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395656394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:56:45,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:56:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-12 15:56:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620688999] [2024-09-12 15:56:45,468 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:56:45,468 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 15:56:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 15:56:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:56:45,469 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-12 15:56:45,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:45,594 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-12 15:56:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:56:45,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-12 15:56:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:45,596 INFO L225 Difference]: With dead ends: 123 [2024-09-12 15:56:45,596 INFO L226 Difference]: Without dead ends: 120 [2024-09-12 15:56:45,597 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:56:45,597 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:45,598 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:56:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-12 15:56:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-12 15:56:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-12 15:56:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-12 15:56:45,633 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-12 15:56:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:45,633 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-12 15:56:45,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-12 15:56:45,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-12 15:56:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-12 15:56:45,635 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:45,635 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:45,653 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 15:56:45,839 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:45,840 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:45,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-12 15:56:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:45,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356975223] [2024-09-12 15:56:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:45,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360027662] [2024-09-12 15:56:45,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:56:45,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:45,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:45,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:56:45,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:56:45,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:56:45,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 15:56:45,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-12 15:56:46,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:56:46,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:46,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356975223] [2024-09-12 15:56:46,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:46,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360027662] [2024-09-12 15:56:46,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360027662] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:56:46,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:56:46,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-12 15:56:46,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695349291] [2024-09-12 15:56:46,242 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:56:46,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 15:56:46,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 15:56:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:56:46,244 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-12 15:56:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:46,430 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-12 15:56:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:56:46,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-12 15:56:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:46,432 INFO L225 Difference]: With dead ends: 129 [2024-09-12 15:56:46,432 INFO L226 Difference]: Without dead ends: 127 [2024-09-12 15:56:46,432 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-12 15:56:46,433 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:46,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:56:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-12 15:56:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-12 15:56:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-12 15:56:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-12 15:56:46,477 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-12 15:56:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:46,477 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-12 15:56:46,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-12 15:56:46,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-12 15:56:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-12 15:56:46,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:46,479 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:46,495 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 15:56:46,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:46,684 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:46,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:46,684 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-12 15:56:46,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:46,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108276770] [2024-09-12 15:56:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:46,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525490139] [2024-09-12 15:56:46,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:56:46,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:46,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:46,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:46,706 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:56:46,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:56:46,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:56:46,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-12 15:56:46,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-12 15:56:47,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:56:57,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108276770] [2024-09-12 15:56:57,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525490139] [2024-09-12 15:56:57,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525490139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:56:57,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:56:57,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-12 15:56:57,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612123959] [2024-09-12 15:56:57,628 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:56:57,629 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 15:56:57,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:57,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 15:56:57,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:56:57,631 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-12 15:56:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:56:58,059 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-12 15:56:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:56:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-12 15:56:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:56:58,061 INFO L225 Difference]: With dead ends: 133 [2024-09-12 15:56:58,061 INFO L226 Difference]: Without dead ends: 131 [2024-09-12 15:56:58,062 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:56:58,062 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:56:58,062 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:56:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-12 15:56:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-12 15:56:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-12 15:56:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-12 15:56:58,097 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-12 15:56:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:56:58,099 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-12 15:56:58,099 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-12 15:56:58,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-12 15:56:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-12 15:56:58,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:56:58,100 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:56:58,118 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 15:56:58,300 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 15:56:58,301 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:56:58,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:56:58,301 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-12 15:56:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:56:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029620501] [2024-09-12 15:56:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:56:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:56:58,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816345361] [2024-09-12 15:56:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:56:58,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:56:58,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:56:58,322 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:56:58,323 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 15:56:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:56:58,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-12 15:56:58,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:56:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-12 15:56:58,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:56:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-12 15:56:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:56:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029620501] [2024-09-12 15:56:59,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:56:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816345361] [2024-09-12 15:56:59,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816345361] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:56:59,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:56:59,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-12 15:56:59,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929217163] [2024-09-12 15:56:59,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:56:59,483 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:56:59,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:56:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:56:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:56:59,484 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-12 15:57:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:02,122 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-12 15:57:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:57:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-12 15:57:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:02,125 INFO L225 Difference]: With dead ends: 229 [2024-09-12 15:57:02,125 INFO L226 Difference]: Without dead ends: 225 [2024-09-12 15:57:02,126 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:57:02,126 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:02,126 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 15:57:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-12 15:57:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-12 15:57:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-12 15:57:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-12 15:57:02,218 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-12 15:57:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:02,218 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-12 15:57:02,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-12 15:57:02,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-12 15:57:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 15:57:02,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:02,220 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:02,235 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 15:57:02,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 15:57:02,421 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:02,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-12 15:57:02,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:02,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761135889] [2024-09-12 15:57:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:57:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:57:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:57:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:57:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:57:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:57:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:57:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:57:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:57:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:57:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:57:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:57:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:57:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:57:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:57:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-12 15:57:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-12 15:57:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:02,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761135889] [2024-09-12 15:57:02,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761135889] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:57:02,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:57:02,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:57:02,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9549221] [2024-09-12 15:57:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:57:02,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:57:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:57:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:57:02,529 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 15:57:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:02,660 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-12 15:57:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:57:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-12 15:57:02,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:02,663 INFO L225 Difference]: With dead ends: 275 [2024-09-12 15:57:02,663 INFO L226 Difference]: Without dead ends: 201 [2024-09-12 15:57:02,664 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:57:02,664 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:02,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:57:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-12 15:57:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-12 15:57:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-12 15:57:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-12 15:57:02,736 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-12 15:57:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:02,736 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-12 15:57:02,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 15:57:02,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-12 15:57:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-12 15:57:02,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:02,738 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:02,738 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-12 15:57:02,738 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:02,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-12 15:57:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:02,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864762893] [2024-09-12 15:57:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:02,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:57:02,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230473692] [2024-09-12 15:57:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:02,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:02,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:02,765 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 15:57:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:02,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 15:57:02,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-12 15:57:03,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:57:03,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:03,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864762893] [2024-09-12 15:57:03,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:57:03,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230473692] [2024-09-12 15:57:03,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230473692] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:57:03,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:57:03,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-12 15:57:03,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251861612] [2024-09-12 15:57:03,877 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:57:03,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 15:57:03,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 15:57:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:57:03,879 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-12 15:57:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:04,647 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-12 15:57:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:57:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-12 15:57:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:04,650 INFO L225 Difference]: With dead ends: 201 [2024-09-12 15:57:04,651 INFO L226 Difference]: Without dead ends: 199 [2024-09-12 15:57:04,652 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-12 15:57:04,653 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:04,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:57:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-12 15:57:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-12 15:57:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-12 15:57:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-12 15:57:04,726 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-12 15:57:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:04,726 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-12 15:57:04,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-12 15:57:04,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-12 15:57:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-12 15:57:04,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:04,728 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:04,740 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 15:57:04,928 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:04,929 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:04,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-12 15:57:04,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:04,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353468543] [2024-09-12 15:57:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:04,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:57:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:57:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:57:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:57:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:57:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:57:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:57:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:57:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:57:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:57:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:57:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 15:57:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-12 15:57:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-12 15:57:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-12 15:57:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-12 15:57:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-12 15:57:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-12 15:57:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-12 15:57:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:57:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-12 15:57:05,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:05,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353468543] [2024-09-12 15:57:05,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353468543] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:57:05,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088495037] [2024-09-12 15:57:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:05,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:05,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:05,095 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:05,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 15:57:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:05,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:57:05,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-12 15:57:05,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:57:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-12 15:57:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088495037] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:57:05,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:57:05,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-12 15:57:05,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731346216] [2024-09-12 15:57:05,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:57:05,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 15:57:05,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 15:57:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:57:05,314 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-12 15:57:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:05,527 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-12 15:57:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:57:05,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-12 15:57:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:05,530 INFO L225 Difference]: With dead ends: 227 [2024-09-12 15:57:05,530 INFO L226 Difference]: Without dead ends: 215 [2024-09-12 15:57:05,530 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:57:05,531 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:05,531 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:57:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-12 15:57:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-12 15:57:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-12 15:57:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-12 15:57:05,595 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-12 15:57:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:05,595 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-12 15:57:05,596 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-12 15:57:05,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-12 15:57:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-12 15:57:05,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:05,597 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:05,613 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 15:57:05,798 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 15:57:05,798 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:05,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-12 15:57:05,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:05,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543812500] [2024-09-12 15:57:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:57:05,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34421991] [2024-09-12 15:57:05,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:57:05,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:05,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:05,842 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 15:57:05,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:57:05,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:57:05,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 15:57:05,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-12 15:57:06,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:57:06,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:06,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543812500] [2024-09-12 15:57:06,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:57:06,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34421991] [2024-09-12 15:57:06,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34421991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:57:06,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:57:06,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-12 15:57:06,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509321899] [2024-09-12 15:57:06,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:57:06,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 15:57:06,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 15:57:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:57:06,294 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-12 15:57:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:06,541 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-12 15:57:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:57:06,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-12 15:57:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:06,543 INFO L225 Difference]: With dead ends: 230 [2024-09-12 15:57:06,543 INFO L226 Difference]: Without dead ends: 227 [2024-09-12 15:57:06,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-12 15:57:06,544 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:06,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:57:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-12 15:57:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-12 15:57:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-12 15:57:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-12 15:57:06,638 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-12 15:57:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:06,638 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-12 15:57:06,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-12 15:57:06,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-12 15:57:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-12 15:57:06,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:06,640 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:06,654 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-12 15:57:06,844 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 15:57:06,844 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:06,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-12 15:57:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:06,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256569964] [2024-09-12 15:57:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:57:06,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849744795] [2024-09-12 15:57:06,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:57:06,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:06,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:06,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:06,880 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 15:57:06,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:57:06,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:57:06,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-12 15:57:06,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-12 15:57:07,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:57:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-12 15:57:07,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:07,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256569964] [2024-09-12 15:57:07,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:57:07,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849744795] [2024-09-12 15:57:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849744795] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:57:07,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:57:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-12 15:57:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023889913] [2024-09-12 15:57:07,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:57:07,791 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:57:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:57:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:57:07,792 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-12 15:57:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:08,846 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-12 15:57:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:57:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-12 15:57:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:08,849 INFO L225 Difference]: With dead ends: 253 [2024-09-12 15:57:08,849 INFO L226 Difference]: Without dead ends: 251 [2024-09-12 15:57:08,850 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:57:08,850 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:08,850 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:57:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-12 15:57:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-12 15:57:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-12 15:57:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-12 15:57:08,956 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-12 15:57:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:08,956 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-12 15:57:08,957 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-12 15:57:08,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-12 15:57:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-12 15:57:08,958 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:08,959 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:08,975 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 15:57:09,159 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 15:57:09,159 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:09,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-12 15:57:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713521760] [2024-09-12 15:57:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:57:09,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370692642] [2024-09-12 15:57:09,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:57:09,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:09,183 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:09,187 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 15:57:09,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:57:09,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:57:09,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 15:57:09,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-09-12 15:57:10,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:57:11,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:11,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713521760] [2024-09-12 15:57:11,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:57:11,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370692642] [2024-09-12 15:57:11,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370692642] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:57:11,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:57:11,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-12 15:57:11,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846469407] [2024-09-12 15:57:11,241 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:57:11,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 15:57:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:11,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 15:57:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:57:11,242 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-12 15:57:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:12,272 INFO L93 Difference]: Finished difference Result 261 states and 362 transitions. [2024-09-12 15:57:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:57:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 128 [2024-09-12 15:57:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:12,274 INFO L225 Difference]: With dead ends: 261 [2024-09-12 15:57:12,274 INFO L226 Difference]: Without dead ends: 259 [2024-09-12 15:57:12,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2024-09-12 15:57:12,275 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:12,275 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 528 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 15:57:12,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-12 15:57:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-09-12 15:57:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 126 states have internal predecessors, (142), 94 states have call successors, (94), 18 states have call predecessors, (94), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-12 15:57:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 327 transitions. [2024-09-12 15:57:12,410 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 327 transitions. Word has length 128 [2024-09-12 15:57:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:12,410 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 327 transitions. [2024-09-12 15:57:12,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-12 15:57:12,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 327 transitions. [2024-09-12 15:57:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-12 15:57:12,413 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:12,413 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:12,429 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-12 15:57:12,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 15:57:12,617 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:12,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-12 15:57:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:12,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452053283] [2024-09-12 15:57:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:12,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:57:12,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69005066] [2024-09-12 15:57:12,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:57:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:12,646 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:12,647 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 15:57:12,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 15:57:12,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:57:12,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-12 15:57:12,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 71 proven. 41 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-09-12 15:57:13,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:57:13,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:13,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452053283] [2024-09-12 15:57:13,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:57:13,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69005066] [2024-09-12 15:57:13,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69005066] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:57:13,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:57:13,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 15:57:13,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762079154] [2024-09-12 15:57:13,892 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:57:13,892 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:57:13,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:13,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:57:13,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:57:13,893 INFO L87 Difference]: Start difference. First operand 235 states and 327 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-12 15:57:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:14,843 INFO L93 Difference]: Finished difference Result 269 states and 372 transitions. [2024-09-12 15:57:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:57:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 131 [2024-09-12 15:57:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:14,845 INFO L225 Difference]: With dead ends: 269 [2024-09-12 15:57:14,846 INFO L226 Difference]: Without dead ends: 267 [2024-09-12 15:57:14,846 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:57:14,846 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:14,847 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 557 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:57:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-12 15:57:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2024-09-12 15:57:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 141 states have internal predecessors, (159), 106 states have call successors, (106), 21 states have call predecessors, (106), 20 states have return successors, (103), 102 states have call predecessors, (103), 103 states have call successors, (103) [2024-09-12 15:57:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 368 transitions. [2024-09-12 15:57:14,988 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 368 transitions. Word has length 131 [2024-09-12 15:57:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:14,989 INFO L474 AbstractCegarLoop]: Abstraction has 265 states and 368 transitions. [2024-09-12 15:57:14,989 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-12 15:57:14,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 368 transitions. [2024-09-12 15:57:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-12 15:57:14,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:14,991 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:15,001 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-12 15:57:15,192 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:15,192 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:15,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-12 15:57:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:15,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827851964] [2024-09-12 15:57:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:57:15,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784347221] [2024-09-12 15:57:15,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:57:15,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:15,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:15,232 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 15:57:15,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:57:15,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:57:15,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-12 15:57:15,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-12 15:57:16,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:57:18,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827851964] [2024-09-12 15:57:18,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:57:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784347221] [2024-09-12 15:57:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784347221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:57:18,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:57:18,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-12 15:57:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073973688] [2024-09-12 15:57:18,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:57:18,601 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:57:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:57:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:57:18,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-09-12 15:57:18,602 INFO L87 Difference]: Start difference. First operand 265 states and 368 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-12 15:57:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:57:19,453 INFO L93 Difference]: Finished difference Result 305 states and 426 transitions. [2024-09-12 15:57:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:57:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-09-12 15:57:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:57:19,456 INFO L225 Difference]: With dead ends: 305 [2024-09-12 15:57:19,456 INFO L226 Difference]: Without dead ends: 298 [2024-09-12 15:57:19,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 15:57:19,458 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:57:19,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 592 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:57:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-09-12 15:57:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 278. [2024-09-12 15:57:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 146 states have (on average 1.1506849315068493) internal successors, (168), 149 states have internal predecessors, (168), 110 states have call successors, (110), 22 states have call predecessors, (110), 21 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-12 15:57:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 385 transitions. [2024-09-12 15:57:19,639 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 385 transitions. Word has length 137 [2024-09-12 15:57:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:57:19,639 INFO L474 AbstractCegarLoop]: Abstraction has 278 states and 385 transitions. [2024-09-12 15:57:19,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-12 15:57:19,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 385 transitions. [2024-09-12 15:57:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-12 15:57:19,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:57:19,642 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:57:19,662 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-12 15:57:19,846 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:19,847 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:57:19,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:57:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1268175597, now seen corresponding path program 6 times [2024-09-12 15:57:19,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:57:19,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636864326] [2024-09-12 15:57:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:57:19,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:57:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:57:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:57:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-12 15:57:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:57:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:57:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:57:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:57:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-12 15:57:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-12 15:57:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-12 15:57:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 15:57:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 15:57:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-12 15:57:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 15:57:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-12 15:57:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-12 15:57:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-12 15:57:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-12 15:57:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-12 15:57:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-12 15:57:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-12 15:57:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-12 15:57:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-12 15:57:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-12 15:57:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-12 15:57:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-12 15:57:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:57:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 58 proven. 53 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-09-12 15:57:20,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:57:20,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636864326] [2024-09-12 15:57:20,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636864326] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:57:20,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122731368] [2024-09-12 15:57:20,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:57:20,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:57:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:57:20,211 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:57:20,212 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 15:57:20,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:57:20,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:57:20,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:57:20,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:57:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 162 proven. 42 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2024-09-12 15:57:21,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:58:05,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122731368] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:58:05,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:58:05,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2024-09-12 15:58:05,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189679396] [2024-09-12 15:58:05,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:58:05,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:58:05,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:58:05,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:58:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 15:58:05,365 INFO L87 Difference]: Start difference. First operand 278 states and 385 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) [2024-09-12 15:58:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:58:08,479 INFO L93 Difference]: Finished difference Result 401 states and 565 transitions. [2024-09-12 15:58:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-12 15:58:08,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) Word has length 150 [2024-09-12 15:58:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:58:08,488 INFO L225 Difference]: With dead ends: 401 [2024-09-12 15:58:08,489 INFO L226 Difference]: Without dead ends: 336 [2024-09-12 15:58:08,490 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=700, Invalid=3206, Unknown=0, NotChecked=0, Total=3906 [2024-09-12 15:58:08,491 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 88 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:58:08,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 991 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:58:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-09-12 15:58:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2024-09-12 15:58:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 168 states have (on average 1.1547619047619047) internal successors, (194), 171 states have internal predecessors, (194), 130 states have call successors, (130), 24 states have call predecessors, (130), 23 states have return successors, (127), 126 states have call predecessors, (127), 127 states have call successors, (127) [2024-09-12 15:58:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 451 transitions. [2024-09-12 15:58:08,692 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 451 transitions. Word has length 150 [2024-09-12 15:58:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:58:08,692 INFO L474 AbstractCegarLoop]: Abstraction has 322 states and 451 transitions. [2024-09-12 15:58:08,693 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) [2024-09-12 15:58:08,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:58:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 451 transitions. [2024-09-12 15:58:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-12 15:58:08,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:58:08,695 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:58:08,703 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 15:58:08,899 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:58:08,900 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:58:08,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:58:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 680663563, now seen corresponding path program 7 times [2024-09-12 15:58:08,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:58:08,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283486901] [2024-09-12 15:58:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:58:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:58:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:58:08,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563843507] [2024-09-12 15:58:08,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:58:08,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:58:08,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:58:08,922 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:58:08,924 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 15:58:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:58:09,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-12 15:58:09,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:58:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 97 proven. 82 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2024-09-12 15:58:11,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:58:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:58:11,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283486901] [2024-09-12 15:58:11,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:58:11,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563843507] [2024-09-12 15:58:11,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563843507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:58:11,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:58:11,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-12 15:58:11,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891404019] [2024-09-12 15:58:11,391 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:58:11,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:58:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:58:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:58:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:58:11,392 INFO L87 Difference]: Start difference. First operand 322 states and 451 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-12 15:58:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:58:12,953 INFO L93 Difference]: Finished difference Result 354 states and 495 transitions. [2024-09-12 15:58:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:58:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 153 [2024-09-12 15:58:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:58:12,957 INFO L225 Difference]: With dead ends: 354 [2024-09-12 15:58:12,957 INFO L226 Difference]: Without dead ends: 352 [2024-09-12 15:58:12,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:58:12,958 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:58:12,958 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 665 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-12 15:58:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-09-12 15:58:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 319. [2024-09-12 15:58:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 165 states have (on average 1.1575757575757575) internal successors, (191), 168 states have internal predecessors, (191), 130 states have call successors, (130), 24 states have call predecessors, (130), 23 states have return successors, (127), 126 states have call predecessors, (127), 127 states have call successors, (127) [2024-09-12 15:58:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 448 transitions. [2024-09-12 15:58:13,150 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 448 transitions. Word has length 153 [2024-09-12 15:58:13,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:58:13,150 INFO L474 AbstractCegarLoop]: Abstraction has 319 states and 448 transitions. [2024-09-12 15:58:13,151 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-12 15:58:13,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:58:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 448 transitions. [2024-09-12 15:58:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-12 15:58:13,153 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:58:13,153 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:58:13,170 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-12 15:58:13,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-12 15:58:13,355 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:58:13,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:58:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 8 times [2024-09-12 15:58:13,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:58:13,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888773795] [2024-09-12 15:58:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:58:13,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:58:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:58:13,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100102874] [2024-09-12 15:58:13,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:58:13,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:58:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:58:13,390 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:58:13,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 15:58:13,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:58:13,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:58:13,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-12 15:58:13,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:58:35,287 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 15:59:04,618 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 15:59:16,647 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 15:59:24,654 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 15:59:36,669 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:00:01,285 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:00:09,293 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:00:17,299 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 16:00:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 178 proven. 102 refuted. 1 times theorem prover too weak. 564 trivial. 0 not checked. [2024-09-12 16:00:17,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:00:31,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:00:31,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888773795] [2024-09-12 16:00:31,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:00:31,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100102874] [2024-09-12 16:00:31,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100102874] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:00:31,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:00:31,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-12 16:00:31,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737843161] [2024-09-12 16:00:31,982 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:00:31,982 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 16:00:31,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:00:31,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 16:00:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=512, Unknown=4, NotChecked=0, Total=600 [2024-09-12 16:00:31,983 INFO L87 Difference]: Start difference. First operand 319 states and 448 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-12 16:00:39,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:00:45,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:00:49,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:00:51,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:00:53,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:00:59,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-12 16:01:00,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:00,149 INFO L93 Difference]: Finished difference Result 387 states and 554 transitions. [2024-09-12 16:01:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:01:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) Word has length 153 [2024-09-12 16:01:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:00,152 INFO L225 Difference]: With dead ends: 387 [2024-09-12 16:01:00,152 INFO L226 Difference]: Without dead ends: 385 [2024-09-12 16:01:00,153 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=161, Invalid=1025, Unknown=4, NotChecked=0, Total=1190 [2024-09-12 16:01:00,153 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 29 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:00,153 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 747 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 744 Invalid, 3 Unknown, 0 Unchecked, 25.8s Time] [2024-09-12 16:01:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-12 16:01:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 368. [2024-09-12 16:01:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 189 states have internal predecessors, (218), 155 states have call successors, (155), 26 states have call predecessors, (155), 25 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2024-09-12 16:01:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 525 transitions. [2024-09-12 16:01:00,403 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 525 transitions. Word has length 153 [2024-09-12 16:01:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:00,403 INFO L474 AbstractCegarLoop]: Abstraction has 368 states and 525 transitions. [2024-09-12 16:01:00,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-12 16:01:00,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 525 transitions. [2024-09-12 16:01:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-12 16:01:00,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:00,405 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:00,421 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 16:01:00,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-12 16:01:00,609 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:00,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-12 16:01:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:00,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091726829] [2024-09-12 16:01:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:00,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:01:00,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924980668] [2024-09-12 16:01:00,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:01:00,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:00,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:00,642 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:01:00,644 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 16:01:00,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:01:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:01:00,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 16:01:00,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-12 16:01:01,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:01:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091726829] [2024-09-12 16:01:05,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:01:05,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924980668] [2024-09-12 16:01:05,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924980668] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:01:05,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 16:01:05,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 16:01:05,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121598492] [2024-09-12 16:01:05,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 16:01:05,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 16:01:05,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 16:01:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-12 16:01:05,962 INFO L87 Difference]: Start difference. First operand 368 states and 525 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 16:01:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:06,547 INFO L93 Difference]: Finished difference Result 384 states and 538 transitions. [2024-09-12 16:01:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:01:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-09-12 16:01:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:06,551 INFO L225 Difference]: With dead ends: 384 [2024-09-12 16:01:06,551 INFO L226 Difference]: Without dead ends: 377 [2024-09-12 16:01:06,551 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-12 16:01:06,552 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:06,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 332 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:01:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-09-12 16:01:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2024-09-12 16:01:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 193 states have (on average 1.1554404145077721) internal successors, (223), 195 states have internal predecessors, (223), 155 states have call successors, (155), 28 states have call predecessors, (155), 27 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2024-09-12 16:01:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 530 transitions. [2024-09-12 16:01:06,880 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 530 transitions. Word has length 156 [2024-09-12 16:01:06,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:06,881 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 530 transitions. [2024-09-12 16:01:06,881 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 16:01:06,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:06,881 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 530 transitions. [2024-09-12 16:01:06,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-12 16:01:06,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:06,882 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:06,895 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-12 16:01:07,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:07,083 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:07,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-09-12 16:01:07,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:07,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718171838] [2024-09-12 16:01:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:07,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:01:07,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153788964] [2024-09-12 16:01:07,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:01:07,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:07,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:07,107 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:01:07,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 16:01:07,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:01:07,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:01:07,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-12 16:01:07,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 99 proven. 89 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2024-09-12 16:01:08,413 INFO L327 TraceCheckSpWp]: Computing backward predicates...