./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:28:24,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:28:24,659 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:28:24,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:28:24,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:28:24,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:28:24,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:28:24,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:28:24,698 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:28:24,699 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:28:24,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:28:24,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:28:24,701 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:28:24,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:28:24,703 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:28:24,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:28:24,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:28:24,704 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:28:24,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:28:24,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:28:24,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:28:24,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:28:24,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:28:24,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:28:24,709 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:28:24,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:28:24,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:28:24,710 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:28:24,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:28:24,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:28:24,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:28:24,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:28:24,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:28:24,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:28:24,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:28:24,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:28:24,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:28:24,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:28:24,713 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:28:24,713 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:28:24,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:28:24,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:28:24,715 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:28:24,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:28:25,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:28:25,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:28:25,015 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:28:25,015 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:28:25,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-20 12:28:26,496 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:28:26,674 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:28:26,675 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2024-09-20 12:28:26,683 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/95ef8f00a/18cf3e14080c470d8c4082917e7605f3/FLAGd8feba349 [2024-09-20 12:28:26,700 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/95ef8f00a/18cf3e14080c470d8c4082917e7605f3 [2024-09-20 12:28:26,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:28:26,704 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:28:26,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:28:26,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:28:26,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:28:26,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27670a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26, skipping insertion in model container [2024-09-20 12:28:26,717 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:28:26,886 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2024-09-20 12:28:26,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:28:26,915 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:28:26,926 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2024-09-20 12:28:26,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:28:26,947 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:28:26,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26 WrapperNode [2024-09-20 12:28:26,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:28:26,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:28:26,950 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:28:26,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:28:26,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,967 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:28:26,967 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:28:26,968 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:28:26,968 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:28:26,968 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:28:26,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,978 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,990 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]. [2024-09-20 12:28:26,990 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,993 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:26,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:27,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:28:27,001 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:28:27,001 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:28:27,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:28:27,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (1/1) ... [2024-09-20 12:28:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:28:27,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:28:27,034 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) [2024-09-20 12:28:27,041 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 [2024-09-20 12:28:27,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:28:27,074 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:28:27,074 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:28:27,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:28:27,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:28:27,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:28:27,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:28:27,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:28:27,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:28:27,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:28:27,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:28:27,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:28:27,130 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:28:27,132 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:28:27,303 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:28:27,304 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:28:27,323 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:28:27,323 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:28:27,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:28:27 BoogieIcfgContainer [2024-09-20 12:28:27,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:28:27,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:28:27,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:28:27,330 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:28:27,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:28:26" (1/3) ... [2024-09-20 12:28:27,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68064c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:28:27, skipping insertion in model container [2024-09-20 12:28:27,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:28:26" (2/3) ... [2024-09-20 12:28:27,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68064c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:28:27, skipping insertion in model container [2024-09-20 12:28:27,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:28:27" (3/3) ... [2024-09-20 12:28:27,334 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2024-09-20 12:28:27,348 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:28:27,349 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:28:27,412 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:28:27,418 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;@2a571e09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:28:27,419 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:28:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:28:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:28:27,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:27,453 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:27,454 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:27,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1602480078, now seen corresponding path program 1 times [2024-09-20 12:28:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698307974] [2024-09-20 12:28:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:27,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:28:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:27,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:28:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:27,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:28:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:27,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:27,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698307974] [2024-09-20 12:28:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698307974] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:28:27,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:28:27,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 12:28:27,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088450822] [2024-09-20 12:28:27,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:28:27,751 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 12:28:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 12:28:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:28:27,778 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:28:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:27,868 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2024-09-20 12:28:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 12:28:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-20 12:28:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:27,880 INFO L225 Difference]: With dead ends: 57 [2024-09-20 12:28:27,880 INFO L226 Difference]: Without dead ends: 28 [2024-09-20 12:28:27,883 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 12:28:27,886 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:27,889 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:28:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-20 12:28:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-09-20 12:28:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:28:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-20 12:28:27,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2024-09-20 12:28:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:27,936 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-20 12:28:27,937 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:28:27,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-20 12:28:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 12:28:27,943 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:27,943 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:27,944 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:28:27,944 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:27,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash 610811680, now seen corresponding path program 1 times [2024-09-20 12:28:27,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:27,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140459859] [2024-09-20 12:28:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:28:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:28:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:28:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:28,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:28,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140459859] [2024-09-20 12:28:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140459859] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:28:28,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:28:28,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:28:28,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368639455] [2024-09-20 12:28:28,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:28:28,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:28:28,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:28:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:28:28,198 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:28:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:28,297 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-09-20 12:28:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:28:28,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-20 12:28:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:28,299 INFO L225 Difference]: With dead ends: 41 [2024-09-20 12:28:28,299 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 12:28:28,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:28:28,301 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:28,301 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:28:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 12:28:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-20 12:28:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:28:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-20 12:28:28,310 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2024-09-20 12:28:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:28,312 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-20 12:28:28,312 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:28:28,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-20 12:28:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:28:28,314 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:28,314 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:28,315 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:28:28,315 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:28,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1424295131, now seen corresponding path program 1 times [2024-09-20 12:28:28,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:28,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296373320] [2024-09-20 12:28:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:28,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:28:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:28:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:28:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:28,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:28,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296373320] [2024-09-20 12:28:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296373320] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:28:28,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:28:28,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 12:28:28,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113408093] [2024-09-20 12:28:28,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:28:28,526 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:28:28,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:28,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:28:28,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:28:28,527 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:28:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:28,638 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-09-20 12:28:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:28:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-20 12:28:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:28,640 INFO L225 Difference]: With dead ends: 40 [2024-09-20 12:28:28,641 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 12:28:28,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:28:28,643 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:28,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:28:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 12:28:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-20 12:28:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 12:28:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-20 12:28:28,653 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2024-09-20 12:28:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:28,654 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-20 12:28:28,654 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:28:28,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-20 12:28:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:28:28,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:28,656 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:28,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:28:28,656 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:28,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1426082591, now seen corresponding path program 1 times [2024-09-20 12:28:28,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185656130] [2024-09-20 12:28:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:28:28,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821849746] [2024-09-20 12:28:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:28,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:28,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:28:28,681 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) [2024-09-20 12:28:28,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:28:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:28,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:28:28,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:28:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:28,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:28:28,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:28,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185656130] [2024-09-20 12:28:28,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:28:28,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821849746] [2024-09-20 12:28:28,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821849746] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:28:28,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:28:28,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:28:28,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201381911] [2024-09-20 12:28:28,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:28:28,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:28:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:28,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:28:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:28:28,857 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:28:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:28,954 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-09-20 12:28:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:28:28,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-20 12:28:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:28,956 INFO L225 Difference]: With dead ends: 44 [2024-09-20 12:28:28,956 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 12:28:28,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:28:28,959 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:28,959 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 90 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:28:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 12:28:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-20 12:28:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:28:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-09-20 12:28:28,978 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2024-09-20 12:28:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:28,979 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-09-20 12:28:28,979 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:28:28,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-09-20 12:28:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:28:28,982 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:28,983 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:29,003 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:28:29,183 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:29,184 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:29,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1945714758, now seen corresponding path program 1 times [2024-09-20 12:28:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:29,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373325901] [2024-09-20 12:28:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:29,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:28:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:29,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:28:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:29,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:28:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:29,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:28:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373325901] [2024-09-20 12:28:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373325901] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:28:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361562475] [2024-09-20 12:28:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:29,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:28:29,380 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) [2024-09-20 12:28:29,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:28:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:29,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:28:29,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:28:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:29,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:28:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:29,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361562475] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:28:29,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:28:29,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2024-09-20 12:28:29,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489158954] [2024-09-20 12:28:29,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:28:29,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 12:28:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 12:28:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-09-20 12:28:29,648 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-20 12:28:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:29,835 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2024-09-20 12:28:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 12:28:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 34 [2024-09-20 12:28:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:29,837 INFO L225 Difference]: With dead ends: 111 [2024-09-20 12:28:29,837 INFO L226 Difference]: Without dead ends: 104 [2024-09-20 12:28:29,838 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:28:29,839 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:29,839 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:28:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-20 12:28:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2024-09-20 12:28:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:28:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2024-09-20 12:28:29,858 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 34 [2024-09-20 12:28:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:29,859 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2024-09-20 12:28:29,859 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-20 12:28:29,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2024-09-20 12:28:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:28:29,861 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:29,861 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:29,878 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:28:30,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:30,066 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:30,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:30,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1947502218, now seen corresponding path program 1 times [2024-09-20 12:28:30,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:30,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791167690] [2024-09-20 12:28:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:30,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:28:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:28:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:28:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:28:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:28:30,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:30,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791167690] [2024-09-20 12:28:30,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791167690] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:28:30,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:28:30,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 12:28:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84683161] [2024-09-20 12:28:30,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:28:30,293 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 12:28:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 12:28:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:28:30,293 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:28:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:30,362 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2024-09-20 12:28:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:28:30,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-20 12:28:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:30,365 INFO L225 Difference]: With dead ends: 145 [2024-09-20 12:28:30,366 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 12:28:30,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:28:30,368 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:30,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:28:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 12:28:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 12:28:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 58 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:28:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-09-20 12:28:30,393 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 34 [2024-09-20 12:28:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:30,394 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-09-20 12:28:30,394 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:28:30,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-09-20 12:28:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:28:30,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:30,397 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:30,397 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 12:28:30,397 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:30,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1464105851, now seen corresponding path program 1 times [2024-09-20 12:28:30,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:30,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114014662] [2024-09-20 12:28:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:30,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:28:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:28:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:28:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:28:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 12:28:30,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:30,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114014662] [2024-09-20 12:28:30,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114014662] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:28:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874949521] [2024-09-20 12:28:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:30,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:28:30,522 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) [2024-09-20 12:28:30,523 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:28:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:30,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:28:30,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:28:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 12:28:30,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:28:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 12:28:30,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874949521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:28:30,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:28:30,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-20 12:28:30,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820252720] [2024-09-20 12:28:30,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:28:30,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:28:30,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:28:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:28:30,700 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-20 12:28:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:30,841 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2024-09-20 12:28:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 12:28:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 36 [2024-09-20 12:28:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:30,845 INFO L225 Difference]: With dead ends: 128 [2024-09-20 12:28:30,846 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 12:28:30,846 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:28:30,847 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:30,849 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:28:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 12:28:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 12:28:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 60 states have internal predecessors, (72), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:28:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2024-09-20 12:28:30,872 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 36 [2024-09-20 12:28:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:30,872 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2024-09-20 12:28:30,872 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-20 12:28:30,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2024-09-20 12:28:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 12:28:30,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:30,874 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:30,890 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:28:31,078 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 12:28:31,079 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:31,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1516658666, now seen corresponding path program 1 times [2024-09-20 12:28:31,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:31,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903324195] [2024-09-20 12:28:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:28:31,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062753910] [2024-09-20 12:28:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:31,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:28:31,116 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) [2024-09-20 12:28:31,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:28:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:31,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:28:31,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:28:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 12:28:31,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:28:39,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903324195] [2024-09-20 12:28:39,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:28:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062753910] [2024-09-20 12:28:39,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062753910] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:28:39,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:28:39,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 12:28:39,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748968832] [2024-09-20 12:28:39,908 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:28:39,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 12:28:39,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:39,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 12:28:39,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2024-09-20 12:28:39,910 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:28:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:40,030 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2024-09-20 12:28:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:28:40,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-20 12:28:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:40,032 INFO L225 Difference]: With dead ends: 90 [2024-09-20 12:28:40,032 INFO L226 Difference]: Without dead ends: 86 [2024-09-20 12:28:40,033 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=36, Invalid=119, Unknown=1, NotChecked=0, Total=156 [2024-09-20 12:28:40,034 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:40,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:28:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-20 12:28:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2024-09-20 12:28:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 58 states have internal predecessors, (68), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:28:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2024-09-20 12:28:40,049 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 37 [2024-09-20 12:28:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:40,050 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2024-09-20 12:28:40,050 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:28:40,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2024-09-20 12:28:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:28:40,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:40,052 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:40,062 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 12:28:40,253 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:40,253 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:40,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:40,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1803442657, now seen corresponding path program 2 times [2024-09-20 12:28:40,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115476619] [2024-09-20 12:28:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:40,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:40,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:28:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:40,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:28:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:40,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 12:28:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:40,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 12:28:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:40,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:28:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:28:40,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:28:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115476619] [2024-09-20 12:28:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115476619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:28:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496598703] [2024-09-20 12:28:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:28:40,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:40,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:28:40,863 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) [2024-09-20 12:28:40,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:28:40,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:28:40,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:28:40,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:28:41,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:28:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 12:28:41,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:28:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 12:28:43,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496598703] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:28:43,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:28:43,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 9] total 24 [2024-09-20 12:28:43,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397690219] [2024-09-20 12:28:43,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:28:43,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 12:28:43,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:28:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 12:28:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-20 12:28:43,224 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 12:28:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:28:44,809 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2024-09-20 12:28:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 12:28:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 46 [2024-09-20 12:28:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:28:44,811 INFO L225 Difference]: With dead ends: 118 [2024-09-20 12:28:44,811 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 12:28:44,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:28:44,812 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:28:44,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 245 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 12:28:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 12:28:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2024-09-20 12:28:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:28:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-09-20 12:28:44,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 46 [2024-09-20 12:28:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:28:44,831 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-09-20 12:28:44,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 19 states have internal predecessors, (62), 8 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 12:28:44,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-09-20 12:28:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 12:28:44,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:28:44,835 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:28:44,852 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:28:45,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:45,037 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:28:45,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:28:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash 182266171, now seen corresponding path program 1 times [2024-09-20 12:28:45,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:28:45,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238573163] [2024-09-20 12:28:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:28:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:28:45,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776617143] [2024-09-20 12:28:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:28:45,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:28:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:28:45,119 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) [2024-09-20 12:28:45,124 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:28:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:28:45,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 12:28:45,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:28:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:28:47,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:29:56,141 WARN L293 SmtUtils]: Spent 8.06s 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) [2024-09-20 12:30:18,898 WARN L293 SmtUtils]: Spent 8.61s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:30:45,564 WARN L293 SmtUtils]: Spent 5.00s 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) [2024-09-20 12:30:50,604 WARN L293 SmtUtils]: Spent 5.02s 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) [2024-09-20 12:31:39,952 WARN L293 SmtUtils]: Spent 8.12s 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) [2024-09-20 12:31:54,275 WARN L293 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:32:07,180 WARN L293 SmtUtils]: Spent 8.20s 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) [2024-09-20 12:32:19,447 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-20 12:32:47,359 WARN L293 SmtUtils]: Spent 5.63s 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)